Not for New Design
Model 139
Vishay Spectrol
1
5
/
16
" (33.3 mm) Industrial Single Turn
Cermet Bushing Mount Model
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
This Model 139 is only for maintenance purposes. It is not
recommended for new designs and will be obsolete in a near
future.
ELECTRICAL SPECIFICATIONS
PARAMETER
Ohmic Value
Tolerance
Linearity (Independent)
Output Smoothness
Power Rating
STANDARD
500
Ω
to 2 MΩ
± 20 %
STANDARD
± 0.5 %
0.1 % maximum
40 °C ambient
5W
derated to zero at 125 °C
345° ± 4°
340° ± 5°
1000 MΩ minimum at 500 V
DC
1000 V
RMS
, 60 Hz
1.0 % of total resistance
0.5 % maximum
± 100 ppm/°C maximum
SPECIAL
500
Ω
to 2 MΩ
±5%
BEST PRACTICAL
± 0.25 %
Electrical Rotation
Continuous
Stops
Insulation Resistance
Dielectric Strength
Absolute Minimum Resistance
Minimum Voltage
Temperature Coefficient of Resistance
MATERIAL SPECIFICATIONS
Housing
Rear Lid
Shaft
Terminals
Mount Hardware
Lockwasher Internal Tooth:
Panel Nut:
Molded glass filled thermoplastic
Glass filled thermoset plastic
Stainless steel, non-magnetic
Brass, plated for solderability,
Non-passivated
Steel, nickel plated
Brass, nickel plated
ENVIRONMENTAL SPECIFICATIONS
Vibration
Shock
Salt Spray
Rotational Life
Shaft Revolutions
Operating Temperature Range
15 Gs thru 2000 Hz
50 g
48 h
2 million
- 55 °C to + 125 °C
ORDERING INFORMATION/DESCRIPTION
139
MODEL
B
BUSHING
MOUNT
0
MECHANICAL
OPTIONS
0.
Continuous
2.
Stops
0
OTHER OPTIONAL
FEATURES
0.
Standard (end taps)
1.
Center tap (within
5° of electrical center)
20K
RESISTANCE CODE
BO10
PACKAGING
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
MODEL
B
STYLE
2
MECHANICAL
OPTIONS
With stops
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14
1
FEATURES
With center tap
103
OHMIC VALUE
B10
PACKAGING
Box of 10 pieces
Document Number: 57038
Revision: 28-May-07
For technical questions, contact: sfer@vishay.com
Not for New Design
1
5
/
16
" (33.3 mm) Industrial Single Turn
Cermet Bushing Mount Model
DIMENSIONS
in inches (millimeters)
± 0.031
Model 139
Vishay Spectrol
0.875
(22.22)
± 0.015
0.625
(15.88)
± 0.015
± 0.015
+ 0.0000
60°
± 0.015
Ø 0.500
(12.70)
BC
0.187
(4.75)
0.062
(1.57)
0.375
(9.52)
Ø 0.4062 MTG.
- 0.0020
(10.32)
0.032
(0.81)
± 0.010
+ 0.0000
Ø 0.2497 (6.34)
- 0.0003
0.030 MAX. (0.76)
0.562 (14.27)
± 0.015
Ø 1.312
(33.32)
0.032 (0.81)
3
/
8
- 32 UNEF - 2A
Ø 0.125 (3.18)
0.062 (1.57)
2
1
CW
3
TOLERANCES: UNLESS OTHERWISE NOTED.
DECIMALS ± 0.005 ANGLES ± 2°
MTG. SURFACE
SCHEMATIC
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation
Bearing Type
Torque (Maximums)
Runouts (Maximums)
Shaft Runout (TIR)
Pilot Dia. Runout (TIR)
Lateral Runout (TIR)
Shaft End Play
Shaft Radial Play
Weight
Stop Strength
0.002" (0.05 mm)
0.003" (0.08 mm)
0.005" (0.13 mm)
0.008" (0.20 mm)
0.003" (0.08 mm)
1.0 oz. maximum (28.35 g)
8.0 in - lbs (9.21 kg - cm) (stops version only)
STARTING
1.0 oz. - in (72 g - cm)
360° (continuous) 340° ± 5° stops
Sleeve
RUNNING
0.7 oz. - in (50.40 g - cm)
POWER RATING CHART
6.0
MARKING
Units shall be marked with Vishay Spectrol
name, model number, resistance and
tolerance, linearity, terminal identification, and
data code Applicable test procedures:
MIL-R-39023
RATED POWER IN W
5.0
4.0
3.0
2.0
1.0
0
20
40
60
80
100
120
140
Unit
Identification
AMBIENT TEMPERATURE IN °C
Document Number: 57038
Revision: 28-May-07
For technical questions, contact: sfer@vishay.com
www.vishay.com
15
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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1
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