148, 149
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Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometer
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
Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
148 FEATURES
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DESIGN SUPPORT TOOLS
Conductive plastic element
Quiet electrical output
Models
Available
149 FEATURES
QUICK REFERENCE DATA
Cermet element
Multiple module Up to 3 modules
Low temperature coefficient ( 150 ppm/C)
Switch module Yes
Detent module n/a
A: linear, L: logarithmic, F: reverse
Special electrical laws
logarithmic
Sealing level IP 64
Lifespan 50K cycles
DIMENSIONS in millimeters (inches) 0.5 mm ( 0.02")
Single, dual or triple
Solder lug terminals
12.5
16.45
(0.492) 12.5
(0.648) FMS
(0.492)
4.7
8.83 9.52
1.2
0.8 (0.185)
(0.375)
(0.348)
(0.047)
(0.031) 8.0
FMS
6.35 (0.315)
(0.250)
0.6
(0.024)
Thread 1/4 32-NEF-2A
2.54
0.300
0.30
0.9
2.54 (0.012)
(0.100)
(0.012)
(0.035)
(0.100)
4.770
7.62 5.07
1.800 (0.188)
Thread 3/8 32-NEF-2A
(0.300) (0.200)
123
(0.071)
4.65 4.65
(0.183) (0.183)
123
Front and rear support plates
E = Flush with board surface
12.5
(0.492)
4.70
(0.185)
0.80
Dual
Single
(0.031)
1.52
6.35
1.52 (0.06)
2.54
(0.250)
2.54 (0.06)
(0.100)
6.35 3.85
(0.100)
(0.250) (0.151)
7.62 3.85
5.08 5.08
(0.300)
(0.151)
(0.200) (0.200)
123
Revision: 12-Apr-18 Document Number: 57040
1
For technical questions, contact: sferpottrimmers@vishay.com
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
0.6
12.50
12.5
(0.024)
(0.492)
0.60
(0.492)
(0.024)
8.85
(0.341)
3.17
(0.125)
12.5
(0.492)
0.6
(0.024)
2.4
(0.094)
4.900
(0.193)
6.35
(0.250)148, 149
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Vishay Spectrol
ELECTRICAL SPECIFICATIONS
PARAMETER 148 149
linear 1 k to 1 M 100 to 2 M
Resistance range
non-linear 500 to 500 k 250 to 1 M
linear 10 % 10 %
Tolerance
non-linear 20 % on request 10 % 10 %
Linearity (typical) 5 % independent
End resistance 4 maximum each end
0.5 W at 70 C 1 W at 70 C
0 W at 120 C 0 W at 150 C
Power rating
Non-linear or PC mount, derate 50 %
c
a
Circuit diagram (3)
(1)
b cw
(2)
270 10 without rotary switch
Effective rotation
240 10 with rotary switch
Contact resistance variation (typical) 1.5 % of total resistance 3 % of total resistance
Maximum continuous working voltage 350 V across end terminals, but within power rating
AC
Dielectric withstanding voltage Sea level -750 V
AC
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
bushing A and B 2.1 lb-inch max.
End stop torque
bushing F 6.8 lb-inch max.
single 0.19 oz.
Weight (approx.) dual 0.27 oz.
triple 0.35 oz.
electrical elements e3: pure Sn
Terminals
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 % R ) -40 C to +125 C (3 % R )
T T
Load life (1000 h rated load at 70 C) 10 % R 5 % R
T T
Mechanical endurance 50 000 cycles
TCR (typical) 500 ppm/C 150 ppm/C
Sealing IP64
Note
Nothing stated herein shall be construed as a guarantee of quality or durability
MARKING
Vishay logo, SAP code of ohmic value, tolerance in %, variation law, manufacturing date (four digits), 3 for the lead 3, product series
(148, 149)
Revision: 12-Apr-18 Document Number: 57040
2
For technical questions, contact: sferpottrimmers@vishay.com
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