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
(12.500)
0.100
(2.54)
0.100
(2.54)
1 2 3
0.012
(0.030)
0.200
(5.07)
0.300
(7.62)
thread 1/4 32-NEF-2A
0.094
(2.400)
0.125
(3.17)
0.024
(0.60)
0.024
(0.60)
0.035
(0.900)
0.071
(1.800)
0.183
(4.650)
thread 3/8 32-NEF-2A
2
3
0.492
(12.50)
0.031
(0.80)
Dual
Single
0.024
(0.80)
0.492
(12.50)
0.185
(4.70)
0.012
(0.300)
0.188
(1.770)
0.183
(4.650)
1
FRONT AND REAR SUPPORT PLATES
E = Flush with board surface
0.375
(9.520)
0.315
(8.000)
0.193
(4.900)
0.250
(6.35)
0.250
(6.380)
0.047
(1.200)
0.492
(12.500)
0.348
(8.83)
0.341
(8.85)
0.492
(12.50)
0.031
(0.80)
0.648
(16.45)
0.185
(4.70)
0.024
(0.600)
0.492
(12.50)
SOLDER LUG TERMINALS
0.25
0.1 (6.35)
(2.54)
0.3
0.2
(7.62)
(5.08)
0.1
(2.54)
0.2
(5.08)
0.06
(1.52)
0.151
(3.85)
0.06
(1.52)
0.25
(6.38)
0.151
(1.52)
1 2 3
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102
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
Vishay Spectrol
ELECTRICAL SPECIFICATIONS
PARAMETER
Linear
Resistance Range
Non-Linear
Linear
148
149
1 kΩ to 1 MΩ
100 Ω to 2 MΩ
500 Ω to 500 kΩ
250 Ω to 1 MΩ
10 %
10 %
20 % on request 10 %
10 %
Tolerance
Non-Linear
Linearity (Typical)
± 5 % independent
4 Ω maximum each end
End Resistance
0.5 W at 70 °C
0 W at 120 °C
Power Rating
1 W at 70 °C
0 W at 150 °C
Non-Linear or PC mount, derate 50 %
c
a
(3)
(1)
Circuit Diagram
cw
b
(2)
270° ± 10° without rotary switch
240° ± 10° with rotary switch
Effective Rotation
Contact Resistance Variation
1.5 % of total resistance
Maximum Continuous Working Voltage
3 % of total resistance
350 VAC across end terminals, but within power rating
Dielectric Withstanding Voltage
Sea Level - 750 VAC
MECHANICAL SPECIFICATIONS
Mechanical Travel
300° ± 5°
Operating Torque (Typical)
Single section 0.2 to 3.0 oz. - in dual or triple section 0.3 to 4.5 oz.-in
Bushing A and B
2.1 in-lbs max.
Bushing F
6.8 in-lbs max.
End Stop Torque
Single
0.19 oz.
Dual
0.27 oz.
Triple
0.35 oz.
Weight (approx.)
Electrical Elements
e3: Pure Sn
Terminals
Switch Elements
e4: Gold plated
ENVIRONMENTAL SPECIFICATIONS
148
149
Operating Temperature
- 40 °C to + 120 °C
- 40 °C to + 125 °C
Storage Temperature
- 55 °C to + 120 °C
- 55 °C to + 150 °C
- 40 °C to + 120 °C (4 % ΔRT)
- 40 °C to + 150 °C (3 % ΔRT)
10 % ΔRT
5 % ΔRT
Temperature Cycling (5 Cycles)
Load Life (1000 h Rated Load at 70 °C)
Rotational Load Life
TCR (Typical)
Sealing
Document Number: 57040
Revision: 01-Apr-09
50 000 cycles
± 500 ppm/°C
± 150 ppm/°C
IP64
For technical questions, contact: sfer@vishay.com
www.vishay.com
103
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
Vishay Spectrol
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.
CODE
VERSION
A
B
L
12
9
C
BUSHING EFFECTIVE
F
HIGH PEG
Ø d mm
2
2
0.7
L mm
6.2
6.2
0.7
Ø d mm
2
2
L mm
7.75
7.75
-
Ø d mm
-
3.5
1.1
L mm
-
13.5
-
Locating pegs are supplied in separate bags with nuts and
washers
3
6
BUSHING
A, B
Ød
RSID OPTION: ROTARY SWITCH MODULES
• Rotary switches
• Current up to 2 A
• SPDT: Single pole, changeover switch in CCW position - 3 pins
SWITCH SPECIFICATIONS
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.
Switching Power Maximum
62.5 VA ν
15 VA =
Switching Current Maximum
0.25 A 250 V ν
0.5 A 30 V =
Maximum Current Through Element
2A
Contact Resistance
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
Dielectric
Strength
30 mΩ
Terminal to Terminal
1000 VRMS
Terminal to Bushing
2000 VRMS
The switch actuation travel is 25° with a total mechanical travel of
300° ± 5° and electrical travel of electrical module is 238° ± 10°.
Maximum Voltage Operation
250 V ν
30 V =
Insulation Resistance Between Contacts
106 MΩ
RSID SINGLE POLE CHANGEOVER
Life at Pmax.
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.
Minimal Travel
10 000 actuations
25°
Operating Temperature
- 40 °C to + 85 °C
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
Vishay Spectrol
SAP ORDERING INFORMATION (Part Number 18 digits)
1
4
MODEL
8
1
0
F
0
G
NUMBER OF
MODULES
SWITCH
BUSHING
1
2
3
1 = RSID
0 = Without
switch
See table
“Bushing”
148 = Plastic
conductive
149 = Cermet
element
J
S
LOCATING
PEG
0 = Without
A
B
C
BUSHING
L
OLD CODES
A
1/4"
1/4"
N
B
1/4"
3/8"
F
3/8"
3/8"
0
1
0
3
A
RESISTANCE
CODE/TOLERANCE/
TAPER OR SPECIAL
SHAFT
SHAFT END
LEADS
See table
“Shaft”
S = Slotted
See table
“Leads”
On request:
R = Round
F = Flatted
K
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
Φ
L
OLD CODES
BB
1/8"
1/2"
32
J
BG
1/8"
5/8"
40
G
BH
1/8"
3/4"
48
BJ
1/8"
7/8"
56
GB
1/4"
1/2"
32
GG
1/4"
5/8"
40
GH
1/4"
3/4"
48
GJ
1/4"
7/8"
56
GL
1/4"
1"
64
GN
1/4"
1 1/4"
80
LEADS
PIN
SPACING
TYPE
X10
SPACE
BETWEEN
MODULES
2.54 mm
(0.100")
PCB pins
X13
A13
1
SHAFT
Φ
A10
X
PCB pins and
support plates
2.54 mm
(0.100")
Sold, lugs
4.65 mm
(0.183")
Y00
Y03
OLD
CODES
N/a
7.62 mm
(0.300")
P
N/a
7.62 mm
(0.300")
E
N/a
7.62 mm
(0.300")
S
PART NUMBER DESCRIPTION (for information only)
148
1
0
F
MODEL MODULES SWITCH BUSHING
Document Number: 57040
Revision: 01-Apr-09
0
GJ
S
X10
BO50
10K
10 %
A
e3
LOCATING
LEAD
SHAFT SHAFT LEADS PACK. VALUE TOL. TAPER SPECIAL SPECIAL
PEG
FINISH
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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1
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