148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometer
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57040
102 See also Application Notes: www.vishay.com/doc?51001 and www.vishay.com/doc?52029 Revision: 05-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
FEATURES
Robust construction
High rotational life (50 000 cycles)
Up to three sections PC support plates
Rotary switches and solder lugs terminals available
Tests according to CECC 41000 or IEC 60393-1
Compliant to RoHS Directive 2002/95/EC
148 FEATURES
Conductive plastic element
Quiet electrical output
149 FEATURES
Cermet element
Low temperature coefficient (± 150 ppm/°C)
DIMENSIONS in millimeters (inches) ± 0.5 mm (± 0.02")
12.5
(0.492)
12.5
(0.492)
(0.648)
16.45
2.54
2.54
(0.100)
(0.100)
123
123
123
7.62
(0.300)
Thread 1/4 32-NEF-2A
0.30
(0.012)
5.07
(0.200)
Single, dual or triple
Front and rear support plates
E = Flush with board surface
Dual Single
5.08
(0.200)
5.08
(0.200)
12.50
(0.492)
Solder lug terminals
0.8
(0.031)
0.80
(0.031)
4.7
(0.185)
4.70
(0.185)
8.83
(0.348) 6.35
(0.250)
6.35
(0.250) 6.35
(0.250)
3.85
(0.151)
1.52
(0.06)
0.6
(0.024)
0.6
(0.024)
0.60
(0.024)
8.85
(0.341)
3.17
(0.125)
12.5
(0.492)
0.6
(0.024)
12.5
(0.492)
2.54
(0.100) 2.54
(0.100) 7.62
(0.300) 3.85
(0.151)
1.52
(0.06)
1.2
(0.047)
12.5
(0.492)
4.65
(0.183) 4.65
(0.183)
1.800
(0.071)
2.4
(0.094)
4.900
(0.193)
6.35
(0.250)
8.0
(0.315)
0.9
(0.035)
0.300
(0.012)
4.770
(0.188)
9.52
(0.375)
Thread 3/8 32-NEF-2A
Document Number: 57040 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 05-May-11 See also Application Notes: www.vishay.com/doc?51001 and www.vishay.com/doc?52029 103
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometer Vishay Spectrol
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
ELECTRICAL SPECIFICATIONS
PARAMETER 148 149
Resistance Range
Linear 1 k to 1 M100 to 2 M
Non-Linear 500 to 500 k250 to 1 M
Tolerance
Linear 10 % 10 %
Non-Linear 20 % on request 10 % 10 %
Linearity (Typical) ± 5 % independent
End Resistance 4 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 oz. to 3.0 oz. - in dual or triple section 0.3 oz.-inch to 4.5 oz.-inch
End Stop Torque
Bushing A and B 2.1 lb-inch max.
Bushing F 6.8 lb-inch 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 + 125 °C - 40 °C to + 125 °C
Storage Temperature - 55 °C to + 125 °C - 55 °C to + 125 °C
Temperature Cycling (5 Cycles) - 40 °C to + 125 °C (4 % RT) - 40 °C to + 125 °C (3 % RT)
Load Life (1000 h Rated Load at 70 °C) 10 % RT5 % RT
Mechanical Endurance 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
Potentiometer
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57040
104 See also Application Notes: www.vishay.com/doc?51001 and www.vishay.com/doc?52029 Revision: 05-May-11
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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
• Sealing IP60
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 modules 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
15 VA =
Switching Current Maximum 0.25 A 250 V
0.5 A 30 V =
Maximum Current Through Element 2 A
Contact Resistance 100 m
Dielectric
Strength
Terminal to Terminal 1000 VRMS
Terminal to Bushing 2000 VRMS
Maximum Voltage Operation 250 V
30 V =
Insulation Resistance Between Contacts 106 M
Life at Pmax. 10 000 actuations
Minimal Travel 25°
Operating Temperature - 40 °C to + 85 °C
ELECTRICAL DIAGRAM
Note
(1) Common
12
L
3
6
9
Ø d
RSID
CCW POSITION
13 (1)
2
Document Number: 57040 For technical questions, contact: sfer@vishay.com www.vishay.com
Revision: 05-May-11 See also Application Notes: www.vishay.com/doc?51001 and www.vishay.com/doc?52029 105
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometer Vishay Spectrol
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
ORDERING INFORMATION (Part Number)
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
to
105 = 1 M
Tolerance code:
M = 20 %; K = 10 %
Taper: A (S); L (Z); F (R)
or
special code
given by Vishay
BUSHING
Ø L 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
Ø L 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
Legal Disclaimer Notice
www.vishay.com Vishay
Revision: 02-Oct-12 1Document Number: 91000
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
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Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
