Model 657

www.vishay.com

Vishay Spectrol

Revision: 27-Mar-15

2

Document Number: 57077

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

Note

• Nothing stated herein shall be construed as a guarantee of

quality or durability.

DIMENSIONS in inches (millimeters)

0.500

(12.70)

Ø 0.2497

(6.34 - 0.01)

+ 0.0000

- 0.0003

0.030 MAX.

(0.76)

0.031

(0.79)

0.428

(10.87)

± 0.015

0.014

(0.36)

0.625

(15.81)

0.688

(17.46)

0.375

(9.53)

0.143

(3.64)

0.035 x 0.075

(0.89 x 1.91)

MINIMUM WIRE OPENING

0.151

(3.84)

0.093

(2.36)

0.042

Ø 0.375 ± 0.002 x 0.030 MAX. WIDE PILOT

(9.53 x 0.76 MAX. WIDE PILOT)

+ 0.000

- 0.051

0.216

(5.49)

± 0.015

90°

± 5°

SPECTROL

657-X-X-XXX

XXXX MEX

3 2 1

SHAFT FLAT AND PHASING DIAGRAM

WITH SHAFT FLAT POSITIONED AS SHOWN, OUTPUT RATIO

TO BE e/E = 0.50 ± 0.02

DECIMALS: XX ± 0.01 INCHES (± 0.25 mm)

XX ± 0.005 INCHES (± 0.13 mm) ANGLES: ± 2°

A

± 0.031

B

C

CW

SCHEMATIC

2

3

1

MODEL: 657B/657-...

STANDARD RESISTANCE VALUES

CODE

RESISTANCE

(

)

102

1K

202

2K

502

5K

103

10K

203

20K

503

50K

104

100K

MATERIAL SPECIFICATIONS

Shaft

Stainless steel

Bushing

Nickel plated brass

Housing

Thermoplastic

Element

Conductive plastic on alumina

substrate

ENVIRONMENTAL SPECIFICATIONS

Rotational life

2 million revolutions

Vibration

15 g at 10 Hz to 2000 Hz

Operating temperature

-40 °C to +125 °C

Storage temperature

-55 °C to +150 °C

Temperature coefficient

± 600 ppm/°C

Shock

30 g

Resistant to solder heat

350 °C for 5 s

Moisture resistance IP rating

Sealed construction

IP67* application to provide

protection for wiring terminals

MARKING

Unit



identification

Vishay Spectrol, part number, data code,



country of origin and terminal designation.



Example of a marking for a standard part:

657-2-0-102