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 81 specifications electrical standard resistance range . . . . . . . . . . . . . 100 ? to 1m ? resistance tolerance . . . . . . . . . . . . . . . . . 10% standard end resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ? max. resistance taper . . . . . . . . . . . . . . . . . . . . . . . . . . b = linear peak noise (c.r.v.) . . . . . . . 3% or 5 ? , whichever is greater power rating . . . . . . . . 2 watts at 70 c, 0 watt at 120 c maximum input voltage . . . . . . . . 400vdc or power rating, whichever is smaller temperature coefficient . . . 100 ppm / c, 200 ? to 500k ? 2 50 ppm / c, other values dielectric strength . . . . . . . . . . . . . . . . 1,000vac, 1 minute mechanical mechanical travel . . . . . . . . . . . . . . . . . . . . . . . . . 295 10 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 . . . . . . . . . . . . . . . . . . . . . . . 235 c, 5 seconds marking . . . . . . . . . . . . . . . . . . model type, taper, resistance, shaft type, terminal identification, date code environmental temperature range . . . . . . . . . . . . . . . . . 10 cto 120 c low temperature operation . . . . . . . . . 10 c, 45 minutes with rated load ? t/r ) 3% load life . . . . . . . . . . . . 70 c, 1,000 hours with rated load ? t/r ) 5% vibration . . . . . . . . . . . . . . . . . . .10-55hz, 1.5mm amplitude, 3 directions, 2 hours each ? t/r ) 1% soldering heat resistance . . . . . . . . . . . 350 c, 3 seconds ? t/r ) 2% rotational life . . . . 15,000 cycles (500 cycles for shaft lock models only) without load ? t/r ) 10% ? t/r = total resistance change gf281 series 28mm diameter, single-turn, cermet industrial panel controls tocos panel controls 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 gf281g gf281
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 82 gf281 single-turn & gfv281 6-turn (special order) panel mount, single unit, single shaft right angle ear-lug terminals unit: mm dimensions gf281 series gf281g panel mount, ganged tandem unit, single shaft right angle ear-lug terminals on each unit gf281l panel mount, single unit, single shaft with shaft lock right angle ear-lug terminals recommended panel mounting holes recommended panel mounting holes 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 83 resistance ( ? ) 100 200 500 resistance ( ? ) 1,000 2,000 5,000 resistance ( ? ) 10,000 20,000 50,000 resistance ( ? ) 100,000 200,000 500,000 resistance ( ? ) 1,000,000 code 101 201 501 code 102 202 502 code 103 203 503 code 104 204 504 code 105 standard nominal total resistance values and part numbering codes standard resistance values and part numbering codes 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. gf g 281 103 k l s b 15 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 = 10 ? ;101 =100 ? ; 102 = 1,000 ? ; 103 = 10,000 ? ; 105 = 1,000,000 ? ). 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. part numbering system gf281 series note: fms = from mounting surface
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