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 V/C) AEC-Q200 qualified Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE VALUE RESISTANCE VALUES WEIGHT GLOBAL TOLERANCE (1) SIZE P RANGE CURRENTLY AVAILABLE (typical) 70 C MODEL % W g/1000 pieces WSMS2908 2908 3.0 5.0 50 to 1000 100, 250, 300, 430, 500 2100 Note (1) Other values may be available, contact factory TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS 1100 for 100 , 300 for 250 , Temperature coefficient ppm/C 225 for 300 , 175 for 430 and 500 Operating temperature range C -65 to +170 1/2 Maximum current rating A (P/R) GLOBAL PART NUMBER INFORMATION GLOBAL PART NUMBERING: WSMS2908L1000JE (WSMS2908, 0.0001 , 5 %, tape / reel) 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 J = 5.0 % K = bulk pack (dash number) L1000 = 0.00010 E = tape and reel (up to 2 digits) L2500 = 0.00025 from 1 to 99 as L3000 = 0.00030 applicable L4300 = 0.00043 L5000 = 0.00050 Revision: 11-Aug-17 Document Number: 30160 1 For technical questions, contact: ww2cresistors vishay.com 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 91000WSMS2908 www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) 0.453 (11.5) 0.157 (4.0) 0.142 (3.6) 0.059 (1.5) 0.118 (3.0) 0.110 (2.8) 90 2.0 0.315 (8.0) B 0.157 (4.0) A 0.165 ( 4.2) 2 PLACES 0.787 (20.0) CALIBRATION NOTCH 1.142 (29.0) 0.010 TERMINAL THICKNESS 0.040 (1.0) ALL VALUES DERATING TOLERANCES ON DECIMALS 120 .XXX 0.005 .x 0.1 100 UNLESS OTHERWISE LISTED 80 RESISTANCE A B ELEMENT 60 VALUE DIMENSION DIMENSION MATERIAL () (inches) (inches) 40 100 0.040 0.080 Mn-Cu 20 250 0.059 0.276 Mn-Cu 300 0.051 0.276 Mn-Cu 0 - 65- 50 - 25 0 25 50 75 100 125 150 175 430 0.038 0.315 Mn-Cu Ambient Temperature in C 70 500 0.033 0.315 Mn-Cu 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 5x rated power for 5 s 0.5 % R Low temperature storage -65 C for 24 h 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 gs 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: 11-Aug-17 Document Number: 30160 2 For technical questions, contact: ww2cresistors vishay.com 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 Rated Power in %