148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
FEATURES
•
Robust construction
•
High rotational life (50 000 cycles)
•
Up to three sections PC support plates
•
Rotary switches and solder lugs terminals available
•
Compliant to RoHS directive 2002/95/EC since date code
0414
148 FEATURES
•
Conductive plastic element
•
Quiet electrical output
149 FEATURES
•
Cermet element
•
Low temperature coefficient (± 150 ppm/°C)
DIMENSIONS
in inches (millimeters) ± 0.02 (± 0.5)
SINGLE, DUAL OR TRIPLE
0.492
(12.50)
0.031
(0.
8
0)
0.492
(12.50)
0.64
8
(16.45)
0.1
8
5
(4.70)
SOLDER LUG TERMINALS
0.492
(12.500)
0.34
8
(
8
.
8
3)
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)
1 2 3
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.
8
00)
0.1
8
3
(4.650)
1
2
3
0.012
(0.300)
0.1
88
(1.770)
thread 3/
8
32-NEF-2A
0.1
8
3
(4.650)
FRONT AND REAR SUPPORT PLATES
E = Flush with board surface
0.1
8
5
(4.70)
0.492
(12.50)
0.031
(0.
8
0)
Dual
Single
0.024
(0.
8
0)
0.492
(12.50)
0.1
(2.54)
0.2
(5.0
8
)
1 2 3
0.1
(2.54)
0.2
(5.0
8
)
0.25
(6.35)
0.3
(7.62)
0.06
(1.52)
0.151
(3.
8
5)
0.06
(1.52)
0.25
(6.3
8
)
0.151
(1.52)
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For technical questions, contact:
sfer@vishay.com
Document Number: 57040
Revision: 01-Apr-09
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
Linear
Resistance Range
Non-Linear
Linear
Tolerance
Non-Linear
Linearity (Typical)
End Resistance
0.5 W at 70 °C
0 W at 120 °C
20 % on request 10 %
± 5 % independent
4
Ω
maximum each end
1 W at 70 °C
0 W at 150 °C
10 %
148
1 kΩ to 1 MΩ
500
Ω
to 500 kΩ
10 %
149
100
Ω
to 2 MΩ
250
Ω
to 1 MΩ
10 %
Power Rating
Non-Linear or PC mount, derate 50 %
a
c
(3)
b
(2)
cw
Circuit Diagram
(1)
Effective Rotation
Contact Resistance Variation
Maximum Continuous Working Voltage
Dielectric Withstanding Voltage
270° ± 10° without rotary switch
240° ± 10° with rotary switch
1.5 % of total resistance
3 % of total resistance
350 V
AC
across end terminals, but within power rating
Sea Level - 750 V
AC
MECHANICAL SPECIFICATIONS
Mechanical Travel
Operating Torque (Typical)
Bushing A and B
End Stop Torque
Bushing F
Single
Weight (approx.)
Dual
Triple
Electrical Elements
Terminals
Switch Elements
e4: Gold plated
300° ± 5°
Single section 0.2 to 3.0 oz. - in dual or triple section 0.3 to 4.5 oz.-in
2.1 in-lbs max.
6.8 in-lbs max.
0.19 oz.
0.27 oz.
0.35 oz.
e3: Pure Sn
ENVIRONMENTAL SPECIFICATIONS
148
Operating Temperature
Storage Temperature
Temperature Cycling (5 Cycles)
Load Life (1000 h Rated Load at 70 °C)
Rotational Load Life
TCR (Typical)
Sealing
± 500 ppm/°C
IP64
- 40 °C to + 120 °C
- 55 °C to + 120 °C
- 40 °C to + 120 °C (4 %
ΔR
T
)
10 %
ΔR
T
50 000 cycles
± 150 ppm/°C
149
- 40 °C to + 125 °C
- 55 °C to + 150 °C
- 40 °C to + 150 °C (3 %
ΔR
T
)
5 %
ΔR
T
Document Number: 57040
Revision: 01-Apr-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
103
148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
LOCATING PEGS
(Anti-Rotation Lug)
The locating peg is provided by a plate mounted on the bushing
and positioned by the module sides. Four set positions are
available, clock face orientation: 12, 3, 6, 9.
All 148, 149 bushings have a double flat. When panel mounting
holes have been punched accordingly, an anti-rotation lug is not
necessary.
L
12
9
3
CODE
A
B
C
VERSION
Ø d mm
L mm
Ø d mm
L mm
Ø d mm
L mm
BUSHING
A, B
2
6.2
2
7.75
-
-
BUSHING EFFECTIVE
F
HIGH PEG
2
6.2
2
7.75
3.5
13.5
0.7
-
0.7
-
1.1
-
Locating pegs are supplied in separate bags with nuts and
washers
Ød
6
RSID OPTION: ROTARY SWITCH MODULES
• Rotary switches
• Current up to 2 A
• SPDT: Single pole, changeover switch in CCW position - 3 pins
MODULES: RS ON/OFF SWITCH
RSI CHANGEOVER SWITCH
The position of each module is free.
RS and RSI rotary switches are housed in a standard 148, 149
module size 12.7 mm x 12.7 mm x 5.08 mm (0.5" x 0.5" x 0.2").
They have the same terminal styles as the assembled electrical
modules.
An assembly can comprise 1 or more switch modules.
Switch actuation is described as seen from the shaft end.
D:means actuation in maximum CCW position
The switch actuation travel is 25° with a total mechanical travel of
300° ± 5° and electrical travel of electrical module is 238° ± 10°.
RSID SINGLE POLE CHANGEOVER
In full CCW position, the contact is made between 3 and 2 and
open between 3 and 1. Switch actuation (CW direction) reverses
these positions.
SWITCH SPECIFICATIONS
Switching Power Maximum
Switching Current Maximum
Maximum Current Through Element
Contact Resistance
Dielectric
Strength
Terminal to Terminal
Terminal to Bushing
62.5 VA
½
15 VA =
0.25 A 250 V
½
0.5 A 30 V =
2A
30 mΩ
1000 V
RMS
2000 V
RMS
250 V
½
30 V =
10
6
MΩ
10 000 actuations
25°
- 40 °C to + 85 °C
Maximum Voltage Operation
Insulation Resistance Between Contacts
Life at P
max.
Minimal Travel
Operating Temperature
ELECTRICAL DIAGRAM
RSID
CCW POSITION
1
2 3*
Note
• Common
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104
For technical questions, contact:
sfer@vishay.com
Document Number: 57040
Revision: 01-Apr-09
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
SAP ORDERING INFORMATION
(Part Number 18 digits)
1
4
8
1
0
F
0
G
J
S
X
1
0
1
0
3
K
A
Vishay Spectrol
MODEL
148 = Plastic
conductive
149 = Cermet
element
NUMBER OF
MODULES
1
2
3
SWITCH
1 = RSID
0 = Without
switch
BUSHING
See table
“Bushing”
LOCATING
PEG
0 = Without
A
B
C
SHAFT
See table
“Shaft”
SHAFT END
S = Slotted
On request:
R = Round
F = Flatted
LEADS
See table
“Leads”
RESISTANCE
CODE/TOLERANCE/
TAPER OR SPECIAL
Resistance code:
101 = 100
Ω
to
105 = 1 MΩ
Tolerance code:
M = 20 %; K = 10 %
Taper: A (S); L (Z); F (R)
or
special code given by
Vishay
BUSHING
Φ
A
B
F
1/4"
1/4"
3/8"
L
1/4"
3/8"
3/8"
OLD CODES
N
J
G
SHAFT
Φ
BB
BG
BH
BJ
1/8"
1/8"
1/8"
1/8"
1/4"
1/4"
1/4"
1/4"
1/4"
1/4"
L
1/2"
5/8"
3/4"
7/8"
1/2"
5/8"
3/4"
7/8"
1"
1 1/4"
OLD CODES
32
40
48
56
32
40
48
56
64
80
LEADS
TYPE
PIN
SPACING
SPACE
BETWEEN
MODULES
N/a
7.62 mm
(0.300")
N/a
7.62 mm
(0.300")
N/a
7.62 mm
(0.300")
S
E
P
OLD
CODES
GB
GG
GH
GJ
X10
PCB pins
X13
A10
A13
Y00
Sold, lugs
Y03
2.54 mm
(0.100")
GL
GN
PCB pins and
support plates
2.54 mm
(0.100")
4.65 mm
(0.183")
PART NUMBER DESCRIPTION
(for information only)
148
1
0
F
0
GJ
S
X10
BO50
10K
10 %
A
e3
MODEL MODULES SWITCH BUSHING
LOCATING
LEAD
SHAFT SHAFT LEADS PACK. VALUE TOL. TAPER SPECIAL SPECIAL
PEG
FINISH
Document Number: 57040
Revision: 01-Apr-09
For technical questions, contact:
sfer@vishay.com
www.vishay.com
105
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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