148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
148 FEATURES
•
Conductive plastic element
•
High rotational life (50 000 cycles)
•
Quiet electrical output
•
Robust construction
RoHS
COMPLIANT
149 FEATURES
•
Cermet element
•
Low temperature coefficient (± 150 ppm/°C)
•
Robust construction
DIMENSIONS
in inches (millimeters)
SINGLE, DUAL OR TRIPLE
0.492
(12.50)
0.031
(0.80)
0.492
(12.50)
0.648
(16.45)
0.185
(4.70)
SOLDER LUG TERMINALS
0.492
(12.500)
0.348
(8.83)
0.250
(6.35)
0.047
(1.200)
0.315
(8.000)
0.375
(9.520)
0.492
(12.500)
0.341
(
8
.
8
5)
0.024
(0.60)
0.024
(0.600)
0.100
(2.54)
0.100
(2.54)
0.300
(7.62)
0.012
(0.030)
0.200
(5.07)
thread 1/4 32-NEF-2A
0.035
(0.900)
0.071
(1.800)
0.183
(4.650)
0.012
(0.300)
0.188
(1.770)
thread 3/8 32-NEF-2A
0.183
(4.650)
FRONT AND REAR SUPPORT PLATES
E = Flush with board surface
0.185
(4.70)
0.492
(12.50)
0.031
(0.80)
Dual
Single
0.024
(0.
8
0)
0.492
(12.50)
0.1
(2.54)
0.2
(5.08)
0.25
0.1 (6.35)
(2.54)
0.3
0.2
(7.62)
(5.08)
0.06
(1.52)
0.151
(3.85)
0.06
(1.52)
0.25
(6.38)
0.151
(1.52)
Tolerances unless otherwise specified ± 0.5
MOUNTING ACCESSORIES: PRODUCT IS SUPPLIED
WITH A NUT & WASHER
OPTIONAL FEATURES
Up to three sections PC support plates
Rotary switches, detents, Solder lugs terminals
CONSTRUCTION MATERIALS
Housing - Molded thermoplastic white
Shaft - Brass, nickel plated
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102
For technical questions, contact: sfer@vishay.com
See also: Application notes
Document Number: 57040
Revision: 31-Jul-06
0.250
(6.3
8
0)
0.024
(0.60)
0.125
(3.17)
0.094
(2.400)
0.193
(4.900)
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
Vishay Spectrol
ELECTRICAL SPECIFICATIONS
PARAMETER
Resistance Range
Resistance Tolerance
Linear
Non-Linear
Taper Tolerance
Linearity (Typical)
End Resistance
0.5 watts at 70 °C
0 watts at 120 °C
148
1 kΩ to 1 MΩ linear
500
Ω
to 500 kΩ non-linear
149
100
Ω
to 2.0 MΩ linear
250
Ω
to 1 MΩ non-linear
Standard ± 10 % to 500K, ± 20 % over 500K
Standard ± 10 % to 100K, ± 20 % over 100K
20 % of the Nominal R at 50 % mechanical rotation
± 5 % Independent
4
Ω
maximum each end
1 watt at 70 °C
0 watt at 150 °C
Power Rating
Non-Linear or PC mount, derate 50 %
Effective Rotation
Contact Resistance Variation
Maximum Continuous Working Voltage
Dielectric Withstanding Voltage
Switch Specifications
270° ± 10° without rotary switch
240° ± 10° with rotary switch
1.5 % of total resistance
3 % of total resistance
350 VAC across end terminals, but within power rating
Sea Level - 750 VAC
70 000 feet - 350 VAC
Rotary (AL) switch: S.P.S.T and S.P.D.T 125 mA, 28 VDC
CCW or CW, rotational life 10 000 cycles (rated load)
MECHANICAL SPECIFICATIONS
Mechanical Rotation
Torque
Operating
Center Detent
Stop Strength
Weight (approx)
Single
Dual
Triple
0.19 oz
0.27 oz
0.35 oz
Single section 0.2 to 3.0 oz - in Dual or triple section 0.3 to 4.5 oz - in
0.6 to 3.0 oz - in
3 in - lbs min
300° ± 5°
ENVIRONMENTAL SPECIFICATIONS
148
Operating Temperature
Storage Temperature
Temperature Cycling (5 Cycles)
Load Life (1000 hrs. Rated Load at 70 °C)
Rotational Load Life
TCR
- 40 °C to + 120 °C
- 55 °C to + 120 °C
- 40 °C to + 120 °C (4 %
ΔRt)
10 %
ΔRt
50 000 cycles
± 1000 ppm/°C
149
- 40 °C to + 150 °C
- 55 °C to + 150 °C
- 40 °C to + 150 °C (3 %
ΔRt)
5 %
ΔRt
25 000 cycles
± 150 ppm/°C
Document Number: 57040
Revision: 31-Jul-06
For technical questions, contact: sfer@vishay.com
See also: Application notes
www.vishay.com
103
148, 149
Vishay Spectrol
MARKING
Unit Identification: Ink stamp on periphery
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
ORDERING INFORMATION
148
MODEL
S
X
NUMBER
MECHANICAL
OF
CONFIGURATION
SECTIONS
G
METRIC
BUSHING
SIZE & SHAFT
56
SHAFT
LENGTH
FROM THE
MOUNTING
SURFACE
148 CP
149 Cer
S:
Single
D:
Duals
T:
Triple
X:
None (single
N:
1/4 Dia x 1/4 L Shaft length code
S:
32:
1/2 in
shaft
Shaft 1/8 Dia
Slotted
J:
1/4 Dia x 3/8 L
40:
5/8 in
F:
D, T sections)
S:
Single w/rotary
48:
3/4 in
Shaft, 1/8 Dia
Flatted
G:
3/8 Dia x 3/8 L
56:
7/8 in
P:
Plain
switch
Shaft, 1/4 Dia
P:
Dual w/rotary
64:
1 in
slotted in
80:
1 1/4 in
switch
std.
on
request
F
and
P
EIA code - first 2
significant digits
3rd is number of
zeros
100
250
500
750
1K
2.5K
5K
S:
Linear
± 10 %
Z:
CW Log,
± 10 %
to 500 kΩ
10K 500K ± 20 % over
500 kΩ
20K 750K
25K 1M
R:
CCW Log,
± 10 %
50K 2M
to 500 kΩ
75K
± 20 %
100K
over 500 kΩ
250K
P:
PC, 0.250
E:
PC terminals
with E support
plate
S:
Solder lugs
e3:
Pure
Sn
S
SHAFT
STYLE
103
RESISTANCE
CODE
Ω
S
TAPER
P
TERMINAL
CONFIGURATION
e3
LEAD
FINISH
SAP PART NUMBERING GUIDELINES
1
4
8
1
0
F
0
G
J
S
X
1
0
1
0
3
K
A
MODEL
NB
SWITCH BUSHING LOCATING
OF MOD.
PEG
SHAFT
LEADS
OHMIC
VALUE/TOL/LAW
OR
SPECIAL
See the end of this data
book
for conversion tables
www.vishay.com
104
For technical questions, contact: sfer@vishay.com
See also: Application notes
Document Number: 57040
Revision: 31-Jul-06
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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