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MP25A
Power Rheostats
MP25Vishay Angstrohm
FEATURES Diameter 3 5/32" [80.17mm]
Depth behind panel 1 1/2" [38.10mm]
Shaft 1/4" [6.35mm] diameter
Rotation 300° ± 5°
Weight 0.594 pounds (268 grams)
Mounts on panels up to 1/4" [6.35mm] by means of a 3/8" [9.52mm], 32 bushing
and hex nut
Non-turn lugs require 3/16" [4.76mm] hole, 1/2" [12.70mm] below center of shaft -
Model "A" shaft
U. L. Listed, File No. E51076
Power Rheostats100 Watt All other intermediate resistance values are available
and can be manufactured on a normal delivery cycle.
DIMENSIONS in inches [millimeters]Angstrohm rheostat standard
wattage ratings are based on a
300°C rise in “free-air” in ambient not
exceeding + 40°C (shown). For
other applications, wattage ratings
are available based on 340°C rise in
"free-air" in ambient not exceeding
+ 25°C, and in other cases + 50°C.
DERATING
AMBIENT TEMP. DEG. CENTIGRADE
% OF RATED LOAD40 100 150 200 250 300 350
7/8
[22.22]
[2.38]
1 1/2
[38.10]
Dial # 548
2 1/4 [57.15]
Knob # 552
3/4
[19.05]
[51.20]
3 5/32
(3) .162 [4.11] Holes
1 1/2
[38.10]
1/4
