1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 169 c40 heat sink system for to-247, to-264 and sot-227 packages the c40 series heat sink system (patent pending) offers flexible, high performance and compact heat sinks with an exchangeable cam clip system for to- 247, to-264 and sot-227 (clip in development) devices. this powerful heat sink can be thru-hole soldered in single or paired configurations. the paired unit has mounting holes to accomodate a 40mm x 40mm fan. it is the ideal type of heat sink for high power density and small size (1u or 2u) electronic packaging with forced convection. paired heat sink mounting with a fan single mounting characteristics heat sink aluminum alloy 6063-t5 or equivalent with either degreased or black anodized finish. spring clip music wire, per astm a228 with bright nickel plating solder foot cold-rolled steel, per astm a-366 with pure tin over copper strike. rohs compliant. fan 40mm fan with 4 self-tapping m3 screws interface thermal resistance for improvement, use thermal joint compound, 0.005 grafoil (tgon 800 by laird), or phase change material (hi-flow by bergquist) insulator (optional) sil-pad 900-s, k6 800-s and k10 by bergquist heatsink surface area weight length l part number (in 2 / mm 2 ) (oz / g) (mm) c40-058-ve 63.8 / 41,180 2.5/ 71 58 C40-058-AE serie s specific ations consult factory for alternate lengths and clip combinations fan flow rate (cfm) 10 20 30 0 thermal resistance from case to ambient per device (c/watts) 2 0 2.5 3 1.5 1 0.5 2 devices 4 devices heat dissipation (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 170 dimensions ho w to order c40 heat sink system for to-247, to-264 and sot-227 packages 4x ? 0.11" pth (2.8mm) 1.72" (43.8mm) 2.52" (64.0mm) 1.26" (32.0mm) 1.82" (46.3mm) 1.18" (29.9mm) 1.37" (34.7mm) 1.82" (46.3mm) 0.79" (20mm) 0.10" (2.5mm) 0.10" (2.6mm) 1.26" (32mm) 0.47" (12mm) 1.18" (29.9mm) 0.58" (14.6mm) l y x 2x 0.08" (2.0mm) 2x 0.08" (2.0mm) 2x 0.18" (4.06mm) 2x 0.10" (2.5mm) l ? 0.16" (0.16mm) l ? 0.16" (0.16mm) l back-to-back configuration (this configuration can accept a 40x40mm fan) single mounting clip dimensions land pattern land pattern 2x ? 0.11" pth (2.8mm) 6x ? 0.07" pth (1.8mm) l y x 2x 0.08" (2.0mm) 0.18" (4.06mm) l ? 0.16" (0.16mm) 0.43" (11mm) w +0.12" (+3.0mm) w 0.78" (19.8mm) 1.39" ref (35.3mm) "w" t247 0.63" (16.1mm) t264 0.80" (20.2mm) note: due to possible screw torquing on long extrusions, customer should check for coplanarity prior to final assembly or soldering. series length (mm) finish a = black anodized v = degreased rohs compliant C40-058-AE clip series device type t247 = to-247 t264 = to-264 s227 = sot-227 (in development) standard configuration rohs compliant cla-t247-21e heatsink clip
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