G4
Series
TOCOS
POTENTIOMETERS
®
4mm Surface Mount, Single-Turn, Sealed Cermet Trimmers
Features
4mm square SMD, single-turn, sealed cermet trimmers
Available in J-hook and gull-wing terminal configurations
Top, side and bottom adjustment in single-slot or automatic adjust cross-slot design
Tape and reel packaging
High setting accuracy, zero backlash
Meets EIA, EIAJ, IPC, VECI standard SMD trimmer designs
Designed for flow, reflow or infrared reflow soldering
Sealed to withstand immersion cleaning processes
Specifications
Electrical
Standard Resistance Range
. . . . . . . . . . . . . . 50Ω to 2MΩ
(standard 1, 2 & 5 sequence)
Resistance Tolerance
. . . . . . . . . . . . . . . . . 20% standard
10% optional for 100Ω to 1MΩ
End Resistance
. . . . . . . . . . 1% or 3Ω, whichever is greater
Resistance Taper
. . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear
Peak Noise (C.R.V.)
. . . . . . . 2% or 3Ω, whichever is greater
Power Rating
. . . . . . . 0.25 watt at
70 C; 0 watt at
125 C
Maximum Input Voltage
. . . . . . . . 200VDC or power rating,
whichever is smaller
Temperature Coefficient
. . . .
100 ppm / C, 200Ω to 1MΩ
250 ppm / C, other values
Environmental
Temperature Range
. . . . . . . . . . . . . . . . .
Low Temperature Operation
. . . . . . . . .
55 C to
125 C
55 C, 0.25 watt,
45 minutes
)
2%, S.S.
)
2%
∆T/R
High Temperature Exposure
. . . . . . . . . 125 C, 250 hours
∆T/R
)
2%, S.S.
)
2%
Load Life
. . . . . . . . . . . . . . . .
70 C, 0.25 watt, 1,000 hours
∆T/R
)
3%, S.S.
)
2%
Thermal Shock
. . . . . . . . . . . . . . . . . . . . . . 55 C, 125 C,
30 minutes each, 5 cycles
∆T/R
)
2%, S.S.
)
1%
Shock
. . . . . . . . . . . . 100G, 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,
0.25 watt, 500 hours
∆T/R
)
3%, S.S.
)
2%
Insulation Resistance
. . . . . . . 100MΩ minimum at 500VDC
Dielectric Strength
. . . . . . . . . . . . . . . . . . 500VAC, 1 minute
Adjustment Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 200
10
Mechanical
Mechanical Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 240
Shaft Torque
. . . . . . . . . . . . . . . 150
gf
•
cm
(2.08
oz
•
in)
10
max.
Stop Strength
. . . . . . . . . . . . . . 300 gf
•
cm (4.16 oz
•
in) min.
Flammability of Plastic Materials
. . . . . . . Meets UL 94V-0
Nominal Weight
. . . . . . . . . . . . . . . . . . . . . 0.14g (A, B, D, E)
0.16g (BF); 0.24g (S)
Marking
. . . . . . . . . . . . Resistance value or code, date code
Moisture Resistance
. . . . . . 10 C to 65 C, 80-98%RH,
0.25 watt, 10 cycles, 240 hours
∆T/R
)
3%
Soldering Heat Resistance
. . . . . . . . . . 260 C, 10 seconds
∆T/R
)
1%
Seal Test
. . . . . . . . . . . . . . . .
85 C, hot water for 1 minute
Rotational Life
. . . .100 cycles without discontinuity, no load
∆T/R
)
5%
∆T/R
= Total Resistance Change; S.S. = Setting Stability ( voltage ratio )
For through-hole models of the G4 series,
refer to the G4C Series on page 33.
14
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
G4 Series
All A, B, D & E Models
Position of Rotor Inside
#1
#3
Standard and Reverse Markings
Standard Markings
Outside Positions
#1
#3
Reverse Markings
Outside Positions
#1
#3
#2
#2
#2
Position of the rotor inside is the
same for both types of markings.
G4A & G4B
G4D & G4E
The D and E reverse markings models have the same parts and are constructed the same as the A and B models respectively.
The only difference is the outside markings.
Dimensions
G4A
J-Hook, Single-Slot, Top Adjust
2.7
0.3,
0
G41A
J-Hook, Cross-Slot, Top Adjust
2.7
0.3,
0
Unit: mm
5.0
0.3
#2
1.2
1.2
0.15
5.0
0.3
#2
1.2
1.2
0.15
4.5
0.3
2.7
0.3
5.2
0.3
4.5
0.3
503
#3
51
#1
0.2
503
#3
0.1
0.05
0.15
0.8 (2)
0.15
SLOT
0.6W 2.6L
0.6D
2.3
0.3
G4D
Reverse Markings, J-Hook, Single-Slot, Top Adjust
2.7
0.3,
0
5.0
0.3
#2
1.2
4.5
0.3
2.7
0.3
5.2
0.3
51
#3
#1
0.2
0.1
SLOT
0.6 W 2.6 L
0.6D
0.05
0.15
G4S
J-Hook, Single-Slot, Side Adjust
5.0
0.3
G41S
J-Hook, Cross-Slot, Side Adjust
4.5
0.3
5.7
0.3
5.7
0.3
503
0.1
51
3.5
0.3
0.7
1.1
503
0.1
2.5
0.3
SLOT
0.6W 2.6L
2.5
0.3
0.6D
5.2
0.5
0.45
#1
#3
0.15
(2)
#1
#3
0.9
0.3
#2
0.6
0.15
0.9
0.3
#2
0.6
0.15
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
51
51
2.7
0.3
503
51
51
51
5.2
0.3
51
#1
0.2
0.1
0.05
0.15
0.8(2)
0.15
2.3
0.3
1.2
0.15
0.8(2)
0.15
2.3
0.3
5.0
0.3
4.5
0.3
51
3.5
0.3
0.7
1.1
5.2
0.5
0.45
0.15
(2)
15
Switching Power Supply Study Group
京公网安备 11010802033920号
EEWORLD
