refer to the LIST OF PART NUMBERS when placing orders.
Specifications are subject to change without notice.
COPAL ELECTRONICS
SURFACE MOUNT TRIMMERS
ST-7
■
LIST OF PART NUMBERS
Adjustment
position
Form of packaging
Shape of terminal
Taping (reel)
Plastic bag
<Nominal resistance values>
50
Ω
10 kΩ
100
Ω
200
Ω
500
Ω
20 kΩ
1 kΩ
2 kΩ
5 kΩ
50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ
Fig. 1
A (
J-hook
)
Top adjustment
ST-7ETA
ST-7ETB
500 pcs./reel
ST-7EA
ST-7EB
50 pcs./pack
B (
Gull wing
)
Pieces in package
※
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.
■
ELECTRICAL CHARACTERISTICS
Nominal resistance range
Resistance tolerance
Power ratings
Resistance law
Maximum input voltage
Maximum wiper current
Effective electrical turn
End resistance
C.R.V.
Operating temp. range
Temp. coefficient
Insulation resistance
Dielectric strength
Net weight
50
Ω
~ 1 MΩ
±
20 %
0.25 W (70 °C) 0 W (125 °C)
Linear law
DC200 V or power rating, whichever is smaller
100 mA or power rating, whichever is smaller
2.5 turns
1 % or 2
Ω,
whichever is greater
1 % or 3
Ω,
whichever is greater
−
55 ~ 125 °C
50
Ω
:
±
250 10 /°C maximum
100
Ω
~ 1 MΩ :
±
100 10
-6
/°C maximum
-6
■
MECHANICAL CHARACTERISTICS
Mechanical turn
Operating torque
Mechanical stop
Rotational life
Thrust to shaft
Solderability
Shear (Adhesion)
Substrate bending
Pull-off strength
3 turns
5 mN·m {51 gf·cm} maximum
Clutch action
100 cycles [
Δ
R/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
{ }
：
Reference only
■
ENVIRONMENTAL CHARACTERISTICS
Test item
Thermal shock
Humidity
Shock
Vibration
Test conditions
−65
~ 125 °C (0.5 h), 5 cycles
−10
~ 65 °C (80 ~ 98 %),
10 cycles, 240 h
981 m/s
2
, 6 ms
6 directions for 3 times each
Amplitude 1.52 mm or
Acceleration 196 m/s
2
,
10 ~ 2000 Hz, 3 directions, 12 times each
70 °C, 0.25 W, 1000 h
Specifications
[
Δ
R/R
≦
2 %]
[S.S.
≦
1 %]
[
Δ
R/R
≦
2 %]
1000 MΩ minimum (DC500 V)
AC600 V, 60 s
Approx. 0.25 g
[
Δ
R/R
≦
1 %]
[S.S.
≦
1 %]
[
Δ
R/R
≦
3 %]
[S.S.
≦
1 %]
[
Δ
R/R
≦
2 %]
[S.S.
≦
2 %]
[
Δ
R/R
≦
3 %]
[S.S.
≦
2 %]
No leaks (No continuous bubbles)
Reflow profile for soldering heat evaluation
〉
Load life
(°C)
250
Temperature
200
150
100
50
Peak : 250
+5
0
°C
Low temp. operation
High temp. exposure
Immersion seal
−55
°C, 2 h
125 °C, 250 h
85 °C, 60 s
Over 230
°C
180
°C
150
°C
Pre Heating Zone
90
±
30 s
30
±
10 s
Heating time
Soldering Zone
Soldering heat
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
[
Δ
R/R
≦
1 %]
Reflow : two times maximum
Δ
R/R：Change in total resistance
S.S.
：Setting
stability
■
Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request.
COPAL ELECTRONICS
SURFACE MOUNT TRIMMERS
ST-7
■
MAXIMUM INPUT RATINGS
Nominal resistance
input
Resistance code Maximum (V)
values (Ω)
voltage
50
100
200
500
1k
2k
5k
10 k
20 k
50 k
100 k
200 k
500 k
1M
500
101
201
501
102
202
502
103
203
503
104
204
504
105
3.53
5.00
7.07
11.2
15.8
22.4
35.4
50.0
70.7
112
158
200
200
200
Maximum wiper
current (mA)
70.7
50.0
35.4
22.4
15.8
11.2
7.07
5.00
3.54
2.24
1.58
1.00
0.40
0.20
■
RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS
●
ST-7EA
2
●
ST-7EB
2
2
2
3.5
2
1.6
2.35
1.6
1.6
2.35
Note) The zero point is the center of mounting.
(Unit: mm)
1.6
■
OUTLINE DIMENSIONS
●
ST-7EA
Top adjustment
6.4
Lead-free Identification mark
Unless otherwise specified, tolerance :
±
0.3 (Unit : mm)
1
0.5 W
×
1.8 L
×
0.5 D
1.5
1.5
3.4
0
6.8
–0.5
3
CW rotation
2
1.2
2
4.3
6.1
1
t = 0.15
0.02 min.
2.3
2 – 0.8
3
Resistance code & Production date code
●
ST-7EB
Top adjustment
6.4
2
Lead-free Identification mark
0.5 W
×
1.8 L
×
0.5 D
1.5
1.5
3.4
0.35 min.
1.2
6.1
1
3
0.35 min.
t = 0.15
7.8
2 – 0.8
2.3
0.02 min.
Resistance code & Production date code
※
The ST-7 series has a different terminal arrange-ment from the ST-32 and ST-4 series.
Pay attention to the location of terminals number 1 and 3. (Resistance decreases when
the shaft is turned CCW.)
■
Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request.
2
5.5
0
0
COPAL ELECTRONICS
SURFACE MOUNT TRIMMERS
ST-7
■
PACKAGING SPECIFICATIONS
<Taping packaging specifications>
●
Taping version is packaged in 500 pcs. per reel.
Orders will be accepted for units of 500 pcs., i.e., 500, 1000, 1500 pcs., etc.
●
Taping version is boxed with one reel (500 pcs.).
Maximum number of consecutive missing pieces = 2
Leader length and reel dimension are shown in the dia-grams below.
●
EMBOSSED TAPE DIMENSIONS
●
REEL DIMENSIONS
（Conforms
to JIS C 0806-3）
（In
accordance with EIAJ ET-7200A）
(Unit: mm)
Empty
Filled
Empty
17.4±1
End
40 mm min.
20 pitches min.
Leader
Direction of feed
400 mm min.
13±0.2
254±2
21.4±1
●
ST-7ETA
1.75±0.1
12±0.1
4±0.1
2±0.1
0.4±0.1
Installation example
(ST-7EA)
●
ST-7ETB
1.75±0.1
12±0.1
4±0.1
2±0.1
0.4±0.1
Installation example
(ST-7EB)
7.5±0.1
16
7.5±0.1
Direction of feed
5
Direction of feed
16
5
<Bulk pack packaging specifications>
●
Unit of bulk in a plastic bag is 50 pcs. per pack.
●
Boxing of bulk in a plastic bag is performed with 200 pcs. per box.
■
Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request.
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