Rev Date: 01/27/2011 2 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
TR Series
TO-220 and TO-247 Style Power Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
0.41 ± 0.01 0.41 ± 0.01 0.4 ± 0.01 0.41 ± 0.01 0.62 ± 0.01 inches
10.41 ± 0.26 10.41 ± 0.26 10.16 ± 0.25 10.41 ± 0.26 15.75 ± 0.26 mm
0.64 ± 0.01 0.64 ± 0.01 0.58 ± 0.01 0.64 ± 0.01 0.815 ± 0.01 inches
16.26 ± 0.26 16.26 ± 0.26 14.75 ± 0.25 16.26 ± 0.26 20.7 ± 0.26 mm
0.125 ± 0.01 0.125 ± 0.01 0.17 ± 0.015 0.125 ± 0.01 0.195 ± 0.01 inches
3.18 ± 0.26 3.18 ± 0.26 4.44 ± 0.38 3.18 ± 0.26 4.95 ± 0.26 mm
0.05 ± 0.005 0.05 ± 0.005 0.05 ± 0.005 0.05 ± 0.005 0.143 ± 0.007 inches
1.27 ± 0.13 1.27 ± 0.13 1.27 ± 0.13 1.27 ± 0.13 3.63 ± 0.18 mm
0.03 ± 0.004 0.03 ± 0.004 0.031 ± 0.003 0.03 ± 0.004 0.06 ± 0.004 inches
0.76 ± 0.1 0.76 ± 0.1 0.78 ± 0.08 0.76 ± 0.1 1.52 ± 0.1 mm
0.2 ± 0.01 0.2 ± 0.01 0.2 ± 0.01 0.2 ± 0.01 0.4 ± 0.01 inches
5.08 ± 0.26 5.08 ± 0.26 5.08 ± 0.26 5.08 ± 0.26 10.16 ± 0.26 mm
0.13 ± 0.03 0.13 ± 0.03 0.13 ± 0.03 0.13 ± 0.03 0.11 ± 0.03 inches
3.3 ± 0.76 3.3 ± 0.76 3.3 ± 0.76 3.3 ± 0.76 2.79 ± 0.76 mm
0.5 ± 0.05 0.5 ± 0.05 0.539 ± 0.04 0.5 ± 0.05 0.57 ± 0.05 inches
12.7 ± 1.27 12.7 ± 1.27 13.7 ± 1 12.7 ± 1.27 14.48 ± 1.27 mm
0.019 ± 0.004 0.019 ± 0.004 0.024 ± 0.003 0.019 ± 0.004 0.032 ± 0.01 inches
0.5 ± 0.1 0.5 ± 0.1 0.62 ± 0.08 0.5 ± 0.1 0.81 ± 0.26 mm
0.07 ± 0.01 0.07 ± 0.01 0.09 ± 0.01 0.07 ± 0.01 0.095 ± 0.01 inches
1.78 ± 0.26 1.78 ± 0.26 2.28 ± 0.25 1.78 ± 0.26 2.41 ± 0.26 mm
0.125 ± 0.004 0.144 ± 0.004 0.143 ± 0.004 inches
3.18 ± 0.1 3.65 ± 0.1 3.63 ± 0.18 mm
0.125 ± 0.01 0.116 ± 0.004 0.21 ± 0.01 inches
3.18 ± 0.26 2.95 ± 0.1 5.33 ± 0.26 mm
0.051 ± 0.004 inches
1.3 ± 0.1 mm
0.24 ± 0.004 inches
6.1 ± 0.1 mm
Units
A
P
TR20 TR30 TR35 TR50 TR100
B
C
D
Type /
Code
E
F
-
G
H
J
K
M
N
O
-
-
--
-
-
-
-
-
-
-
Mechanical Specifications
Mounting Note: When mounting ensure entire ceramic portion of case is mounted on a clean, flat heat sink with an appropriate
thermal interface, such as thermal grease. For screw mounting use of a compression washer at a force of 150 to 300lbs (665 to
1330N) is recommended without exceeding mounting torque of 8 in-lbs (0.9 N-m) to avoid package damage. For clip mounting use
of a round or smooth clip in contact area is recommended to avoid a concentrated hot spot on package.
Free Air Power Rating 3W in free air at 25ºC 2.25W in free air at 25ºC 2.5W in free air at 25ºC 3W in free air at 25ºC 3.5W in free air at 25ºC
TR20 TR30 TR35 TR100TR50
The case temperature is to be used for the definition of the applied power limit
The case temperature measurement must be made with a thermocouple contacting the center of the component mounted on the designed heat sink
TR50/100 must be mounted to head sink using proper mounting clip for efficient heat dissipation
Electrical Thermal Characteristics