WSMS2908 www.vishay.com Vishay Dale Power Metal Strip® Meter Shunt Resistor, Very Low Value (down to 0.0001 ) 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) • AEC-Q200 qualified • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE POWER RATING P70 °C W TOLERANCE % RESISTANCE VALUE RANGE RESISTANCE VALUES CURRENTLY AVAILABLE (1) WEIGHT (typical) g/1000 pieces WSMS2908 2908 3.0 5.0 50μ to 1000μ 100μ, 250μ, 300μ, 430μ, 500μ 2100 Note (1) Other values may be available, contact factory TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS ppm/°C ± 1100 for 100 μ, ± 300 for 250 μ, ± 225 for 300 μ, ± 175 for 430 μ and 500 μ Operating temperature range °C -65 to +170 Maximum current rating A (P/R)1/2 Temperature coefficient GLOBAL PART NUMBER INFORMATION GLOBAL PART NUMBERING: WSMS2908L1000JE (WSMS2908, 0.00025 , ± 5 %) W S M S 2 9 0 8 L 1 0 0 0 J E GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSMS2908 L = m L1000 = 0.00010 L2500 = 0.00025 L3000 = 0.00030 L4300 = 0.00043 L5000 = 0.00050 J = ± 5.0 % K = bulk pack E = tape and reel (Dash number) (Up to 2 digits) From 1 to 99 as applicable Revision: 24-Mar-16 Document Number: 30160 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 WSMS2908 www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) 0.157 (4.0) 0.453 (11.5) 0.142 (3.6) 0.059 (1.5) 0.118 (3.0) 0.110 (2.8) 0.315 (8.0) 90° ± 0.2° B 0.157 (4.0) A Ø 0.165 (Ø 4.2) 2 PLACES 0.787 (20.0) CALIBRATION NOTCH 1.142 (29.0) ± 0.010 TERMINAL THICKNESS 0.040 (1.0) ALL VALUES Rated Power in % DERATING TOLERANCES ON DECIMALS XXX ± 0.005 120 100 80 60 RESISTANCE VALUE (μ) A DIMENSION (inches) B DIMENSION (inches) ELEMENT MATERIAL 100 0.040 0.080 Mn-Cu 250 0.059 0.276 Mn-Cu 300 0.051 0.276 Mn-Cu 430 0.038 0.315 Mn-Cu 500 0.033 0.315 Mn-Cu 40 20 0 - 65 - 50 - 25 0 25 50 75 70 100 125 150 175 Ambient Temperature in °C PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal shock -55 °C to +150 °C, 1000 cycles, 15 min at each extreme ± 0.5 % R Short time overload 5 x rated power for 5 s ± 0.5 % R Low temperature operation -65 °C for 45 min ± 0.5 % R High temperature exposure 1000 h at +170 °C ± 1.0 % R Bias humidity +85 °C, 85 % RH, 10 % bias, 1000 h ± 0.5 % R Mechanical shock 100 g’s for 6 ms, 5 pulses ± 0.5 % R Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h ± 0.5 % R Load life 1000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF” ± 1.0 % R Moisture resistance MIL-STD-202, method 106, 0 % power, 7b not required ± 0.5 % R Revision: 24-Mar-16 Document Number: 30160 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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