GF12
Series
TOCOS
POTENTIOMETERS
®
12mm Square, Single-Turn, Through-Hole Sealed Cermet Trimmers
Features
12mm square, single-turn, through-hole, sealed cermet trimmers
Stable, infinite resolution cermet element
Unique 5,000 cycle rotational life
Meets UL 94V-0 flammability requirements
Top and side adjust models
4 standard styles, single-slot flush rotor, 5mm or 10mm single-slot metal shaft, or 8.2mm knurled plastic shaft
Sealed to withstand wave soldering and immersion cleaning
Optional 15, 20, 22, 25 or 30mm metal shafts available
Specifications
Electrical
Standard Resistance Range
. . . . . . . . . . . . . . 10Ω to 1MΩ
(standard 1, 2 & 5 sequence )
Resistance Tolerance
. . . . . . . . . . . . . . .
10% and
20%
End Resistance
. . . . . . . . . . 1% or 3Ω, whichever is greater
Resistance Taper
. . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear
Peak Noise (C.R.V.)
. . . . . . 2% or 3Ω, whichever is greater
Power Rating
. . . . . . . 0.75 watt at
70 C, 0 watt at
125 C
Maximum Input Voltage
. . . . . . . . 300VDC or power rating,
whichever is smaller
Temperature Coefficient
. . . 100 ppm / C, 200Ω to 500kΩ
250 ppm / C, other values
Insulation Resistance
. . . . . . 100MΩ minimum at 500VDC
Dielectric Strength
. . . . . . . . . . . . . . . . . 900VAC, 1 minute
Adjustment Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 270
10
Environmental
Temperature Range
. . . . . . . . . . . . . . . . .
55 C to
125 C
High Temperature Exposure
. . . . . . . . . 125 C, 250 hours
∆T/R
)
3%, S.S.
)
1%
Load Life
. . . . . . . . . . . . . . . .
70 C, 0.75 watt, 1,000 hours
∆T/R
)
3%, S.S.
)
1%
Thermal Shock
. . . . . . . . . . . . . . . . . . . . . . 55 C, 125 C,
30 minutes each, 5 cycles
∆T/R
)
2%, S.S.
)
1%
Shock
. . . . . . . . . . . . . 50G, 6ms, 6 directions, 3 times each
∆T/R
)
1%, S.S.
)
1%
Vibration
. . . . . . . . . . . . . . . . 10-2,000Hz, 1.5mm amplitude,
20G, 12 hours
∆T/R
)
1%, S.S.
)
1%
Humidity
. . . . . . . . . . . . . . . . . . . . . . . .
40 C, 90-95%RH,
0.75 watt, 500 hours
∆T/R
)
3%, S.S.
)
1%
Mechanical
Mechanical Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 300
10
Shaft Torque
. . . . . . . . . . . . . . 300 gf
•
cm (4.16 oz
•
in) max.
Stop Strength
. . . . . . . . . . . . . . 1 kgf
•
cm (12.86 oz
•
in) min.
Flammability of Plastic Materials
. . . . . . . Meets UL 94V-0
Nominal Weight
. . . . . . . . . . 1.4g (P); 1.8g (S, X, R) no shaft
1.8g (P); 2.2g (S, X, R) 5mm metal shaft
2.1g (P); 2.5g (S, X, R) 10mm metal shaft
1.7g (P); 2.1g (S, X, R) with knurled plastic shaft
Marking
. . . . . . . . . Resistance code, date code, model type
Moisture Resistance
. . . . . . 10 C to 65 C, 80-98%RH,
0.75 watt, 10 cycles, 240 hours
∆T/R
)
3%
Soldering Heat Resistance
. . . . . . . . . . . 350 C, 3 seconds
∆T/R
)
1%
Seal Test
. . . . . . . . . . . . . . . . 85 C, hot water for 1 minute
Rotational Life
. . . . . . . . 5,000 cycles without discontinuity
∆T/R
)
5%)
∆T/R
= Total Resistance Change; S.S. = Setting Stability ( voltage ratio )
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
77
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