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