VM Series Variable Mount Heatsink Series Ohmite introduces this new versatile heatsink design. This new design can accommodate several different industry packages. This design also lets the customer choose a mounting style using screws or clips for secure mounting to the heatsink. These one of a kind heatsinks are offered in a vertical (free convection cooling) or horizontal format (forced convection cooling) to fit customer applications. Horizonral Mounting Style Vertical Mounting Style S ERIE S S P ECI F ICATI O N S Heatsink Surface Area Weight Length L or Surface Part Number Mount (in2 / mm2) (oz / g) Height H (mm) Finish VM1-038-1AE vertical VM2-038-1AE horizontal 39.6 / 25,546 1.48 / 42 38.6 anodized VM3-038-1AE universal characteristics Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized finish Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS compliant. Barbed for secure attachment Interface Thermal for improvement, use thermal joint compound, 0.005 Grafoil Resistance (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 Heat Dissipation Air Velocity (ft./min.) 0 100 200 300 400 500 600 700 800 1.6 70 1.4 60 1.2 50 1.0 40 0.8 30 0.6 20 0.4 10 0.2 0 0 5 10 15 Heat Dissipated (watts) 20 Thermal Resistance from Mounting Surface to Ambient (°C/watts) Mounting Surface Temp. Rise above Ambient (°C) 80 0 (continued) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 169 VM Series Variable Mount Heatsink Series d i m e ns i ons 0.98" (25mm) 1.08" (27.5mm) Horizontal Configuration Vertical Configuration 0.42" (10.6mm) 1.52" (38.6mm) (in./mm) 0.08" (2mm) 1.52" (38.6mm) 1.56" (39.6mm) 2.36" (60.0mm) ø0.105" pth (2.67mm) user defined 0.73" (18.6mm) 0.138" (3.5mm) 1.36" (34.6mm) 1.56" (39.6mm) Vertical Configuration 0.42" (10.6mm) ø0.142" (3.6mm) 1.52" (38.6mm) 0.98" (25mm) rizontal Configuration 0.08" (2mm) 1.52" (38.6mm) 1.56" (39.6mm) 2.36" (60.0mm) " pth 7mm) user defined 0.73" (18.6mm) 0.138" (3.5mm) 0.091" (2.3mm) 1.56" (39.6mm) 1.72" (43.8mm) 0.157" (4.0mm) 1.36" (34.6mm) 0.98" (25.0mm) ø0.105" pth (2.67mm) 1.52" 8.6mm) 0.08" (2.0mm) 2.36" (60.0mm) 0.08" (2.0mm) how to order Finish A = black anodized V = degreased VM1-038-1AE Length Series Mount 1 = Vertical (mm) 2 = Horizontal 3 = Universal 170 RoHS compliant Configuration 1 = 1 hole (TO-247, TO-220) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] (4 0.157" (4.0mm) 1.52" (38.6mm) 0.98" (25.0mm) ø0.105" pth (2.67mm) 0.091" (2.3mm) (6