Tel:
82-32-817-4325
Fax:
82-32-817-4329
Resistors And
Resistive Applications
PR24
SINGLE-TURN ROTARY
POTENTIOMETERS
Description
The PR 24 series are single-turn, housed in a metal case, rotary carbon control potentiometers. They comprise a
carbon resistive track fitted on a resin modified paper base. Base diameter of potentiometers is 24 mm. Resistance
track can be linear-A, logarithmic-B, inverse logarithmic-C. Potentiometers are made single or tandem, with plastic
or metallic spindle. Terminals are designed for PCB or soldering pins.
Applications
Potentiometers are widely used in electronic audio video equipment, electric domestic equipment and outer control
elements in professional use too.
Quick Reference Data
Parameter
Nominal resistance R
N
Resistance range: A low (linear) (ohms)
B low (logarithmic) (ohms)
C low (reverse logarithmic) (ohms)
Tolerance of resistance
(%)
Max. dissipation PN at Tamb= 40oC: A low
B low
C low
Maximum working voltage:
A law
B law
C law
Insulating voltage
(VDC)
Total mechanical angle of rotation
()
o
Value
According series E3 (1 - 2, 2 - 4, 7 - 10 etc.)
100 ÷ 2,2M
1k ÷ 1M
1k ÷ 1M
±5% on RN less or = 470kohms on request
±10% on RN more than = 470kohms on request
±20% on RN less or = 470kohms on request
±30% on RN more than 470kohms on request
0.5
0.25
0.25
250
250
250
350 /2100 (pulse value)
300±10
25% P
N
25/070/10
250V/3A AC
(W)
(W)
(W)
(V)
(V)
(V)
Maximum dissipation at category temperature
Climatic category
Switch data: voltage/current
Marking
Marking on metal case: producer "TELPOD"; rated resistance; month and year of production.
Ordering example:
Please order according example:
1. We need potentiometers 24 mm diameter; without switch; resistance 47kohms; linear A law; diameter of spindle
6 mm, long of spindle 40 mm; type of spindle end P-6.
Potentiometer PR 246 47kohms A 40 P6
2. We need potentiometers 24 mm diameter; with switch; resistance 22kohms; logarithmic C; plastic spindle,
diameter of spindle 6 mm, long of spindle 25 mm; type of spindle end P-5
Potentiometer PR 2462 s55 22kohms C 25 P5
Packing
The potentiometers can be supplied in bulk packing in a plastic bags and in a carton box.
Web:
http://www.raraohm.com
Email:
sg@raraohm.com
Date:
2012-12-12
Copyright©RARA Electronics Corp.
Tel:
82-32-817-4325
Fax:
82-32-817-4329
Resistors And
Resistive Applications
Resistance Laws:
Fig. 1. Resistance laws: A - linear; B-logarithmic, C-reverse logarithmic.
Fig. 2. Derating curve versus ambient temperature.
Fig. 2. Power dissipation curve of potentiometers versus ambient temperature.
Derating curve:
Potentiometers could be dissipated of power from 100% nominal power
at ambient temperature
≤
+40oC up to 25% nominal power at ambient temperature +70oC.
Summary
Type of
potentiometer
PR 246
PR 2461 s55
PR 2462
PR 2462 s55
Switch
No
Yes
No
Yes
Spindle
material
Metal
Metal
Plastic
Plastic
Diameter of
Spindle
(mm)
6
6
6
6
Standard spindle long
(mm)
16; 20; 25; 32; (40)
16; 20; 25; 32; (40)
(20); 25; (32)
(20); 25; (32)
Type of spindle
end
P-1; P-5; P-6
P-1; P-5; P-6
(P-1); P-5
(P-1); P-5
Web:
http://www.raraohm.com
Email:
sg@raraohm.com
Date:
2012-12-12
Copyright©RARA Electronics Corp.
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