SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN)
ST-4
INTERNAL STRUCTURE
2
1
7
6
5
3
4
Part name
RoHS compliant
9
Material
8
Flammability
1
Wiper
Cover
Housing
Terminal pin
Base element
“O” ring
Rotor
Electrode
Resistive element
Multi metal alloy
—
Stainless steel (SUS 304)
Epoxy
Copper alloy, Sn-Cu-plated
—
Ceramic
Silicone rubber
Polyphenylenesulphide
Ag-Pd cermet
—
RuO
2
cermet
UL94HB
UL94V-0
UL94V-0
■
FEATURES
RoHS compliant
Wide variety (7 types) to choose from
Automatic mounting is possible (Taping)
Flow/reflow soldering is possible
Sealed construction (Washable: Refer to page 750.)
Stopper structure prevents terminal pin from being open.
Cross slot rotor suitable for automatic adjustment
2
3
4
5
6
7
8
9
■
PART NUMBER DESIGNATION
S T - 4 E T A 2 0 0
Ω
( 2 0 1 )
Series name (minus slot)
Terminal pin
E：Sn-Cu (Lead-free)
Resistance code
Resistance value
Product shape (Shape of terminal)
Form of packaging
T：Taping (Reel)
Blank：Bulk in plastic bag
A, G：J-hook
B, D, H：Gull wing
C, F：Through hole pins
S T - 4 2 E T A 2 0 0
Ω
( 2 0 1 )
Series name (cross slot)
Terminal pin
E：Sn-Cu (Lead-free)
Resistance code
Resistance value
Product shape (Shape of terminal)
Form of packaging
T：Taping (Reel)
Blank：Bulk in plastic bag
A, G：J-hook
B, D, H：Gull wing
C, F：Through hole pins
※Please
refer to the LIST OF PART NUMBERS when placing orders.
ST-4
SURFACE MOUNT TRIMMERS
■
LIST OF PART NUMBERS
Adjustment Shape of terminal
position
A (J-hook)
Form of packaging
Taping (reel)
ST-4/42ETA
ST-4/42ETB
Plastic bag
ST-4/42EA
ST-4/42EB
ST-4/42EC
A
ST-4/42ETD
A
A
ST-4/42ETG
ST-4/42ETH
500 pcs./reel
ST-4/42ED
ST-4/42EF
〈
Nominal resistance values
〉
A
10
Ω
A
20
Ω
50
Ω
100
Ω
200
Ω
500
Ω
1 kΩ
2 kΩ
2 MΩ
5 kΩ
10 kΩ
20 kΩ
50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ
Fig. 1
：
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
□
Top
adjustment
B (Gull wing)
C (Through hole pins)
Rear
adjustment
Side
adjustment
D (Gull wing)
F (Through hole pins)
G (J-hook)
H (Gull wing)
ST-4/42EG
ST-4/42EH
100 pcs./pack
Pieces in package
■
MECHANICAL CHARACTERISTICS
Mechanical angle
Operating torque
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
The products indicated by
A
mark are manufactured upon receipt of order basis.
※C
slot : ST-4E
□
,
B
slot : ST-42E
□
■
ELECTRICAL CHARACTERISTICS
Nominal resistance range
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
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 MΩ minimum (DC500 V)
Stop strength
Rotational life
Thrust to rotor
Solderability
Shear (Adhesion)
Substrate bending
Pull-off strength
{ }
：
Reference only
■
ENVIRONMENTAL CHARACTERISTICS
Test item
Thermal shock
Humidity
Shock
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
[ΔR/R
≦
2 %]
[S.S.
≦
1 %]
[ΔR/R
≦
2 %]
[ΔR/R
≦
1 %]
[S.S.
≦
1 %]
[ΔR/R
≦
3 %]
[S.S.
≦
1 %]
AC500 V, 60 s
Approx. 0.12 g (ST-4EA, EB, EC, ED, EF)
Approx. 0.22 g (ST-4EG, EH)
Vibration
Load life
Reflow profile for soldering heat evaluation
〉
(C)
250
Temperature
200
150
100
50
Peak : 250
+5
0
Low temp. operation
High temp. exposure
−55
°C, 2 h
125 °C, 250 h
85 °C, 60 s
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
[ΔR/R
≦
2 %]
[S.S.
≦
2 %]
[ΔR/R
≦
3 %]
[S.S.
≦
2 %]
No leaks (No continuous bubbles)
C
Immersion seal
Over 230 C
180 C
150 C
90 30 s
30 10 s
Heating time
Soldering Zone
Pre Heating Zone
Soldering heat
[ΔR/R
≦
1 %]
Reflow : two times maximum
ΔR/R：Change
in total resistance
S.S.
：Setting
stability
ST-4
SURFACE MOUNT TRIMMERS
■
MAXIMUM INPUT RATINGS
Nominal resistance values (Ω)
Resistance code
100
200
500
101
201
501
102
202
502
103
203
503
104
204
504
105
205
Maximum input voltage (V)
1.00
2.00
3.53
5.00
7.07
11.2
15.8
22.4
35.4
50.0
70.7
112
158
200
200
200
200
Maximum wiper current (mA)
A
A
10
20
50
100
200
500
1k
2k
5k
10 k
20 k
50 k
100 k
200 k
500 k
1M
2M
100
100
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
0.10
The products indicated by
A
mark are manufactured upon
receipt of order basis.
■
RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS
(Unit: mm)
ST-4EA
2
ST-4EB
2
ST-4ED
2
1.5
2
2
4
0
1.6
2.35
1.6
2.35
1.6
0
1.6
2.35
3.3
2.8
Note) The zero point is the center of mounting.
2
2
2
0
0
1.6
2.35
1.6
1.6
ST-4EG
2
0.8
ST-4EH
2
0
0.3
2.5
0.3
1.6
1.6
2.35
2
0.8
1.6
1.5
5.6
ST-4
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS
Unless otherwise specified, tolerance :
±
0.3 (Unit: mm)
1
3
CW rotation
ST-4EA
Top adjustment
2
0.6 W
×
2.3 L
×
0.5 D
Resistance code &
Production date code
2
※
Note the terminal position.
1.2
t = 0.15
2 – 0.8
2.35
3
5
1
2.3
ST-4EB
Top adjustment
0.6 W
×
2.3 L
×
0.5 D
2
Resistance code &
Production date code
0.35 min.
1.2
4.5
Lead-free Identification mark
0.35 min.
6.2
2 – 0.8
2.35
3
5
1
t = 0.15
2.3
ST-4EC
Top adjustment
0.6 W
×
2.3 L
×
0.5 D
2
Resistance code &
Production date code
3 – 0.6
4.5
Lead-free Identification mark
3
5
1
2.3
t = 0.15
41
2.54
ST-4EG
Side adjustment
0.6 W
×
2.3 L
×
0.5 D
5
Resistance code &
Production date code
2.35
4.5
3
1.45
2 – 0.8
1
0
5.7
+ 0.4
3.1
Lead-free Identification mark
(2.1)
0.95
1.2
t = 0.15
5
2
3
Lead-free Identification mark
0.5
5.2
– 0
4.5
ST-4
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS
Unless otherwise specified, tolerance :
±
0.3 (Unit: mm)
1
3
CW rotation
ST-4EH
Side adjustment
0.6 W
×
2.3 L
×
0.5 D
5
Resistance code &
Production date code
2
※
Note the terminal position.
2.35
4.5
2 – 0.8
3
1
0
5.7
+ 0.4
3.1
Lead-free Identification mark
0.8
6.1
t = 0.15
2
1.2
ST-4ED
Rear adjustment
0.6 W
×
2.3 L
×
0.5 D
2
＜
Semi-standard products
＞
1.2
0.5
Resistance code &
Production date code
4.5
Lead-free Identification mark
0.5
7.2
2 – 0.8
2.3
2.8
t = 0.15
3
5
1
2.35
ST-4EF
Rear adjustment
0.6 W
×
2.3 L
×
0.5 D
2
Resistance code &
Production date code
＜
Semi-standard products
＞
3 – 0.6
Lead-free Identification mark
3
5
1
2.50.5
2.3
t = 0.15
2.54
ST-42E
B
CROSS SLOT DIMENSION
0.6 W
×
2.3 L
×
0.5 D
Cross slot screwdriver 0 bit : 0.8 D
6.35
4.5
