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Trimmer potentiometer SM-3

●To buy this product, please go to the following Online Web stores.
To the Trimmer potentiometer “SM-3 series” page on the Digi-Key online shop
To the Trimmer potentiometer “SM-3 series” page on the Chip1stop online shop
To the Trimmer potentiometer “SM-3 series” page on the Farnell online shop
To the Trimmer potentiometer “SM-3 series” page on the Mouser online shop

Multiturn Surface Mount Cermet Trimmers (11 turns)

 

FeaturesFeatures
  • Multiturn type: 11 turns
  • Fine adjustment is available
  • Automatic mounting is available (Taping)
  • Reflow soldering is available
  • Sealed construction (Washable)
  • Resin material is UL Recognized 94V-0
  • 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 0.125 W (70 °C) 0 W (150 °C)
Nominal resistance range 50 Ω ~ 2 MΩ
Resistance tolerance ± 20 %
Resistance law Linear law (B)
Maximum input voltage 200 VDC or power rating, whichever is smaller
Maximum wiper current 100 mA or power rating, whichever is smaller
Effective electrical turn 11 turns (cf. SM-31: 5 turns)
End resistance 1 % or 3 Ω , whichever is greater
C.R.V. 3 % or 3 Ω , whichever is greater
Operating temp. range -65 ~ 150 °C
Temp. coefficient ±100 10-6/°C maximum
Insulation resistance 1000 MΩ minimum (500 VDC)
Dielectric strength 600 VAC, 60 s
Net weight Approx. 0.10 g

Mechanical Characteristics

Operating torque 5 mN·m {51 gf·cm} maximum
Mechanical stop Clutch action
Rotational life 200 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

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 ≦ 3%]
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, 0.125 W, 1000 h [ΔR/R ≦ 3 %] [S.S. ≦ 3 %]
Low temperature operation -65 °C, 2 h [ΔR/R ≦ 2%] [S.S. ≦ 2%]
High temperature exposure 150 °C, 250 h [ΔR/R ≦ 3%] [S.S. ≦ 2%]
Immersion seal 85 °C, 60 s No leaks
(No continuous bubbles)
Soldering heat 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 2.50 50.0
100 101 3.53 35.4
200 201 5.00 25.0
500 501 7.91 15.8
1k 102 11.2 11.2
2k 202 15.8 7.91
5k 502 25.0 5.00
10k 103 35.4 3.54
20k 203 50.0 2.50
50k 503 79.1 1.58
100k 104 112 1.12
200k 204 158 0.79
500k 504 200 0.40
1M 105 200 0.20
2M 205 200 0.10

Part Number Designation

SM-3TW500 Ω (501)

Series

Electrical turn

Blank: 11 turns

1: 5 turns

Form of packaging

T: Taping (Reel)

Blank: 

Bulk in

plastic bag

Terminal shape (Adjust Pos.)

W: J-hook (Top adjustment)

A: J-hook (Side adjustment)

B: Gull wing (Side adjustment)

Resistance value (Resistance code)

 
Nominal resistance values 50Ω, 100Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 50kΩ, 100kΩ, 200kΩ, 500kΩ, 1MΩ, 2MΩ
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.Electrical
turns
Adjustment
position
Shape of
terminal
Form of
packaging
Packaging
quantity
Material dataCAD
SM-3TW 11 turns Top adjustment J-hook Taping
(Reel)
500 pcs./reel
SM-3W 11 turns Top adjustment J-hook Plastic bag 50 pcs./pack
SM-3TA 11 turns Side adjustment J-hook Taping
(Reel)
500 pcs./reel
SM-3A 11 turns Side adjustment J-hook Plastic bag 50 pcs./pack
SM-3TB 11 turns Side adjustment Gull wing Taping
(Reel)
500 pcs./reel
SM-3B 11 turns Side adjustment Gull wing Plastic bag 50 pcs./pack
Taping specification is not sold separately and must be purchased in reel units.

Recommended P.C.B. Pad Outline Dimensions

Outline Dimensions

Unless otherwise specified, tolerance: ± 0.3 (Unit: mm)

Environmental Data

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

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