C CO OP PA AL L E ELE LECT CTR RO ON NI IC CS S
SINGLE TURN
SURFACE MOUNT TYPE TRIMMERS
ST-3
INTERNAL STRUCTURE
8
7
1
6
2
5
4
3
Part name Material Flammability
� FEATURES
UL-94V-0
Rotor PPS(Polyphenylenesulphide)
1
� Small and thin (3.2 × 2.0 × 3.5 mm)
RuO cermet
Resistive element
2
2
� Sealed construction (Washable)
� Insulated rotor and case
3 Terminal (Leadless) Solder-plated
� Flow/reflow soldering is possible
—
4 Base element Ceramic
� Sure mechanical stops
Electrode Ag-Pd cermet
5
Wiper Multi metal alloy
6
UL-94HB
“O” ring Silicone rubber
7
UL-94V-0
Housing PPS(Polyphenylenesulphide)
8
CFCs, Halon, Carbon tetrachloride and designated bromic flame
retardant PBBOs and PBBs are not used in our products.
� PART NUMBER DESIGNATION
( )
S T - 3 T A 1 0 0 Ω 1 2
Series name Resistance code
Form of packaging Resistance value
T : Taping (Reel)
Blank : Bulk in vinyl bags
Product shape (Shape of terminal)
A : Leadless
❈ Please refer to the LIST OF PART NUMBERS when placing orders.
� Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request.
SURFACE MOUNT
TYPE TRIMMERS
C CO OP PA AL L E ELE LECT CTR RO ON NI IC CS S
ST-3
SURFACE MOUNT TYPE TRIMMERS
� LIST OF PART NUMBERS
A 10 Ω A 20 Ω 50 Ω 100 Ω 200 Ω 500 Ω 1 kΩ 2 kΩ 3 kΩ
Form of packaging
Adjustment Shape of
5 kΩ 10 kΩ 20 kΩ 30 kΩ 50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ
position terminal
Taping (reel) Bulk packaging
Fig.1
A (Leadless) A : Semi-standard
ST-3TA ST-3A
Top adjustment
❈ The above part numbers are all available with the respective combination of
Pieces in package 1000 pcs./reel 100 pcs./pack (Fig. 1).
❈ Verify the above part numbers when placing orders.
❈ Taping version must be purchased in reel units.
� MECHANICAL CHARACTERISTICS
� ELECTRICAL CHARACTERISTICS
250 ° (1 turn)
10 Ω ~ 1 MΩ Mechanical angle
Nominal resistance range
5 mN·m {51 gf·cm} maximum
Operating torque
± 20 %
Total resistance tolerance
20 mN·m {204 gf·cm} minimum
Stop strength
0.125 W (70 °C) 0 W (125 °C)
Power ratings
100 cycles [∆R/R ≤ _ ± (2 Ω +3 %)]
Rotational life
Resistance law Linear law
5 N {0.51 kgf} minimum
Thrust to rotor
Maximum input voltage DC200 V or power rating, whichever is smaller
Solderability 235 °C, 2 s
100 mA or power rating, whichever is smaller
Maximum wiper current
Shear (Adhesion) 5 N {0.51 kgf} 10 s
Width 90 mm, bend 3 mm,
210 ° (1 turn)
Effective electrical angle
Substrate bending
5 s, 1 time
Ω Pull-off strength 5 N {0.51 kgf} 10 s
End resistance 1 % or 2 , whichever is greater
{ } : Reference only
1 % or 3 Ω, whichever is greater
C.R.V.
� ENVIRONMENTAL CHARACTERISTICS
−55 ~ +125 °C
Operating temp. range
10 Ω ~ 50 Ω : ± 250 ppm/°C maximum
Test item Test conditions Specifications
Temp. coefficient
100 Ω ~ 1 MΩ : ± 100 ppm/°C maximum
−65 ~ +125 °C ≤ _
[∆R/R 2 %]
Thermal shock
≤
(0.5 h), 5 cycles [S.S. _ 1 %]
1000 MΩ minimum (DC500 V)
Insulation resistance
−10 ~ +65 °C (80 ~ 98 %RH),
≤
[∆R/R _ 2 %]
Humidity
10 cycles, 240 h
AC500 V, 60 s
Dielectric strength
2
981 m/s , 6 ms
Shock
6 directions for 3 times each
[∆R/R ≤ _ 1 %]
Net weight Approx. 0.05 g (ST-3A)
Amplitude of 1.52 mm or Acceleration
≤ _
[S.S. 1 %]
2
Vibration of 196 m/s , 10~2000 Hz, 3 directions,
12 times each
70 °C, 0.125 W [∆R/R ≤ _ 3 %]
Load life
≤ _
1000 h [S.S. 1 %]
≤
[∆R/R _ 2 %]
−55 °C, 2 h
Low temp. operation
≤ _
[S.S. 2 %]
≤
[∆R/R _ 3 %]
125 °C, 250 h
High temp. exposure
≤ _
[S.S. 2 %]
No leaks
85 °C, 60 s
Immersion seal
(No continuous bubbles)
260 °C, 10 s or
∆R/R ≤ _ 1 %]
[
Soldering heat
215 °C, 35 s
∆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.
SURFACE MOUNT
TYPE TRIMMERS
C CO OP PA AL L E ELE LECT CTR RO ON NI IC CS S
ST-3
SURFACE MOUNT TYPE TRIMMERS
� MAXIMUM INPUT RATINGS � RECOMMENDED P.C.B. PAD
OUTLINE DIMENSIONS
Nominal resistance
Maximum input Maximum wiper
Resistance code
values (Ω) voltage (V) current (mA)
(Unit : mm)
� ST-3A
A 10 11 1.00 100
A 20 21 1.58 79.1
1.8
1.6
50 51 2.50 50.0
100 12 3.53 35.4
200 22 5.00 25.0
500 52 7.91 15.8
1 k 13 11.2 11.2
2 k 23 15.8 7.91
0
0
3 k 33 19.4 6.45
5 k 53 25.0 5.00
10 k 14 35.4 3.54
20 k 24 50.0 2.50
30 k 34 61.2 2.04
50 k 54 79.1 1.58
1.2 0.8 1.2
100 k 15 112 1.12
1.2 0.8 1.2
3.2
200 k 25 158 0.79
500 k 55 200 0.40
3.2
Reflow soldering
1 M 16 200 0.20
Flow soldering
Note) The zero point is the center of mounting.
A : Semi-standard
� OUTLINE DIMENSIONS Unless otherwise specified, tolerance : ± 0.3
(Unit : mm)
1 3
� ST-3A
CW rotation
Top adjustment
2
❈ Note the terminal position.
0.4W × 1.5L × 0.5D
2 Production date code
1.8 Solder-plated
1 digit (Location reversed every 2 years)
3.2
2 1 1
1
3
Resistance code
2 digits
� Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request.
R1.4
3.5
1.7
1.2 1 0.9 1.5
4.6
2.1
2.1 1 1 1.6
5.7
SURFACE MOUNT
TYPE TRIMMERS
C CO OP PA AL L E ELE LECT CTR RO ON NI IC CS S
ST-3
SURFACE MOUNT TYPE TRIMMERS
� PACKAGING SPECIFICATIONS
� Taping version is packaged in 1000 pcs. per reel.
Orders will be accepted for units of 1000 pcs., i.e., 1000,
Maximum number of consecutive missing pieces=2
2000, 3000 pcs., etc.
Leader length and reel dimension are shown in the
� Taping version is boxed with 5 reels (5000 pcs.).
diagrams below.
� EMBOSSED TAPE DIMENSIONS � REEL DIMENSIONS
(Unit: mm)
+2
8.4 0
Empty Filled Empty
21±0.8
2±0.5
End Head
13±0.2
40 mm min. 20 pitches min.
Leader
Direction of feed
400 mm min.
178±2
14.4 max.
� Reel & embossed tape materials � Test method for peeling strength of seal tape
Embossed tape: Plastic
Reel: Paper
Seal cover tape
Peel direction
165°~180°
� Embossed tape pull strength
(300 mm/min)
9.8 N {1kgf} minimum
� Peeling strength of seal tape Direction of feed
0.098~0.69 N {10~70gf}
{ } : Reference only Carrier tape
� ST-3TA
4±0.1
4±0.1 2±0.05 Installation example (ST–3A)
0.2±0.1
2.4
Direction of feed
� Unit of bulk in vinyl bag packaging is 100 pcs. per pack.
� Boxing of bulk in vinyl bags is performed with 500 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.
φ 1.55
0
+0.1
SURFACE MOUNT
TYPE TRIMMERS
3.5±0.05 1.75±0.1
8
60 min.
Manufacturers
What they say about us
FANTASTIC RESOURCE
One of our top priorities is maintaining our business with precision, and we are constantly looking for affiliates that can help us achieve our goal. With the aid of GID Industrial, our obsolete product management has never been more efficient. They have been a great resource to our company, and have quickly become a go-to supplier on our list!
Bucher Emhart Glass
EXCELLENT SERVICE
With our strict fundamentals and high expectations, we were surprised when we came across GID Industrial and their competitive pricing. When we approached them with our issue, they were incredibly confident in being able to provide us with a seamless solution at the best price for us. GID Industrial quickly understood our needs and provided us with excellent service, as well as fully tested product to ensure what we received would be the right fit for our company.
Fuji
HARD TO FIND A BETTER PROVIDER
Our company provides services to aid in the manufacture of technological products, such as semiconductors and flat panel displays, and often searching for distributors of obsolete product we require can waste time and money. Finding GID Industrial proved to be a great asset to our company, with cost effective solutions and superior knowledge on all of their materials, it’d be hard to find a better provider of obsolete or hard to find products.
Applied Materials
CONSISTENTLY DELIVERS QUALITY SOLUTIONS
Over the years, the equipment used in our company becomes discontinued, but they’re still of great use to us and our customers. Once these products are no longer available through the manufacturer, finding a reliable, quick supplier is a necessity, and luckily for us, GID Industrial has provided the most trustworthy, quality solutions to our obsolete component needs.
Nidec Vamco
TERRIFIC RESOURCE
This company has been a terrific help to us (I work for Trican Well Service) in sourcing the Micron Ram Memory we needed for our Siemens computers. Great service! And great pricing! I know when the product is shipping and when it will arrive, all the way through the ordering process.
Trican Well Service
GO TO SOURCE
When I can't find an obsolete part, I first call GID and they'll come up with my parts every time. Great customer service and follow up as well. Scott emails me from time to time to touch base and see if we're having trouble finding something.....which is often with our 25 yr old equipment.
ConAgra Foods