148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57040
102 Revision: 01-Apr-09
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)
0.492
(12.50) 0.64 8
(16.45)
0.1 8 5
(4.70)
0.031
(0. 8 0)
0.024
(0.60)
1 4 3 . 0
) 5
8
.
8
(
4 2 0 . 0
) 0 6 . 0 ( 2 9 4 . 0
) 0 5 . 2 1 (
0.100
(2.54)
0.100
123
123
123
(2.54)
0.300
(7.62)
0.34 8
( 8 . 8 3) 0.250
(6.35)
thread 1/4 32-NEF-2A
0.012
(0.030)
0.200
(5.07)
5 2
1 .
0
) 7 1 .
3
(
SINGLE, DUAL OR TRIPLE
FRONT AND REAR SUPPORT PLATES
E = Flush with board surface
Dual Single
0.25
(6.35)
0.3
(7.62)
0.151
(3. 8 5)
0.06
(1.52) 0.25
(6.3 8 )
0.06
(1.52)
0.151
(1.52)
0.492
(12.50)
0.031
(0. 8 0)
0.1
(2.54)
0.2
(5.0 8 )
0.1 8 5
(4.70)
0.1
(2.54)
0.2
(5.0 8 )
4 2 0 . 0
) 0 8
.
0
(
2 9 4 .
0
) 0 5
. 2 1
(
SOLDER LUG TERMINALS
0.375
(9.520)
0.012
(0.300)
0.1 88
(1.770) thread 3/ 8 32-NEF-2A
0 5 2
.
0
)
0
8
3 .
6
(
3 9 1 . 0
)
0
0 9
.
4
(
0.492
(12.500)
0.047
(1.200) 0.315
( 8 .000)
0.035
(0.900)
0.071
(1. 8 00)
0.1 8 3
(4.650)
0.1 8 3
(4.650)
4 9 0
. 0
) 0 0 4
.
2
(
2 9 4
.
0
) 0 0 5
. 2 1
(
4
2 0
.
0
)
0
0
6 . 0 (
Document Number: 57040 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 01-Apr-09 103
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers Vishay Spectrol
ELECTRICAL SPECIFICATIONS
PARAMETER 148 149
Resistance Range
Linear 1 kΩ to 1 MΩ100 Ω to 2 MΩ
Non-Linear 500 Ω to 500 kΩ250 Ω to 1 MΩ
Tolerance
Linear 10 % 10 %
Non-Linear 20 % on request 10 % 10 %
Linearity (Typical) ± 5 % independent
End Resistance 4 Ω maximum each end
Power Rating
0.5 W at 70 °C
0 W at 120 °C
1 W at 70 °C
0 W at 150 °C
Non-Linear or PC mount, derate 50 %
Circuit Diagram
Effective Rotation 270° ± 10° without rotary switch
240° ± 10° with rotary switch
Contact Resistance Variation 1.5 % of total resistance 3 % of total resistance
Maximum Continuous Working Voltage350 VAC across end terminals, but within power rating
Dielectric Withstanding VoltageSea 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
End Stop Torque
Bushing A and B 2.1 in-lbs max.
Bushing F 6.8 in-lbs max.
Weight (approx.)
Single 0.19 oz.
Dual 0.27 oz.
Triple 0.35 oz.
Terminals
Electrical Elements e3: Pure Sn
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
Temperature Cycling (5 Cycles) - 40 °C to + 120 °C (4 % ΔRT) - 40 °C to + 150 °C (3 % ΔRT)
Load Life (1000 h Rated Load at 70 °C) 10 % ΔRT5 % ΔRT
Rotational Load Life 50 000 cycles
TCR (Typical) ± 500 ppm/°C ± 150 ppm/°C
SealingIP64
a
(1)
b
(2)
c
(3)
cw
148, 149
Vishay Spectrol 1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57040
104 Revision: 01-Apr-09
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. CODE VERSION BUSHING
A, B
BUSHING
F
EFFECTIVE
HIGH PEG
All 148, 149 bushings have a double flat. When panel mounting
holes have been punched accordingly, an anti-rotation lug is not
necessary.
AØ d mm 2 2 0.7
L mm 6.2 6.2 -
BØ d mm 2 2 0.7
L mm 7.75 7.75 -
CØ d mm - 3.5 1.1
L mm - 13.5 -
Locating pegs are supplied in separate bags with nuts and
washers
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 62.5 VA ν
15 VA =
Switching Current Maximum 0.25 A 250 V ν
0.5 A 30 V =
Maximum Current Through Element 2 A
Contact Resistance 30 mΩ
Dielectric
Strength
Terminal to Terminal 1000 VRMS
Terminal to Bushing 2000 VRMS
Maximum Voltage Operation 250 V ν
30 V =
Insulation Resistance Between Contacts 106 MΩ
Life at Pmax. 10 000 actuations
Minimal Travel 25°
Operating Temperature - 40 °C to + 85 °C
ELECTRICAL DIAGRAM
Note
• Common
12
L
3
6
9
Ø d
RSID
CCW POSITION
13*2
Document Number: 57040 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 01-Apr-09 105
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers Vishay Spectrol
SAP ORDERING INFORMATION (Part Number 18 digits)
MODEL NUMBER OF
MODULES SWITCH BUSHING LOCATING
PEG SHAFT SHAFT END LEADS
RESISTANCE
CODE/TOLERANCE/
TAPER OR SPECIAL
148 = Plastic
conductive
149 = Cermet
element
1
2
3
1 = RSID
0 = Without
switch
See table
“Bushing”
0 = Without
A
B
C
See table
“Shaft”
S = Slotted
On request:
R = Round
F = Flatted
See table
“Leads”
Resistance code:
101 = 100
Ω
to
105 = 1 M
Ω
Tolerance code:
M = 20 %; K = 10 %
Taper: A (S); L (Z); F (R)
or
special code given by
Vishay
BUSHING
ΦL OLD CODES
A1/4" 1/4" N
B1/4" 3/8" J
F3/8" 3/8" G
LEADS
TYPE PIN
SPACING
SPACE
BETWEEN
MODULES
OLD
CODES
X10
PCB pins 2.54 mm
(0.100")
N/a
P
X13 7.62 mm
(0.300")
A10 PCB pins and
support plates
2.54 mm
(0.100")
N/a
E
A13 7.62 mm
(0.300")
Y00
Sold, lugs 4.65 mm
(0.183")
N/a
S
Y03 7.62 mm
(0.300")
SHAFT
ΦL OLD CODES
BB 1/8" 1/2" 32
BG 1/8" 5/8" 40
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
PART NUMBER DESCRIPTION (for information only)
148 1 0 F 0 GJ S X10 BO50 10K 10 % A e3
MODEL MODULES SWITCH BUSHING LOCATING
PEG SHAFT SHAFT LEADS PACK. VALUE TOL. TAPER SPECIAL SPECIAL LEAD
FINISH
0F0GJSX 0 0 K81 14 113A
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
Disclaimer
Legal Disclaimer Notice
Vishay
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
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