E2A-T220-25E Ohmite

EX Series Heatsinks For TO-220 and TO-247 devices and bridge rectifiers FEaturES Vertical through-hole PCB mounting E3A-T220-25E has a 8-32 threaded mounting hole for a bridge rectifier in a D34 type square package The thickened side fins can be used to secure the heat sink to a side wall or to mount TO-220 s Threaded mounting holes SEriES SPEciFicatiONS For Ohmite Surface Thermal Heatsink Package Resistor Area Weight Resistance* 2 2 Part Number Type Series (in /mm ) (oz./g) (C/W) E2A-T220-38E TO-220 TBH, TCH 7.96 / 5129 0.40 / 11.21 14.0 E2A-T220-25E TO-220 TBH, TCH 5.30 / 2419 0.26 / 7.5 16.4 E2A-T247-38E TO-247 TEH100 7.95 / 5129 0.40 / 11.21 14.0 E3A-T220-25E D34 9.4 / 6064 0.60 / 17.0 12.4 *Natural convection at 5W dissipation cHaractEriSticS Heat Dissipation Aluminum 6063-T5 or equiv- Heat sink alent with either black anod- Air Velocity (ft./min.) ized or degreased finish 0 100 200 300 400 500 600 700 800 900 1000 100 10 Solder feet steel tin plated 90 9 Interface for improvement, use thermal 80 8 thermal joint compound or 0.005 70 7 resistance Grafoil (TGon 800 by Laird) E2A-T220-25AE 60 6 Interface Sil-Pad 900S by Bergquist or E2A-T220-38AE 50 E2A-T247-38AE 5 electrical equivalent E3A-T220-25AE isolation 40 4 30 3 20 2 10 1 0 0 0 1 2 3 4 5 6 7 8 9 10 Heat Dissipated (watts) (continued) 172 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com Mounting Surface Temp. Rise above Ambient (C) Thermal Resistance from Mounting Surface to Ambient (C/watts)EX Series Heatsinks For TO-220 and TO-247 devices and bridge rectifiers dimENSiONS in. (mm) 6-32 tap thru Tin-plated steel pins 0.090 (2.3mm) 0.64 (16.3mm) 0.40 0.160 REF. E2A-T220-38E (10.2mm) 0.136 .010 0.72 (3.45mm .25) (18.3mm) 0.156 0.64 1.50 1.50 (4.0mm) (16.3mm) (38.1mm)(38.1mm) 6-32 thread thru Tin-plated steel pins 0.090 (2.3mm) 0.64 (16.3mm) E2A-T220-25E 0.160 REF. 0.40 (10.2mm) 0.136 .010 0.72 (3.45mm .25) (18.3mm) 0.156 0.64 1.00 (4.0mm) (16.3mm) (25.4mm) 6-32 tap thru 0.090 (2.3mm) 0.64 (16.3mm) E2A-T247-38E 0.40 (10.2mm) 0.320 0.850 0.136 .010 (21.6mm) (3.45mm .25) 0.64 0.156 1.500 (16.3mm) (4.0mm) (38.1mm) 0.164 hole 8-32 UNC-2B thread, thru 1.00 (25.4mm) E3A-T220-25E 0.50 (12.7mm) 0.50 (12.7mm) 1.00 1.00 (25.4mm) (25.4mm) OrdEriNg iNFOrmatiON Extrusion type RoHS Compliant E2A-T220-38E Series Finish Package Height EX A = anodized type 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 173