Model 208
Vishay Spectrol
1
3
/
4
" (44.5 mm) Single Turn Conductive Plastic
Precision Potentiometer
FEATURES
•
Rotational life exceeds 20 million shaft
revolutions
RoHS
•
Virtually infinite resolution
COMPLIANT
•
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
•
Ohmic value range: 1 kΩ to 50 kΩ
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
± 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 MΩ 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)
± 400 ppm/°C maximum
SPECIAL
-
±5%
SPECIAL
± 0.1 %
1 k
Ω
to 50 kΩ
ORDERING INFORMATION/DESCRIPTION
The Model 208 can be ordered from this data sheet 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 data sheet. 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
2
GANG NUMBERS
From 1 up to 6
103
OHMIC VALUE
GANG N
O
1
10K
502
OHMIC VALUE
GANG N
O
2
5K
B01
PACKAGING
Document Number: 57053
Revision: 04-Mar-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
35
Model 208
Vishay Spectrol
1
3
/
4
" (44.5 mm) Single Turn Conductive Plastic
Precision Potentiometer
DIMENSIONS
in inches (millimeters)
SERVO MOUNT: 208 S
1
0.340 MIN.
(8.64)
0.093
(2.36)
± 0.015
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: 208 B
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
www.vishay.com
36
SERVO MOUNT
Ball bearing
360° continuous
BUSHING MOUNT
Sleeve bearing
6 sections maximum terminal alignment, added
sections within ± 10° of section 1 terminals
STARTING
0.7 oz. - in (50.40 g - cm)
1.0 oz. - in (72.0 g - cm)
0.4 oz. - in (28.80 g - cm)
SERVO
0.002" (0.05 cm)
0.002" (0.05 cm)
0.003" (0.08 cm)
0.005" (0.13 cm)
0.002" (0.05 cm)
1.0 g - cm
2
per section maximum
3.0 oz. (85.05 g)
1.0 oz. (28.35 g)
For technical questions, contact: sfer@vishay.com
Document Number: 57053
Revision: 04-Mar-08
RUNNING
0.4 oz. - in (28.80 g - cm)
0.7 oz. - in (50.40 g - cm)
0.3 oz. - in (21.60 g - cm)
BUSHING
0.002" (0.05 cm)
0.002" (0.05 cm)
0.005" (0.13 cm)
0.005" (0.13 cm)
0.003" (0.08 cm)
Model 208
1
3
/
4
" (44.5 mm) Single Turn Conductive Plastic
Precision Potentiometer
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
Salt Spray
Steel, nickel plated
Brass, nickel plated
Rotational Life
Load Life
Operating Temperature
Range
96 h
Servo: 20 million shaft revolutions
Bushing: 5 million shaft revolutions
900 h
- 55 °C to + 125 °C
Vishay Spectrol
ENVIRONMENTAL SPECIFICATIONS
Vibration
Shock
15 g thru 2000 Hz
50 g
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
POWER RATING CHART
(Ratings for cup No.1.
Additional cups 75 % of values shown)
RESISTANCE ELEMENT DATA
RESISTANCE
VALUES
(Ω)
1K
2K
5K
10K
20K
50K
MAXIMUM VOLTAGE
APPLICABLE
(V)
42
59
94
132
187
299
RATED POWER IN W
3.0
2.5
2.0
1.5
1.0
0.5
0
20
40
60
80
100
120
140 160
AMBIENT TEMPERATURE IN °C
Document Number: 57053
Revision: 04-Mar-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
37
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
www.vishay.com
1
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