PWR220/PWR221 F Series Power Resistors
Features
■TO220 or TO221 housing
■Low inductance
■SMD and through hole versions
■High power rating
Applications
■Power supplies
■Motor drives
■Test and measurement
■Welding
General Information
The Bourns®PWR220 F Series is a TO220 style Power Resistor; PWR221 F is a TO221 style
Power Resistor. Manufactured using thick film on Alumina ceramic technology, it is used in
applications such as power supplies, motor drives and measurements.
Electrical & Thermal Characteristics
Parameter Symbol Min. Nom. Max. Unit
Resistance
(Version A & B) R 0.02 100K Ω
(Version C & D) R 0.02 15K Ω
Power Rating @ 70 °C in Free Air 1.50 W
Power Rating @ 70 °C with External Heat Sink*
(Version A & B) 30 W
(Version C & D) 50 W
Tolerance
0.02 Ω< R < 1.0 Ω2.05.0%
1.0 Ω< R < 100K Ω1.05.0%
TCR
0.1 Ω< R < 100.0K Ω±100 PPM/°C
0.05 Ω< R < 0.099 Ω±300 PPM/°C
0.02 Ω< R < 0.049 Ω±600 PPM/°C
Thermal Resistance – Rthj
(Version A & B) 3.5 °C/W
(Version C & D) 2.1 °C/W
Stability 0.5 %
Dielectric Withstanding Voltage 2 kV DC
Operating Temperature TJ-40 +155 °C
*RoHS Directive 2002/95/EC Jan 27 2003, including Annex
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Material Specifications
Resistor ..........................................Thick film
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.
*RoHS COMPLIANT
*Thermal junction 130 °C max.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Product Dimensions
PWR220/PWR221 F Series Power Resistors
How to Order
PWR 220 - 2 F B R040 J E
Model
PWR = Power Resistor
Package
220 = TO220
221 = TO221
Number of Pins
2 = 2
Function
F = Thick Film
Version
A = TO220 Housing, Surface Mount, 30 W (w/Heat Sink)
B = TO220 Housing/TO221 Housing, Through-Hole, 30 W (w/Heat Sink)
C = TO220 Housing/TO221 Housing, Through-Hole, 50 W (w/Heat Sink)
D = TO220 Housing, Surface Mount, 50 W (w/Heat Sink)
Resistor Value for all Tolerances
<100 ohms ....“R” represents decimal point
(examples: 7R50 = 7.5 ohms; R040 = 0.040 ohms)
≥100 ohms ....First three digits are significant, fourth digit represents
number of zeros to follow
(examples: 2000 = 200 ohms; 2002 = 20K ohms)
Absolute Tolerance
J = 5 % G = 2 % F = 1 %
Packaging
E = Tape & Reel (Available only for Versions A and D)
___ = Tubes
Typical Part Marking
PWR220-2F
R500 1%
0512
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION
ABSOLUTE
RESISTANCE,
TOLERANCE
DATE CODE:
YYWW
10.16
(0.4)
TO220 Housing: 2-Pin
3.7
(0.15)
4.0
(0.16)
6.0
(0.24)
17.3
(0.68)
27.3
(1.07)
14.4
(0.57)
16.4
(0.65)
1.3
(0.05)
1.2
(0.05)
1.85
(0.07)
0.4
(0.015)
0.76
(0.03)
5.08
(0.2)
MEASURING
POINT
TO220 Casing: 2-Pin (Surface Mount)
10.16
(0.4)
14.6
(0.57)
15.0
(0.59)
17.33
(0.68)
12.7
(0.50)
0.76
(0.03)
1.4
(0.06)
4.0
(0.16)
1.2
(0.05)
TO221 Casing: 2-Pin
10.16
(0.4)
3.2
(0.13)
3.7
(0.15)
4.0
(0.16)
18.3
(0.72)
28.3
(1.11)
14.4
(0.57)
16.4
(0.65)
1.3
(0.05)
1.2
(0.05)
1.85
(0.07)
0.4
(0.015)
0.76
(0.03)
MEASURING
POINT 5.08
(0.2)
Recommended Pad Layout
11.16
(0.439)
18.33
(0.722)
12.10
(0.476)
3.20
(0.126)
5.08
(0.200)
1.76
(0.069)
PWR220/PWR221 F Series Power Resistors
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
REV. 06/08
Devices are packed in accordance with EIA standard
RS-481-A and specifications shown here.
MM
(INCHES)
DIMENSIONS:
Item Symbol Dimensions
Carrier Width A 10.4
(0.409)
Carrier Length B 18.4
(0.724)
Carrier Depth C 4.4
(0.173)
Reel Outside Diameter D 330
(12.992)
Punch Hole Pitch P 16.00
(0.630)
Tape Width W 32
(1.260)
Quantity per Reel — 500
Packaging Dimensions
.......
.......
....... ..............
....... ..............
P A
120
D
C
Index Hole
W
B
10 pitches (min.)
Direction of Feed
10 pitches (min.)
End
Trailer Device Leader
Start
Soldering Profile (Surface Mount Version Only)
50
100
150
200
250
Temperature (°C)
90 ± 30 seconds
Pre-heating Zone
150 °C
230 °C or higher
Peak 260 +5/-0 °C
180 °C
30 ± 10 seconds
Heating Time
Soldering Zone
Derating Curve
Temperature of Heat Sink (°C)
50 85 100 115 130 155145
120
100
80
60
40
20
0
25
Power Ratio (%)
