M Series Heatsinks Heatsink with clips for TO-264 and TO-247 FeatureS Minimum assembly cost and labor. Spring Clips make the mounting holes and fasteners obsolete in assembly operations & reduce costs. Maximum Thermal Transfer. Maximum sur face area per unit volume, efficient cooling fins & consistent mounting force reduces thermal resistance Maximum Repeatability. Constant spring force over repeated assembly/disassembly Maximum Reliability. Resilient spring action locks electronic component in place. Fewer parts in assembly and no fasteners and washers required. Ohmite introduces the M series, patented (Pat. No. Prevent short circuit by eliminating metal particles 7,151,669), high per formance, low cost, configu- generated from hardware or thread tapping rable, scalable and compact heat sink with matrix clip Design Flexibility. Maximum flexibility for dynamic system for TO-247 and TO-264 packages. This pow- device locations and power up grading. Configure- er ful heat sink provides the easiest assembly, largest to-Fit & Scale-to-Meet options give designers the sur face area and smallest footprint. It is the ideal total freedom to configure the heat sink to fit their type of heat sink for high power density and small packaging designs and to scale the heat sink to size (1U or 2U) electronic packaging with forced con- meet their power dissipations. vection cooling. SerieS SpeCiFiCationS Thermal Surface Area Weight Resistance 2 2 Part No. (in /mm ) (oz./g) (c/w)* MV-102-55E 45 / 29,097 2.2 / 63 6.0 MA-102-55E 45 / 29,097 2.2 / 63 5.2 MV-101-27E 22 / 14,284 1.1 / 31 9.6 MA-101-27E 22 / 14,284 1.1 / 31 8.0 MV-302-55E 76 / 49,218 4.7 / 134 3.6 MA-302-55E 76 / 49,218 4.7 / 134 3.0 MV-301-27E 37.3 / 24,161 2.3 / 66 5.5 MA-301-27E 37.3 / 24,161 2.3 / 66 4.6 * R-theta for 18W dissipation total for two devices in natural convection c-a Discontinued CHaraCteriStiCS Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized finish. Music Wire, Per ASTM A228 with bright nickel plating Spring Clip Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS com- pliant. Interface thermal resistance Thermal joint compound or 0.005 Grafoil (TGon 800 by Laird) Sil-Pad 900S by Bergquist or equivalent Interface electrical isolation (continued) 176 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.comM Series Heatsinks Heatsink with clips for TO-264 and TO-247 Heat DiSSipation Air Velocity (ft./min.) For two devices 0 200 400 600 800 1000 1200 140 7 120 6 100 5 MA-101-27 80 4 MA-301-27 MA-102-55 60 3 MA-302-55 40 2 20 1 0 0 0 10 20 30 40 50 Heat Dissipated, total for two devices (watts) DiMenSionS user user defined values 0.07 0.07 defined C C C L L L value (1.8mm) (1.8mm) 2.20 (55.8mm) 4x 4x Y X X 0.10 0.10 (2.5mm) (2.5mm) 1.34 (34.1mm) 1.52 V V 1.71 (38.6mm) (43.5mm) -55E -27E W W Z Z -102-55E -302-55E -101-27E -301-27E 0.84 0.90 0.83 0.16 (21.3mm) 2.01 (51mm) 0.14 0.08 0.08 (22.9mm) (21.1mm) (4.2mm) (3.6mm) (2.0mm) (2.0mm) 2.17 (55mm) 1.06 (27mm) 1.04 .025 0.95 .025 (26.4mm) (24.1mm) Part Number W V Z* MV-102-55E 1.35 / 34.3 0.95 / 24.1 0.18 / 4.6 MA-102-55E *Device package MA-101-27E dimensions can MA-101-27E vary. Customer should verify MV-302-55E 2.20 / 55.9 1.04 / 26.4 0.21 / 5.3 this dimension. MA-302-55E MA-301-27E MA-301-27E How to orDer Standard Part Numbers No. of clips RoHS Compliant Part Number Description Packaging MV-102-55E MV-102-55E 55mm No finish (degreased) Bulk Series Finish Length MA-102-55E 55mm Black anodized Bulk A = black anodized (mm) V = degreased MV-101-27E 27mm No finish (degreased) Bulk MA-101-27E 27mm Black anodized Bulk MV-302-55E 55mm No finish (degreased) Bulk MA-302-55E 55mm Black anodized Bulk MV-301-27E 27mm No finish (degreased) Bulk MA-301-27E 27mm Black anodized Bulk Discontinued rev 10/21-1 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 177 Case Temp. Rise above Ambient (C) Thermal Resistance from Case to Ambient (C/watts)