IRC Advanced Film Division
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com TO220 Series Issue January 2006
0.01Ω 5%
0541
TO-220
Power Resistor
• TO-220 housing
• Low inductance (<50nH)
• Available in 20W or 30W
• Resistance from 0.01 to 51KΩ
• High stability film resistance elements
Electrical Data
IRC’s TO-220 power film resistors satisfy demanding applications for accurate and stable power resistors
housed in the convenient TO-220 case. The resistance element is isolated from the mounting tab by an
alumina ceramic layer, providing very low thermal resistance and ensuring high insulation resistance between
terminals and tab. The non-inductive design makes these products especially useful in high frequency and
high speed pulse applications.
Type
Power Rating 4, 5
Thermal
Resistance
Resistance Range3
Tolerances Temperature Coefficient
Heat-
sink1Free Air2Min Max
TO222-30
30W 1W 2.3°C/W
0.1Ω220Ω±1% ±100ppm/°C
0.01Ω220Ω ±5% ±250ppm/°C
30W 1W 2.3°C/W 220Ω51KΩ±1%, ±5% ±100ppm/°C
TO220-20
20W 1W 3.3°C/W
0.1Ω220Ω±1% ±100ppm/°C
0.01Ω220Ω ±5% ±250ppm/°C
20W 1W 3.3°C/W 220Ω51KΩ±1%, ±5% ±100ppm/°C
1Power rating based on 25°C flange temperature. 2Power rating based on 25°C ambient temperature. 3Consult factory for higher or lower values. 4Max current 25 amps
5Max voltage 500V or P x R
√
T0220 Series
TO220 Series Issue January 2006
IRC Advanced Film Division
• Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
IRC Advanced Film Division
TO-220
Power Resistor
Physical Data
b1
e
b
L
R
P
E
H
Q
A
F
C
L
Note: Dimension C apply for tin plate finish.
∅
α
(5x)
D
J
C
POS
Inches Millimeters
Min Max Min Max
A0.160 0.190 4.06 4.83
b0.025 0.040 0.63 1.02
c0.015 0.022 0.38 0.56
D0.560 0.590 14.22 14.99
E0.385 0.415 9.78 10.54
e0.190 0.210 4.83 5.33
F0.045 0.055 1.14 1.40
H0.234 0.258 5.94 6.55
J0.090 0.115 2.28 2.92
∅P0.146 0.156 3.71 3.96
Q0.103 0.113 2.62 2.87
L0.540 0.560 13.72 14.22
Lead material Tinned copper α3° 7° 3° 7°
Substrate material 96% alumina ceramic b1 0.045 0.060 1.14 1.52
Resistor construction Proprietary film conductors and
proprietary alloy resistors R0.243 REF 6.17 REF
TO220 Series Issue January 2006
IRC Advanced Film Division
• Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
IRC Advanced Film Division
TO-220
Power Resistor
TEST MAX ∆R
Thermal Shock
Mil-Std-202
Method 107
Cond. F
±0.30% +0.5mΩ
Thermal Strength
Mil-Std-202
Method 211
Cond. A (5165)
±0.20%
+0.5mΩ
Short-Time Overload
5 sec 2xRated Power ±0.30% +0.5mΩ
Moisture Resistance
Mil-Std-202
Method 106
±1.0% +0.5mΩ
Mechanical Shock Method
Mil-Std-202
Method 213
Cond. I
±0.25% +0.5mΩ
Vibration
Mil-Std-202
Method 204
Cond. D
±0.25% +0.5mΩ
Load Life
MIL-Std-202
Method 108
1,000 Hours
±1.00%
+0.5mΩ
Resistance To Solder Heat
Mil-Std-202
Method 210F
Cond. B
±0.25% +0.5mΩ
Environmental Power Derating Curve
For additional information or to discuss your specific requirements, please contact our
Applications Team using the contact details below.
Ordering Data
Prefix TFP - TO220 - 30 - 1R50 - J - 100
Style
Power
20 = 20 Watts
30 = 30 Watts
Resistance Code
4-digit resistance code.
Ex: 10R0 = 10Ω, 1001 = 1KΩ
Absolute Tolerance Code
J = ±5%; F = ±1%
Absolute TCR
±100ppm/°C; ±250ppm/°C
25° 70° 150°
100
50
10
