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SM163
SM/ SMX Series — Surface Mount - Wirewound/ Film Features SM - Wirewound Element SMX - Metal Oxide Element • High temperature molded encapsulation • SMX: economical SMT 2 and 3watt • Flex termination for absorbing thermal expansion • SMX extends value range up to 470K • All welded construction • Both are RoHS compliant/ lead-free • Available in non-inductive styles Electrical Specifications Ohmic Range and Tolerance Power Rating (Watts) @ 70°C Maximum Working Voltage Resistance Temperature Coefficient 0.1% & 0.5% 1% 5% SM 1 1W 25 ±100 ppm/°C ± 20 ppm/°C 0.01Ω – 10Ω* 10Ω – 1K 0.01Ω – 10Ω* 10Ω – 1K 0.01Ω – 10Ω* 10Ω – 1K SM 2 2W 50 ±100 ppm/°C ± 20 ppm/°C 0.01Ω – 10Ω* 10Ω – 2K 0.01Ω – 10Ω* 10Ω – 2K 0.01Ω – 10Ω* 10Ω – 2K SMX 2 2W 350 ±200 ppm/°C – 2.0K – 100K 2.0K – 470K SM 2A 2W 60 ±100 ppm/°C 0.005Ω – 0.976Ω* 0.005Ω – 0.976Ω* 0.005Ω – 0.976Ω* SM 3 3W 100 ±100 ppm/°C ± 20 ppm/°C 0.01Ω – 10Ω* 10Ω – 3.01K 0.01Ω – 10Ω* 10Ω – 3.01K 0.01Ω – 10Ω* 10Ω – 3.01K SMX 3 3W 500 ±200 ppm/°C – 3.01K – 118K 3.01K – 470K Type * Zero ohm available on all sizes . Mechanical Specifications Type Tolerance SM 1 SM/ SMX 2 SM 2A SM/ SMX 3 A Body Length B Total Length C Body Height D Body Width ±0.015 ±0.4 0.260 6.6 0.410 10.4 0.475 12.1 0.629 16.0 ±0.032 ±0.81 0.280 7.1 0.435 11.1 0.500 12.7 0.708 18.0 ±0.015 ±0.4 0.140 3.6 0.180 4.6 0.140 3.6 0.256 6.5 E F Termination Width Termination Length Units ±0.015 ±0.4 0.150 3.8 0.240 6.1 0.305 7.8 0.276 7.0 ±0.015 ±0.4 0.090 2.3 0.100 2.5 0.110 2.8 0.110 2.8 ±0.015 ±0.4 0.100 2.5 0.115 2.9 0.115 2.9 0.115 2.9 inches mm inches mm inches mm inches mm How to Order SM 2 1K 1% R SEI Type Code Nominal Resistance Tolerance Packaging Type Element Code Size Tolerance Series Code Description Pkg Qty SM Wirewound 1 2815 0.1% SM 1 R 13" Reel 1,500 SMX Metal Oxide 2 4424 0.5% SM 2, SMX 2 R 13" Reel 800 2A 5031 1% SM 2A R 13" Reel 1,200 3 7128 5% SM 3, SMX 3 R 13" Reel 750 Toll Free: (888) SEI-SEIS (888) 734-7347 www.seielect.com 45 email: marketing@seielect.com
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