Features Applications
n TO-220 housing n Power supplies
n Low inductance n Motor drives
n Ceramic backplane n Test and measurement
n High power rating n Rectifiers
n AEC-Q200 compliant
n 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 Popular Resistance Values
Resistance Resistance
Parameter Value(s)
Code Code
Value Value
Resistance (See Popular Resistance Values table) 0.02 to 130 K
R020 0.02 *** 1000 100
Power Rating @ 25 C Case Temperature 30 W**
R025 0.025 *** 1200 120
Tolerance 1 %***, 5 %
R030 0.03 *** 1500 150
TCR
R033 0.033 *** 2000 200
0.100 <R<130.0K 100 PPM/C
R040 0.04 *** 2500 250
0.050 <R<0.100 300 PPM/C
R050 0.05 *** 3000 300
0.020 <R<0.050 600 PPM/C
R075 0.075 *** 3300 330
Thermal Resistance - R 4.2 C/W
thj
R100 0.1 4000 400
Inductance 0.1 H maximum
R150 0.15 4700 470
Operating Voltage P*R with a maximum of 250 V
R200 0.2 5000 500
Dielectric Strength 2 KV AC
R250 0.25 5600 560
Insulation Resistance 10 G
R300 0.3 7500 750
Operating Temperature -55 C to +150 C
R330 0.33 1001 1.0 K
** Power rating of 2.25 W when mounted free to air (no heat sink).
R400 0.4 1501 1.5 K
*** Available for most values. Check Popular Resistance Values table.
R500 0.5 2001 2.0 K
R750 0.75 2501 2.5 K
Reliability Characteristics
1R00 1 3001 3.0 K
1R50 1.5 3301 3.3 K
Parameter Specification
2R00 2 4001 4.0 K
Short Term Overload (2x Pr for R < 2 ,
2R50 2.5 5001 5.0 K
R 0.25 %
1.6 x Pr for R 2 , V < 1.5 x Operating Voltage)
3R00 3 7501 7.5 K
Load Life (2000 hours at rated power) R 1.0 %
3R30 3.3 1002 10 K
Thermal Shock (-55 C to 155 C, 5 cycles) R 0.5 %
4R00 4 1502 15 K
Resistance to Soldering Heat (10 seconds at
5R00 5 2002 20 K
R 0.5 %
270 C)
7R50 7.5 2502 25 K
Vibration (20 G 10-2000 Hz .06 D.A.) R 0.25 %
8R00 8 3002 30 K
Terminal Strength (MIL-STD-202, Method 211
10R0 10 3302 33 K
R 0.2 %
Test A1)
12R0 12 4002 40 K
Shock (Saw Tooth: 100 g/6 ms) R 0.5 %
15R0 15 4702 47 K
Humidity (Steady State) 1000 hrs. 85 C/85 % RH R 0.5 %
20R0 20 5002 50 K
High Temperature Exposure
25R0 25 5602 56 K
R 0.5 %
(100 hrs - 40 % Pr @ +125 C)
27R0 27 6802 68 K
30R0 30 7502 75 K
Typical Part Marking 33R0 33 8202 82 K
Material Characteristics
40R0 40 1003 100 K
Resistor ...................................Thick film
47R0 47 1153 115 K
Substrate ..................... Alumina (AL203)
50R0 50 1203 120 K
MODEL
Housing ........................................Epoxy
NUMBER 56R0 56 1253 125 K
221 30
RESISTANCE Pins....................Tinned Copper (Sn/Cu)
75R0 75 1303 130 K
CODE R500 1% TOLERANCE
Flammability ........ Conforms to UL-94V0
YYWW DATE CODE
MANUFACTURER'S *** 5 % Tolerance
Moisture Sensitivity Level .....................1
COSTA RICA
COUNTRY
TRADEMARK
ESD Classification (HBM) ...................3B
OF ORIGIN
*RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Packaging
Specifications are subject to change without notice.
Users should verify actual device performance in their
............................................ 50 pcs./tube
specific applications.
The products described herein and this document are
subject to specific legal disclaimers as set forth on the
last page of this document, www.bourns.com/and at
WARNING Cancer and Reproductive Harm www.P65Warnings.ca.gov - docs/legal/disclaimer.pdf.
221 30
25R0 1%
1622
COSTA RICA
*RoHS and
AEC-Q200 COMPLIANT
*RoHS and
AEC-Q200 COMPLIANT
PWR221T-30 Series Power Resistor
Product Dimensions
8.38 0.25
10.41 0.25
3.18 0.25
3.18 0.1
(.330 .010)
(.410 .010)
(.125 .010)
(.125 .004) 1.38 0.25
CERAMIC
C
DIA. (.054 .010)
L
2.92 0.25
(.115 .010)
CERAMIC
LC
3.18 0.25
(.125 .010)
16.26 0.25
(.640 .010)
9.14 0.25
(.360 .010)
15.62 0.25
CERAMIC
(.615 .010)
REFERENCE
BOARD
SURFACE
1.02 0.25
2.54 0.25 (.040 .010)
12.7 1.27
(.100 .010) CERAMIC
(.500 .050)
MM
DIMENSIONS:
(INCHES)
0.72 0.12
5.08 0.25
(.029 .005) 0.38
1.03 0.25
(.200 .010)
TOLERANCE: UNLESS OTHERWISE NOTED
(.041 .010) (0.015)
Pulse Power Rating How to Order
PWR 221 T - 30 - 10R0 F
100
Model
PWR = Power
Resistor
Package
10
221 = TO-220 Style
Pin Style
T = Through-hole
Power
1
30 = 30 W
Resistance Value
<100 ohms ... R represents decimal
point (examples: 7R50 =
0.1 7.5 ; R500 = 0.5 )
100 ohms .... First three digits are
significant, fourth digit
represents number of
zeros to follow (exam-
0.01
ples: 2000 = 200 ohms;
-6 -5 -4 -3 -2
10 10 10 10 10 3002 = 30K ohms)
Absolute Tolerance
Overload Duration in Seconds
J = 5 %
F = 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.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page www.bourns.com/docs/legal/disclaimer.pdfof this document, and at .
Energy in Joules