W-SERIES Datasheet, PDF (1/1 Pages) Ohmite Mfg. Co. – The unique design (patent pending) of the W Series

W Series Heatsinks
For TO-220, TO-247, and TO-264 devices
T220 0.72" (18.3mm) 0.63"
T247, T264 0.92" (23.4mm) (16.0mm)
Patent
Pending
T220
1.20"
(30.5mm)
T247, T264
1.20-1.26"
(30.5-32.0mm)
0.14"
(3.6mm)
T220 0.50" (12.7mm) Pin diameter
T247, T264 0.71" (18.0mm) 0.06" (1.5mm)
T220-101E
T247-101E
T264-101E
DT2-101E
For
Ohmite
Heatsink Package Resistor
Part Number Type Series
Surface
Area
Thermal
(in²) Weight Resistance*
WWAV--TT222200--110011EE ^TO-220
TBH25, TCH35
6.5
0.35 oz/10g
Rs-a=12°C/W
Rs-a=13°C/W
WWAV--TT224477--110011EE _TO-247
TEH70, TEH100
8.4
0.42 oz/12g
Rs-a=11°C/W
Rs-a=12°C/W
WWAV--TT226644--110011EE ^{TO-264 TFH85}
8.4
0.42 oz/12g
Rs-a=11°C/W
Rs-a=12°C/W
WA-DT2-101E
WV-DT2-101E
TO-220 TBH25, TCH35,
& TO-247 TEH70, TEH100
15.1 0.79 oz/22g
Rs-a=7°C/W
Rs-a=8°C/W
*Natural convection at 10W heat dissipation
land pattern
0.63"
(16.0mm)
0.08"
(2.0mm)
T220
0.72"
(18.3mm)
T247
0.92"
(23.4mm)
T264
0.92"
(23.4mm)
0.59"
(15.0mm)
0.785"
(19.4mm)
0.80"
(20.2mm)
0.500"
(12.7mm)
0.711"
(18.1mm)
0.711"
(18.1mm)
ø 0.050"
(1.3mm)
CL
0.06"
(1.5mm)
ø 0.080"
(2.0mm)
DT2
0.18"
(4.6mm)
ø 0.050" typ.
(1.3mm)
ø 0.080"
(2.0mm) _{0.27" 0.18"}
(6.9mm) (4.6mm)
1.71" (43.4mm)
0.500"
0.711"
(12.7mm)
(18.1mm)
0.08"
CL
(2.0mm)
0.63"
(16.0mm)
0.28"
(16mm)
0.89" (22.6mm)
0.59"
(15mm)
0.785"
(19.4mm)
The unique design (patent pending) of the W Series heat sinks
combines a tin plated, solderable, integral 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 packag-
es. 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 performance.
Features
• Reduced Assembly Cost:
spring clip and auto-align feature
makes fasteners and fixtures
obsolete, along with stray metal
filings from tapped holes
• Maximum Repeatability: clamp-
ing 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 con-
sistent mounting 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
Heat Dissipation
• Maximum Reliability: helps pre-
vent short circuits by eliminating
metal particles from thread tap-
ping
• RoHS Compliant
Specifications
Heat Sink: Aluminum alloy 6063-
T5 or equivalent.
Spring Clip: Music wire, per
ASTM A228
Pin: Solderable 100% tin over
copper strike
Interface thermal resistance:
for improvement, use thermal
joint compound or 0.005 Grafoil
(TGon 800 by Laird)
Interface electrical isolation:
Sil-Pad 900S by Bergquist or
equivalent
Mounting: Vertical thru-hole
mount
Clip Force: 13.2 lbf.
T220-101E, T247-101E and T264-10^A1^irE^{Velocity (ft./min.)}
200
400
600
800
250
Air Flow
200
Side to Side
T220-101E
T247-101E,
T264-101E
150
1000
14
12
10
8
100
6
Free
Air
4
50
Air Flow
along Fins
2
0
0
2
DT2-101E
100
140
120
100
80
60
Air Flow
along Fins
40
20
4
8
12
16
Heat Dissipated (watts)
Air Velocity (ft./min.)
200
400
600
800
Air Flow
Side to Side
DT2-101E
Free
Air
0
20
1000
12
10
8
6
4
2
0
0
0
2
4
8
12
16
20
Heat Dissipated (watts)
Standard part numbers For W Series
Part Number Description Packaging
WA-T220-101E Heat sink for TO-220, black anodized
Bulk
WV-T220-101E Heat sink for TO-220, no finish (degreased)
Bulk
WA-T247-101E Heat sink for TO-247, black anodized
Bulk
WV-T247-101E Heat sink for TO-247, no finish (degreased)
Bulk
WA-T264-101E Heat sink for TO-264, black anodized
Bulk
WV-T264-101E Heat sink for TO-264, no finish (degreased)
Bulk
WA-DT2-101E Heat sink for TO-247 &TO-220, black anodized
Bulk
WV-DT2-101E Heat sink for TO-247 &TO-220, no finish (degreased) Bulk
72 Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]