1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 176 f and r series heatsinks for to-218, to-220 and to-247 devices height surface thermal heatsink (in. .010 / area res.* part number mm .25 ) for package type ohmite resistor series (mm 2 ) weight (g) (c/w) ra-t2x-25e 1.0/25.4 to-220, -218, -247 tbh25,tch35, teh70, teh100 8,901 25 4.8 ra-t2x-38e 1.5/38.1 to-220, -218, -247 tbh25,tch35, teh70, teh100 12,983 38 3.9 ra-t2x-51e 2.0/50.8 to-220, -218, -247 tbh25,tch35, teh70, teh100 17,065 51 3.5 ra-t2x-64e 2.5/63.5 to-220, -218, -247 tbh25,tch35, teh70, teh100 21,148 63 3.1 fa-t220-25e 1.0 / 25.4 to-220, -218, -247 tbh25,tch35, teh70, teh100 9,285 18 4.7 fa-t220-38e 1.5 / 38.1 to-220, -218, -247 tbh25,tch35, teh70, teh100 13,756 27 3.8 fa-t220-51e 2.0 / 50.8 to-220, -218, -247 tbh25,tch35, teh70, teh100 18,222 37 3.4 fa-t220-64e 2.5 / 63.5 to-220, -218, -247 tbh25,tch35, teh70, teh100 22,814 46 3 *natural convection heat dissipation finish black anodized material 6063-t5 aluminum solder 100% tin (sn) pc board attachement 0.091 dia. pre-tinned pins. 300 100 200 600 400 500 900 700 800 50 heat dissipated (watts) 30 10 0 4 2 0 10 8 6 16 18 14 12 40 20 20 100 0 1000 air velocity (ft./min.) h = 1" h = 1.5" h = 2" h = 2.5" 60 90 70 80 2.5 1.5 0.5 0 2 1 5 3 4.5 3.5 4 thermal resistance from mounting surface to ambient (c/watts) mounting surface te mp. rise above ambient (c) 300 100 200 600 400 500 900 700 800 50 heat dissipated (watts) 30 10 0 4 2 0 10 8 6 16 18 14 12 40 20 20 100 0 1000 air velocity (ft./min.) h = 1" h = 1.5" h = 2" h = 2.5" 60 90 70 80 2.5 1.5 0.5 0 2 1 5 3 4.5 3.5 4 thermal resistance from mounting surface to ambient (c/watts) mounting surface te mp. rise above ambient (c) f series r series featu res ? for vertical mounting with solderable pins ? for to-220, to-218, to-247 characteristics serie s specif ications (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 177 1.638" (41.6mm) 0.059" (1.5mm) ?0.14" (3.6mm) (no top hole on fa-t220-25e) 1.000" (25.4mm) 0.669" (17.0mm +0.2/-0) 0.437" (11.1mm) ?0.091" (2.3mm) 0.98" (25.0mm) h 0.56mm 0.720" (18.3mm) 0.196" (5.00mm) 0.138" (3.5mm +.3/-.1) 1.000" (25.4mm 0.25) height (in. .010 / part number mm .25) ra-t2x-25e 1.0/25.4 ra-t2x-38e 1.5/38.1 ra-t2x-51e 2.0/50.8 ra-t2x-64e 2.5/63.5 fa-t220-25e 1.0 / 25.4 fa-t220-38e 1.5 / 38.1 fa-t220-51e 2.0 / 50.8 fa-t220-64e 2.5 / 63.5 standard part numbers part number description packaging ra-t2x-25e heat sink for to-220, to-218, to-247, black anodized bulk ra-t2x-38e heat sink for to-220, to-218, to-247, black anodized bulk ra-t2x-51e heat sink for to-220, to-218, to-247, black anodized bulk ra-t2x-64e heat sink for to-220, to-218, to-247, black anodized bulk fa-t220-25e heat sink for to-220, to-218, to-247, black anodized bulk fa-t220-38e heat sink for to-220, to-218, to-247, black anodized bulk fa-t220-51e heat sink for to-220, to-218, to-247, black anodized bulk fa-t220-64e heat sink for to-220, to-218, to-247, black anodized bulk ra-t2x-25e series f or r t2x = r series t220 = f series height (mm) finish a = black anodized v = degreased rohs complian t 0.47" (12.0mm) ?0.14" (3.6mm) 0.75" (19.1mm) 0.98" (25.0mm) 1.65" (42.0mm) h 0.56mm 0.98" (25.0mm) 1.000" (25.4mm 0.25) ?0.091" (2.3mm) f series r series notice: dimensional change. dimensions shown are for products pro- duced after september 2012 f and r series heatsinks for to-218, to-220 and to-247 devices diensions (in./mm)
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