MP40
Vishay Angstrohm
Power Rheostats
300 Watt
FEATURES
•
•
•
•
•
•
•
•
Diameter 6" [152.40mm]
Depth behind panel 2 3/16" [55.56mm]
Shaft 3/8" [9.52mm] diameter
Rotation 315°
±
5°
Model "A" shaft
Weight 2.625 pounds (1.191 kilograms)
Total ohms available in higher ranges up to 25,000 ohms
Mounts on panels up to 1 1/4" [31.75mm] by means of a mounting
bracket with two 1/4" [6.35mm], 20 flat head screws
•
U. L. Listed, File No. E51076
RESISTANCE VALUES*
TOTAL
OHMS
MAXIMUM
AMPS
APPROXIMATE
STEPS
DIMENSIONS
in inches [millimeters]
(2)
1/4 [6.35]
20 Taps
6.0
[152.40]
Dia.
2 3/8
[60.32]
2.0
2 3/16
[55.56] [50.80]
1.0
1.5
2.0
2.5
3.0
4.0
5.0
7.5
10.0
15.0
25.0
35.0
50.0
75.0
100.0
150.0
200.0
300.0
400.0
500.0
750.0
1000.0
1500.0
2500.0
17.320
14.142
12.247
10.954
10.000
8.660
7.745
6.324
5.477
4.472
3.464
2.927
2.449
2.000
1.732
1.414
1.224
1.000
0.886
0.774
0.632
0.547
0.447
0.346
40
58
78
78
73
78
78
148
154
147
155
231
267
308
326
270
308
340
370
455
514
578
675
720
1 1/2
[38.10]
Panel
Max.
3/8 [9.52]
1 3/16
[30.16]
3 7/16
[87.31]
(2)
9/32 [7.14]
Diameter
Holes
7/16
[11.11]
Diameter
Hole
1 3/4
[44.45]
11/32
[8.73]
(3) .196 [4.98] Holes
3 1/16
[77.79] R
Knob # 952
Dial # 949
3.0
[76.20]
1 1/32
[26.19]
4.0
[101.60]
DERATING
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.
120
% OF RATED LOAD
100
80
60
40
20
0
40
100
150
200
250
300
350
AMBIENT TEMP. DEG. CENTIGRADE
* All other intermediate resistance values are available and can
be manufactured on a normal delivery cycle.
MARKING
— Resistance value
— Amps
— Date code
ORDERING INFORMATION
MP40
MODEL
A
STANDARD SHAFT CONFIGURATION
Other lengths available on special order
NOTE:
For Additional Features: Submit detailed drawing information when ordering “non-standard” parts.
25
VALUE
www.vishay.com
8
Document Number: 66106
Revision 25-Aug-00
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