High Power Resistors

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Bourns offers a broad range of PWR-series high power thick film resistors with standard packages, surface mounted TO-163 and TO-263 (DPAK and D2PAK) and radial leaded through hole TO-220 and TO-247. These compact packages which are used as standard by semiconductor manufacturers offers space savings to designers and various additional standardized off-the-shelf accessories are available on the market such as thermal and mounting devices.


Packages DPAK, D2PAK, TO-220
Rated Power
(at 25 °C case temperature, mounted on heat sink)
20 to 50 W1
Resistance Range 0.02 ohms to 1 megohm
Resistance Tolerance 1 %, ±5 %
Temperature Coefficient ±100, ±200, ±600 ppm/°C
Operating Temperature Range –55 to +155/175 °C
(1) Power rating of 2 to 3.5 W at free air (without heat sink)

Available features

  • High power rating
  • Low inductance
  • Resistor electrically isolated from the backplate
  • Suitable for most types of soldering processes
  • RoHS compliant*
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.


  • Power supplies
  • Motor drives
  • Test and measurement
  • Rectifiers
  • Capacitor discharging
  • Snubber circuits
  • Current limiting
  • Heater
Series PWR221T-50
Data Sheet PWR221T-50
Photo PWR221T-50_part
Tolerances 1 %, 5 %
Temperature Coefficient ±100/±300/±600 ppm
Power per Resistor 50 W
Package TO-220
Profile/Package Style 10.41 x 16.26 x 3.18 mm
Physical Configuration Radial Through-Hole
Material Thick Film
Resistance Range (Ohms) 0.02 to 130K
Related Documents PWR221T-50
Design Files Downloads
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