SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN)
ST-32
INTERNAL STRUCTURE
2
1
7
6
5
3
RoHS compliant
4
Part name
9 8
Material
Multi metal alloy
—
Stainless steel (SUS 304)
Epoxy
Copper alloy, Sn-Cu-plated
—
Ceramic
Silicone rubber
Polyphenylenesulphide
Flammability
■
FEATURES
RoHS compliant
Rotor with a cross slot for ease of adjustment
Leaded terminals provide strong as adhesive strength
against P.C.B. bending
J-hook, Gull wing and leaded terminal configurations
Sealed (Washable: Refer to page 750.)
1
2
3
4
5
6
7
8
9
Wiper
Cover
Housing
Terminal pin
Base element
“O” ring
Rotor
Electrode
Resistive element
UL94V-0
UL94HB
UL94V-0
Ag-Pd cermet
—
RuO
2
cermet
■
PART NUMBER DESIGNATION
S T - 3 2 E T A 1 0 0
Ω
( 1 2 )
Series name
Terminal pin
E：Sn-Cu (Lead-free)
Resistance code
Resistance value
Form of packaging
T：Taping (Reel)
Blank：Bulk in plastic bag
Product shape (Shape of terminal)
A, G：J-hook
B, H：Gull
wing
※Please
refer to the LIST OF PART NUMBERS when placing orders.
ST-32
SURFACE MOUNT TRIMMERS
■
LIST OF PART NUMBERS
Adjustment
position
Shape of
terminal
A (J-hook)
B (Gull wing)
G (J-hook)
H (Gull wing)
〈
Nominal resistance values
〉
A
10
Ω
A
20
Ω
Form of packaging
Taping (reel)
ST-32ETA
ST-32ETB
ST-32ETG
ST-32ETH
500 pcs./reel
Plastic bag
ST-32EA
ST-32EB
ST-32EG
ST-32EH
100 pcs./pack
50
Ω
3 kΩ
200 kΩ
100
Ω
5 kΩ
500 kΩ
200
Ω
10 kΩ
1 MΩ
300
Ω
20 kΩ
2 MΩ
500
Ω
30 kΩ
1 kΩ
50 kΩ
2 kΩ
100 kΩ
Top
adjustment
Side
adjustment
Pieces in package
Fig.1
The products indicated by
A
mark are manufactured upon receipt of order basis.
※The
part numbers on the left 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 angle
End resistance
C.R.V.
Operating temp. range
Temp. coefficient
Insulation resistance
Dielectric strength
Net weight
10
Ω
~ 2 MΩ
±
20 %
0.125 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 /°C maximum
100
Ω
~ 2 MΩ :
±
100 10
-6
/°C maximum
-6
■
MECHANICAL CHARACTERISTICS
Mechanical angle
Operating torque
Stop strength
Rotational life
Thrust to rotor
250 ° (1 turn)
5 mN·m {51 gf·cm} maximum
20 mN·m {204 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
Solderability
Shear (Adhesion)
Substrate bending
Pull-off strength
{ }
：
Reference only
1000 MΩ minimum (DC500 V)
AC500 V, 60 s
Approx. 0.05 g (ST-32EA, EB)
Approx. 0.11 g (ST-32EG, EH)
■
ENVIRONMENTAL CHARACTERISTICS
Test item
Thermal shock
Humidity
Shock
Test conditions
−
65 ~ 125 °C (0.5 h), 5 cycles
−10
~ 65 °C ,
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
Specifications
[ΔR/R
≦
2 %]
[S.S.
≦
1 %]
[ΔR/R
≦
2 %]
[ΔR/R
≦
1 %]
[S.S.
≦
1 %]
[ΔR/R
≦
3 %]
[S.S.
≦
1 %]
[ΔR/R
≦
2 %]
[S.S.
≦
2 %]
[ΔR/R
≦
3 %]
[S.S.
≦
2 %]
No leaks (No continuous bubbles)
Reflow profile for soldering heat evaluation
〉
Vibration
(C)
250
Temperature
200
150
100
50
Peak : 250
+5
0
C
Load life
Low temp. operation
High temp. exposure
70 °C, 0.125 W, 1000 h
−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
Over 230 C
180 C
150 C
90 30 s
30 10 s
Heating time
Soldering Zone
Soldering heat
Immersion seal
Pre Heating Zone
Reflow : two times maximum
[ΔR/R
≦
1 %]
ΔR/R：Change
in total resistance
S.S.
：Setting
stability
ST-32
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS
Unless otherwise specified, tolerance :
±
0.3 (Unit : mm)
1
3
CW rotation
ST-32EA
Top adjustment
Cross slot for a 0 bit driver, depth : 0.45
Production date code & Lead-free Identification mark
1 digit (Location reversed every 2 years)
1.5
0.5
0.6
1
2
※
Note the terminal position.
2
3.4
1.9
3.5
0.05
3
3.4
1
Resistance code 2 digits
2
t = 0.12
2.1
2 – 0.7
ST-32EB
Top adjustment
Cross slot for a 0 bit driver, depth : 0.45
2
Production date code & Lead-free Identification mark
1 digit (Location reversed every 2 years)
1.5
0.5
1
3.4
1.9
4.4
0.05
3
3.4
1
Resistance code 2 digits
2
t = 0.12
2.1
2 – 0.7
2
2
ST-32
SURFACE MOUNT TRIMMERS
■
OUTLINE DIMENSIONS
Unless otherwise specified, tolerance :
±
0.3 (Unit : mm)
1
3
CW rotation
ST-32EG
Side adjustment
Cross slot for a 0 bit driver, depth : 0.45
Production date code & Lead-free Identification mark
1 digit (Location reversed every 2 years)
3.6
1.5
0.5
3.5
0.2
3
2
※
Note the terminal position.
Adjustment
2.4
2 – 0.6
1
4.7
2.6
1.9
t = 0.12
Resistance code 2 digits
1
2
ST-32EH
Side adjustment
Cross slot for a 0 bit driver, depth : 0.45
Production date code & Lead-free Identification mark
1 digit (Location reversed every 2 years)
3
3.5
0.2
Adjustment
2.4
2 – 0.6
1
3.6
1.5
0.5
4.7
2.6
1.9
t = 0.12
Resistance code 2 digits
1
2
1.3
1.7
1.4
1.1
1.7
1
stm32/stm8
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