WSLT3921, WSLT5931 Vishay Dale Power Metal Strip Resistors, High Temperature (275 C), Low Value (Down to 0.0003 ), Surface Mount FEATURES Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers Proprietary processing technique produces extremely low resistance values, down to 0.0003 Specially selected and stabilized materials allow for high temperature derating (to + 275 C) All welded construction Solid metal iron-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/C) Very low inductance (< 5 H) Low thermal EMF (< 3 V/C) (1) AEC-Q200 qualified available Compliant to RoHS Directive 2002/95/EC Note (1) Flame retardance test may not be applicable to some resistor technologies. STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE VALUE RESISTANCE VALUES WEIGHT GLOBAL TOLERANCE (2) SIZE P RANGE CURRENTLY AVAILABLE (typical) 70 C MODEL % W g/1000 pieces WSLT3921 3921 3.0 1.0, 5.0 0.5 m to 4 m 0.5 m, 1 m, 2 m, 3 m, 4 m 281 WSLT5931 5931 5.0 1.0, 5.0 0.3 m to 3 m 0.3 m, 0.5 m, 1 m, 2 m, 3 m 398 Notes Part marking: No part marking on these parts. (2) Other values may be available, contact factory. TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS Temperature coefficient ppm/C 175 for 0.3 m and 0.5 m, 75 for 1 m to 4 m Operating temperature range C - 65 to + 275 1/2 Maximum working voltage V (P x R) GLOBAL PART NUMBER INFORMATION Global Part Numbering: WSLT39212L000FEA (WSLT3921, 0.002 , 1 %) W S L T 3 9 2 1 2 L 0 0 0 F E A GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSLT3921 L = m F = 1.0 % EA = Lead (Pb)-free, tape/reel Reserved for WSLT5931 2L000 = 0.002 J = 5.0 % EK = Lead (Pb)-free, bulk future specials ** Please see document Vishay Material Category Policy: www.vishay.com/doc 99902 www.vishay.com For technical questions, contact: ww2bresistors vishay.com Document Number: 30136 388 Revision: 18-Nov-10 WSLT3921, WSLT5931 Power Metal Strip Resistors, High Temperature (275 C), Vishay Dale Low Value (Down to 0.0003 ), Surface Mount DIMENSIONS DIMENSIONS in inches (millimeters) MODEL LW H T 0.394 0.010 0.205 0.010 0.020 0.080 0.010 H WSLT3921 D (10.0 0.254) (5.20 0.254) (0.5) (2.00 0.254) 0.591 0.010 0.305 0.010 0.020 0.157 0.010 L W WSLT5931 (15.0 0.254) (7.75 0.254) (0.5) (4.00 0.254) T SOLDER PAD DIMENSIONS in inches (millimeters) MODEL db l 0.106 0.010 0.244 0.010 0.220 0.005 WSLT3921 (2.70 0.254) (6.20 0.254) (5.60 0.13) I 0.205 0.010 0.344 0.010 0.220 0.005 b WSLT5931 (5.20 0.254) (8.75 0.254) (5.60 0.13) d GLOBAL RESISTANCE D THICKNESS ELEMENT MODEL VALUE (m) (inches) MATERIAL DERATING WSLT3921 0.5 0.0300 Mn-Cu 120 WSLT3921 1.0 0.0150 Mn-Cu 100 WSLT3921 2.0 0.0270 Fe-Cr 80 WSLT3921 3.0 0.0170 Fe-Cr 60 WSLT3921 4.0 0.0130 Fe-Cr WSLT5931 0.3 0.0300 Mn-Cu 40 WSLT5931 0.5 0.0180 Mn-Cu 20 WSLT5931 1.0 0.0330 Fe-Cr 0 WSLT5931 2.0 0.0155 Fe-Cr - 65 - 25 25 75 125 175 225 275 Ambient Temperature in C WSLT5931 3.0 0.0105 Fe-Cr 70 PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal shock - 55 C to + 150 C, 1000 cycles, 15 min at each extreme (1.0 % + 0.0005 ) R Short time overload 5 x rated power for 5 s (0.5 % + 0.0005 ) R Low temperature storage - 65 C for 45 min (0.5 % + 0.0005 ) R High temperature exposure 1000 h at + 275 C (1.0 % + 0.0005 ) R Bias humidity + 85 C, 85 % RH, 10 % bias, 1000 h (0.5 % + 0.0005 ) R Mechanical shock 100 gs for 6 ms, 5 pulses (0.5 % + 0.0005 ) R Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h (0.5 % + 0.0005 ) R Load life 1000 h at + 70 C, 1.5 h ON, 0.5 h OFF (1.0 % + 0.0005 ) R Resistance to solder heat + 260 C solder, 10 s to 12 s dwell, 25 mm/s emergence (0.5 % + 0.0005 ) R Moisture resistance MIL-STD-202, method 106, 0 % power, 7a and 7b not required (0.5 % + 0.0005 ) R PACKAGING REEL MODEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSLT3921 16 mm/embossed plastic 330 mm/13 3000 EA WSLT5931 24 mm/embossed plastic 330 mm/13 1500 EA Note Embossed carrier tape per EIA-481. Document Number: 30136 For technical questions, contact: ww2bresistors vishay.com www.vishay.com Revision: 18-Nov-10 389 Rated Power in %