Universal 678 Series Vertical Heat Sink for Power Devices 678-39-S & 678-39-C Part Number Description Length Width Thermal Resistance Forced Air Flow Universal Heat Sink for TO Devices w/Screw 1.520 2.362 678-39-S Hole, Black Anodize (38.61m m) (60.00m m) 0.6C/W 600 LFM Universal Heat Sink for TO Devices w/ Clip, 1.520 2.362 678-39-C Black Anodize (38.61m m) (60.00m m) 0.6C/W 600 LFM Wakefield-Vette introduces Universal 678 series, high performance, low cost and versatile heat sink with screw or clip for all kinds of standard packages. This type of heat sink provides both vertical and horizontal mounting options on PCB to accommodate natural and forced convection cooling method. SPECIFICATIONS 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. Insulator ( Optional): t-Global H48-1, L37-3F and H48-6S. The thickness of the insulating material not to exceed 10 mil ( 0.01). FEATURES AND BENIFITS Minimum assembly cost and labor- Spring Clips make the mounting holes and fasteners obsolete in assembly operations & reduce costs. Design Flexibility- Universal mountable and one fits all give designers total freedom to fit their packaging designs with ideal device pak style and to orient the heat sink to meet their power dissipations with optimized cooling method. (see page 2 of data sheet) THERMAL PERFORMANCE www.wakefield-vette.com Page 1 of 2Universal 678 Series Vertical Heat Sink for Power Devices 678-39-S & 678-39-C Part Number Description Length Width Thermal Resistance Forced Air Flow Universal Heat Sink for TO Devices w/Screw 1.520 2.362 678-39-S Hole, Black Anodize (38.61m m) (60.00m m) 0.6C/W 600 LFM Universal Heat Sink for TO Devices w/ Clip, 1.520 2.362 678-39-C Black Anodize (38.61m m) (60.00m m) 0.6C/W 600 LFM One Heat Sink for all Packages CPC40055ST Package SOT-227 Package CPC1998J Package Board level 2 solder pins Board level 2 solder pins System level 2 screws Natural convection Vertical Natural convection Vertical Natural convection Vertical Spring Clip Spring Clip L4970A Package CPC1968 and TO-264 Package Board level 2 solder pins Board level 2 solder pins Natural convection Vertical Natural convection Vertical Spring Clip Screw attachment TO-247 and TO-220 Package KBU Package Board level 2 solder pins Board level 2 solder pins Natural convection Vertical Natural convection Vertical Screw attachment or Spring Clip Screw attachment or Spring Clip www.wakefield-vette.com Page 2 of 2