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Features
Applications
■ TO-220 housing
■ Power supplies
■ Low inductance
■ Motor drives
■ Ceramic backplane
■ Test and measurement
■ High power rating
■ Rectifiers
■ RoHS compliant*
PWR221T-30 Series Power Resistor
General Information
Bourns® PWR221T-30 Series is a TO-220 style power resistor made using thick film on alumina ceramic technology. It is used in
current limiting, capacitor discharge or current measurement circuits in power supplies for telecom and industrial applications.
Electrical & Thermal Characteristics
Parameter
Resistance (See Popular Resistance Values table)
Power Rating @ 25 ˚C Case Temperature
Tolerance
TCR
0.100 Ω<R<130.0 KΩ
0.050 Ω<R<0.100 Ω
0.020 Ω<R<0.050 Ω
Thermal Resistance - Rthj
Inductance
Operating Voltage
Dielectric Strength
Insulation Resistance
Operating Temperature
Popular Resistance Values
Value(s)
0.02 Ω to 130 KΩ
30 W**
±1 %***, ±5 %
±100 PPM/˚C
±300 PPM/˚C
±600 PPM/˚C
4.2 ˚C/W
0.1 µH maximum
√P*R with a maximum of 250 V
2 KV AC
10 GΩ
-55 ˚C to +150 ˚C
** Power rating of 2.25 W when mounted free to air (no heat sink).
*** Available for most values. Check Popular Resistance Values table.
Reliability Characteristics
Parameter
Short Term Overload (2x Pr for R < 2 Ω,
1.6 x Pr for R ≥ 2 Ω, V < 1.5 x Operating Voltage)
Load Life (2000 hours at rated power)
Thermal Shock (-55 ˚C to 155 ˚C, 5 cycles)
Resistance to Soldering Heat (10 seconds at
270 ˚C)
Vibration (20 G 10-2000 Hz .06 ” D.A.)
Terminal Strength (MIL-STD-202, Method 211
Test A1)
Shock (Saw Tooth: 100 g/6 ms)
Humidity (Steady State) 1000 hrs. 85 °C/85 % RH
High Temperature Exposure
(100 hrs - 40 % Pr @ +125 °C)
Material Characteristics
Resistor ...................................Thick film
Substrate ..................... Alumina (AL203)
Housing ........................................Epoxy
Pins....................Tinned Copper (Sn/Cu)
Flammability ........ Conforms to UL-94V0
Specification
ΔR
±0.25 %
ΔR
ΔR
±1.0 %
±0.5 %
ΔR ±0.5 %
ΔR ±0.25 %
ΔR ±0.2 %
ΔR ±0.5 %
ΔR ±0.5 %
ΔR ±0.5 %
Typical Part Marking
MODEL
NUMBER
RESISTANCE
CODE
MANUFACTURER'S
TRADEMARK
Packaging
221 30
R500 1%
902
COSTA RICA
TOLERANCE
DATE CODE
Code
Resistance
Value
Code
Resistance
Value
R020
R025
R030
R033
R040
R050
R075
R100
R150
R200
R250
R300
R330
R400
R500
R750
1R00
1R50
2R00
2R50
3R00
3R30
4R00
5R00
7R50
8R00
10R0
12R0
15R0
20R0
25R0
27R0
30R0
33R0
40R0
47R0
50R0
56R0
75R0
0.02 Ω***
0.025 Ω***
0.03 Ω***
0.033 Ω***
0.04 Ω***
0.05 Ω***
0.075 Ω***
0.1 Ω
0.15 Ω
0.2 Ω
0.25 Ω
0.3 Ω
0.33 Ω
0.4 Ω
0.5 Ω
0.75 Ω
1Ω
1.5 Ω
2Ω
2.5 Ω
3Ω
3.3 Ω
4Ω
5Ω
7.5 Ω
8Ω
10 Ω
12 Ω
15 Ω
20 Ω
25 Ω
27 Ω
30 Ω
33 Ω
40 Ω
47 Ω
50 Ω
56 Ω
75 Ω
1000
1200
1500
2000
2500
3000
3300
4000
4700
5000
5600
7500
1001
1501
2001
2501
3001
3301
4001
5001
7501
1002
1502
2002
2502
3002
3302
4002
4702
5002
5602
6802
7502
8202
1003
1153
1203
1253
1303
100 Ω
120 Ω
150 Ω
200 Ω
250 Ω
300 Ω
330 Ω
400 Ω
470 Ω
500 Ω
560 Ω
750 Ω
1.0 KΩ
1.5 KΩ
2.0 KΩ
2.5 KΩ
3.0 KΩ
3.3 KΩ
4.0 KΩ
5.0 KΩ
7.5 KΩ
10 KΩ
15 KΩ
20 KΩ
25 KΩ
30 KΩ
33 KΩ
40 KΩ
47 KΩ
50 KΩ
56 KΩ
68 KΩ
75 KΩ
82 KΩ
100 KΩ
115 KΩ
120 KΩ
125 KΩ
130 KΩ
*** 5 % Tolerance
COUNTRY
OF ORIGIN
............................................ 50 pcs./tube
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and
RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
PWR221T-30 Series Power Resistor
Product Dimensions
10.41 ± 0.25
(.410 ± .010)
3.18 ± 0.25
(.125 ± .010)
CL
1.38 ± 0.25
(.054 ± .010)
3.18 ± 0.1
(.125 ± .004)
DIA.
8.38 ± 0.25
(.330 ± .010)
CERAMIC
2.92 ± 0.25
(.115 ± .010)
CERAMIC
3.18 ± 0.25
(.125 ± .010)
16.26 ± 0.25
(.640 ± .010)
9.14 ± 0.25
(.360 ± .010)
CERAMIC
1.02 ± 0.25
(.040 ± .010)
CERAMIC
2.54 ± 0.25
(.100 ± .010)
12.7 ± 1.27
(.500 ± .050)
0.72 ± 0.12
(.029 ± .005)
5.08 ± 0.25
(.200 ± .010)
1.03 ± 0.25
(.041 ± .010)
Pulse Power Rating
DIMENSIONS:
MM
(INCHES)
How to Order
PWR 221 T - 30 - 10R0 F
100
Model
PWR = Power
Resistor
Package
220 = TO-220 Style
Energy in Joules
10
Pin Style
T = Through-hole
Power
30 = 30 W
1
Resistance Value
<100 ohms ... “R” represents decimal
point (examples: 7R50 =
7.5 Ω; R500 = 0.5 Ω)
≥100 ohms.... First three digits are
significant, fourth digit
represents number of
zeros to follow (examples: 2000 = 200 ohms;
3002 = 30K ohms)
0.1
0.01
10 - 6
10 - 5
10 -4
10 - 3
10 -2
Absolute Tolerance
J=5%
F=1%
Overload Duration in Seconds
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.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
PWR221T-30 Series Power Resistor
Derating Curve
120
Power Ratio (%)
100
80
60
40
20
0
25
35
45
55
65
75
85
95
105
115 125 135 145 150
Case Temperature (°C)
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
REV. 11/11
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications