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.

cmp_surge_performance

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.

ws_surge_performance

Example of WS Series Wirewound Resistor Peak Voltage vs. Resistance

surge_plot

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.

Applications

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

Documents

Specifications

Product Series

Parametric Table

RoHS Files

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Data Sheet

MDS

Specifications

Series	PWR4318
Data Sheet
Photo
Resistance Range	0.1-8K ohms
Tolerances	0.5 %,1 %, 5 %
Temperature Coefficient	±20 to ±90 ppm
Power per Resistor	2 W
Physical Configuration	Surface Mount Wirewound
MDS
Design Files	Downloads
Engineering
Buy Now	Buy

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Design Kits - Power Resistors

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Resistance (Ω)	min 0	max 20000000
Rated Power (Watts)
Tolerance (%)

Size (inch)
TCR (ppm/°C)
Resistive Material

Model/Datasheet	Photo	MSL	Soldering Profiles	Packaging Label	Terminal	CofC	3rd Party Test Reports	MDS	China RoHS

File	Type	Size	Uploaded on	Download
Protecting High Speed Communication Ports	PDF	843.57 KB	28 May, 2015	Download

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