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PDFs and Datasheets M Series Heatsinks Datasheet

M Series Heatsinks Datasheet

Tubular High Energy Bulk Ceramic

M Series Heatsink product image

 

Ohmite introduces the M series,  patented (Pat. No. 7,151,669), high performance, low cost, configurable, scalable and compact heat sink with matrix clip system for TO-247 and TO-264 packages. This powerful heat sink provides the easiest assembly, largest surface area and smallest footprint. It is the ideal type of heat sink for high power density and small size (1U or 2U) electronic packaging with forced convection cooling.

Features

  • Minimum assembly cost and labor. Spring Clips make the mounting holes and fasteners obsolete in assembly operations & reduce costs.
  • Maximum Thermal Transfer. Maximum surface 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. Prevent short circuit by eliminating metal particles generated from hardware or thread tapping.
  • Design Flexibility. Maximum flexibility for dynamic device locations and power up grading. “Configureto-Fit” & “Scale-to-Meet” options give designers the total freedom to configure the heat sink to fit their packaging designs and to scale the heat sink to meet their power dissipations.

Specifications

Surface Area (in^2/mm^2):

45 / 29,097

Weight (oz./g):

2.2 / 63

Thermal Resistance (°c/w)*:

6.0

Surface Area (in^2/mm^2):

45 / 29,097

Weight (oz./g):

2.2 / 63

Thermal Resistance (°c/w)*:

5.2

Surface Area (in^2/mm^2):

22 / 14,284

Weight (oz./g):

1.1 / 31

Thermal Resistance (°c/w)*:

9.6

Surface Area (in^2/mm^2):

22 / 14,284

Weight (oz./g):

1.1 / 31

Thermal Resistance (°c/w)*:

8.0

Surface Area (in^2/mm^2):

76 / 49,218

Weight (oz./g):

4.7 / 134

Thermal Resistance (°c/w)*:

3.6

Surface Area (in^2/mm^2):

76 / 49,218

Weight (oz./g):

4.7 / 134

Thermal Resistance (°c/w)*:

3.0

Surface Area (in^2/mm^2):

37.3 / 24,161

Weight (oz./g):

2.3 / 66

Thermal Resistance (°c/w)*:

5.5

Surface Area (in^2/mm^2):

37.3 / 24,161

Weight (oz./g):

2.3 / 66

Thermal Resistance (°c/w)*:

4.6

 

* R-theta(c-a) for 18W dissipation total for two devices in natural convection
† Discontinued

Characteristics

Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized finish.

Music Wire, Per ASTM A228 with bright nickel plating.

Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS compliant.

Thermal joint compound or 0.005 Grafoil (TGon 800 by Laird).

Sil-Pad 900S by Bergquist or equivalent.

 

*When required, Type SP material can withstand short periods of use at red-heat conditions, i.e. up to 550°C to 600°C

Heat Dissipation

For two devices

M Series Heatsink heat dissipation chart

Dimensions

M Series Heatsink Dimensions
M Series Heatsink Dimensions
M Series Heatsink Dimensions
M Series Heatsink Dimensions

W: 1.35" / 34.3

V: 0.95" / 24.1

Z*: 0.18" / 4.6

W: 1.35" / 34.3

V: 0.95" / 24.1

Z*: 0.18" / 4.6

W: 1.35" / 34.3

V: 0.95" / 24.1

Z*: 0.18" / 4.6

W: 1.35" / 34.3

V: 0.95" / 24.1

Z*: 0.18" / 4.6

W: 2.20" / 55.9

V: 1.04" / 26.4

Z*: 0.21" / 5.3

W: 2.20" / 55.9

V: 1.04" / 26.4

Z*: 0.21" / 5.3

W: 2.20" / 55.9

V: 1.04" / 26.4

Z*: 0.21" / 5.3

W: 2.20" / 55.9

V: 1.04" / 26.4

Z*: 0.21" / 5.3

 

*Device package dimensions can vary. Customer should verify this dimension.

Ordering Information

M Series Heatsink Ordering Info

 

Standard Part Numbers

Description:

55mm No finish (degreased)

Packaging:

Bulk

Description:

55mm Black anodized

Packaging:

Bulk

Description:

27mm No finish (degreased)

Packaging:

Bulk

Description:

27mm Black anodized

Packaging:

Bulk

Description:

55mm No finish (degreased)

Packaging:

Bulk

Description:

55mm Black anodized

Packaging:

Bulk

Description:

27mm No finish (degreased)

Packaging:

Bulk

Description:

27mm Black anodized

Packaging:

Bulk

†Discontinued

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