MBRP30045CT Datasheet, PDF (3/4 Pages) Motorola, Inc – POWERTAP II SWITCHMODE™ Power Rectifiers

MBRP30045CT
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
important 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 between 30 to 40
in-lb.
30 −40 IN-LB
8 −10 IN-LB
30 −40 IN-LB
POWER
HEAT
TAP
SINK
www.onsemi.com
3