Model 138
Vishay Spectrol
1
5
/
16
" (33.3 mm) Industrial Single Turn,
Bushing Mount, Conductive Plastic
FEATURES
•
Center tap available
•
Continuous rotation and mechanical stops
both standard
•
Suitable model for all types of industrial
applications
•
Compliant to RoHS directive 2002/95/EC
ELECTRICAL SPECIFICATIONS
PARAMETER
Ohmic Value Range
Tolerance
Linearity (Independent)
Output Smoothness
Power Rating
MIL-PRF-39023 TEST PROCEDURES APPLY
STANDARD
SPECIAL
1 kΩ to 50 kΩ
1 kΩ to 50 kΩ
± 10 %
±5%
STANDARD
BEST PRACTICAL
± 0.5 %
± 0.25 %
0.1 % maximum
40 °C ambient
2W
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
± 600 ppm/°C maximum
Electrical Angle
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
138
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
138
MODEL
B
STYLE
2
MECHANICAL
OPTIONS
With stops
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12
1
FEATURES
With center tap
103
OHMIC VALUE
B10
PACKAGING
Box of 10 pieces
Document Number: 57033
Revision: 17-May-10
For technical questions, contact:
sfer@vishay.com
Model 138
1
5
/
16
" (33.3 mm) Industrial Single Turn,
Bushing Mount, Conductive Plastic
DIMENSIONS
in inches (millimeters)
± 0.015
Vishay Spectrol
0.875
(22.22)
± 0.031
+ 0.0000
- 0.0020
0.625
(15.88)
60°
± 0.015
Ø 0.500
(12.70)
BC
0.187
(4.75)
± 0.015
0.375
(9.52)
0.062
(1.57)
± 0.015
Ø 0.4062 MTG. (10.32)
0.032
(0.81)
± 0.010
+ 0.0000
- 0.0003
Ø 0.2497 (6.34)
0.030 MAX. (0.76)
± 0.015
0.562 (14.27)
Ø 1.312
(33.32)
0.032
(0.81)
3
/
8
- 32 UNEF - 2A
Ø 0.125 (3.18)
0.062 (1.57)
MTG. SURFACE
2
1
CW
3
TOLERANCES: UNLESS OTHERWISE NOTED.
DECIMALS ± 0.005 ANGLES ± 2°
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: 57033
Revision: 17-May-10
For technical questions, contact:
sfer@vishay.com
www.vishay.com
13
Legal Disclaimer Notice
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Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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 in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
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. Product names and markings noted herein may be trademarks of their respective owners.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Revision: 12-Mar-12
1
Document Number: 91000
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