WV Series Heatsinks
For TO-220 and TO-247 devices
T220
0.72"
(18.3mm)
T247
0.92"
(23.4mm)
0.63"
(16.0mm)
T220
1.20"
(30.5mm)
T247
1.20-1.26"
(30.5-32.0mm)
0.14"
(3.6mm)
T220
0.50"
(12.7mm)
T247
0.71"
(18.0mm)
Ohmite Manufacturing has
launched a series of heatsink
solutions for use with our
popular TO-220 and TO-247
power resistors, or similarly
packaged semiconductors.
These self aligning heatsinks
feature solderable feet for
through-hole placement, and
an integrated clip which pro-
vides 13.2 (lbf) of force on the
center of the resistor, enhanc-
ing thermal performance and
reducing parts count and
assembly time.
SPEciFicATiONS
Heat Sink:
Aluminum alloy 6063-
T5 or equivalent. Copper alloy
C110 or equivalent
Spring Clip:
Music wire, per
ASTM A228
Foot:
Cold-rolled steel, per ASTM
A366, commercial quality or
equivalent
Insulator:
(optional) Sil-pad
900-S, K6 800-S, and K10, or
equivalent
Mounting:
thru-hole, vertical
Suggested Sil Pad:
Sil-Pad 900S
(Manufactured by Bergquist)
Clip Force:
13.2 lbf.
Heatsink
Part Number
WV-T220-101E
WV-T247-101E
For
Package
Type
TO-220
TO-247
Ohmite
Resistor
Series
TBH25, TCH35
TEH70
Surface
Area
Thermal
(in
2
)
Weight Resistance*
6.5 0.35 oz/10g R
s-a
=10°C/W
8.4 0.42 oz/12g R
s-a
=7°C/W
*Natural convection
WV-T220-101E
WV-T247-101E
Ohmite Mfg. Co.
1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
1
OHMITE [ OHMITE MFG. CO. ]
