C-40 Series Heatsink0 pages

heatsink

C40 Heat Sink System
The C40 Series Heat Sink System (Patent Pending)
offers flexible, high performance and compact heat
sinks with an exchangeable cam clip system for TO247, 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.

Single
Mounting

Paired Heat
Sink Mounting
With a FAN

S ERIE S S P E C I F I C ATI O N S

Heatsink
Part Number
C40-058-VE
C40-058-AE

Surface Area
(in2 / mm2)

Weight
(oz / g)

Length L
(mm)

63.8 / 41,180

2.5/ 71

58

consult factory for
alternate lengths and
clip combinations

ch a r a c t e r i s t i cs
Heat Sink

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

Spring Clip

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

3

Music Wire, Per ASTM A228 with bright nickel plating

Solder Foot

Heat Dissipation

Fan

40mm fan with 4 self-tapping M3 screws

Interface Thermal For improvement, use thermal joint compound, 0.005 Grafoil (TGon
Resistance 800 by Laird), or phase change material (Hi-Flow by Bergquist)
Insulator (Optional) Sil-Pad 900-S, K6 800-S and K10 by Bergquist

Thermal Resistance from Case to
Ambient per Device (°C/watts)

thermal
management

For TO-247, TO-264 and SOT-227 Packages

2.5
4 devices

2
1.5

2 devices
1
0.5
0
0

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

10
20
Fan Flow Rate (cfm)

30