Model 208
www.vishay.com
Vishay Spectrol
1
3
/
4
" (44.5 mm) Single Turn Conductive Plastic
Precision Potentiometer
FEATURES
• Rotational life
revolutions
exceeds
20
million
shaft
• Virtually infinite resolution
• Designed for high reliability applications
• Co-molded track and multi-finger wiper provide low noise
signal
• Bushing or servo types available up to 6 sections
QUICK REFERENCE DATA
Sensor type
Output type
Market appliance
Dimensions
ROTATIONAL, conductive plastic
Output by turrets
Professional
1 ¾" (44.5 mm)
• Ohmic value range: 1 k to 50 k
• Material categorization: For definitions of compliance
please see
www.vishay.com/doc?99912
ELECTRICAL SPECIFICATIONS
PARAMETER
Total resistance
tolerance
Linearity (independent)
Electrical angle
Power rating:
Section 1:
Additional sections
Output smoothness
Insulation resistance
Dielectric strength
Taps (extra)
Phasing
Temperature coefficient of resistance
STANDARD
1 k to 50 k
± 10 %
STANDARD
± 0.3 %
350° ± 3°
1.75 W at 70 °C ambient derated to zero at 125 °C
75 % of the rating of section 1
0.1 % maximum
1000 M minimum, 500 V
DC
1000 V
RMS
, 60 Hz
Extra taps available as special
Points at which output ratio is 0.5 aligned ± 1° (ref. to section 1)
± 600 ppm/°C maximum
SPECIAL
-
±5%
SPECIAL
± 0.1 %
ORDERING INFORMATION/DESCRIPTION
The Model 208 can be ordered from this datasheet with a variety of alternate characteristics, as shown above. For most rapid service on
your order, please state:
208
MODEL
B
MOUNTING
B:
Bushing
S:
Servo
1
NUMBER OF SECTIONS
Up to 6
10K
TOTAL RESISTANCE OF EACH SECTION
Beginning with the section nearest
the mounting end
BO1
PACKAGING
Box of 1 piece
Other characteristics will be standard as described on this datasheet. If special characteristics are required, such as: special linearity
tolerance, special resistance tolerance, extra taps, non-linear functions, etc., please state these on your order and allow additional lead time
for delivery.
SAP PART NUMBERING GUIDELINES
208
MODEL
S
STYLE
B:
Bushing
S:
Servo
Revision: 09-Apr-13
2
GANG NUMBERS
From 1 up to 6
103
OHMIC VALUE
GANG N° 1
10K
502
OHMIC VALUE
GANG N° 2
5K
B01
PACKAGING
Document Number: 57053
1
For technical questions, contact:
sferprecisionpot@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Model 208
www.vishay.com
DIMENSIONS
in inches (millimeters)
SERVO MOUNT: 208S/208-2
1
0.340 MIN.
(8.64)
0.093
(2.36)
± 0.015
Vishay Spectrol
0.831
(21.10)
± 0.010
0.625
(15.88)
± 0.031
16° 20°
TYP.
± 5°
0.073 MIN.
(1.85)
45°
3
1
2
1.075 R MAX.
(27.30)
Ø 1.750
(44.45)
Ø 1.750
(44.45)
Ø 1.562
MAX.
(39.67)
0.062
(1.57)
MTG. FACE
1
± 0.010
Ø 1.5620
- 0.0005
(39.67)
+ 0.0000
Ø 0.2497
- 0.0003
(6.34)
+ 0.0000
1.015 R MAX.
(25.78)
0.705
(17.91)
0.239 MIN.
(6.07)
0.062
(1.57)
± 0.031
0.875
(22.22)
± 0.015
0.375
(9.52)
3
/
8
- 32 UNEF - 2A
+ 0.0000
BUSHING MOUNT: 208B/208-1
Ø 0.2497
- 0.0003
(6.34)
± 0.015
Ø 0.4062
(10.32)
+ 0.0000
- 0.0010
Ø 1.000
(25.40)
Ø 1.750
(44.45)
0.010
(0.25)
1
MTG. FACE
2
1
ADD 0.500 ± 0.002 (12.70) FOR EACH
ADDITIONAL SECTION
TOLERANCES: UNLESS OTHERWISE NOTED.
DECIMALS ± 0.005 ANGLES ± 2°
CW
3
SCHEMATIC
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation
Bearing type
Ganging
Torque (maximums)
Servo section 1
Bushing section 1
Each additional section
Mechanical runouts (maximums):
Shaft (TIR/in)
Pilot dia. (TIR)
Lateral (TIR)
Shaft end play
Shaft radial play
Moment of inertia
Weight:
Single section
Each additional section
Revision: 09-Apr-13
360° continuous
SERVO MOUNT
BUSHING MOUNT
Ball bearing
Sleeve bearing
6 sections maximum terminal alignment, added
sections within ± 10° of section 1 terminals
RUNNING
STARTING
0.4 oz. - in (28.80 g - cm)
0.7 oz. - in (50.40 g - cm)
0.7 oz. - in (50.40 g - cm)
1.0 oz. - in (72.0 g - cm)
0.3 oz. - in (21.60 g - cm)
0.4 oz. - in (28.80 g - cm)
BUSHING
SERVO
0.002" (0.05 cm)
0.002" (0.05 cm)
0.002" (0.05 cm)
0.002" (0.05 cm)
0.005" (0.13 cm)
0.003" (0.08 cm)
0.005" (0.13 cm)
0.005" (0.13 cm)
0.003" (0.08 cm)
0.002" (0.05 cm)
2
per section maximum
1.0 g - cm
3.0 oz. (85.05 g)
1.0 oz. (28.35 g)
Document Number: 57053
2
For technical questions, contact:
sferprecisionpot@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Model 208
www.vishay.com
Vishay Spectrol
ENVIRONMENTAL SPECIFICATIONS
Vibration
Shock
Salt Spray
Steel, nickel plated
Brass, nickel plated
Rotational life
15
g
thru 2000 Hz
50
g
96 h
Servo: 20 million shaft revolutions
Bushing: 5 million shaft revolutions
900 h
- 55 °C to + 125 °C
MATERIAL SPECIFICATIONS
Housing and lids
Shaft and clamp rings
Terminals
Bushing mount hardware
Lockwasher internal tooth:
Panel nut:
Aluminium, anodized
Stainless steel, non-magnetic
non-passivated
Brass, plated for solderability
MARKING
Unit
identification
Units shall be marked with Spectrol name,
model number and data code on each
section, resistance, resistance tolerance,
linearity and terminal identification.
Example of a marking for a standard part:
208-12502 103
Load life
Operating temperature
range
RESISTANCE ELEMENT DATA
POWER RATING CHART
(Ratings for cup No. 1.
Additional cups 75 % of values shown)
RATED POWER IN W
3.0
2.5
RESISTANCE
VALUES
()
1K
2K
5K
MAXIMUM VOLTAGE
APPLICABLE
(V)
42
59
94
132
187
299
2.0
10K
1.5
1.0
0.5
0
20
40
60
80
100
120
140 160
20K
50K
AMBIENT TEMPERATURE IN °C
Revision: 09-Apr-13
Document Number: 57053
3
For technical questions, contact:
sferprecisionpot@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
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. 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.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
1
Document Number: 91000
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