WSLT3921 and WSLT5931 Vishay Dale Power Metal Strip® Resistors, High Temperature (275 °C) Low Value (down to 0.001 Ω), Surface Mount FEATURES • Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments and power amplifiers RoHS COMPLIANT • Proprietary processing technique produces extremely low resistance values, down to 0.001 Ω • Specially selceted and stabilized materials allow for high temperature derating (to + 275 °C) • All welded construction • Solid metal nickel-chrome alloy resistive element with low TCR (< 20 ppm/°C) • Very low inductance (< 5 ηH) • Excellent frequency response to 50 MHz • Low thermal EMF (< 3 µV/°C) STANDARD ELECTRICAL SPECIFICATIONS POWER RATING P70 °C TOLERANCE % RESISTANCE VALUES AVAILABLE mΩ WEIGHT (typical) g/1000 pieces WSLT3921 3.0 1.0 and 5.0 2, 3, 4 281 WSLT5931 5.0 1.0 and 5.0 1, 2, 3 398 GLOBAL MODEL Note • Part Marking: no part marking on these parts TECHNICAL SPECIFICATIONS PARAMETER UNIT WSLT3921 AND WSLT5931 ppm/°C ± 75 Operating Temperature Range °C - 65 to + 275 Maximum Working Voltage A (P/R)1/2 Temperature Coefficient GLOBAL PART NUMBER INFORMATION GLOBAL PART NUMBERING: WSLT39212L000FEA 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 WSLT5931 L = mΩ 2L000 = 0.002 Ω F = ± 1.0 % J = ± 5.0 % EA = Lead (Pb)-free, tape/reel EK = Lead (Pb)-free, bulk Reserved for future specials www.vishay.com 18 For technical questions, contact: [email protected] Document Number: 30136 Revision: 03-Dec-07 WSLT3921 and WSLT5931 Power Metal Strip® Resistors, High Temperature (275 °C) Low Value (down to 0.001 Ω), Surface Mount Vishay Dale DIMENSIONS DIMENSIONS in inches [millimeters] MODEL L H D L W T 0.020 [0.5] 0.080 ± 0.010 [2.00 ± 0.254] WSLT3921 0.394 ± 0.010 0.205 ± 0.010 [10.0 ± 0.254] [5.20 ± 0.254] WSLT5931 0.591 ± 0.010 0.305 ± 0.010 0.020 0.157 ± 0.010 ± 0.010 [15.0 ± 0.254] [7.75 ± 0.254] [0.5] [4.00 ± 0.254] W T SOLDER PAD DIMENSIONS in inches [millimeters] MODEL I d b L WSLT3921 0.106 ± 0.010 [2.70 ± 0.254] 0.244 ± 0.010 [6.20 ± 0.254] 0.220 ± 0.005 [5.60 ± 0.13] WSLT5931 0.205 ± 0.010 [5.20 ± 0.254] 0.344 ± 0.010 [8.75 ± 0.254] 0.220 ± 0.005 [5.60 ± 0.13] 80 GLOBAL MODEL RESISTANCE VALUE mΩ “D” THICKNESS ELEMENT MATERIAL 60 WSLT3921 2.0 0.0270 Fe-Cr WSLT3921 3.0 0.0170 Fe-Cr WSLT3921 4.0 0.0130 Fe-Cr WSLT5931 1.0 0.0330 Fe-Cr WSLT5931 2.0 0.0155 Fe-Cr WSLT5931 3.0 0.0105 Fe-Cr b d Rated Power in % H 120 100 40 20 0 - 65 - 25 25 Derating 75 70 125 175 225 275 Ambient Temperature in °C PERFORMANCE TEST CONDITIONS OF TEST Thermal Shock TEST LIMITS ± (1.0 % + 0.0005 Ω) ΔR - 55 °C to + 150 °C, 1000 cycles, 15 min at each extreme Short Time Overload 5 x rated power for 5 s ± (0.5 % + 0.0005 Ω) ΔR Low Temperature Storage - 65 °C for 45 min ± (0.5 % + 0.0005 Ω) ΔR High Temperature Exposure 1000 h at + 275 °C ± (1.0 % + 0.0005 Ω) ΔR Bias Humidity + 85 °C, 85 % RH, 10 % Bias, 1000 h ± (0.5 % + 0.0005 Ω) ΔR Mechanical Shock 100 g’s for 6 ms, 5 pulses ± (0.5 % + 0.0005 Ω) ΔR Vibration Frequency varied 10 to 2000 Hz in 1 min, 3 directions, 12 h ± (0.5 % + 0.0005 Ω) ΔR Load Life 1000 h at 70 °C, 1.5 h “ON”, 0.5 h “OFF” ± (1.0 % + 0.0005 Ω) ΔR Resistance to Solder Heat 260 °C Solder, 10 - 12 s dwell, 25 mm/s emergence ± (0.5 % + 0.0005 Ω) ΔR Moisture Resistance MIL-STD-202, Method 106, 0 % power, 7a and 7b not required ± (0.5 % + 0.0005 Ω) ΔR PACKAGING MODEL REEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSLT3921 16 mm/embossed plastic 330 mm/13" 3000 EA WSLT5931 16 mm/embossed plastic 330 mm/13" 1500 EA Note • Embossed carrier tape per EIA-481-2 Document Number: 30136 Revision: 03-Dec-07 For technical questions, contact: [email protected] www.vishay.com 19 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. 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 herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. 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. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1