E Series Heatsinks
For TO-220 devices
FEaturES
Vertical through-hole PCB mounting
0.142 in. diameter mounting holes (3)
SEriES SPEciFicatiONS
For Ohmite Surface Thermal
Heatsink Package Resistor Area Resistance*
2
Part Number Type Series (in ) Weight (C/W)
EV-T220-38E 11.4
TO-220 TBH25, TCH35 11.5 0.63 oz/18g
EA-T220-38E 9.5
EV-T220-51E 9.0
TO-220 TBH25, TCH35 15.2 0.85 oz/24g
EA-T220-51E 7.5
EV-T220-64E 7.4
TO-220 TBH25, TCH35 18.8 1.06 oz/30g
EA-T220-64E 6.2
*Natural convection at 10W dissipation
cHaractEriSticS
Heat Dissipation
Heat sink Aluminum 6063-T5 or equiv-
alent with either black anod-
Air Velocity (ft./min.)
ized or degreased finish
0 200 400 600 800 1000
10
100
Tin plated brass -E38
Solder feet
-E38
Interface for improvement, use thermal
80 8
thermal joint compound or 0.005
-E51
-E51
resistance Grafoil (TGon 800 by Laird)
6
60
Interface Sil-Pad 900S by Bergquist or
-E64
electrical equivalent
-E64
40 4
isolation
2
20
0 0
0 2 468 10
Heat Dissipated (watts)
(continued)
174 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com
Mounting Surf. Temp. Rise above Ambient (C)
Thermal Resistance from Mounting
Surface to Ambient (C/watts)E Series Heatsinks
For TO-220 devices
dimENSiONS
(in./mm)
0.138"
(3.50mm +.20/-.10)
0.098"
(2.50mm)
1.00"
0.630"
(25.40mm)
0.437"
(16.00mm .20)
(11.10mm .30)
0.055"
1.378"
(1.40mm)
(35.00mm .20)
0.689"
(17.50mm .15)
Height
0.50"
0.142"
Part Number (in. .010 / mm .25)
0.196"
(12.70mm)
(3.60mm +.10/-0)
(5.0mm .20)
EV-T220-38E 1.5 / 38.10
EA-T220-38E
0.720"
EV-T220-51E 2.0 / 50.80
NOTICE: Dimensional
(18.30mm .20)
EA-T220-51E
1.00"
change. Dimensions shown
EV-T220-64E 2.5 / 63.50
(25.40mm .20)
EA-T220-64E are for products produced
Height H
after July 2013
Land Pattern
0.500"
(12.70mm)
0.031"
(0.79mm)
0.105"
(2.67mm)
Device
Center
Line
OrdEriNg iNFOrmatiON
Package type
Series to be heatsinked RoHS Compliant
EV-T220-51E
Finish Height
A = black anodized (mm)
V = degreased
Standard part numbers
Part Number Description Packaging
EV-T220-38E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-38E Heat sink for TO-220, black anodized Bulk
EV-T220-51E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-51E Heat sink for TO-220, black anodized Bulk
EV-T220-64E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-64E Heat sink for TO-220, black anodized Bulk
1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com 175