®
TOCOS
RA25Series
P A 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
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Single and tandem units, single shaft; dual unit, dual shaft
Metal shaft and bushing Shaft lock models available
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Panel mounting styles only
Right angle ear-lug terminals
6mm diameter shafts in slot, flat or round end styles
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Standard 15mm or 20mm shaft length
Low operating temperature option of ꢃ10ꢂC orꢃ30ꢂC, up to 100ꢂC
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Specifications
Electrical
Environmental
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Standard Resistance Range . . . . . . . . . . . B = 5Ω to 20kΩ
A,C = 100Ω to 5kΩ
Temperature Range . . . . . . . . . . . . . . Y= ꢃ10ꢂC to 100ꢂC
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or X = ꢃ30ꢂC to 100ꢂC
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Resistance Tolerance . . . . . . . . . . . . . . . . . 10% standard
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Temperature Characteristics . . . . . . . . . . . 85ꢂC, 5 hours
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(
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5%, 2% or 1% special order)
without load
)
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∆T/R
5%
!
End Resistance . . . . . . . . . . . . . . . . . . R 500Ω = 1Ω max.
0
R
500Ω = 0.2% max.
Low Temperature Exposure . . . . . . . ꢃ10ꢂC (Y),ꢃ30ꢂC (X)
1 hour without load
Resistance Taper . . . . B = linear; A = CW audio (logarithm);
)
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∆T/R
3%
C = CCW audio (logarithm); RA25YPR model is linear only.
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Power Rating . . . . . B = 1.2 watts; A,C = 0.6 watt, at 40ꢂC
Load Life . . . . . . . . . . . . 40ꢂC, 1,000 hours with rated load
)
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∆T/R
3%
Insulation Resistance . . . . . . .100MΩ minimum at 500VDC
Dielectric Strength . . . . . . . . . . . . . . . . . . 500VAC, 1 minute
Theoretical Resolution
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Moisture and Load Life . . . . . . . . . . . . 40ꢂC, 90-95%RH,
500 hours with 1/10 rated load
)
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∆T/R
5%
Resistance (Ω) Resolution (%) Resistance (Ω) Resolution (%)
Vibration . . . . . . . . . . . . . . . . . . .10-55Hz, 1.5mm amplitude,
5
10
1.93
1.32
0.85
0.62
0.45
0.38
500
1,000
2,000
5,000
10,000
–
0.29
0.19
0.26
0.19
0.15
–
2 directions, 2 hours each
)
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1%
∆T/R
20
50
100
200
Soldering Heat Resistance . . . . . . . . . 350ꢂC, 3.5 seconds;
)
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∆T/R
2%
Rotational Life . . . . 15,000 cycles (500 cycles for shaft lock
Mechanical
models only) with 1/2 rated load
)
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∆T/R
3%
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Mechanical Travel . . . . . . . . . . . . . . . . . . . . . . . . . . 300ꢂ 5ꢂ
R = Total Resistance Value; ∆T/R = Total Resistance Change
Shaft Torque
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Single Unit . . . . . . 71.4 to 306 gf cm (0.99 to 4.242 oz in)
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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)
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Stop Strength . . . . . . . . . . . .10.2 kgf cm (141.4 oz in) max.
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Mounting Nut Torque . . . . . .15 kgf cm (207.94 oz in) max.
Solderability . . . . . . . . . . . . . . . . . . . . . . . 235ꢂC, 3 seconds
Marking . . . . . . . . . . Taper, resistance, resistance tolerance,
terminal identification, date code
TOCOSAMERICA,INC.
57
1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 E-mail: sales tocos.com www.tocos.com
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