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ST-4/42EC Datasheet(PDF) 2 Page - Copal Electronics

Part No. ST-4/42EC
Description  SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN)
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Manufacturer  COPAL [Copal Electronics]
Direct Link  http://www.nidec-copal-electronics.com/e
Logo COPAL - Copal Electronics

ST-4/42EC Datasheet(HTML) 2 Page - Copal Electronics

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adjustment
Nominal resistance range
ST-4
SURFACE MOUNT TRIMMERS
Not manufactured
※The above part numbers are all available with the respective combination of
<Nominal resistance values> (Fig. 1).
※Verify the above part numbers when placing orders.
※Taping specification is not sold separately and must be purchased in reel units.
※Cross slot available : ST-42E □
LIST OF PART NUMBERS
Adjustment
position
Rear
adjustment
Side
adjustment
Pieces in package
Shape of terminal
A (J-hook)
G (J-hook)
B (Gull wing)
D (Gull wing)
H (Gull wing)
C (Through hole pins)
F (Through hole pins)
Form of packaging
Taping (reel)
ST-4/42ETA
ST-4/42EA
ST-4/42ETB
ST-4/42EB
ST-4/42EC
A ST-4/42ETD
A ST-4/42ED
A ST-4/42EF
ST-4/42ETG
ST-4/42EG
ST-4/42ETH
ST-4/42EH
Plastic bag
500 pcs./reel
100 pcs./pack
The products indicated by
A mark are manufactured upon receipt of order basis.
C slot : ST-4E □ , B slot : ST-42E □
Nominal resistance values
A10
Ω A20 Ω 50 Ω 100 Ω 200 Ω 500 Ω 1 kΩ
2 k
Ω
5 k
Ω
10 k
Ω 20 kΩ 50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ 2 MΩ
ΔR/R:Change in total resistance
S.S.
:Setting stability
ELECTRICAL CHARACTERISTICS
MECHANICAL CHARACTERISTICS
10
Ω ~ 2 MΩ
± 20 %
0.25 W (70 °C) 0 W (125 °C)
Linear law (B)
DC200 V or power rating, whichever is smaller
100 mA or power rating, whichever is smaller
210° (1 turn)
1 % or 2
Ω, whichever is greater
1 % or 3
Ω, whichever is greater
−55 ~ 125 °C
10
Ω ~ 50 Ω : ± 250 10-6/°C maximum
100
Ω ~ 2 MΩ : ± 100 10-6/°C maximum
1000 M
Ω minimum (DC500 V)
AC500 V, 60 s
Approx. 0.12 g (ST-4EA, EB, EC, ED, EF)
Approx. 0.22 g (ST-4EG, EH)
Resistance tolerance
Power ratings
Resistance law
Maximum input voltage
Maximum wiper current
Effective electrical angle
End resistance
C.R.V.
Operating temp. range
Temp. coefficient
Insulation resistance
Dielectric strength
Net weight
Mechanical angle
240° (1 turn)
10 mN·m {102 gf·cm} maximum
30 mN·m {306 gf·cm} minimum
100 cycles [
ΔR/R ≦
± (2 Ω +3 %)]
5 N {0.51 kgf} minimum
245
± 3 °C, 2 ~ 3 s
5 N {0.51 kgf} 10 s
Width 90 mm, bend 3 mm, 5 s, 1 time
5 N {0.51 kgf} 10 s
Operating torque
Stop strength
Rotational life
Thrust to rotor
Solderability
Shear (Adhesion)
Substrate bending
Pull-off strength
ENVIRONMENTAL CHARACTERISTICS
Test item
Test conditions
Specifications
Thermal shock
−65 ~ 125 °C (0.5 h), 5 cycles
[
ΔR/R ≦ 2 %]
[S.S.
≦ 1 %]
Humidity
−10 ~ 65 °C (80 ~ 98 %),
10 cycles, 240 h
[
ΔR/R ≦ 2 %]
Shock
981 m/s
2, 6 ms
6 directions for 3 times each
[
ΔR/R ≦ 1 %]
[S.S.
≦ 1 %]
Vibration
(Amplitude) 1.52 mm or
(Acceleration) 196 m/s
2,
10 ~ 2000 Hz, 3 directions, 12 times each
Load life
70 °C, 0.25 W 1000 h
[
ΔR/R ≦ 3 %]
[S.S.
≦ 1 %]
Low temp. operation
−55 °C, 2 h
[
ΔR/R ≦ 2 %]
[S.S.
≦ 2 %]
High temp. exposure
125 °C, 250 h
[
ΔR/R ≦ 3 %]
[S.S.
≦ 2 %]
Immersion seal
85 °C, 60 s
No leaks (No continuous bubbles)
Soldering heat
[
ΔR/R ≦ 1 %]
Fig. 1
{ }Reference only
Reflow profile for soldering heat evaluation
Reflow : two times maximum
Peak : 250
Over 230 C
Pre Heating Zone
180 C
(C)
250
200
150
100
50
150 C
90 30 s
30 10 s
Soldering Zone
Heating time
C
+5
0
Flow : 260
± 3 °C as the temperature in a
pot of molten solder, immersion from head
of terminal to backside of board, 5 ~ 6 s,
two times maximum
Reflow : Peak temperature 255 °C
(Please refer to the profile below.)
Manual soldering
:350
± 10 °C, 3 ~ 4 s


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