Features
n TO-220 housing
n Low inductance
n Ceramic backplane
n High power rating
n AEC-Q200 qualified
n RoHS compliant*
Applications
n Power supplies
n Motor drives
n Test and measurement
n Rectifiers
Electrical & Thermal Characteristics
PWR221T-30 Series Power Resistor
*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.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
General Information
Bourns
®
PWR221T-30 Series is a TO-220 style power resistor made using thick lm on alumina ceramic technology. It is used in
current limiting, capacitor discharge or current measurement circuits in power supplies for telecom and industrial applications.
Parameter Value(s)
Resistance (See Popular Resistance Values table) 0.02 Ω to 130 KΩ
Power Rating @ 25 ˚C Case Temperature 30 W**
Tolerance ±1 %***, ±5 %
TCR
0.100 Ω<R<130.0K Ω
0.050 Ω<R<0.100 Ω
0.020 Ω<R<0.050 Ω
±100 PPM/˚C
±300 PPM/˚C
±600 PPM/˚C
Thermal Resistance - R
thj
4.2 ˚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 +150 ˚C
Material Characteristics
Resistor ...................................Thick lm
Substrate ..................... Alumina (AL203)
Housing ........................................Epoxy
Pins....................Tinned Copper (Sn/Cu)
Flammability ........ Conforms to UL-94V0
Reliability Characteristics
Parameter Specication
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 (2000 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
** Power rating of 2.25 W when mounted free to air (no heat sink).
*** Available for most values. Check Popular Resistance Values table.
Typical Part Marking
221 30
R500 1%
YYWW
COSTA RICA
MANUFACTURER'S
TRADEMARK
MODEL
NUMBER
RESISTANCE
CODE
TOLERANCE
DATE CODE
COUNTRY
OF ORIGIN
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
*RoHS COMPLIANT
& AEC-Q200 QUALIFIED
*RoHS COMPLIANT
AEC APPROVED (Select Models)
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
221 30
25R0 1%
1622
COSTA RICA
