TOCOS ® GF281 Series PA N E L C O N T R O L S 28mm Diameter, Single-Turn, Cermet Industrial Panel Controls GF281G GF281 Features 28mm diameter, single-turn industrial panel controls Cermet film element Single and tandem units, single shaft Excellent environmental characteristics Linear taper Shaft lock available Metal shaft and bushing 6mm diameter shafts in slot, flat or round end styles Standard 15mm or 20mm shaft length Panel mount only Right angle ear-lug terminals Optional 6-turn GFV281 model available as special order Specifications Electrical Environmental Standard Resistance Range . . . . . . . . . . . . . 100Ω to 1MΩ Temperature Range . . . . . . . . . . . . . . . . . 10C to 120C Resistance Tolerance . . . . . . . . . . . . . . . . . 10% standard Low Temperature Operation . . . . . . . . .10C, 45 minutes with rated load ∆T/R )3% End Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Ω max. Resistance Taper . . . . . . . . . . . . . . . . . . . . . . . . . . B = linear Peak Noise (C.R.V.) . . . . . . . 3% or 5Ω, whichever is greater Power Rating . . . . . . . . 2 watts at 70C, 0 watt at 120C Load Life . . . . . . . . . . . . 70C, 1,000 hours with rated load ∆T/R )5% Maximum Input Voltage . . . . . . . . 400VDC or power rating, whichever is smaller Vibration . . . . . . . . . . . . . . . . . . .10-55Hz, 1.5mm amplitude, 3 directions, 2 hours each ∆T/R )1% Temperature Coefficient . . . 100 ppm /C, 200Ω to 500kΩ 250 ppm /C, other values Soldering Heat Resistance . . . . . . . . . . . 350C, 3 seconds ∆T/R )2% Dielectric Strength . . . . . . . . . . . . . . . . 1,000VAC, 1 minute Rotational Life . . . . 15,000 cycles (500 cycles for shaft lock models only) without load ∆T/R )10% Mechanical Mechanical Travel . . . . . . . . . . . . . . . . . . . . . . . . . 29510 ∆T/R = Total Resistance Change Shaft Torque Single Unit . . . . . . 50 to 300 gf • cm (0.693 to 4.159 oz • in) Tandem Unit . . . . . 50 to 450 gf • cm (0.693 to 6.238 oz • in) Stop Strength . . . . . . . . . . . 9.2 kgf • cm (127.54 oz • in) max. Mounting Nut Torque . . . . . . 15 kgf • cm (207.94 oz • in) max. Solderability . . . . . . . . . . . . . . . . . . . . . . . 235C, 5 seconds Marking . . . . . . . . . . . . . . . . . . Model type, taper, resistance, shaft type, terminal identification, date code TOCOS AMERICA, INC. 1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 81 E-mail: [email protected] www.tocos.com GF281 Series Dimensions GF281 Single-Turn & GFV281 6-Turn (special order) Unit: mm Panel Mount, Single Unit, Single Shaft Right Angle Ear-Lug Terminals Recommended Panel Mounting Holes GF281L Panel Mount, Single Unit, Single Shaft with Shaft Lock Right Angle Ear-Lug Terminals Recommended Panel Mounting Holes GF281G Panel Mount, Ganged Tandem Unit, Single Shaft Right Angle Ear-Lug Terminals on Each Unit Recommended Panel Mounting Holes TOCOS AMERICA, INC. 82 1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 E-mail: [email protected] www.tocos.com GF281 Series Part Numbering System GF 281 G L 15 S B 103 K NOTE: FMS = From Mounting Surface Resistance Tolerance: K = 10% (standard). 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., 100 = 10Ω; 101 = 100Ω; 102 = 1,000Ω; 103 = 10,000Ω; 105 = 1,000,000Ω ). 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: B103A503 or if both units are the same: B103X2 Resistance Taper: B = Linear. Shaft End Style: S = Slotted. F = Flatted. R = Round. Standard Shaft Length: 15 = 15 mm FMS. 20 = 20mm FMS. Up to 50mm shaft length available (special order ). Shaft Lock: L = With Shaft Lock. Blank = Without Shaft Lock. Style: Blank = Panel Mount, Single Unit, Single Shaft, Right Angle Ear-Lug Terminals. G = Panel Mount, Ganged Tandem Unit, Single Shaft, Right Angle Ear-Lug Terminals on Each Unit. Size: 281 = 28mm Diameter. TOCOS Series Name: GF = Cermet Film Element. Standard Resistance Values and Part Numbering Codes Standard Nominal Total Resistance Values and Part Numbering Codes Resistance ( Ω ) Code Resistance ( Ω ) Code Resistance ( Ω ) Code Resistance ( Ω ) Code Resistance ( Ω ) Code 100 200 500 101 201 501 1,000 2,000 5,000 102 202 502 10,000 20,000 50,000 103 203 503 100,000 200,000 500,000 104 204 504 1,000,000 105 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. TOCOS AMERICA, INC. 1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 83 E-mail: [email protected] www.tocos.com