WSMS3124 www.vishay.com Vishay Dale Power Metal Strip® Meter Shunt Resistor Very Low Value (down to 0.0001 Ω) FEATURES • High power to resistor size ratio • 5-terminal connection design • Use for single or multi-phase energy meters • Proprietary processing technique produces extremely low resistance values • All welded construction • Very low inductance (< 5 nH) • Low thermal EMF (< 3 μV/°C) • Material categorization: For definitions please see www.vishay.com/doc?99912 STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE POWER RATING P70 °C W TOLERANCE % RESISTANCE VALUE RANGE Ω RESISTANCE VALUES CURRENTLY AVAILABLE (1) Ω WEIGHT (typical) G WSMS3124 3124 3.0 5.0 100μ to 750μ 100μ, 200μ, 400μ 4.3 Note (1) Other values may be available, contact factory TECHNICAL SPECIFICATIONS PARAMETER UNIT Temperature Coefficient RESISTOR CHARACTERISTICS ppm/°C ± 75 Operating Temperature Range °C - 65 to + 170 Maximum Current Rating A (P/R)1/2 GLOBAL PART NUMBER INFORMATION GLOBAL PART NUMBERING EXAMPLE: WSMS3124L1000JK (WSMS3124, 0.0001 Ω, ± 5 %) W S M S 3 1 2 4 L 1 0 0 0 J K GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSMS3124 L = mΩ L1000 = 0.00010 Ω L2000 = 0.00020 Ω L4000 = 0.00040 Ω J = ± 5.0 % K = Bulk pack E = Tape and reel (Dash number) (Up to 2 digits) From 1 to 99 as applicable Revision: 09-Mar-12 Document Number: 30173 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 WSMS3124 www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) 0.130 (3.3) 0.427 (10.85) 0.512 0.060 typ. (1.5) 0.060 (1.5) 0.564 (14.3) 0.973 (24.7) 0.157 (4) 0.110 (2.8) 0.226 (5.74) 0.070 (1.78) 0.040 (1.0) Ø 0.250 (6.35) 0.787 (20) 1.195 (30.35) 0.204 (5.2) Rated Power in % DERATING 120 TOLERANCES ON DECIMALS XXX ± 0.005 100 80 60 40 RESISTANCE VALUE (μΩ) RESISTOR ELEMENT THICKNESS (inches) ELEMENT LENGTH ELEMENT MATERIAL 100 0.038 0.090 Mn-Cu 200 0.040 0.180 Mn-Cu 400 0.035 0.090 Ni-Cu 20 0 - 65 - 50 - 25 0 25 50 75 100 125 150 170 Ambient Temperature in °C 70 PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal Shock - 55 °C to + 150 °C, 1000 cycles, 15 min at each extreme ± 0.5 % ΔR ± 0.5 % ΔR Short Time Overload 5 x rated power for 5 s Low Temperature Operation - 65 °C for 45 min ± 0.5 % ΔR High Temperature Exposure 1000 h at + 170 °C ± 1.0 % ΔR Bias Humidity + 85 °C, 85 % RH, 10 % bias, 1000 h ± 0.5 % ΔR Mechanical Shock 100 g’s for 6 ms, 5 pulses ± 0.5 % ΔR Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h ± 0.5 % ΔR Load Life 1000 h at + 70 °C, 1.5 h “ON”, 0.5 h “OFF” ± 1.0 % ΔR Moisture Resistance MIL-STD-202, method 106, 0 % power, 7b not required ± 0.5 % ΔR Revision: 09-Mar-12 Document Number: 30173 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Legal Disclaimer Notice www.vishay.com 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. 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