For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.

Current transducer CKSR series N = 6, 5, 25, 5 A Ref: CKSR 6-NP, CKSR 5-NP, CKSR 25-NP, CKSR 5-NP For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Closed loop (compensated) multi-range current transducer Voltage output Single supply Single supply Compact design for PCB mounting. Advantages Very low temperature coefficient of offset Very good dv/dt immunity Higher creepage distance/clearance Reduced height Reference pin with two modes: Ref IN and Ref OUT Extended measuring range for unipolar measurement. Applications AC variable speed and servo motor drives Static converters for DC motor drives Battery supplied applications Uninterruptible Power Supplies (UPS) Switched Mode Power Supplies (SMPS) Power supplies for welding applications Solar inverters. Standards EN 578: 997 IEC 695-: 26 IEC 6-: 2 IEC 6326-: 22 UL 58: 2. Application Domains Industrial Automotive (list of additional tests available at LEM_Auto_Tech_Support@lem.com). N 97.E7.9..7, N 97.E7.5..7, N 97.E7.9..7, N 97.E7.25..7 Page /9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Absolute maximum ratings Parameter Symbol Unit Value Supply voltage U C V 7 Primary conductor temperature T B C Maximum steady state primary current A 2 N ESD rating, Human Body Model (HBM) U ESD kv 4 Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. UL 58: Ratings and assumptions of certification File # E8973 Volume: 2 Section: Standards CSA C22.2 NO. 4- INDUSTRIAL CONTROL EQUIPMENT - Edition - Revision Date 2/8/ UL 58 STANDARD FOR INDUSTRIAL CONTROL EQUIPMENT - Edition 7 - Revision Date 2/4/5 Ratings Parameter Symbol Unit Value Primary involved potential V AC/DC Max surrounding air temperature T A C 5 Primary current A According to series primary currents Secondary supply voltage U C V DC 7 Output voltage V to 5 Conditions of acceptability When installed in the end-use equipment, consideration shall be given to the following: - These devices must be mounted in a suitable end-use enclosure. 4 - CKSR series intended to be mounted on the printed circuit wiring board of the end-use equipment (with a minimum CTI of ). 5 - CKSR series shall be used in a pollution degree 2. 8 - Low voltage circuits are intended to be powered by a circuit derived from an isolating source (such as transformer, optical isolator, limiting impedance or electro-mechanical relay) and having no direct connection back to the primary circuit (other than through the grounding means). - CKSR series: based on results of temperature tests, in the end-use application, a maximum of C cannot be exceeded at soldering joint between primary coil pin and soldering point (corrected to the appropriate evaluated max. surrounding air). Marking Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL's Follow- Up Service. Always look for the Mark on the product. Page 2/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Insulation coordination Parameter Symbol Unit Value Comment Rms voltage for AC insulation test, 5 Hz, min U d kv 4.3 Impulse withstand voltage.2/5 µs U W kv 8 Partial discharge extinction rms voltage @ pc U e V Clearance distance (pri. - sec.) d CI mm 8.2 Creepage distance (pri. - sec.) d Cp mm 8.2 Shortest distance through air Shortest path along device body Case material - - V according to UL 94 Comparative tracking index CTI 6 Application example - - Application example - - Application example - - 3 V CAT III PD2 6 V CAT III PD2 V CAT III PD2 Reinforced insulation, non uniform field according to IEC 6- Reinforced insulation, non uniform field according to EN 578 Simple insulation, non uniform field according to EN 578 Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Comment Ambient operating temperature T A C 4 5 Ambient storage temperature T S C 55 5 Mass m g 9 Page 3/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Electrical data CKSR 6-NP CKSR series At T A = 25 C, U C = +5 V, N P = turn, R L, internal reference, unless otherwise noted (see Min, Max, typ. definition paragraph in page 3). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current N A 6 Primary current, measuring range M A 2 2 Number of primary turns N P -, 2, 3, 4 Supply voltage U C V 4.75 5 5.25 Apply derating according to fig. 25 Current consumption I C ma 5 + (ma) 2 + (ma) = 73 turns Reference voltage @ = A V ref V 95 5 Internal reference External reference voltage V ref V 4 Output voltage V.375 4.625 Output voltage @ = A V V ref Electrical offset voltage V OE mv 5.3 5.3 % tested V ref Electrical offset current referred to primary I OE ma 5 5 % tested Temperature coefficient of V ref TCV ref ppm/k ±5 ±5 Internal reference Temperature coefficient of @ = A TC ppm/k ±6 ±4 ppm/k of V 4 C 5 C (at ±6 Sigma) Theoretical sensitivity G th mv/a 4.2 625 mv/n Sensitivity error ε G %.7.7 % tested Temperature coefficient of G TCG ppm/k ±4 4 C 5 C Linearity error ε L % of N.. Magnetic offset current @ = and specified R M, after an overload of N I OM A.. Output rms current noise spectral density Hz khz referred to primary Peak-peak output ripple at oscillator frequency f = 45 khz (typ.) i no µa/hz ½ 2 R L - mv 4 6 R L Reaction time @ % of N t ra µs.3 Response time @ 9 % of N t r µs.3 R L di/dt = 8 A/µs R L di/dt = 8 A/µs Frequency bandwidth (± db) BW khz 2 R L Frequency bandwidth (±3 db) BW khz 3 R L Overall accuracy X G % of N.7 Overall accuracy @ T A = 85 C (5 C) X G % of N 2.2 () Accuracy X % of N.8 Accuracy @ T A = 85 C (5 C X % of N.4 (.6) Page 4/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Electrical data CKSR 5-NP CKSR series At T A = 25 C, U C = +5 V, N P = turn, R L, internal reference, unless otherwise noted (see Min, Max, typ. definition paragraph in page 3). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current N A 5 Apply derating according to fig. 26 Primary current, measuring range M A 5 5 Number of primary turns N P -, 2, 3, 4 Supply voltage U C V 4.75 5 5.25 Current consumption I C ma 5 + (ma) 2 + (ma) = 73 turns Reference voltage @ = A V ref V 95 5 Internal reference External reference voltage V ref V 4 Output voltage V.375 4.625 Output voltage @ = A V V ref Electrical offset voltage V OE mv 2.2 2.2 % tested V ref Electrical offset current referred to primary I OE ma 53 53 % tested Temperature coefficient of V ref TCV ref ppm/k ±5 ±5 Internal reference Temperature coefficient of @ = A TCV OUT ppm/k ±2.3 ±6 ppm/k of V 4 C 5 C (at ±6 Sigma) Theoretical sensitivity G th mv/a 4.67 625 mv/n Sensitivity error ε G %.7.7 % tested Temperature coefficient of G TCG ppm/k ±4 4 C 5 C Linearity error ε L % of N.. Magnetic offset current @ = and specified R M, after an overload of N I OM A.. Output rms current noise spectral density Hz khz referred to primary Peak-peak output ripple at oscillator frequency f = 45 khz (typ.) i no µa/hz ½ 2 R L - mv 5 6 R L Reaction time @ % of N t ra µs.3 Response time @ 9 % of N t r µs.3 R L di/dt = 44 A/µs R L di/dt = 44 A/µs Frequency bandwidth (± db) BW khz 2 R L Frequency bandwidth (±3 db) BW khz 3 R L Overall accuracy X G % of N.2 Overall accuracy @ T A = 85 C (5 C) X G % of N.5 (.7) Accuracy X % of N.8 Accuracy @ T A = 85 C (5 C) X % of N.2 (.3) Page 5/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Electrical data CKSR 25-NP CKSR series At T A = 25 C, U C = +5 V, N P = turn, R L, internal reference, unless otherwise noted (see Min, Max, typ. definition paragraph in page 3). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current N A 25 Apply derating according to fig. 27 Primary current, measuring range M A 85 85 Number of primary turns N P -, 2, 3, 4 Supply voltage U C V 4.75 5 5.25 Current consumption I C ma 5 + (ma) 2 + (ma) = 73 turns Reference voltage @ = A V ref V 95 5 Internal reference External reference voltage V ref V 4 Output voltage V.375 4.625 Output voltage @ = A V V ref Electrical offset voltage V OE mv.35.35 % tested V ref Electrical offset current referred to primary I OE ma 54 54 % tested Temperature coefficient of V ref TCV ref ppm/k ±5 ±5 Internal reference Temperature coefficient of @ = A TC ppm/k ±.4 ±4 ppm/k of V 4 C 5 C (at ±6 Sigma) Theoretical sensitivity G th mv/a 25 625 mv/n Sensitivity error ε G %.7.7 % tested Temperature coefficient of G TCG ppm/k ±4 4 C 5 C Linearity error ε L % of N.. Magnetic offset current @ = and specified R M, after an overload I OM A.. of N Output rms current noise spectral density Hz khz referred to primary Peak-peak output ripple at oscillator frequency f = 45 khz (typ.) i no µa/hz ½ 2 R L - mv 4 R L Reaction time @ % of N t ra µs.3 R L di/dt = 68 A/µs Response time @ 9 % of N t r µs.3 R L di/dt = 68 A/µs Frequency bandwidth (± db) BW khz 2 R L Frequency bandwidth (±3 db) BW khz 3 R L Overall accuracy X G % of N Overall accuracy @ T A = 85 C (5 C) X G % of N.35 (.45) Accuracy X % of N.8 Accuracy @ T A = 85 C (5 C) X % of N.5 (.25) Page 6/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Electrical data CKSR 5-NP CKSR series At T A = 25 C, U C = +5 V, N P = turn, R L, internal reference, unless otherwise noted (see Min, Max, typ. definition paragraph in page 3). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current N A 5 Apply derating according to fig. 28 Primary current, measuring range M A 5 5 Number of primary turns N P -, 2, 3, 4 Supply voltage U C V 4.75 5 5.25 Current consumption I C ma 5 + (ma) 2 + (ma) = 966 turns Reference voltage @ = A V ref V 95 5 Internal reference External reference voltage V ref V 4 Output voltage V.375 4.625 Output voltage @ = A V V ref Electrical offset voltage V OE mv.725.725 % tested V ref Electrical offset current referred to primary I OE ma 58 58 % tested Temperature coefficient of V ref TCV ref ppm/k ±5 ±5 Internal reference Temperature coefficient of @ = A TC ppm/k ±.7 ±3 ppm/k of V 4 C 5 C (at ±6 sigma) Theoretical sensitivity G th mv/a 625 mv/n Sensitivity error ε G %.7.7 % tested Temperature coefficient of G TCG ppm/k ±4 4 C 5 C Linearity error ε L % of N.. Magnetic offset current ( N ) referred to primary Output rms current noise spectral density Hz khz referred to primary Peak-peak output ripple at oscillator frequency = 45 khz (Typ.) I OM A.. i no µa/hz ½ 2 R L - mv 5 2 R L Reaction time @ % of N t ra µs.3 Response time @ 9 % of N t r µs.3 R L di/dt = A/µs R L di/dt = A/µs Frequency bandwidth (± db) BW khz 2 R L Frequency bandwidth (±3 db) BW khz 3 R L Overall accuracy X G % of N.9 Overall accuracy @ T A = 85 C (5 C) X G % of N.2 (.3) Accuracy X % of N.8 Accuracy @ T A = 85 C (5 C) X % of N. (.3) Page 7/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Typical performance characteristics CKSR 6-NP Linearity error (% of N)..5 -.5 -. -6 6 (A) Figure : Linearity error Relative Sensitivity (db).8.6.4.2 -.2 -.4 -.6 -.8 - Relative Sensitivity Phase Frequency (Hz) Figure 2: Frequency response = 6 A - -2-3 -4-5 -6-7 -8-9 Phase ( ) 7 7 6 3. 6 3. 5 3. 5 3. IP (A) 4 3 2 = 6 A 2.9 2.7 (A) 4 3 2 = 6 A 2.9 2.7 Vout - -.5.5.5 2 - -2 2 4 6 8 Figure 3: Step response Figure 4: Step response 8 3.6 i no (μa/hz ½ ) Primary Voltage VP (V) 6 4 2-2 -4-6 2 kv/μs ref V p V ref 3.4 3...E+.E+2.E+3.E+4.E+5.E+6.E+7 Frequency (Hz) -8-2 3 4 5 Figure 5: Input referred ouput noise current spectral density Figure 6: dv/dt Page 8/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Typical performance characteristics CKSR 5-NP Linearity error (% of N)..5 -.5 -. -5 5 (A) Relative Sensitivity (db).8.6.4.2 -.2 -.4 -.6 -.8 - Relative Sensitivity Phase = 5 A - -2-3 -4-5 -6-7 -8-9 Frequency (Hz) Phase ( ) Figure 7: Linearity error Figure 8: Frequency response 7.5 7.5 5 3. 5 3. 3. 3. (A) IP 7.5 5 = 5 A Vout 2.9 2.7 IP (A) 7.5 5 = 5 A Vout 2.9 2.7 - -.5.5.5 2 - -2 2 4 6 8 Figure 9: Step response Figure : Step response 8 3.6 i no (μa/hz ½ )..E+.E+2.E+3.E+4.E+5.E+6.E+7 Frequency (Hz) Primary Voltage VP (V) 6 4 2-2 -4-6 -8 2 kv/μs - 2 3 4 5 V p Vref 3.4 3. Figure : Input referred ouput noise current spectral density Figure 2: dv/dt Page 9/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Typical performance characteristics CKSR 25-NP Linearity error (% of N)..5 -.5 -. -25 25 (A) Figure 3: Linearity error Relative Sensitivity (db).8.6.4.2 -.2 -.4 -.6 -.8 - Relative Sensitivity Phase Frequency (Hz) Figure 4: Frequency response = 25 A - -2-3 -4-5 -6-7 -8-9 Phase ( ) IP (A) 29.2 25. 6.7 8.3 4.2 = 25 A. -4.2 -.5.5.5 2 Figure 5: Step response 3. 3. 2.9 2.7 IP (A) 29.2 25. 3. 3. 6.7 8.3 4.2. -4.2 = 25 A -2 2 4 6 8 Figure 6: Step response Vout 2.9 2.7 8 3.6 i no (μa/hz ½ ) Primary Voltage VP (V) 6 4 2-2 -4-6 2 kv/μs VP Vout Vref 3.4 3...E+.E+2.E+3.E+4.E+5.E+6.E+7 Frequency (Hz) -8-2 3 4 5 Figure 7: Input referred ouput noise current spectral density Figure 8: dv/dt Page /9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Typical performance characteristics CKSR 5-NP Linearity error (% of N)..5 -.5 -. -5 5 (A) Figure 9: Linearity error Relative Sensitivity (db).8.6.4.2 -.2 -.4 -.6 -.8 - Relative Sensitivity Phase Frequency (Hz) Figure 2: Frequency response = 5 A - -2-3 -4-5 -6-7 -8-9 Phase ( ) 58.3 58.3 IP (A) 5. 4.7 33.3 25. 6.7 8.3. -8.3 = 5 A -.5.5.5 2 3. 3. 2.9 2.7 I (A) 5. 4.7 33.3 25. 6.7 8.3. -8.3 Vout I V = 5 A -2 2 4 6 8 Vout 3. 3. 2.9 2.7 Figure 2: Step response Figure 22: Step response i no (μa/hz ½ )..E+.E+2.E+3.E+4.E+5.E+6.E+7 Frequency (Hz) Primary Voltage VP (V) 8 6 4 2-2 -4-6 -8 2 kv/μs - 2 3 4 5 V P Vout Vref 3.6 3.4 3. Figure 23: Input referred ouput noise current spectral density Figure 24: dv/dt Page /9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Maximum continuous DC primary current (A) 4 35 3 25 2 5 5 CKSR 6-NP 2 4 6 8 2 (A) 9 8 7 6 5 4 3 2 CKSR 5-NP 2 4 6 8 2 T A ( C) T A ( C) Figure 25: vs T A for CKSR 6-NP Figure 26: vs T A for CKSR 5-NP (A) 9 8 7 6 5 4 3 2 CKSR 25-NP 2 4 6 8 2 (A) 6 4 2 8 6 4 2 CKSR 5-NP 2 4 6 8 2 T A ( C) T A ( C) Figure 27: vs T A for CKSR 25-NP Figure 28: vs T A for CKSR 5-NP The maximum continuous DC primary current plot shows the boundary of the area for which all the following conditions are true: < M Junction temperature T J < 25 C Primary conductor temperature < C Resistor power dissipation <.5 rated power Frequency derating.25 AC Derating max rms AC current / max DC current.75.5.25 k k k M f (Hz) Figure 29: Maximum rms AC primary current / maximum DC primary current vs frequency Page 2/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Performance parameters definition Ampere-turns and amperes The transducer is sensitive to the primary current linkage Θ P (also called ampere-turns). Θ P =N P (At) Where N P the number of primary turn (depending on the connection of the primary jumpers) Caution: As most applications will use the transducer with only one single primary turn (N P = ), much of this datasheet is written in terms of primary current instead of current linkages. However, the ampere-turns (At) unit is used to emphasis that current linkages are intended and applicable. Transducer simplified model The static model of the transducer at temperature T A is: = G Θ P + ε In which ε = V OE + V OT (T A ) + ε G Θ P G + ε L (Θ P max ) Θ P max G + TCG (T A 25) Θ P G With: Θ P = N P :the input ampere-turns (At) Please read above warning. Θ P max :the maxi input ampere-turns that have been applied to the transducer (At) :the secondary voltage (V) T A :the ambient temperature ( C) V OE :the electrical offset voltage (V) V OT (T A ) :the temperature variation of V O at temperature T A (V) G :the sensitivity of the transducer (V/At) ε G :the sensitivity error ε L (Θ P max ) :the linearity error for Θ P max This model is valid for primary ampere-turns Θ P between Θ P max and +Θ P max only. Definition of typical, minimum and maximum values Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown in typical graphs. On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower limits and a probability for measured values to lie within this interval. Unless otherwise stated (e.g. % tested ), the LEM definition for such intervals designated with min and max is that the probability for values of samples to lie in this interval is 99.73 %. For a normal (Gaussian) distribution, this corresponds to an interval between 3 sigma and +3 sigma. If typical values are not obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to an interval between sigma and +sigma for a normal distribution. Typical, minimum and maximum values are determined during the initial characterization of the product. Sensitivity and linearity To measure sensitivity and linearity, the primary current (DC) is cycled from to, then to and back to (equally spaced / steps). The sensitivity G is defined as the slope of the linear regression line for a cycle between ±N. The linearity error ε L is the maximum positive or negative difference between the measured points and the linear regression line, expressed in % of N. Magnetic offset The magnetic offset current I OM is the consequence of a current on the primary side ( memory effect of the transducer s ferromagnetic parts). It is included in the linearity figure but can be measured individually. It is measured using the following primary current cycle. I OM depends on the current value ( > N ). A - I OM (DC) V = t ) V 2 ( out out 2 ( t ) G th Figure 3: Current cycle used to measure magnetic and electrical offset (transducer supplied) t t 2 t Page 3/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Performance parameters definition (continued) Electrical offset The electrical offset voltage V OE can either be measured when the ferro-magnetic parts of the transducer are: completely demagnetized, which is difficult to realize, or in a known magnetization state, like in the current cycle shown in figure 3. Using the current cycle shown in figure 3, the electrical offset is: V V OE = out ( t ) + V ( t ) out 2 2 The temperature variation V OT of the electrical offset voltage V OE is the variation of the electrical offset from 25 C to the considered temperature: V OT (T) = V (T) V (25 C) OE OE Note: the transducer has to be demagnetized prior to the application of the current cycle (for example with a demagnetization tunnel). Overall accuracy The overall accuracy at 25 C X G is the error in the N +N range, relative to the rated value N. It includes: the electrical offset V OE the sensitivity error ε G the linearity error ε L (to N ) The magnetic offset is part of the overall accuracy. It is taken into account in the linearity error figure provided the transducer has not been magnetized by a current higher than N. Response and reaction times The response time t r and the reaction time t ra are shown in figure 32. Both depend on the primary current di/dt. They are measured at nominal ampere-turns. I % 9 % I p V out U C t r R M Vref % t ra t Figure 3: Test connection Figure 32: Response time t r and reaction time t ra Page 4/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Application information Filtering and decoupling Supply voltage U C The fluxgate oscillator draws current pulses of up to 3 ma at a rate of ca. 9 khz. Significant 9 khz voltage ripple on U C can indicate a power supply with high impedance. At these frequencies the power supply rejection ratio is low, and the ripple may appear on the transducer output and reference V ref. The transducer has internal decoupling capacitors, but in the case of a power supply with high impedance, it is advised to provide local decoupling ( nf or more, located close to the transducer) Reference V ref Ripple present on the reference output can be filtered with a low value of capacitance because of the internal 68 Ohm series resistance. The maximum filter capacitance value is µf. U C Output The output has a very low output impedance of typically 2 Ohms; it can drive pf directly. Adding series Rf = Ohms allows much larger capacitive loads. Empirical evaluation may be necessary to obtain optimum results. The minimum load resistance on is kohm. Total Primary Resistance The primary resistance is.72 mω per conductor. In the following table, examples of primary resistance according to the number of primary turns. R M Vref Number of primary turns Primary resistance R P [mω].8 2.72 4 8 Recommended connections 9 8 7 6 out in 2 3 4 5 9 8 7 6 out in 2 3 4 5 9 8 7 6 out in 2 3 4 5 Page 5/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

External reference voltage If the Ref pin of the transducer is not used it could be either left unconnected or filtered according to the previous paragraph Reference V ref. The Ref pin has two modes Ref IN and Ref OUT: In the Ref OUT mode the V internal precision reference is used by the transducer as the reference point for bipolar measurements; this internal reference is connected to the Ref pin of the transducer through a 68 Ohms resistor. it tolerates sink or source currents up to ±5 ma, but the 68 Ohms resistor prevents this current to exceed these limits. In the Ref IN mode, an external reference voltage is connected to the Ref pin; this voltage is specified in the range to 4 V and is directly used by the transducer as the reference point for measurements. The external reference voltage V ref must be able: - either to source a typical current of - or to sink a typical current of Application information (continued) Vref, the maximum value will be 2.2 ma typ. when V ref = 4 V. 68 Vref 68, the maximum value will be 3.68 ma typ. when V ref = V. The following graphs show how the measuring range of each transducer version depends on the external reference voltage value V ref. (A) 5 4 3 2 - -2-3 -4 CKSR 6-5 2 3 4 V ref (V) (A) 8 6 4 2-2 -4-6 -8 CKSR 5-2 3 4 V ref (V) Upper limit: = 9.6 * V ref + 44.4 (V ref = 4 V) Upper limit: = 24 * V ref + (V ref =.29 4 V) Upper limit: = 8 (V ref =.29 V) Lower limit: = 9.6 * V ref + 3.6 (V ref = 4 V) Lower limit: = 24 * V ref + 9 (V ref = 3.7 V) Lower limit: = 8 (V ref = 3.7 4 V) Page 6/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

External reference voltage (continued) (A) 8 6 4 2-2 -4-6 -8 - CKSR 25 2 3 4 V ref (V) (A) 2 5 5-5 - -5-2 CKSR 5 2 3 4 V ref (V) Upper limit: = 4 * V ref + 85 (V ref = 4 V) Upper limit: = 8 * V ref + 37 (V ref = 2.75 4 V) Upper limit: = 85 (V ref = V) Upper limit: = 5 (V ref = 2.75 V) Lower limit: = 4 * V ref + 5 (V ref = V) Lower limit: = 8 * V ref + 3 (V ref = 2.25 V) Lower limit: = 85 (V ref = 4 V) Lower limit: = 5 (V ref = 2.25 4 V) Example with V ref =.65 V: The 6 A version has a measuring range from 2.24 A to +28.5 A The 5 A version has a measuring range from 3.6 A to +7.4 A The 25 A version has a measuring range from 5 A to +85 A The 5 A version has a measuring range from 2 A to +5 A Example with V ref = V: The 6 A version has a measuring range from +3.6 A to +44.4 A The 5 A version has a measuring range from +9 A to +8 A The 25 A version has a measuring range from +5 A to +85 A The 5 A version has a measuring range from +3 A to +5 A Page 7/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

PCB footprint Assembly on PCB Recommended PCB hole diameter.3 mm for primary pin.8 mm for secondary pin Maximum PCB thickness mm Wave soldering profile maximum 26 C for s No clean process only. Safety This transducer must be used in limited-energy secondary circuits according to IEC 6-. This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer s operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage.this transducer is a build-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. Page 8/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

Dimensions (in mm. General linear tolerance ±.25 mm) Connection U C R M Vref Page 9/9 2December25/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com