Document Number: 66104

Revision 25-Aug-00

www.vishay.com

6

MP25

Vishay 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 Rheostats

100 Watt

— Resistance value

— Amps

— Date code

MARKING

MP25

MODEL

NOTE: For Additional Features: Submit detailed drawing information when ordering “non-standard” parts.

A

BUSHING AND SHAFT CONFIGURATION

25

VALUE

ORDERING INFORMATION

MAXIMUM

AMPS

TOTAL

OHMS

14.140

10.000

7.071

5.774

4.472

3.652

3.162

2.582

2.000

1.414

1.155

1.000

0.707

0.557

0.500

0.447

0.365

0.316

0.224

0.200

0.141

0.115

0.100

0.5

1.0

2.0

3.0

5.0

7.5

10.0

15.0

25.0

50.0

75.0

100.0

200.0

300.0

400.0

500.0

750.0

1000.0

2000.0

2500.0

5000.0

7500.0

10000.0

30

30

56

66

56

66

104

113

144

180

180

216

252

252

252

324

396

410

410

410

685

820

820

APPROXIMATE

STEPS

RESISTANCE VALUES*

11/32 [8.73]

5/8 [15.88]

1/2 [12.70]

5/8

[15.88]

TYPE B: 1/2 [12.70], 11/32 [8.73]

Models. Slotted shaft with standard

bushing for 1/8 [3.18] panel.

TYPE C: 3/4 [19.05], 5/8 [15.88]

Models. Locking bushing with

slotted shaft for 1/4 [6.35] panel.

TYPE E: 27/32 [21.43], 11/32 [8.73]

Models. Std. bushing and flatted shaft

w/screwdriver slot for 1/8 [3.18] panel.

11/32 [8.73]

27/32

[21.43]

3/4

[19.05]

1/2

[12.70]

SPECIAL SHAFTS in inches [millimeters]

* All other intermediate resistance values are available

and can be manufactured on a normal delivery cycle.

TYPE D: 5/8 [15.88], 1/2 [12.70]

Models. Locking bushing with

slotted shaft for 1/8 [3.18] panel.

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

40

100

150

200

250

300

350

120

100

80

60

40

20

0

A = Standard Flatted Shaft

7/8

[22.22]

3/32

[2.38]

1 1/2

[38.10]

Dial # 548

2 1/4 [57.15]

Knob # 552

3/4

[19.05]

2 1/64

[51.20]

3 5/32

[80.17]

Dia.

2 1/16

[52.39] R

(3) .162 [4.11] Holes

1 1/2

[38.10]

3/8 [9.52]

1/16

[1.59]

1/4

[6.35]

7/32

[5.56]

1/2

[12.70]

3/8

[9.52]