SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN)
● 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 698.)
● Stopper structure prevents terminal pin from being open.
● Cross slot rotor suitable for automatic adjustment
■
FEATURES
Part name Material Flammability
1
2
3
4
5
6
7
8
9
Wiper
Cover
Housing
Terminal pin
Base element
“O” ring
Rotor
Electrode
Resistive element
Multi metal alloy
—
Stainless steel
(SUS 304)
Epoxy UL94V-0
Copper alloy, Sn-Cu-plated
—
Ceramic
Silicone rubber UL94HB
Polyphenylenesulphide UL94V-0
Ag-Pd cermet
—
RuO2 cermet
INTERNAL STRUCTURE
■
PART NUMBER DESIGNATION
※Please refer to the LIST OF PART NUMBERS when placing orders.
S T - 4 E T A 2 0 0 Ω ( 2 0 1 )
Series name (minus slot)
Form of packaging
T：Taping (Reel)
Blank：Bulk in plastic bag
Terminal pin
E：Sn-Cu (Lead-free)
Form of packaging
T：Taping (Reel)
Blank：Bulk in plastic bag
Terminal pin
E：Sn-Cu (Lead-free)
Resistance code
Resistance value
Product shape (Shape of terminal)
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) Resistance code
Resistance value
Product shape (Shape of terminal)
A, G：J-hook
B, D, H：Gull wing
C, F：Through hole pins
ST-4
ST-4 構造図
1
6
8
4
3
9
5
7
2
RoHS compliant
Top
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 (
G (
B (
C (
F (
D (
H (
)
)
)
)
)
)
)
J-hook
J-hook
Gull wing
Gull wing
Gull wing
Through hole pins
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 k Ω 2 k Ω 5 k Ω
10 k Ω 20 k Ω 50 k Ω 100 k Ω 200 k Ω 500 k Ω 1 M Ω 2 M Ω
ΔR/R：Change in total resistance
S.S. ：Setting stability
■
ELECTRICAL CHARACTERISTICS
■
MECHANICAL CHARACTERISTICS
10
Ω
~ 2 M
Ω
± 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 M
Ω
: ± 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/s2, 6 ms
6 directions for 3 times each [ΔR/R ≦ 1 %]
[S.S. ≦ 1 %]
Vibration
(Amplitude) 1.52 mm or
(Acceleration) 196 m/s2,
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 ℃
Pre Heating Zone
180 ℃
(℃)
250
200
150
100
50
150 ℃
90 ± 30 s
30 ± 10 s
Soldering Zone
Heating time
Temperature
℃
+5
0
Flow :
260 ± 3 °C as the temperature in a
pot of molten solder, immer sion from head of
ter minal 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
2
222
1.6 1.6
2.35
0
2
242
1.6 1.6
2.35
0
2
5.6
1.6 1.6
2.35
0
1.5 1.5
2
2
1.6 1.6
2.35
0
2.5
0.3 0.8
2
2.8
1.6 1.6
2.35
0
3.3
0.3 0.8
■
MAXIMUM INPUT RATINGS
Nominal resistance values ( Ω)Resistance code Maximum input voltage (V) Maximum wiper current (mA)
A 10 100 1.00 100
A 20 200 2.00 100
50 500 3.53 70.7
100 101 5.00 50.0
200 201 7.07 35.4
500 501 11.2 22.4
1 k 102 15.8 15.8
2 k 202 22.4 11.2
5 k 502 35.4 7.07
10 k 103 50.0 5.00
20 k 203 70.7 3.54
50 k 503 112 2.24
100 k 104 158 1.58
200 k 204 200 1.00
500 k 504 200 0.40
1 M 105 200 0.20
2 M 205 200 0.10
■
RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS
(Unit: mm)
● ST-4EA
● ST-4EG ● ST-4EH
● ST-4EB ● ST-4ED
Note) The zero point is the center of mounting.
The products indicated by A
mark are manufactured upon
receipt of order basis.
ST-4
SURFACE MOUNT TRIMMERS
ΔR/R：Change in total resistance
S.S. ：Setting stability
ST-4C 外形図
5
4.5
41
3 – 0.6
2.54
5
2Resistance code &
Production date code
t = 0.15
312.3
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
ST-4B 外形図
5
4.5
2.3
6.2
0.35 min.
0.35 min.
1.2
2.35
2 – 0.8
2
Resistance code &
Production date code
t = 0.15
31
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
ST-4A 外形図
20.6 W × 2.3 L × 0.5 D
Resistance code &
Production date code
Lead-free Identification mark
5
4.5
2.3
t = 0.15
1.2
2.35
2 – 0.8
5.2 0
– 0.5
3
31
ST-4
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS Unless otherwise specified, tolerance : ± 0.3 (Unit: mm)
● ST-4EA
Top adjustment
● ST-4EB
Top adjustment
● ST-4EC
Top adjustment
※
Note the terminal position.
CW rotation
1
2
3
ST-4G 外形図
5
3.1
5.7+ 0.4
0
4.5
2.35
2 – 0.8
1.2
1.45
(2.1)
0.95
2
Resistance code &
Production date code
t = 0.15
3
1
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
● ST-4EG
Side adjustment
● ST-4EF
Rear adjustment
● ST-4EH
Side adjustment
● ST-4ED
Rear adjustment
※
Note the terminal position.
＜
Semi-standard products
＞
＜
Semi-standard products
＞
ST-4D 外形図
5
4.5
2.3
1.2
2.35
2 – 0.8
7.2
0.50.5
2.8
2Resistance code &
Production date code
t = 0.15
31
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
ST-4F 外形図
5
4.5
2.3
3 – 0.6
2.54
6.35
2.50.5
2Resistance code &
Production date code
t = 0.15
31
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
● ST-42E
B CROSS SLOT DIMENSION
0.6 W × 2.3 L × 0.5 D
Cross slot screwdriver 0 bit : 0.8 D
ST-4H 外形図
5
3.1
5.7+ 0.4
0
4.5
2.35
2 – 0.8
1.2
6.1
0.8 2
Resistance code &
Production date code
t = 0.15
31
0.6 W × 2.3 L × 0.5 D
Lead-free Identification mark
CW rotation
1
2
3
ST-4
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS Unless otherwise specified, tolerance : ± 0.3 (Unit: mm)
<Bulk pack specifications>
● Unit of bulk in a plastic bag is 100 pcs. per pack.
● Boxing of bulk in a plastic bag is performed with 500
pcs. per box.
■
PACKAGING SPECIFICATIONS
Maximum number of consecutive missing pieces = 2
Leader length and reel dimension are shown in the dia-
grams below.
<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.
● ST-4ETA, ETB and ETD versions are boxed with 4 reels
(2000 pcs.).
ST-4ETG and ETH versions are boxed with one reel
(500 pcs.).
● EMBOSSED TAPE DIMENSIONS ● REEL DIMENSIONS
（Conforms to JIS C 0806-3）
（In accordance with EIAJ ET-7200A）
(Unit: mm)
● ST-4ETA/ETB/ETD ● ST-4ETG/ETH
Empty Filled Empty
40 mm min. 20 pitches min.
400 mm min.
Direction of feed
HeadEnd
Leader
180 (ST-4ETA/ETB/ETD)
254 ± 2 (ST-4ETG/ETH)
21±0.8
13±0.2
2±0.5
13 (ETA/ETB)
0
–1.5
+1
0
13.4±1(ETG/ETH)
15.4±1 (ETA/ETB/ETD)
17.4±1 (ETG/ETH)
60 (TA/TB)
+1
0
50 min.(TG/TH)
1.75 ± 0.15.5 ± 0.05
12
Direction of feed
0.3 ± 0.1
8 ± 0.1
4 ± 0.12 ± 0.05
φ
1.5
φ
1.5
+0.1
0
2.7 (ST-4ETA/ETB)
3.4 (ST-4ETD)
Installation example
(ST-4EA)
Lead-free Identification mark
φ
1.5
+0.1
0
2 ± 0.1 4 ± 0.1
8 ± 0.1
0.3 ± 0.1
1.75 ± 0.15.5 ± 0.1
12
6.4
Installation example
(ST-4EG)
Direction of feed
ST-4
SURFACE MOUNT TRIMMERS
