SINK-W Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Maximum Repeatability

W Series Heatsinks
For TO-220, TO-247, and TO-264 devices
T220-101E
T247-101E
T264-101E
DT2-101E
The unique design (patent pending) of the W Series
heat sinks combines a tin plated, solderable, inte-
gral spring clip with an extruded aluminum 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 center of the device to enhance thermal perfor-
mance.
F e at u r e s
• Reduced Assembly Cost: spring clip and auto-align
feature makes fasteners and fixtures obsolete,
along with stray metal filings from tapped holes
• Maximum Repeatability: clamping force of the
spring clip is not degraded by repeated loading and
unloading
• Maximum Heat Transfer per Unit Space: maximum
surface area per unit volume and consistent mount-
ing force reduces thermal resistance
• Maximum Resistance to Shock and Vibration: light
weight, resilient spring clip locks the component in
place and is highly resistant to shock and vibration
• Maximum Reliability: helps prevent short circuits
by eliminating metal particles from thread tapping
• RoHS Compliant
S ERIE S S P ECI F ICATI O N S
Heatsink
For Package Ohmite Resistor Surface Area
Part Number
Type
Series
(in²)
Weight
WA-T220-101E _{TO-220 TBH25, TCH35}
6.5 0.35 oz/10g
WV-T220-101E
WA-T247-101E _{TO-247 TEH70, TEH100}
8.4 0.42 oz/12g
WV-T247-101E
WA-T264-101E _TO-264
TFH85
8.4 0.42 oz/12g
WV-T264-101E
WA-DT2-101E TO-220 TBH25, TCH35,
15.1 0.79 oz/22g
WV-DT2-101E & TO-247 TEH70, TEH100
*Natural convection at 10W heat dissipation
Thermal
Resistance*
Rs-a=12°C/W
Rs-a=13°C/W
Rs-a=11°C/W
Rs-a=12°C/W
Rs-a=11°C/W
Rs-a=12°C/W
Rs-a=7°C/W
Rs-a=8°C/W
characteristics
Heat Sink Aluminum alloy 6063-T5 or equivalent.
Spring Clip Music wire, per ASTM A228
Pin Solderable 100% tin over copper strike
Interface thermal for improvement, use thermal joint com-
resistance pound or 0.005 Grafoil (TGon 800 by
Laird)
Interface electrical Sil-Pad 900S by Bergquist or equivalent
isolation
Mounting Vertical thru-hole mount
Clip Force 13.2 lbf.
Patent
Pending
180
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]
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