E Series Heatsinks
For TO-220 devices
0.138"
(ꢂ.50mm +.ꢀ0/-.10ꢁ
ø0.098"
(ꢀ.50mmꢁ
1.00"
(ꢀ5.40mmꢁ
0.630"
(16.00mm .ꢀ0ꢁ
0.437"
(11.10mm .ꢂ0ꢁ
0.055"
(1.40mmꢁ
1.378"
(ꢂ5.00mm .ꢀ0ꢁ
0.689"
(17.50mm .15ꢁ
0.370"
(9.40mm .ꢀ0ꢁ
0.50"
(1ꢀ.70mmꢁ
ø0.142"
(ꢂ.60mm +.10/-0ꢁ
0.531"
(1ꢂ.50mm .ꢀ0ꢁ
F E A T ꢃ R E S
• Vertical through-hole PCB
mounting
• 0.142 in. diameter mounting
holes (3)
0.720"
(18.ꢂ0mm .ꢀ0ꢁ
1.00"
(ꢀ5.40mm .ꢀ0ꢁ
Height H
S P E C ꢂ F ꢂ C A T ꢂ O N S
Heat sink: Aluminum 6063-T5
or equivalent with either black
anodized or degreased finish
Solder feet: Tin plated brass
Interface thermal resistance:
for improvement, use thermal
joint compound or 0.005 Grafoil
(TGon 800 by Laird)
For
Package
Ohmite
Resistor
Series
Surface
Thermal
Resistance*
(°C/W)
11.4
9.5
9.0
7.5
7.4
6.2
Heatsink
Height
Area
Part Number
(in. .0ꢀ0 / mm ± ±.2) Type
(in2)
Weight
EV-T220-38E
EA-T220-38E
EV-T220-5ꢀE
EA-T220-5ꢀE
EV-T220-64E
EA-T220-64E
1.5 / 38.10
2.0 / 50.80
2.5 / 63.50
TO-220
TBH25, TCH35
TBH25, TCH35
TBH25, TCH35
11.5
15.2
18.8
0.63 oz/18g
TO-220
TO-220
0.85 oz/24g
1.06 oz/30g
Interface electrical isolation:
Sil-Pad 900S by Bergquist or
equivalent
*Natural convection at 10W dissipation
H E A T ꢁ ꢂ S S ꢂ P A T ꢂ O N
L A N ꢁ P A T T E R N
Air Velocity (ft./min.)
400 600
0.500"
0
200
-E38
800
1000
10
(12.70mm)
100
80
60
40
20
0
-E38
0.031"
8
6
4
2
0
(0.79mm)
-E51
-E51
ø 0.105"
(2.67mm)
-E64
Device
Center
Line
-E64
O R D E R I N G I N F O R M AT I O N
Package type
to be heatsinked RoHS Compliant
0
2
4
6
8
10
Series
Heat Dissipated (watts)
E V - T 2 2 0 - 5 1 E
Finish
A = black anodized
V = degreased
Height
(mm)
S TA N D A R D p A R T N u M b E R S F O R E S E R I E S
Part Number
ꢁescription
Packaging
EV-T220-38E
EA-T220-38E
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Bulk
Bulk
EV-T220-51E
EA-T220-51E
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Bulk
Bulk
EV-T220-64E
EA-T220-64E
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Bulk
Bulk
70
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com