Features
■ TO220 or TO221 housing
■ Low inductance
■ SMD and through hole versions
■ High power rating
PWR220/PWR221 F Series Power Resistors
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specifi c applications.
General Information
The Bourns® PWR220 F Series is a TO220 style Power Resistor; PWR221 F is a
TO221 style Power Resistor. Manufactured using thick fi lm on Alumina ceramic
technology, it is used in applications such as power supplies, motor drives and mea-
surements.
Material Specifi cations
Resistor ...................................Thick fi lm
Substrate ..................... Alumina (AL203)
Housing ................................Epoxy/PPS
Lead Frame .......Tinned Copper (Sn/Cu)
Maximum Torque ........................ 1.0 Nm
Packaging
Tubes .............................. 50 pcs./tube
Tape & Reel** ................. 500 pcs./reel
**Tape & Reel is only available for
Versions A and D.
Electrical & Thermal Characteristics
Parameter Symbol Min. Nom. Max. Unit
Resistance
(Version A)
(Version C & D)
R
R
0.02
0.02
100K
15K
Ω
Ω
Power Rating @ 70 °C in Free Air
Power Rating with External Heat Sink
(Version A)
(Version C & D)
1.50
30
50
W
W
W
Tolerance
0.02 Ω < R < 1.0 Ω
1.0 Ω < R < 100K Ω
2.0
1.0
5.0
5.0
%
%
TCR
0.1 Ω < R < 100.0K Ω
0.05 Ω < R < 0.099 Ω
0.02 Ω < R < 0.049 Ω
±100
±300
±600
PPM/°C
PPM/°C
PPM/°C
Thermal Resistance – Rthj
(Version A)
(Version C & D)
3.5
2.1
°C/W
°C/W
Stability 0.5 %
Dielectric Withstanding Voltage 2 kV DC
Operating Temperature TJ-40 +155 °C
*RoHS COMPLIANT
This series is unavailable and not
recommended for new designs.