Cermet Bushing Mount Model

Model 139

Vishay Spectrol

www.vishay.com

For technical questions, contact: sfer@vishay.com

Document Number: 57038

14

Revision: 28-May-07

Not for New Design

This Model 139 is only for maintenance purposes. It is not

recommended for new designs and will be obsolete in a near

future.

FEATURES

• Very high ohmic values available: up to 2 MΩ

• Center tap available

• Continuous rotation and mechanical stops

both standard

• High power rating

RoHS

COMPLIANT

ELECTRICAL SPECIFICATIONS

PARAMETER

STANDARD

SPECIAL

Ohmic Value

500

Ω to 2 MΩ

500

Ω to 2 MΩ

Tolerance

± 20 %

± 5 %

Linearity (Independent)

STANDARD

BEST PRACTICAL

± 0.5 %

± 0.25 %

Output Smoothness

0.1 % maximum

Power Rating

40 °C ambient

5 W

derated to zero at 125 °C

Electrical Rotation

Continuous

345° ± 4°

Stops

340° ± 5°

Insulation Resistance

1000 M

Ω minimum at 500 V

DC

Dielectric Strength

Absolute Minimum Resistance

1.0 % of total resistance

Minimum Voltage

0.5 % maximum

Temperature Coefficient of Resistance

± 100 ppm/°C maximum

MATERIAL SPECIFICATIONS

Housing

Molded glass filled thermoplastic

Rear Lid

Glass filled thermoset plastic

Shaft

Stainless steel, non-magnetic

Terminals

Brass, plated for solderability,

Non-passivated

Mount Hardware

Lockwasher Internal Tooth:

Panel Nut:

Steel, nickel plated

Brass, nickel plated

ENVIRONMENTAL SPECIFICATIONS

Vibration

15 Gs thru 2000 Hz

Shock

50 g

Salt Spray

48 h

Rotational Life

2 million

Shaft Revolutions

Operating Temperature Range

- 55 °C to + 125 °C

ORDERING INFORMATION/DESCRIPTION

139

B

0

0

20K

BO10

MODEL

BUSHING

MOUNT

MECHANICAL

OPTIONS

OTHER OPTIONAL

FEATURES

RESISTANCE CODE

PACKAGING

0. Continuous

2. Stops

0. Standard (end taps)

1. Center tap (within

5° of electrical center)

Box of 10 pieces

Other characteristics will be standard as described on this specification sheet. If special characteristics are required such as special linearity

tolerance, special resistance tolerance, non-linear functions, etc., please state these on your order.

SAP PART NUMBERING GUIDELINES

139

B

2

1

103

B10

MODEL

STYLE

MECHANICAL

OPTIONS

FEATURES

OHMIC VALUE

PACKAGING

With stops

With center tap

Box of 10 pieces