WC Series Heatsinks
For TO-220, TO-247, and TO-264 devices
F e at u r e S
The unique design (patent pending) of the WC Series
heat sinks combines a tin plated, solderable, integral
cam clip with an compressed ceramic heat sink body
for an all-in-one solution to through-hole mounting
of TO-220, TO-247, and TO-264 packages. These
self-aligning heat sinks feature solderable feet and
an integrated clip with 13.2 (lbf) of force on the cen-
ter of the device to enhance thermal performance.
• Reduced assembly cost: cam clip and auto-align
feature makes fasteners and fixtures obsolete
• Maximum repeatability: clamping force of the
cam clip is not degraded by repeated loading and
unloading
• Great electrical characteristics: ceramic material
provides great electrical isolation while offering
thermal performance similar to aluminum heatsinks
• Maximum resistance to shock and vibration: light
weight, resilient cam clip locks the component in
place and is highly resistant to shock and vibration
S e r i e S S P e C i F i C at i O N S
Heatsink
Part Number
WC-T2X-38E
* at 12 watts
For Package
Type
TO-220 , TO-247,
TO-264
Ohmite Resistor
Series
TBH25, TCH35,
TEH100
Surface Area
Thermal
2
)
(in
Weight
Resistance*
17.3
1.48 oz/42g 12°C/W
CHaraCteriStiCS
Heat Sink
95% Al
2
O
3
Spring Clip
Music wire, per ASTM A228
Interface thermal resistance
for improvement, use thermal joint com-
pound or 0.005 Grafoil (TGon 800 by Laird)
Mounting
Vertical thru-hole mount
Clip Force
13.2 lbf.
Dielectric withstanding voltage
4KV (from clip to device)
Heat Dissipation
Air Velocity (ft./min.)
200
160
Mounting Surface
Temp. Rise aboveAmbient (°C)
140
120
100
80
60
40
20
0
0
6
12
Heat Dissipated (watts)
16.5
3
4
5
6
350
550
800
7
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
Heat Dissipation: Aluminum vs. Ceramic
160
140
Case Temp Rise Above
Ambient in Free Air (°C)
120
100
80
60
40
20
0
0
2
4
6
8
10
12
14
Heat Dissipated (watts)
16
18
20
WC-T2X-38E
(ceramic)
R2A-CT4-38E
(aluminum)
(continued)
180
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