SM www.vishay.com Vishay Huntington Wirewound Resistors, Precision Power, Surface Mount FEATURES • All welded construction • Molded encapsulation • Wraparound terminations • Excellent stability at different environmental conditions • High power ratings (up to 4 W) • Available in non-inductive styles (“NI” SPECIAL) with Ayrton-Perry winding (Resistance max. value is one half standard value) • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 STANDARD ELECTRICAL SPECIFICATIONS HISTORICAL MODEL POWER RATING P70 °C W RESISTANCE RANGE SM-1 SM1 0.5 0.1 to 400 0.1, 0.25, 0.5, 1, 5 SM-2 SM2 1 0.1 to 3K 0.1, 0.25, 0.5, 1, 5 SM-3 SM3 3 0.1 to 25K 0.1, 0.25, 0.5, 1, 5 SM-4 SM4 2 0.1 to15K 0.1, 0.25, 0.5, 1, 5 SM-5 SM5 4 0.1 to 50K 0.1, 0.25, 0.5, 1, 5 GLOBAL MODEL TOLERANCE ±% TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient UNIT SM RESISTOR CHARACTERISTICS ppm/°C ± 20 > 10 , ± 50 1 to 10 , contact factory for 0.99 and below Dielectric Withstanding Voltage VAC 1000 Operating Temperature Range °C - 55 to + 275 Maximum Working Voltage V (P x R)1/2 GLOBAL PART NUMBER INFORMATION Global Part Numbering example: SM-2R4000FE6 (visit www.vishay.net SAP parts manual for all options) S M - 2 R 4 0 0 0 F E 6 GLOBAL MODEL (4 digits) VALUE (5 digits) TOLERANCE (1 digit) PACKAGING CODE (2 digits) SPECIAL (up to 3 digits) SM-1 SM-2 SM-3 SM-4 SM-5 R = Decimal K = Thousand 1R500 = 1.5 4K000 = 4 k B = ± 0.1 % C= ± 0.25 % D = ± 0.5 % F=±1% J = ± 5% E6 = Lead (Pb)-free, tape and reel pack (Dash Number) From 1 to 999 as applicable NI = Non-inductive Historical Part Number example: SM2-0.4-1% SM2 0.4 1% HISTORICAL MODEL RESISTANCE VALUE TOLERANCE Revision: 22-Aug-12 Document Number: 31812 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 SM www.vishay.com Vishay Huntington DIMENSIONS in inches [millimeters] T L c + H W b a W1 GLOBAL MODEL DIMENSIONS in inches [millimeters] SOLDER PAD DIMENSIONS L ± 0.015 [0.381] W ± 0.015 [0.381] H ± 0.015 [0.381] W1 ± 0.015 [0.381] T ± 0.015 [0.381] a ± 0.015 [0.381] b ± 0.015 [0.381] c ± 0.015 [0.381] 0.190 [4.83] 0.130 [3.30] 0.110 [2.79] 0.060 [1.52] 0.040 [1.02] 0.062 [1.57] 0.100 [2.54] 0.250 [6.35] SM-2 0.260 [6.60] 0.155 [3.94] 0.125 [3.18] 0.070 [1.78] 0.070 [1.78] 0.096 [2.44] 0.112 [2.84] 0.337 [8.56] SM-3 0.625 [15.88] 0.270 [6.86] 0.250 [6.35] 0.120 [3.05] 0.135 [3.43] 0.200 [5.08] 0.150 [3.81] 0.700 [17.78] SM-4 0.450 [11.43] 0.250 [6.35] 0.180 [4.57] 0.120 [3.05] 0.100 [2.54] 0.155 [3.94] 0.230 [5.84] 0.540 [13.72] SM-5 0.820 [20.83] 0.295 [7.49] 0.305 [7.75] 0.150 [3.81] 0.190 [4.83] 0.220 [5.59] 0.250 [6.35] 0.900 [22.86] DERATING MATERIAL SPECIFICATIONS Element: Copper-nickel alloy Encapsulation: Molded epoxy Core: Ceramic Terminal: Matte tin Part Marking: HEI, model, value, tolerance, date code Note • Due to resistor size limitations some resistors will have minimal information marked on parts. RATED POWER IN % SM-1 120 100 80 60 40 20 0 - 55 0 50 100 70 150 200 250 300 350 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 % + 0.05 ) R Short Time Overload 5 x rated power for 5 s ± (0.5 % + 0.05 ) R Low Temperature Storage - 55 °C for 24 h ± (0.5 % + 0.05 ) R Load Life 1000 h at rated power, + 70 °C, 1.5 h “ON”, 0.5 h “OFF” ± (1.0 % + 0.05 ) R PACKAGING MODEL REEL TAPE WIDTH SM-1 12 mm/embossed plastic SM-2 16 mm/embossed plastic SM-3 24 mm/embossed plastic SM-4 24 mm/embossed plastic SM-5 32 mm/embossed plastic Revision: 22-Aug-12 DIAMETER 178 mm/7" 330 mm/13" 178 mm/7" 330 mm/13" 178 mm/7" 330 mm/13" 178 mm/7" 330 mm/13" 178 mm/7" 330 mm/13" PIECES/REEL 650 3000 600 2000 125 500 250 1000 180 500 CODE E6 E6 E6 E6 E6 Document Number: 31812 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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