E Series Heatsinks For TO-220 devices 0.138" (3.50mm +.20/-.10) ø0.098" (2.50mm) 1.00" (25.40mm) 0.437" (11.10mm ±.30) 0.055" (1.40mm) 0.689" (17.50mm ±.15) 0.370" (9.40mm ±.20) ø0.142" (3.60mm +.10/-0) 0.630" (16.00mm ±.20) 1.378" (35.00mm ±.20) 0.50" (12.70mm) 0.531" (13.50mm ±.20) 0.720" (18.30mm ±.20) 1.00" (25.40mm ±.20) F eat u res • Vertical through-hole PCB mounting • 0.142 in. diameter mounting holes (3) Height H S pec i f i cat i ons Height (in. ±.010 / mm ±.25) For Package Type Ohmite Resistor Series Surface Area (in2) Weight 1.5 / 38.10 TO-220 TBH25, TCH35 2.0 / 50.80 TO-220 TBH25, TCH35 2.5 / 63.50 TO-220 TBH25, TCH35 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 H eat D i ss i pat i on L an d P attern Mounting Surf. Temp. Rise above Ambient (°C) 0.500" (12.70mm) 0.031" (0.79mm) ø 0.105" (2.67mm) Device Center Line O R D E R I N G I N F O R M AT I O N Series Thermal Resistance* (°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 Package type to be heatsinked RoHS Compliant EV-T220-51E Finish A = black anodized V = degreased 100 0 200 Air Velocity (ft./min.) 400 600 800 -E38 1000 10 -E38 8 80 -E51 -E51 6 60 -E64 -E64 40 4 2 20 0 0 0 2 4 6 Heat Dissipated (watts) 8 Height (mm) S tandard p art n u m b ers F or E S eries Part NumberDescription 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 • [email protected] 10 Thermal Resistance from Mounting Surface to Ambient (°C/watts) Heatsink Part Number EV-T220-38E EA-T220-38E EV-T220-51E EA-T220-51E EV-T220-64E EA-T220-64E