WK73 - Wide Terminal Resistor

KOA Speer
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The WK73 wide terminal flat chip resistor provides high reliability and performance. This new flat chip resistor features higher power ratings as a result of its enhanced heat dissipation, as demonstrated by the WK73S3A type (1225 size) with a 1.5W rating vs. KOA Speer’s RK73B3A type (2512 size) with a 1W rating. The WK73 offers current sensing for power supply circuits.  Its wide terminal construction gives the WK73 resistor superior thermal shock characteristics and high solder joint reliability. The resistance range of the WK73 is 10mΩ ~ 1MΩ and the T.C.R. is ±100, ±200, ±300, & ±800ppm/°C. The available tolerances are ±1% & ±5% with a high power rating of 0.75W, 1.0W & 1.5W @ 70°C. This wide terminal flat chip resistor sizes include 0612, 1020, 1218 & 1225 and is RoHS Compliant.



  • High reliability and performance with T.C.R. ±100 x 10-6/K, resistance tolerance ±1%, ±5%
  • Available in 0.75 - 1.5W power rating
  • Products meet EU RoHS requirements, with exemption per Annex 1, exemption 5 of EU directive 2005/95/EC


  • Automotive electronics
  • ECU’s
  • Power supplies