UFT20040CT Datasheet, PDF (4/4 Pages) List of Unclassifed Manufacturers – Ultra-fast Soft Recovery Diode Module

UFT20040CT
MAXIMUM MECHANICAL RATINGS
Terminal Penetration:
Terminal Torque:
Mounting Torque —
Outside Holes:
Mounting Torque —
Center Holes:
Seating Plane
Flatness:
0.235 INCHES max
2.8-4.5N.m max
3.4-4.5N.m max
0.9-1.1N.m max
1 mil per in
(between mounting holes)
Note: while the POWERTAP is capable of sustaining these vertical and levered tensions, the intimate contact
between POWERTAP and heat may be lost .This could lead to thermal runaway. The use of very
flexible leads is recommended for the anode connections. Use of thermal grease is highly recommended.
MOUNTING PROCEDURE
The POWERTAP package requires special mounting considerations because of the long longitudinal axis of the copper heat
sink .It is important to follow the proper tightening sequence to avoid warping the heat sink which can reduce thermal contact
between the POWERTAP and heat sink.
STEP 1:
Locate the POWERTAP on the heat sink
and start mounting bolts into the threads by
hand （2 or 3 turns）
STEP 2:
Finger tighten the center bolt .The bolt may
catch on the threads of the heat sink so it is
important to make sure the face of the bolt or
washer is in contact with the surface of the
POWERPTA
2-3TURNS
↓
2-3TURNS
↓
2-3TURNS
↓
POWER
HEAT
TAP
SINK
2-3TURNS
↓
FINGER-TIGHT
↓
2-3TURNS
↓
POWER
HEAT
TAP
SINK
STEP 3:
Tighten each of the end bolts between 1to 2N.m
1-2N.m
↓
FINGER-TIGHT
↓
POWER
HEAT
TAP
SINK
1-2N.m
↓
STEP 4:
Tighten the center bolt between 0.9to 1.1N.m
1-2N.m
↓
0.9-1.1N.m
↓
POWER
HEAT
TAP
SINK
1-2N.m
↓
STEP 5:
Finally，tighten the end bolts to 4.5N.m
Document Number: UFT20040CT
Oct.23,2008
4.5N.m
↓
0.9-1.1N.m
↓
POWER
HEAT
TAP
SINK
4.5N.m
↓
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