Electronic Supply by Industrial Electronics in Milwaukee Wisconsin : Potter Brumfield, Radio Shack Stores in Milwaukee: Clamps Basic Information

Clamps Basic Information
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Staff  on 19/11/2009 03:47:00

We offer two types of hockey puk clamps for mounting hockey puk semiconductors
to heat sinks. Bar Clamps are used for double sided cooling applications. They
have a stack of preloaded Belleville springs which guarantees the
perpendicularity of the clamping force. An indicator washer on the spring guide
indicates when the correct clamping force is achieved. Box clamps are used for
single sided cooling applications. They use internal Belleville springs and the
proper clamping force is achieved when four corner bolts are tightened and the
box clamp housing comes in contact with the heat sink.

Our clamp configuration tool will assist with choosing the correct clamp for
your application based on the size and thickness of the disc semiconductor,
necessary clamping force and total heat sink thickness.
Bar Clamps
Box Clamps
*Easy field replacement 	*For disc semiconductors up to 150mm diameter
	*Clamping forces from 5kN to 95kN 	*No special tools need during assembly
	*Pre-calibrated for ease of use 	*RoHS compliant corrosion resistant plating
	*Insulator dielectric rating of 85KV/mm 	*For single sided cooling applications
	*For disc semiconductors up to 80mm 	*Clamping forces up 5kN to 17kN(3825 lbs.)
	*Pre-calibrated for ease of use 	*RoHS compliant corrosion resistant plating
Clamp Selection
The choice of the clamp suitable for each different application can be made
according to three main parameters. These parameters will help you choose
between heat sink clamps, SCR clamps, diode clamps, rectifier clamps, thyristor
clamps and other hockey puk clamps.
*Type of semiconductor (diameter and thickness) 	*Requested clamping force
	*Total clamping thickness (puk + heatsink web thickness)
Technical Characteristics The bars of the clamps are machined out of cold rolled
steel and plated with ROHS compliant Alodine 5200. The cup shaped springs are
made of steel UNI 50CrV4. Upon request they can be made of stainless steel. The
screws and bolts are made of steel class 8.8.
Insulator Properties The insulators for the clamps are made of polyammide 6.6
with 50% glass fiber added. They have dielectric property of 85KV/mm. The
thickness of the IB8 insulator is 1.7 mm, the IB10 is 2.7mm working temperature
of 145 C.
Clamping Force Conversion; 1 KN=225 LBS, 1 Kg=9.806N, 1 Kg=2.2 LBS.