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Trimmer potentiometer SM-31

●To buy this product, please go to the following Online Web stores.
To the Trimmer potentiometer“SM-31 series” page on the DigiKey online shop
To the Trimmer potentiometer“SM-31 series” page on the RS online shop
To the Trimmer potentiometer“SM-31 series” page on the Chip One Stop online shop
To the Trimmer potentiometer“SM-31 series” page on the element14 online shop
To the Trimmer potentiometer“SM-31 series” page on the Mouser online shop

SURFACE MOUNT CERMET TRIMMERS

  • RoHS compliant
  • Fine adjustment is possible
  • Automatic mounting is possible (Taping)
  • Reflow soldering is possible
  • Sealed construction (Washable)

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 DC200 V or power rating, whichever is smaller
Maximum wiper current 100 mA or power rating, whichever is smaller
Effective electrical turn 11 turns (SM-3) / 5 turns (SM-31)
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 (DC500 V)
Dielectric strength AC600 V, 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 temp. operation −65 °C, 2 h [ΔR/R ≦ 2%]
[S.S. ≦ 2%]
High temp. 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-3TW500Ω(501)
Series name


Electrical turn
1:5 turns
Form of packaging
T: Taping (Reel)
Blank: Bulk in plastic bag

Product shape (Shape of terminal)
A:J-hook (Side adjustment)
B:Gull wing(Side adjustment)
W:J-hook (Top adjustment)

Resistance value


Resistance code


Click here for the same type of 11 turns SM-3 series.

LIST OF PART NUMBERS

Nominal resistance values 50Ω, 100Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 50kΩ, 100kΩ, 200kΩ, 500kΩ, 1MΩ, 2MΩ
  • The above part numbers are all available with the respective combination of <Nominal resistance values>
  • Verify the above part numbers when placing orders.
  • Taping specification is not sold separately and must be purchased in reel units.
PART NUMBERSElectrical turnAdjustment positionShape of terminalForm of packagingPieces in packageCAD
SM-31TW 5 Top adjustment J-hook Taping (Reel) 500 pcs./reel
SM-31W 5 Top adjustment J-hook Bulk in plastic bag 50 pcs./pack
SM-31A 5 Side adjustment J-hook Bulk in plastic bag 50 pcs./pack
SM-31TA 5 Side adjustment J-hook Taping (Reel) 500 pcs./reel
SM-31TB 5 Side adjustment Gull wing Taping (Reel) 500 pcs./reel
SM-31B 5 Side adjustment Gull wing Bulk in plastic bag 50 pcs./pack
Click here for the same type of 11 turns SM-3 series.

RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS

OUTLINE DIMENSIONS

Environmental Data

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

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