Pulse Power Resistors

Present-day electronic devices are often faced with short-term increases in voltage or current such as inrush current during electronics turn-on, transient load when transformers or motors are energized, capacitor charging or discharging, electrostatic discharge sparks, lightning strikes or overcurrent caused by malfunction of the circuit or mixed up lines.

Bourns provides a wide selection of resistors able to withstand such short duration impulse events, up to rated limits.

The maximum pulse capability of the resistors is specified in each product data sheet.

The pulse power and pulse energy graph below shows the maximal power or energy to be applied to the resistor over a given time period.


Example of CMP Series Thick Film Chip Resistor Peak Pulse vs. Duration 

The following surge performance curve shows the maximal peak voltage for a 1.2 / 50 µs pulse according to the IEC 61000-4-5 standard.

Example of WS Series Wirewound Resistor Peak Voltage vs. Resistance

1.2 / 50 µs Surge Defined by IEC 61000-4-5

Available features

  • Thick film chip resistors
  • Wirewound SMT resistors
  • Wirewound axial resistors
  • Sulfur-resistant designs available
  • AEC-Q200 compliancy available
  • Tested according to IEC 61000-4-5
  • RoHS compliant*
  • Suitable for most types of soldering processes
  • Standard packaging in tape and reel, and ammo pack

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.




  • Consumer
  • Industrial
  • Telecom
  • Smart meters
  • Power supplies
  • Inverters
  • Inrush current limiting
  • Capacitor charge/discharge
  • Bleeder circuits


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