Trimmpotentiometer ST-7｜NIDEC COMPONENTS EUROPE GmbH

Trimmpotentiometer ST-7

ST-7

ST-7

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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 item	Test conditions	Specifications
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/s2, 10~2000 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 code	Maximum 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-7	E	T	W	1 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)

ST-7

1 kΩ (102)

Series

Terminal pin

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 terminal	Adjustment position	Form of packaging	Pieces in package	Material data	CAD
ST-7ETA	J-hook	Top adjustment	Taping (reel)	500 pcs./reel	chemSHERPA-AI (Ver.2.09.00)	2D / 3D CAD(Any Model)
ST-7EA	J-hook	Top adjustment	Plastic bag	50 pcs./pack	chemSHERPA-AI (Ver.2.09.00)	2D / 3D CAD(Any Model)
ST-7ETB	Gull wing	Top adjustment	Taping (reel)	500 pcs./reel	chemSHERPA-AI (Ver.2.09.00)	2D / 3D CAD(Any Model)
ST-7EB	Gull wing	Top adjustment	Plastic bag	50 pcs./pack	chemSHERPA-AI (Ver.2.09.00)	2D / 3D CAD(Any Model)

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.)