E Series Heatsinks
For TO-220 devices
0.138"
(3.50mm +.20/-.10)
ø0.098"
(2.50mm)
1.00"
(25.40mm)
0.055"
(1.40mm)
0.630"
(16.00mm ±.20)
1.378"
(35.00mm ±.20)
0.437"
(11.10mm ±.30)
0.689"
(17.50mm ±.15)
ø0.142"
(3.60mm +.10/-0)
0.370"
(9.40mm ±.20)
0.531"
(13.50mm ±.20)
0.720"
(18.30mm ±.20)
1.00"
(25.40mm ±.20)
0.50"
(12.70mm)
FEATuRES
• Vertical through-hole PCB
mounting
• 0.142 in. diameter mounting
holes (3)
Height H
SPECiFiCATiONS
Heatsink
Part Number
EV-T220-38E
EA-T220-38E
EV-T220-51E
EA-T220-51E
EV-T220-64E
EA-T220-64E
Height
(in. ±.010 /
mm ±.25)
1.5 /
38.10
2.0 /
50.80
2.5 /
63.50
For
Package
Type
TO-220
TO-220
TO-220
Ohmite
Resistor
Series
TBH25, TCH35
TBH25, TCH35
TBH25, TCH35
Surface
Area
(in
2
)
Thermal
Resistance*
Weight
(°C/W)
11.5
0.63 oz/18g 11.4
9.5
15.2
0.85 oz/24g 9.0
7.5
18.8
1.06 oz/30g 7.4
6.2
*Natural convection at 10W dissipation
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)
Interface electrical isolation:
Sil-Pad 900S by Bergquist or
equivalent
LANd PATTERN
0.500"
(12.70mm)
0.031"
(0.79mm)
ø 0.105"
(2.67mm)
Device
Center
Line
HEAT diSSiPATiON
Mounting Surf. Temp. Rise above Ambient (°C)
100
0
200
-E38
-E38
80
-E51
60
-E64
40
-E64
4
-E51
6
Air Velocity (ft./min.)
400
600
800
1000
10
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
8
O R D E R I N G I N F O R M AT I O N
Package type
to be heatsinked
20
2
0
0
2
4
6
Heat Dissipated (watts)
8
10
0
Series
RoHS Compliant
EV-T220-51E
Finish
A = black anodized
V = degreased
Height
(mm)
S TA N D A R D pA RT N u M b E R S F O R E S E R I E S
Part Number
EV-T220-38E
EA-T220-38E
EV-T220-51E
EA-T220-51E
EV-T220-64E
EA-T220-64E
description
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Heat sink for TO-220, no finish (degreased)
Heat sink for TO-220, black anodized
Packaging
Bulk
Bulk
Bulk
Bulk
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
OHMITE [ OHMITE MFG. CO. ]
