GF281
Series
TOCOS
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
Standard Resistance Range
. . . . . . . . . . . . . 100Ω to 1MΩ
Resistance Tolerance
. . . . . . . . . . . . . . . . .
10% standard
End Resistance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Ω max.
Resistance Taper
. . . . . . . . . . . . . . . . . . . . . . . . . . B = linear
Peak Noise (C.R.V.)
. . . . . . . 3% or 5Ω, 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, 200Ω to 500kΩ
250 ppm / C, other values
Environmental
Temperature Range
. . . . . . . . . . . . . . . . .
10 C to
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
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
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
GF281 Series
Panel Mount, Single Unit, Single Shaft
Right Angle Ear-Lug Terminals
Dimensions
Unit: mm
GF281 Single-Turn & GFV281 6-Turn (special order)
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
82
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
GF281 Series
GF 281 G L 15 S B 103 K
Part Numbering System
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
)
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
50,000
Code
103
203
503
Resistance (
Ω
)
100,000
200,000
500,000
Code
104
204
504
Resistance (
Ω
)
1,000,000
Code
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
E-mail: sales@tocos.com
www.tocos.com
83
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