Power Metal Film Leaded Resistors

Transcription

1 PR, PR, PR3 Power Metal Film Leaded Resistors FEATURES High power in small packages ( W / 7 size to 3 W / 67 size) Defined fusing characteristics Technology: metal film Meets active and passive flammability requirements as defined in IEC 65- AEC-Q qualified (PR and PR) Material categorization: for definitions of compliance please see DESCRIPTION A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper or copper-clad iron are welded to the end-caps. The resistors are coated with a red, non-flammable lacquer which provides electrical, mechanical and climatic protection. This coating is not resistant to aggressive fluxes and cleaning solvents. The encapsulation is resistant to all cleaning solvents in accordance with IEC APPLICATIONS All general purpose power applications Automotive electronics Lighting ballast TECHNICAL SPECIFICATIONS DESCRIPTION PR PR Cu-lead Notes () R value is measured with probe distance of 4 mm ± mm using 4-terminal method () % tolerance is available for R n -range from upwards PR FeCu-lead PR3 Cu-lead PR3 FeCu-lead DIN size Resistance range (). to M.33 to M to M.68 to M to M Resistance tolerance () ± %; ± 5 % ± %; ± 5 % ± %; ± 5 % ± %; ± 5 % ± %; ± 5 % Temperature coefficient ± 5 ppm/k ± 5 ppm/k ± 5 ppm/k ± 5 ppm/k ± 5 ppm/k Rated dissipation, P 7 R W W.3 W 3 W.5 W R <.6 W. W -.6 W - Thermal resistance (R th ) 35 K/W 75 K/W 5 K/W 6 K/W 75 K/W Operating voltage, U max. AC/DC 35 V 5 V 5 V 75 V 75 V E-series E4, E96 (± %); E4 (± 5 %) Basic specification IEC 65- Stability after: Endurance test ( h, P 7 ) R max.: ± (5 % R +. ) Damp heat test (56 days) R max.: ± (3 % R +. ) Soldering ( s, 6 C) R max.: ± ( % R +.5 ) Revision: 7-Nov-7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

2 PR, PR, PR3 TERMINATION WIRE TYPES PRODUCT TYPE PACKAGING CODE STYLE MATERIAL WIRE DIAMETER PITCH A, A5, R5 Axial Cu.58 mm n/a N4 Radial Cu.58 mm 4.8 mm PR L Radial Cu.58 mm 7.8 mm L Radial FeCu.58 mm 7.8 mm K Radial FeCu.58 mm.5 mm A, R5 Axial Cu.78 mm n/a A Axial FeCu.58 mm n/a PR N3, R Radial Cu.78 mm 4.8 mm L Radial Cu.78 mm 7.8 mm L Radial FeCu.58 mm 7.8 mm B Radial FeCu.78 mm 5 mm AC Axial Cu.78 mm n/a AC Axial FeCu.58 mm n/a PR3 DC Radial Cu.78 mm 5.4 mm DC Radial FeCu.58 mm 5.4 mm PC Radial FeCu.78 mm mm APPLICATION INFORMATION The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heat flow support of the printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded. Furthermore, a high level of ambient temperature or of power dissipation may raise the temperature of the solder joint, hence special solder alloys or board materials may be required to maintain the reliability of the assembly. These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime. The designer may estimate the performance of the particular resistor application or set certain load and temperature limits in order to maintain a desired stability. OPERATION MODE POWER Rated dissipation PR PR PR3 3 W Applied maximum film temperature, F max. 5 C PR. to M Max. resistance change at rated dissipation for resistance range: PR.33 to M PR3.68 to M R/R max. (at P 7 ) after: h 5. % R +. P 7 W W Revision: 7-Nov-7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

3 PR, PR, PR3 PART NUMBER AND PRODUCT DESCRIPTION Part Number: PRJA P R J A TYPE/SIZE VARIANT WIRE TYPES TCR/MATERIAL RESISTANCE TOLERANCE PACKAGING SPECIAL PR PR PR3 = neutral Z = value overflow (special) = Cu.58 (PR) = Cu.78 (PR, PR3) 3 = FeCu.58 (PR, PR, PR3) 4 = FeCu.78 (PR, PR3) = standard 3 digit value digit multiplier Multiplier 7 = * -3 8 = * - 9 = * - = * = * = * 3 = * 3 4 = * 4 F = ± % J = ± 5 % Product Description: PR 5 % A K PR 5 % A K N4 N3 A5 A AC R5 R L DC K B PC = standard TYPE TOLERANCE PACKAGING RESISTANCE VALUE PR PR PR3 % 5 % N4 N3 A5 A AC R5 R L DC K B PC K = k 4K75 = 4.75 k Note The products can be ordered using either the PRODUCT DESCRIPTION or the PART NUMBER PACKAGING PRODUCT TYPE PR PR PR3 CODE QUANTITY DESCRIPTION PITCH TAPE WIDTH DIMENSION A5 5 Ammo pack acc. to IEC mm 5 mm 75 mm x 4 mm x 6 mm A Ammo pack acc. to IEC mm 5 mm 78 mm x 3 mm x 6 mm N4 4 Ammo pack acc. to IEC mm x 6 mm x 33 mm L Loose in bulk mm x 7 mm x 5 mm K Loose in bulk mm x 7 mm x 5 mm R5 5 Reel pack acc. to IEC mm 5 mm 93 mm x 3 mm x 98 mm A Ammo pack acc. to IEC mm 5 mm 7 mm x 6 mm x 58 mm N3 3 Ammo pack acc. to IEC mm x 6 mm x 33 mm L Loose in bulk mm x 7 mm x 5 mm B Loose in bulk mm x 7 mm x 5 mm R5 5 Reel pack acc. to IEC mm 5 mm mm x 375 mm x 375 mm R Reel pack acc. to IEC mm x 375 mm x 375 mm AC 5 Ammo pack acc. to IEC 686- mm 63 mm 83 mm x 58 mm x 56 mm DC 5 Loose in bulk mm x 7 mm x 5 mm PC 5 Loose in bulk mm x 7 mm x 5 mm Revision: 7-Nov-7 3 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

4 DESCRIPTION Production is strictly controlled and follows an extensive set of instructions established for reproducibility. A homogeneous film of metal alloy is deposited on a high grade ceramic body and conditioned to achieve the desired temperature coefficient. Plated steel termination caps are firmly pressed on the metalized rods. Mostly, a special laser is used to achieve the target value by smoothly cutting a helical groove in the resistive layer without damaging the ceramics. Connecting wires of electrolytic copper plated with % pure tin are welded to the termination caps. The resistor elements are covered by a red, non-flammable lacquer protective coating designed for electrical, mechanical, and climatic protection. Four or five color code rings designate the resistance value and tolerance in accordance with IEC 66. The result of the determined production is verified by an extensive testing procedure performed on % of the individual resistors. Only accepted products are stuck directly on the adhesive tapes in accordance with IEC 686- or for the radial versions in accordance to IEC MATERIALS Vishay acknowledges the following systems for the regulation of hazardous substances: IEC 6474, Material Declaration for Products of and for the Electrotechnical Industry, with the list of declarable substances given therein () The Global Automotive Declarable Substance List (GADSL) () The REACH regulation (97/6/EC) and the related list of substances with very high concern (SVHC) (3) for its supply chain The products do not contain any of the banned substances as per IEC 6474, GADSL, or the SVHC list, see Hence the products fully comply with the following directives: /53/EC End-of-Life Vehicle Directive (ELV) and Annex II (ELV II) /65/EU Restriction of the Use of Hazardous Substances Directive (RoHS) with amendment 5/863/EU /9/EU Waste Electrical and Electronic Equipment Directive (WEEE) Vishay pursues the elimination of conflict minerals from its supply chain, see the Conflict Minerals Policy at PR, PR, PR3 ASSEMBLY The resistors are suitable for processing on automatic insertion equipment and cutting and bending machines. Excellent solderability is proven, even after extended storage. They are suitable for automatic soldering using wave or dipping. The resistors are completely lead (Pb)-free, the pure tin plating provides compatibility with lead (Pb)-free and lead-containing soldering processes. The immunity of the plating against tin whisker growth, in compliance with IEC , has been proven under extensive testing. The encapsulant is resistant to cleaning solvent specified in IEC 65-. The suitability of conformal coatings, if applied, shall be qualified by appropriate means to ensure the long-term stability of the whole system. RELATED PRODUCTS For a correlated range of Metal Film Resistors see the datasheet: High Ohmic / High Voltage Metal Film Leaded Resistors, For product that offers high power dissipation and metal oxide film technology see the datasheet: High Power Metal Oxide Leaded Resistors, Notes () The IEC 6474 list of declarable substances is maintained in a dedicated database, which is available at () The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council, and available at (3) The SVHC list is maintained by the European Chemical Agency (ECHA) and available at Revision: 7-Nov-7 4 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

5 PR, PR, PR3 FUNCTIONAL PERFORMANCE The power that the resistor can dissipate depends on the operating temperature. Power in % Ambient Temperature in C Derating Maximum dissipation (P max. ) in percentage of rated power as a function of the ambient temperature (T amb ) 5 Δ T 4 5 mm ΔT mm mm mm Ø.58 mm Cu-leads Minimum distance from resistor body to PCB = mm PR Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting Ø.58 mm FeCu-leads Minimum distance from resistor body to PCB = mm PR Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. 7 Δ T mm Δ T 8 5 mm 4 mm 6 mm 3 4 Ø.58 mm FeCu-leads Minimum distance from resistor body to PCB = mm PR Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. Ø.78 mm Cu-leads Minimum distance from resistor body to PCB = mm PR Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. Revision: 7-Nov-7 5 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

6 PR, PR, PR3 8 ΔT 6 5 mm mm Δ T 8 5 mm 6 mm Ø.78 mm FeCu-leads Minimum distance from resistor body to PCB = mm PR Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. 3 Ø.78 mm Cu-leads Minimum distance from resistor body to PCB = mm PR3 Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. 8 Δ T mm 8 ΔT 5 mm 6 5 mm 6 4 mm 4 mm 3 Ø.58 mm FeCu-leads Minimum distance from resistor body to PCB = mm PR3 Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting Ø.78 mm FeCu-leads Minimum distance from resistor body to PCB = mm PR3 Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting. Revision: 7-Nov-7 6 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

7 PR, PR, PR3 ΔT ΔT Ø.58 mm Cu-leads PR Hot-spot temperature rise (T) as a function of dissipated power Ø.58 mm FeCu-leads PR Hot-spot temperature rise (T) as a function of dissipated power. 6 Δ T 6 ΔT Ø.78 mm Cu-leads. Ø.78 mm FeCu-leads PR Hot-spot temperature rise (T) as a function of dissipated power. PR Hot-spot temperature rise (T) as a function of dissipated power. 6 Δ T Δ T Ø.58 mm FeCu-leads Ø.58 mm FeCu-leads PR Hot-spot temperature rise (T) as a function of dissipated power. PR3 Hot-spot temperature rise (T) as a function of dissipated power. Revision: 7-Nov-7 7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

8 PR, PR, PR3 T 6 ΔT Ø.78 mm Cu-leads Ø.78 mm FeCu-leads PR3 Hot-spot temperature rise (T) as a function of dissipated power. PR3 Hot-spot temperature rise (T) as a function of dissipated power. Revision: 7-Nov-7 8 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

9 PR, PR, PR3 The maximum permissible hot-spot temperature is 5 C for PR, C for PR and 5 C for PR3.. P (W) Tamb = 4 C 7 C C 5 C 55 C h h h < kω < 3 kω > 3 kω Tm ( C) 5 C % ΔR PR Drift nomogram. P (W).5..5 Tamb = 4 C 7 C C 5 C 55 C h h h < kω < 39 kω > 39 kω Tm ( C) C % ΔR PR Drift nomogram 3. P (W) Tamb = 4 C 7 C C 5 C 55 C h h h < kω 5 kω > 5 kω Tm ( C) 5 C % ΔR PR3 Drift nomogram Revision: 7-Nov-7 9 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

10 PR, PR, PR3 3 P max. (W) t p / t i = t i PR Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max.) as a function of pulse duration (t i ) U max. (V) t i PR Pulse on a regular basis; maximum permissible peak pulse voltage (Û max. ) as a function of pulse duration (t i ) 3 P max. (W) t p / t i = t i PR Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max.) as a function of pulse duration (t i ) Revision: 7-Nov-7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

11 PR, PR, PR3 U max. 7 (V) t i PR Pulse on a regular basis; maximum permissible peak pulse voltage (Û max. ) as a function of pulse duration (t i ) 4 P max. (W) 3 t p / t i = t i PR3 Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max.) as a function of pulse duration (t i ) 4 U max. (V) t i PR3 Pulse on a regular basis; maximum permissible peak pulse voltage (Û max. ) as a function of pulse duration (t i ) Revision: 7-Nov-7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

12 PR, PR, PR3 t t P overload (W) PR Time to interruption as a function of overload power for range:. R n This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications P overload (W) PR Time to interruption as a function of overload power for range: 6 R n 56 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications. t t P overload (W) PR Time to interruption as a function of overload power for range: R n 5 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications P overload (W) PR Time to interruption as a function of overload power for range:.33 R n 5 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications. t t P overload (W) PR Time to interruption as a function of overload power for range: 5 R n 68 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications P overload (W) PR Time to interruption as a function of overload power for range: 68 R n 56 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications. Revision: 7-Nov-7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

13 PR, PR, PR3 t P overload (W) PR3 Time to interruption as a function of overload power for range:.68 R n 56 This graph is based on measured data under constant voltage conditions; the data may deviate according to the applications. Revision: 7-Nov-7 3 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

14 PR, PR, PR3 Z R Rn = Ω Rn = 4 Ω Rn = kω - Rn = kω - - PR Impedance as a function of applied frequency f (MHz) 3 Z R Rn =. Ω Rn = Ω Rn = kω - Rn = 4 kω - - f (MHz) 3 PR Impedance as a function of applied frequency Z R Rn =.5 Ω Rn = 8 Ω Rn =.3 kω - Rn = kω Rn = kω - f (MHz ) 3 PR3 Impedance as a function of applied frequency Revision: 7-Nov-7 4 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

15 PR, PR, PR3 TESTS PROCEDURES AND REQUIREMENTS All tests are carried out in accordance with the following specifications: IEC 65-, generic specification (includes tests) The test and requirements table contains only the most important tests. For the full test schedule refer to the documents listed above. The tests are carried out in accordance with IEC 668--xx test method and under standard atmospheric conditions in accordance with IEC 668-, 5.3. Climatic category LCT / UCT / 56 (rated temperature range: lower category temperature, upper category temperature; damp heat, steady state, test duration: 56 days) is valid. Unless otherwise specified the following values apply: Temperature: 5 C to 35 C Relative humidity: 45 % to 75 % Air pressure: 86 kpa to 6 kpa (86 mbar to 6 mbar). For performing some of the tests, the components are mounted on a test board in accordance with IEC 65-, 4.3. In test procedures and requirements table, only the tests and requirements are listed with reference to the relevant clauses of IEC 65- and IEC 668--xx test methods. A short description of the test procedure is also given. TEST PROCEDURES AND REQUIREMENTS IEC 65- CLAUSE IEC TEST METHOD TEST PROCEDURE REQUIREMENTS PERMISSIBLE CHANGE (R max. ) Visual examination No holes; clean surface; no damage Dimensions (outline) Gauge See Straight and Kinked Dimensions tables Resistance ± 5 % R Insulation resistance Maximum voltage (DC) after min; metal block method R ins min. : 4 M Voltage proof U RMS = U ins ; 6 s No breakdown or flashover Temperature coefficient At ( / -55 / ) C and ( / 55 / ) C ± 5 ppm/k 4.6 (Ua ) (Ub) (Uc) Robustness of terminations Tensile, bending, and torsion No damage R max. : ± (.5 % R +.5 ) 4.7 (Ta) Solderability +35 C; s; solder bath method; SnPb4 +45 C; 3 s; solder bath method; SnAg3Cu.5 Good tinning ( 95 % covered, no visible damage) Good tinning ( 95 % covered, no visible damage) 4.8. (Tb) Resistance to soldering heat Unmounted components (6 ± 5) C; ( ± ) s R max. : ± ( % R +.5 ) (Na) Rapid change of temperature 3 min at -55 C and 3 min at + C; 5 cycles No visual damage PR: R max. : ± ( % R +.5 ) PR: R max. : ± ( % R +.5 ) PR3: R max. : ± ( % R +.5 ) 4. 9 (Eb) Bump 3 x 5 bumps in three directions; 4 g No damage R max. : ± (.5 % R +.5 ) 4. 6 (Fc) Vibration sweep cycles per direction; Hz to Hz;.5 mm or m/s No damage R max. : ± (.5 % R +.5 ) Revision: 7-Nov-7 5 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

16 PR, PR, PR3 TEST PROCEDURES AND REQUIREMENTS IEC 65- CLAUSE IEC TEST METHOD TEST PROCEDURE REQUIREMENTS PERMISSIBLE CHANGE (R max. ) 4.3 Climatic sequence: 4.3. (Ba) Dry heat C; 6 h (Db) Damp heat, cyclic 55 C; 4 h; 9 % to % RH; cycle (Aa) Cold -55 C; h (M) Low air pressure 8.5 kpa; h; 5 C to 35 C R ins min. : 3 M R max. : ± (.5 % R +. ) (Db) Damp heat, cyclic 55 C; 5 days; 95 % to % RH; 5 cycles (Cab) Damp heat (steady state) (4 ± ) C; 56 days; (93 ± 3 )% RH R max. : ± (3 % R +. ) Endurance (at 7 C) U = P 7 x R or U = U max. ;.5 h on;.5 h off; 7 C; h R max. : ± (5 % R +. ) Active flammability Accidental overload test No damage, no flamming of gauze cylinder (Xa) Component solvent resistance Isopropyl alcohol (used in industrial application) +3 C; toothbrush method Marking legible; no visible damage Passive flammability Needle flame test No ignition of product, no ignition of under layer burning time is less than 3 s Revision: 7-Nov-7 6 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

17 PR, PR, PR3 DIMENSIONS D d L Type with straight leads DIMENSIONS - Straight lead type and relevant physical dimensions; see straight leads outline TYPE Ø D MAX. L MAX. L MAX. PR PR PR L TERMINATION WIRE MATERIAL (Cu OR FeCu) AND WIRE DIAMETER (Ø d) MASS (mg) MATERIAL Ø d Cu.58 ±.5 FeCu.58 ±.5 7 Cu.78 ±.5 54 FeCu.58 ± FeCu.78 ± Cu.78 ±.5 9 FeCu.58 ±.5 79 FeCu.78 ±.5 85 P ±.5 Ø D P ±.5 L 8 + L P ± 3 Ø d b S Ø B b ±.7 Type with double kink Dimensions in millimeters DIMENSIONS - Double kink lead type and relevant physical dimensions; see double kinked outline TYPE Ø D MAX. L MAX. L MAX. PR PR PR TERMINATION WIRE MATERIAL (Cu OR FeCu) AND WIRE DIAMETER (Ø d) MATERIAL Ø d Cu.58 ±.5 FeCu.58 ±.5 FeCu.58 ±.5 Cu.78 ±.5 FeCu.58 ±.5 FeCu.78 ±.5 Cu.78 ±.5 FeCu.58 ±.5 FeCu.78 ±.5 MASS (mg) Revision: 7-Nov-7 7 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT PITCH P 7.8 ±.5.5 ± ± ± ±.5 5. ± ± ±.5. ±.5 P 7.8 ± 3.5 ± ± ± ± 3 5. ± ± ± 3. ± 3 b. +.5 / / / / / / / / / -. b / / / / / / / / / -. S MAX. Ø B.8 ±.7.8 ±.7.8 ±.7. ±.7.8 ±.7. ±.7. ±.7. ±.7. ±.7

18 PR, PR, PR3 PR, PR WITH RADIAL TAPING PR - Height for insertion (max.) = 3 mm P P H H H L L α α F P P α = 3 to 4 D W W DIMENSIONS in millimeters Pitch of components P.7 ±. Feed-hole pitch P.7 ±. Feed-hole centre to lead at topside at the tape P 3.85 ±.5 Feed-hole center to body center P 6.35 ±. Lead spacing F /- Width of carrier tape W 8. ±.5 Minimum hold down tape width W 5.5 Height for insertion (max.) H 3 Lead wire clinch height H 6.5 ±.5 Body to hole center H 9.5 ± Feed-hole diameter D 4. ±. Height for cutting (max.) L. Minimum lead wire (tape portion) shortest lead L.5 a a PR - Height for insertion (max.) = 9 mm P P H H H L L α α F P P α = 3 to 4 D W W DIMENSIONS in millimeters Pitch of components P.7 ±. Feed-hole pitch P.7 ±. Feed-hole centre to lead at topside at the tape P 3.85 ±.5 Feed-hole center to body center P 6.35 ±. Lead spacing F /- Width of carrier tape W 8. ±.5 Minimum hold down tape width W 5.5 Height for insertion (max.) H 9 Lead wire clinch height H 6.5 ±.5 Body to hole center H 9.5 ± Feed-hole diameter D 4. ±. Height for cutting (max.) L. Minimum lead wire (tape portion) shortest lead L.5 a a MARKING The nominal resistance and tolerance are marked on the resistor using four or five colored bands in accordance with IEC 66, marking codes for resistors and capacitors. Revision: 7-Nov-7 8 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

19 PR, PR, PR3 NC INFORMATION FOR HISTORICAL CODING REFERENCE The resistors have a -digit numeric code starting with 3 For 5 % tolerance: The next 7 digits indicate the resistor type and packing The remaining 3 digits indicate the resistance value: - The first digits indicate the resistance value - The last digit indicates the resistance decade For % tolerance: The next 6 digits indicate the resistor type and packing The remaining 4 digits indicate the resistance value: - The first 3 digits indicate the resistance value - The last digit indicates the resistance decade Last Digit of NC Indicating Resistance Decade RESISTANCE DECADE LAST DIGIT. to.9 7 to to to 976 to 9.76 k to 97.6 k 3 to 976 k 4 M 5 NC Example The NC for resistor type PR with Cu leads and a value of 75 with 5 % tolerance, supplied on a bandolier of units in ammopack, is: NC - Resistor Type and Packaging () TYPE LEAD Ø mm TOL. (%) (BANDOLIER) AMMOPACK REEL RADIAL TAPED STRAIGHT LEADS 5 mm 5 mm 63 mm 5 mm RADIAL TAPED 4 UNITS 3 UNITS 5 UNITS UNITS 5 UNITS 5 UNITS UNITS PR Cu Cu.78 PR FeCu Cu.78 PR FeCu Notes Preferred types in bold. () Other packaging versions are available on request. NC - Resistor Type and Packaging TYPE PR PR PR3 LEAD Ø mm TOL. (%) (LOOSE IN BOX) DOUBLE KINK PITCH = 7.8 mm PITCH = 5.4 mm PITCH ()(3)(4) UNITS 5 UNITS UNITS 5 UNITS Cu FeCu () - Cu FeCu FeCu (3) - Cu FeCu FeCu (4) Notes Preferred types in bold. () PR pitch.5 mm. (3) PR pitch 5. mm. (4) PR3 pitch. mm, with reversed kinking direction as opposed to the drawing for the type with double kink figure. Revision: 7-Nov-7 9 Document Number: 879 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT

20 Legal Disclaimer Notice Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, Vishay ), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer s technical experts. Product specifications do not expand or otherwise modify Vishay s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. 7 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED Revision: 8-Feb-7 Document Number: 9