RA25
Series
TOCOS
PA N E L C O N T R O L S
®
25mm Diameter, Single-Turn, Wirewound Industrial Panel Controls
RA25Y
RA25YG
RA25YPR
Features
25mm diameter, single-turn industrial panel controls
Wirewound element
Linear or audio tapers
Single and tandem units, single shaft; dual unit, dual shaft
Metal shaft and bushing
Shaft lock models available
Panel mounting styles only
Right angle ear-lug terminals
6mm diameter shafts in slot, flat or round end styles
Standard 15mm or 20mm shaft length
Low operating temperature option of 10 C or 30 C, up to 100 C
Specifications
Electrical
Standard Resistance Range
. . . . . . . . . . . B = 5Ω to 20kΩ
A,C = 100Ω to 5kΩ
Resistance Tolerance
. . . . . . . . . . . . . . . . . 10% standard
( 5%, 2% or 1% special order )
End Resistance
. . . . . . . . . . . . . . . . . . R
!
500Ω = 1Ω max.
R
0
500Ω = 0.2% max.
Resistance Taper
. . . . B = linear; A = CW audio (logarithm);
C = CCW audio (logarithm); RA25YPR model is linear only.
Power Rating
. . . . . B = 1.2 watts; A,C = 0.6 watt, at 40 C
Insulation Resistance
. . . . . . . 100MΩ minimum at 500VDC
Dielectric Strength
. . . . . . . . . . . . . . . . . . 500VAC, 1 minute
Theoretical Resolution
Resistance (
Ω
)
5
10
20
50
100
200
Resolution ( % )
1.93
1.32
0.85
0.62
0.45
0.38
Resistance (
Ω
)
500
1,000
2,000
5,000
10,000
–
Resolution ( % )
0.29
0.19
0.26
0.19
0.15
–
Environmental
Temperature Range
. . . . . . . . . . . . . . Y =
or X =
10 C to
30 C to
100 C
100 C
Temperature Characteristics
. . . . . . . . . . .
85 C, 5 hours
without load
∆T/R
)
5%
Low Temperature Exposure
. . . . . . .
10 C ( Y ), 30 C ( X )
1 hour without load
∆T/R
)
3%
Load Life
. . . . . . . . . . . .
40 C, 1,000 hours with rated load
∆T/R
)
3%
Moisture and Load Life
. . . . . . . . . . . . 40 C, 90-95%RH,
500 hours with 1/10 rated load
∆T/R
)
5%
Vibration
. . . . . . . . . . . . . . . . . . .10-55Hz, 1.5mm amplitude,
2 directions, 2 hours each
∆T/R
)
1%
Soldering Heat Resistance
. . . . . . . . . 350 C, 3.5 seconds;
∆T/R
)
2%
Rotational Life
. . . . 15,000 cycles (500 cycles for shaft lock
models only) with 1/2 rated load
∆T/R
)
3%
R = Total Resistance Value;
∆T/R
= Total Resistance Change
Mechanical
Mechanical Travel
. . . . . . . . . . . . . . . . . . . . . . . . . . 300 5
Shaft Torque
Single Unit . . . . . . 71.4 to 306 gf
•
cm (0.99 to 4.242 oz
•
in)
Tandem Unit . . . 71.4 to 714 gf
•
cm (0.987 to 9.899 oz
•
in)
Dual Unit . . . . . . 71.4 to 459 gf
•
cm (0.987 to 6.363 oz
•
in)
Stop Strength
. . . . . . . . . . . . 10.2 kgf
•
cm (141.4 oz
•
in) max.
Mounting Nut Torque
. . . . . . 15 kgf
•
cm (207.94 oz
•
in) max.
Solderability
. . . . . . . . . . . . . . . . . . . . . . . 235 C, 3 seconds
Marking
. . . . . . . . . . Taper, resistance, resistance tolerance,
terminal identification, date code
TOCOS
AMERICA, INC.
1177 East Tower Road, Schaumburg, IL 60173
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
57
RA25 Series
RA25Y & RA25X
Panel Mount, Single Unit, Single Shaft
Right Angle Ear-Lug Terminals
Dimensions
Unit: mm
Recommended
Panel Mounting Holes
RA25YL & RA25XL
Panel Mount, Single Unit, Single Shaft with Shaft Lock
Right Angle Ear-Lug Terminals
Recommended
Panel Mounting Holes
RA25YPR
Panel Mount, Single Unit, Single Knurled Shaft with Push-Lock
Right Angle Ear-Lug Terminals
Recommended
Panel Mounting Holes
58
1177 East Tower Road, Schaumburg, IL 60173
TOCOS
AMERICA, INC.
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
RA25 Series
RA25YG
Panel Mount, Ganged Tandem Unit, Single Shaft
Right Angle Ear-Lug Terminals on Each Unit
Dimensions
Unit: mm
Recommended
Panel Mounting Holes
RA25YGL
Panel Mount, Ganged Tandem Unit, Single Shaft with Shaft Lock
Right Angle Ear-Lug Terminals on Each Unit
Recommended
Panel Mounting Holes
RA25YD
Panel Mount, Dual Unit, Dual Concentric Shaft
Right Angle Ear-Lug Terminals on Each Unit
Recommended
Panel Mounting Holes
TOCOS
AMERICA, INC.
1177 East Tower Road, Schaumburg, IL 60173
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
59
RA25 Series
RA 25 Y L 20 S
B 103 K
Part Numbering System
NOTE: FMS = From Mounting Surface
Resistance Tolerance: K
J
G
F
=
=
=
=
10% (standard).
5% (special order ).
2% (special order ).
1% (special order ).
Resistance Code:
Expressed in ohms. A three digit code where the first
two digits are significant figures, and the third digit indicates the number
of zeros that follow these figures. R indicates decimal point for resistance
less than 10Ω (i.e., 5R0 = 5Ω; 100 = 10Ω; 101 = 100Ω; 102 = 1,000Ω;
103 = 10,000Ω ).
See table for standard resistance values.
For Single Unit:
Specify taper and resistance code as shown.
For Ganged Tandem Unit or Dual Unit:
Specify a taper code and resistance code for each unit starting with
the front unit followed by the rear unit. If both units have the same taper
and resistance codes, add “X2” suffix per example below.
Examples:
B103A503
or if both units are the same:
B103X2
Resistance Taper: B
= Linear.
A
= CW Audio (logarithm).
C
= CCW Audio (logarithm).
Shaft End Style: S
= Slotted.
F
= Flatted.
R
= Round (RA25YPR model has knurled end style.)
For Single Shaft:
Specify the shaft length (FMS) and shaft end style as shown.
For Dual Concentric Shaft:
Specify the shaft length (FMS) and shaft end style for the inner shaft
followed by the shaft length (FMS) and shaft end style for the outer
shaft. Use a dash (-) to separate the code groups for the inner and
outer shaft specifications. Example:
30R-20R
Standard Shaft Length: 15
= 15 mm FMS.
20
= 20mm FMS.
Up to 50mm shaft length available (special order ).
Style: Blank
= Panel Mount, Single Unit, Single Shaft, Right Angle
Ear-Lug Terminals.
L
= Panel Mount, Single Unit, Single Shaft with Shaft Lock,
Right Angle Ear-Lug Terminals.
PR
= Panel Mount, Single Unit, Single Knurled Shaft with Shaft
Lock, Right Angle Ear-Lug Terminals.
G
= Panel Mount, Ganged Tandem Unit, Single Shaft,
Right Angle Ear-Lug Terminals on Each Unit.
GL
= Panel Mount, Ganged Tandem Unit, Single Shaft with Shaft
Lock, Right Angle Ear-Lug Terminals on Each Unit.
D
= Panel Mount, Dual Unit, Dual Concentric Shaft, Right Angle
Ear-Lug Terminals on Each Unit.
Operating Temperature Range: Y
=
X
=
Size: 25
= 25mm Diameter.
TOCOS Series Name: RA
= Wirewound Element.
10 C to 100 C.
30 C to 100 C.
Standard Resistance Values and Part Numbering Codes
Standard Nominal Total Resistance Values and Part Numbering Codes
Resistance (
Ω
)
05
10
20
50
Code
5R0
100
200
500
Resistance (
Ω
)
100
200
500
Code
101
201
501
Resistance (
Ω
)
1,000
2,000
5,000
Code
102
202
502
Resistance (
Ω
)
10,000
20,000
Code
103
203
Refer to Shaft End Styles Specifications and Hardware Specifications for details and availability.
For additional information, refer to Guidelines and Precautions for Using Panel Controls.
60
1177 East Tower Road, Schaumburg, IL 60173
TOCOS
AMERICA, INC.
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
Analog electronics
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