Features
■ TO220 or TO221 housing
■ Low inductance
■ SMD and through hole versions
■ High power rating
Applications
■ Power supplies
■ Motor drives
■ Test and measurement
■ Welding
PWR220/PWR221 F Series Power Resistors
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifi cations are subject to change without notice.
Customers 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 measurements.
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 & B)
(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 & B)
(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 & B)
(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
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
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 signifi cant, 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
Product Dimensions
10.16
(0.4)
T
O
220 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
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)
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)
11.16
(0.439)
18.33
(0.722)
12.10
(0.476)
3.20
(0.126)
5.08
(0.200)
1.76
(0.069)
Recommended Pad Layout
DIMENSIONS: MM
(INCHES)
Typical Part Marking
PWR220-2F
R500 1%
0512
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION
ABSOLUTE
RESISTANCE,
TOLERANCE
DATE CODE:
YYWW
REV. 09/10
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
PWR220/PWR221 F Series Power Resistors
Soldering Profi le (Surface Mount Version Only) Derating Curve
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
Temperature of Heat Sink (°C)
50 85 100 115 130 155145
120
100
80
60
40
20
0
25
Power Ratio (%)
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 DIMENSIONS: MM
(INCHES)
Devices are packed in accordance with EIA standard
RS-481-A and specifi cations shown here.
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
