RA20 Series
TOCOS
PA N E L C O N T R O L S
®
20mm Diameter, Single-Turn, Wirewound Industrial Panel Controls
RA20Y
RA20YP2
Features
20mm diameter, single-turn industrial panel controls Wirewound element Linear or audio tapers Single or tandem units, single shaft Metal shaft and bushing Panel and PCB mounting styles Shaft lock available 6 mm diameter shafts in slot, flat or round end styles Standard 10mm or 15mm shaft length Lug or right angle mount pin terminals Low operating temperature option of 10 C or 30 C, up to 100 C
Specifications
Electrical
Standard Resistance Range . . . . . . . . . . . B = 10 Ω to 20k Ω A,C= 100 Ω to 3k Ω Resistance Tolerance . . . . . . . . . . . . . . . . . 10% standard ( 5%, 2% or 1% special order ) End Resistance . . . . . . . . . . . . . . . . . . R ! 500 Ω = 1Ω max. R 0 500 Ω = 0.2% max. Resistance Taper . . . . B = linear; A = CW audio (logarithm); C = CCW audio (logarithm) Power Rating . . . . . . . . B = 1 watt; A,C = 0.5 watt, at 40 C Insulation Resistance . . . . . . . 100M Ω minimum at 500VDC Dielectric Strength . . . . . . . . . . . . . . . . . . 500VAC, 1 minute Theoretical Resolution
Resistance ( Ω ) 10 20 50 100 200 500 Resolution ( % ) 0.62 1.12 0.78 0.62 0.46 0.38 Resistance ( Ω ) 1,000 2,000 5,000 10,000 20,000 – Resolution ( % ) 0.44 0.35 0.25 0.18 0.14 –
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; 260 C, 5 seconds (PCB units) ∆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 . . . . . . . . . . . . . . . . . . . . . . . . . . 290 5 Shaft Torque Single Unit . . . . . 30.6 to 204 gf • cm (0.424 to 2.828 oz • in) Tandem Unit . . . . . 71.2 to 510 gf • cm (0.987 to 7.07 oz • in) Stop Strength . . . . . . . . . . . 6.12 kgf • cm (84.84 oz • in) max. Mounting Nut Torque . . . . . . 15 kgf • cm (207.94 oz • in) max. Solderability . . . . . . . . . . . . . . . . . . . . . . . 235 C, 3 seconds Marking . . . . . . . . . . . . . Model type, taper, resistance code, shaft type, 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
53
RA20 Series
RA20Y & RA20X
Panel Mount, Single Unit, Single Shaft Right Angle Ear-Lug Terminals
Dimensions
Unit: mm
Recommended Panel Mounting Hole
RA20YL & RA20XL
Panel Mount, Single Unit, Single Shaft with Shaft Lock Right Angle Ear-Lug Terminals
Recommended Panel Mounting Hole
RA20YP2
PCB Mount, Single Unit, Single Shaft Right Angle Mount Pin Terminals, 3-Pin Inline Pattern, 2-Pin Standoff Rear Support Bracket
Recommended PCB Mounting Holes
54
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
RA20 Series
RA20YG
Panel Mount, Ganged Tandem Unit, Single Shaft Right Angle Ear-Lug Terminals on Each Unit
Dimensions
Unit: mm
Recommended Panel Mounting Hole
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
55
RA20 Series
RA 20 Y L 10 S B 203 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 (i.e., 200 = 20 Ω ; 201 = 200 Ω ; 202 = 2,000 Ω ; 203 = 20,000 Ω ). See table for standard resistance values. For Single Unit: Specify taper and resistance code as shown. For Ganged Tandem 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: B203A503 or if both units are the same: B203X2 Resistance Taper: B = Linear. A = CW Audio (logarithm). C = CCW Audio (logarithm). Shaft End Style: S = Slotted. F = Flatted. R = Round. Standard Shaft Length: 10 = 10mm FMS. 15 = 15mm FMS. Up to 30mm 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. P2 = PCB Mount, Single Unit, Single Shaft, Right Angle Mount Pin Terminals, 3-Pin Inline Pattern, 2-Pin Rear Support Bracket. G = Panel Mount, Ganged Tandem Unit, Single Shaft, Right Angle Ear-Lug Terminals on Each Unit. Operating Temperature Range: Y = X= Size: 20 = 20mm 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 ) 10 20 50 Code 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.
56
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
