MURP20040CT Datasheet, PDF (4/6 Pages) Motorola, Inc – ULTRAFAST RECTIFIER 200 AMPERES

MURP20040CT
MAXIMUM MECHANICAL RATINGS
Terminal Penetration:
Terminal Torque:
Mounting Torque —
Outside Holes:
Mounting Torque —
Center Hole:
Seating Plane
Flatness
0.235 max
70 in-lb max
70 in-lb max
8–10 in-lb max
1 mil per in.
(between mounting holes)
POWERTAP MECHANICAL DATA
APPLIES OVER OPERATING TEMPERATURE
2″
Vertical Pull
250 lbs. max
2 in. Lever Pull
50 lbs. max
Note: While the POWERTAP is capable of sustaining these vertical and levered tensions, the intimate contact
Note: between POWERTAP and heat sink may be lost. This could lead to thermal runaway. The use of very
Note: 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).
2 – 3 TURNS
2 – 3 TURNS
2 – 3 TURNS
POWER
HEAT
TAP
SINK
STEP 2:
Finger tighten the center bolt. The bolt may
catch on the threads of the heat sink so it is im-
portant to make sure the face of the bolt or
washer is in contact with the surface of the
POWERTAP.
STEP 3:
Tighten each of the end bolts between 5 to 10
in-lb.
2 – 3 TURNS
FINGER-TIGHT
2 – 3 TURNS
POWER
HEAT
TAP
SINK
5 – 10 IN-LB
FINGER-TIGHT
5 – 10 IN-LB
POWER
HEAT
TAP
SINK
STEP 4:
Tighten the center bolt between 8 to 10 in-lb.
5 – 10 IN-LB
8 – 10 IN-LB
5 – 10 IN-LB
POWER
HEAT
TAP
SINK
STEP 5:
Finally, tighten the end bolts to 70 in-lb.
70 IN-LB
8 – 10 IN-LB
70 IN-LB
POWER
HEAT
TAP
SINK
4
Motorola Ultrafast Power Rectifier Data