Features
■ TO-220 housing
■ Low inductance
■ Resistor electrically isolated from the
backplate
■ High power rating
■ RoHS compliant*
Applications
■ Power supplies
■ Motor drives
■ Test and measurement
■ Rectifi ers
Electrical & Thermal Characteristics
PWR220T-20 Series Power Resistor
*RoHS COMPLIANT
*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.
Customers should verify actual device performance in their specifi c applications.
General Information
Bourns® PWR220T-20 Series is a TO-220 DPAK style power resistor. Manufactured using thick fi lm on alumina ceramic technology, it
is used in current measurement, snubber, bleeder and discharge circuits.
Parameter Value(s)
Resistance (See Popular Resistance Values table) 0.02 Ω to 130 KΩ
Power Rating @ 25 ˚C Case Temperature 20 W
Tolerance ±1 %**, ±5 %
TCR
0.02 Ω<R<130.0 KΩ±100 PPM/˚C
Thermal Resistance - Rthj 6.5 ˚C/W
Inductance 0.1 µH maximum
Operating Voltage √P*R with a maximum of 250 V
Dielectric Strength 2 KV AC
Insulation Resistance 10 GΩ
Operating Temperature -55 ˚C to 155 ˚C
Material Characteristics
Resistor ...................................Thick fi lm
Substrate ..................... Alumina (AL203)
Housing ........................................Epoxy
Pins....................Tinned Copper (Sn/Cu)
Flammability ........ Conforms to UL-94V0
Reliability Characteristics
Parameter Specifi cation
Short Term Overload (2x Pr for R < 2 Ω,
1.6 x Pr for R ≥ 2 Ω, V < 1.5 x Operating Voltage) ΔR ±0.25 %
Load Life (1000 hours at rated power) ΔR ±1.0 %
Thermal Shock (-55 ˚C to 155 ˚C, 5 cycles) ΔR ±0.5 %
Resistance to Soldering Heat (10 seconds at
270 ˚C) ΔR ±0.5 %
Vibration (20 G 10-2000 Hz .06 ” D.A.) ΔR ±0.25 %
Terminal Strength (MIL-STD-202, Method 211
Test A1) ΔR ±0.2 %
Shock (Saw Tooth: 100 g/6 ms) ΔR ±0.5 %
Humidity (Steady State) 1000 hrs. 85 °C/85 % RH ΔR ±0.5 %
High Temperature Exposure
(100 hrs - 40 % Pr @ +125 °C) ΔR ±0.5 %
Packaging
............................................ 50 pcs./tube
220 20
3302 1%
923
COSTA RICA
** Available for most values. Check Popular Resistance Values table.
Popular Resistance Values
Code Resistance
Value Code Resistance
Value
R020 0.02 Ω*** 1000 100 Ω
R025 0.025 Ω*** 1200 120 Ω
R030 0.03 Ω*** 1500 150 Ω
R033 0.033 Ω*** 2000 200 Ω
R040 0.04 Ω*** 2500 250 Ω
R050 0.05 Ω*** 3000 300 Ω
R075 0.075 Ω*** 3300 330 Ω
R100 0.1 Ω 4000 400 Ω
R150 0.15 Ω 4700 470 Ω
R200 0.2 Ω 5000 500 Ω
R250 0.25 Ω 5600 560 Ω
R300 0.3 Ω 7500 750 Ω
R330 0.33 Ω 1001 1.0 KΩ
R400 0.4 Ω 1501 1.5 KΩ
R500 0.5 Ω 2001 2.0 KΩ
R750 0.75 Ω 2501 2.5 KΩ
1R00 1 Ω 3001 3.0 KΩ
1R50 1.5 Ω 3301 3.3 KΩ
2R00 2 Ω 4001 4.0 KΩ
2R50 2.5 Ω 5001 5.0 KΩ
3R00 3 Ω 7501 7.5 KΩ
3R30 3.3 Ω 1002 10 KΩ
4R00 4 Ω 1502 15 KΩ
5R00 5 Ω 2002 20 KΩ
7R50 7.5 Ω 2502 25 KΩ
8R00 8 Ω 3002 30 KΩ
10R0 10 Ω 3302 33 KΩ
12R0 12 Ω 4002 40 KΩ
15R0 15 Ω 4702 47 KΩ
20R0 20 Ω 5002 50 KΩ
25R0 25 Ω 5602 56 KΩ
27R0 27 Ω 6802 68 KΩ
30R0 30 Ω 7502 75 KΩ
33R0 33 Ω 8202 82 KΩ
40R0 40 Ω 1003 100 KΩ
47R0 47 Ω 1153 115 KΩ
50R0 50 Ω 1203 120 KΩ
56R0 56 Ω 1253 125 KΩ
75R0 75 Ω 1303 130 KΩ
*** 5 % Tolerance
Typical Part Marking
220 20
R500 1%
902
COSTA RICA
MANUFACTURER'S
TRADEMARK
MODEL
NUMBER
RESISTANCE
CODE TOLERANCE
DATE CODE
COUNTRY
OF ORIGIN
2.25
(.089)
1.23
(.049)
4.0
(.158)
14.6
(.575
28.3
(1.12)
REF.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
PWR220T-20 Series Power Resistor
REV. 11/11
PWR 220 T - 20 - 10R0 F
Model
PWR = Power Resistor
Package
220 = TO-220 Style
Pin Style
T = Through-hole
Power
20 = 20 W
Resistance Value
<100 ohms ... “R” represents decimal point
(examples: 7R50 = 7.5 Ω; R500 = 0.5 Ω)
≥100 ohms .... First three digits are signifi cant, fourth digit represents
number of zeros to follow
(examples: 2000 = 200 ohms; 3002 = 30K ohms)
Absolute Tolerance
J = 5 %
F = 1 %
How to Order
Pulse Power Rating
Energy in Joules
Overload Duration in Seconds
10
100
1
0.1
0.01
10-7 10 -6 10-5 10-4 10-3 10-2 10 -1
The energy absorbed by the resistor expressed in Joules can be
calculated by multiplying the peak power of the pulse in watts
times the length of the pulse in seconds.
The energy should not exceed the limits shown in the graph.
The overload voltage should not exceed 1.5 times the maximum
operating voltage.
Product Dimensions
10.1
(.398)
3.6
(.142) DIA.
2.5
(.098)
6.0
(.236)
8.63
(.340)
13.72
(.540)
0.72
(.029)
5.08
(.200)
Power Ratio (%)
Temperature of Backplate (°C)
100
80
120
60
40
20
0
-20
25 35 755545 95 105
65 85 115 125 135 145 155
Derating Curve
DIMENSIONS: MM
(INCHES)
