Wirewound Resistors

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Bourns offers a broad range of wirewound resistors with axial leaded through hole and surface mounted packages. These resistors are made by wrapped a high-performance resistive alloy wire around a low thermal resistance ceramic core. Wirewound resistors have superior pulse capability and available in non-inductive styles as well.

W, WS and FW series axial leaded through hole wirewound resistors are coated by UL 94V-0 compliant material.

FW series axial fusible resistor is UL1412 recognized and offers an integrated solution as it provides both inrush current protection and fusible overcurrent protection.

PWR series resistors covered by epoxy molded encapsulation which provides environmental protection for the resistive wire. And due to their wraparound terminations, they are suitable for surface mounting technology.   


Terminal Style Axial leaded, through hole Wraparound SMD
Sizes 9.5 x 4 to 52.5 x 8.5 (mm) 2010 to 5322 (inches)
Rated Power at 70®C 1 to 7 W 0.5 to 3 W
Resistance Range 0.01 ohms to 15 kiloohms 0.01 ohms to 15 kiloohms
Resistance Tolerance ±5 % 0.5 %, ±1 %, ±5 %
Temperature Coefficient ±200, ±300 ppm/°C ±20 to ±150 ppm/°C
Operating Temperature Range –55 to +155/200 °C –55 to +155/275 °C

Available features

  • High power rating
  • Superior pulse capability
  • Non-inductive version
  • UL1412 recognized fusible
  • Customized parts (surge capability, lead form)
  • Coating material meets UL 94V-0 requirements
  • RoHS compliant*
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.


  • Telecommunication Base stations
  • Audio equipment
  • Medical equipment
  • Industrial equipment
  • Smart meters
  • Renewable energy
  • Industrial
  • Power supplies/chargers
  • Lighting
  • Instruments/gauges
  • White goods
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