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Trimmer potentiometer ST-7

●To buy this product, please go to the following Online Web stores.
To the Trimmer potentiometer “ST-7 series” page on the DigiKey online shop
To the Trimmer potentiometer “ST-7 series” page on the Chip1stop online shop
To the Trimmer potentiometer “ST-7 series” page on the Farnell online shop
To the Trimmer potentiometer “ST-7 series” page on the Mouser online shop

Surface Mount Cermet Trimmers (3 turns)

 

FeaturesFeatures
  • Fine adjustment is possible
  • Automatic mounting is possible (Taping)
  • Flow/reflow soldering is possible
  • Sealed construction (Washable)
  • In this series, material data sheets ideal for REACH-SVHC
    surveys etc. can be downloaded in chemSHERPA-AI format.
  • Download chemSHERPA-AI from the list of P/N below

Electrical Characteristics

Power ratings 0.25 W (70 °C) 0 W (125 °C)
Nominal resistance range 50 Ω ~ 1 MΩ
Resistance tolerance ± 20 %
Resistance law Linear law(B)
Maximum input voltage DC200 V or power rating, whichever is smaller
Maximum wiper current 100 mA or power rating, whichever is smaller
Effective electrical turn 2.5 turns
End resistance 1 % or 2 Ω , whichever is greater
C.R.V. 1 % or 3 Ω , whichever is greater
Operating temp. range −55 ~ 120 °C
Temp. coefficient 50 Ω : ± 250 10-6/°C maximum
100 Ω ~ 1 MΩ : ± 100 10-6/°C maximum
Insulation resistance 1000 MΩ minimum (DC500 V)
Dielectric strength AC600 V, 60 s
Net weight Approx. 0.25 g

Mechanical Characteristics

Mechanical turn 3 turns
Operating torque 5 mN•m {51 gf•cm} maximum
Mechanical stop Clutch action
Rotational life 100 cycles [ΔR/R ≦ ± (2 Ω +3 %)]
Thrust to shaft 5 N {0.51 kgf} minimum
Solderability 245 ± 3 °C, 2 ~ 3 s
Shear (Adhesion) 5 N {0.51 kgf} 10 s
Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time
Pull-off strength 5 N {0.51 kgf} 10 s
{ }:Reference only

Environmental Characteristics

Test itemTest conditionsSpecifications
Thermal shock -65~125 °C (0.5 h), 5 cycles [ΔR/R ≦ 2%]
[S.S. ≦ 1%]
Humidity -10~65 °C (Relative humidity 80~98%), 10 cycles, 240 h [ΔR/R ≦ 1%]
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/s210~2000 Hz, 3 directions, 12 times each [ΔR/R ≦ 1%]
[S.S. ≦ 1%]
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
  • 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
[ΔR/R ≦ 1%]
Δ R/R: Change in total resistance
S.S.: Setting stability
〈Reflow profile for soldering heat evaluation〉

Maximum Input Ratings

Nominal resistance values(Ω)Resistance codeMaximum input voltage (V)Maximum wiper current(mA)
50 500 3.53 70.7
100 101 5.00 50.0
200 201 7.07 35.4
500 501 11.2 22.4
1k 102 15.8 15.8
2k 202 22.4 11.2
5k 502 35.4 7.07
10k 103 50.0 5.00
20k 203 70.7 3.54
50k 503 112 2.24
100k 104 158 1.58
200k 204 200 1.00
500k 504 200 0.40
1M 105 200 0.20

Part Number Designation

ST-7ETW1 kΩ (102)

Series

Terminal pin

E: 
Sn (Lead-free)

Form of packaging

T: Taping (Reel)

Blank: Bulk in plastic bag

Terminal shape (Adjust Pos.)

A: J-hook (Top adjustment)

B: Gull wing (Top adjustment)

Resistance value (Resistance code)

 
Nominal resistance values 50Ω, 100Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 50kΩ, 100kΩ, 200kΩ, 500kΩ, 1MΩ
When ordering, please be sure to include the above nominal resistance value at the end of the part number in the table list below. For resistance code, please refer to the Maximum Input Ratings table in the previous section.

List of Part Numbers

 
 

 

 
 
CAD and chemSHERPA-AI (a material data sheet ideal for REACH surveys, etc. / version: 2.09.00) can be downloaded from the popup for each P/N in the table below. *Need to log in to download.
Part No.Shape of terminalAdjustment positionForm of packagingPieces in packageMaterial dataCAD
ST-7ETA J-hook Top adjustment Taping (reel) 500 pcs./reel
ST-7EA J-hook Top adjustment Plastic bag 50 pcs./pack
ST-7ETB Gull wing Top adjustment Taping (reel) 500 pcs./reel
ST-7EB Gull wing Top adjustment Plastic bag 50 pcs./pack

Recommended P.C.B. Pad Outline Dimensions

Outline Dimensions

※ The ST-7 series has a different terminal arrangement 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.)

Environmental Data

●The above contents and descriptions are subject to change without notice. 

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