Precision Thin Film Nichrome Chip Resistors

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Adelia Lawson
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1 Resistors Precision Thin Film Precision thin film technology Extended ohmic range 1R 3M Precision to ±0.01% and 5ppm/ Passivated range for superior humidity performance stability and humidity to RoHS compliant Pbfree terminations Electrical Data Standard Range TR (ppm/º) Power (W) Limiting Element Voltage (V) ll parts are Pbfree and comply with EU Directive 2011/65/EU (RoHS2) Ohmic Value Range 1 1% & 0.% 0.01% PF R933K R95K R205K PF R933K 49R912K 5 49R95K 2R1M 4R71M 4R7332K PF R7332K 24R90K 5 24R9K 1R2M 4R72M 4R7511K PF R7511K 24R9200K 5 24R930K 2 24R930K 1R 2M5 4R72M5 4R7511K PF R71M 24R90K 5 24R9K 2 24R9K 1R 2M5 4R72M5 4R71M PF R71M 24R90K 5 24R9K 2 24R9K 1R 3M 4R73M 4R71M PF R71M 24R90K 5 24R90K 1R 3M 4R73M 4R71M PF R71M 24R90K 5 24R90K Note 1: Standard values E24 or E96. Other values may be available by request. Note 2: Higher values available on request.

2 Electrical Data High Power Range Electrical Data High Power Range PF0603H PF0603H PF0805H PF0805H PF1206H PF1206H PF12H PF12H Ohmic Value Range TR Power Limiting Element (ppm/º) Power (W) Voltage Limiting (V) 0.% Ohmic Value Range * TR 0.01% (W) Element (ppm/º) 0.% 0.01% Voltage (V) R7332K 24R90K 4R71M 4R7332K 24R90K R7332K 24R9K 5 4R71M 24R9K 4R7511K R9200K 1R1M 4R7511K 4R7 1M 5 24R930K 4R7511K 24R9200K R71M 4R7511K R71M 24R930K 24R90K 5 4R71M 24R9K 24R90K R9K R71M 24R90K 4R71M 24R90K R9K 5 24R9K Electrical Data Passivated Range 4R71M 24R90K PF20H Ohmic Value Range * TR Power Limiting Element 5 24R9K (ppm/º) (W) Voltage (V) 0.% 0.01% PF12H R2K RK 4R72K 24R92K PF0402P R912K * Standard values E24 or E96. Other values may be available by request. R332K PF0603P R0K Electrical Data Extended High Power Range R800K PF0805P Limiting Ohmic R200K Value Range * TR Power Element R1M PF1206P (ppm/º) 0.1 (W) Voltage 1 0.% 0.01% (V) R0K PF0603X R332KR1M PF20P 0. 1 PF0805X 0. 1 R0KR0K PF1206X R1M PF12P R1M PF12X R0K R0R 4R70R * Standard values E24 or E96. Other values may be available by request. Physical Data Electrical Data Passivated Range Dimensions (mm) & Weight (mg) L W Tmax Wt ± 0.05 TR 0.3 ± 0.05 Power 0.26 Limiting Element 0.12 ± ± 0.05 Ohmic 1 Value Range * ± (ppm/º) ± 0.05 (W) 0.40 Voltage 0.2 (V) ± ± % T ± ± ± ± RK PF0402P 2.0 ± ± ± ± R912K ± ± ± ± L W ± ± ± ± 0.2 R332K PF0603P ± ± ± ± 0.2 Wraparound terminations R0K (3 faces) ± ± ± ± R800K PF0805P R200K onstruction R1M PF1206P thinfilm material is selectively deposited on a 96% alumina substrate together with metallic R0K contacts at each end of the resistor. The unadjusted resistors are heat treated to give the required TR and stability, then a precisely R1M controlled laser trim process adjusts PF20P 0. 1 the resistance value. Epoxy protection is applied and wraparound terminations are added and R0K plated with Nickel then Tin. Each resistor is measured immediately before packing into tape. R1M PF12P Terminations R1M * The Standard chips values are supplied E24 or E96. with Other 0% values may Sn be matte available plated by request. wraparound terminations suitable for soldering.

3 Physical Data Dimensions (mm) and Weight L W T max Wt L W Wraparound terminations (3 faces) T onstruction thinfilm material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor. The unadjusted resistors are heat treated to give the required TR and stability, then a precisely controlled laser trim process adjusts the resistance value. Epoxy protection is applied and wraparound terminations are added and plated with Nickel then Tin. Each resistor is measured immediately before packing into tape. Terminations The chips are supplied with 0% Sn matte plated wraparound terminations suitable for soldering. Performance Data Standard Range onditions 00 hours rated , 90 95%RH 6. x rated Power, or 2 x LEV, for 5 sec 00 hours at 1 5 cycles 55, 1 270, sec 235, 2 sec > tolerance 0603 to 12 0.% 0.3% 0.% hip size 0201, % 0.% tolerance 0603 to 12 0.% Performance Data High Power Range/Extended High Power Range onditions 00 hours rated 70 40, 90 95%RH 6. x rated Power, or 2 x LEV, for 5 sec 00 hours at 5 5 cycles 55, 1 270, sec 235, 2 sec 0.% Performance Data Passivated Range onditions 00 hours rated 70 40, 90 95%RH 6. x rated Power, or 2 x LEV, for 5 sec 00 hours at 1 5 cycles 55, 1 270, sec 235, 2 sec 0603 to %

4 Derating urve The terminations have an electroplated nickel barrier and tin coating. This ensures excellent 'leach' resistance properties and solderability. Packaging PF Resistors are supplied taped and reeled as as per IE Sizes 20 and 12 are in embossed plastic tape. Smaller sizes are in paper tape. pplication Notes PF resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow or wave soldering of wraparound terminations. Wraparound terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the PF can be immersed in the solder bath for 30 seconds at 260. This enables the resistor to be mounted on one side of a printed circuit board and wireleaded components applied on the other side. PF resistors themselves can operate at a maximum temperature of 1 (see performance above) (5 for High Power grades). For soldered resistors, the joint temperature should not exceed 1. This condition is met when the stated power levels at 70 are used.

5 Ordering Procedure This product has two valid part numbers: European (Welwyn) Part Number: PF K54BI (0603, standard, ppm/, 1.54 kilohm ±, Pbfree) P F K 5 4 B I Size Range TR Value Tolerance Termination & Packing PF 0201 Omit for 13 = ±5ppm/ E24 = 3/4 characters L = ±0.01% Pbfree only 0402 Standard 12 = ±ppm/ E96 = 3/4 characters W = ± I = Standard Packing 0603 H = High Power 11 = ±ppm/ R = ohms B = ± 0201, 0402,000/reel 0805 X = Extended R = ±ppm/ K = kilohms = ±0.% 0603 to 12 00/reel 1206 P = Passivated 02 = ±ppm/ M = megohms D = ± 20, /reel 12 F = ±1% T1* to 1206, 12 20, 12 00/reel * Nonstandard; enquire to confirm availability US (IR) Part Number*: PFW0603LF1141BPLT (0603, standard, ppm/, 1.54 kilohm ±, Pbfree) P F W L F B P L T Model Termination TR Value Tolerance Tape Packing PF W0201 LF = Pbfree 13 = ±5ppm/ 3 digits + multiplier T = ±0.01% P = Paper LT = Tape & Reel W0402 (0%Sn) 12 = ±ppm/ R = ohms for = ± (0201 to 12) 0201, 0402,000/reel W = ±ppm/ values <0 ohms B = ± E = Embossed 0603 to 12 00/reel W = ±ppm/ = ±0.% (20, 12) 20, /reel W = ±ppm/ D = ± W12 F = ±1% W20 W12 * pplies only to Standard Range parts.

Precision Thin Film Nichrome Chip Resistors

Precision Thin Film Nichrome Chip Resistors Resistors Precision Thin Film Nichrome hip Resistors Precision thin film technology Extended ohmic range 1R 3M Precision to ±0.01% and 5ppm/ Passivated range for superior humidity performance oad life