Trimmer potentiometer SM-31
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●To buy this product, please go to the following Online Web stores.
Surface Mount Cermet Trimmers
FeaturesFeatures
- Fine adjustment is possible
- Automatic mounting is possible (Taping)
- Reflow soldering is possible
- Sealed construction (Washable)
- Resin material is UL Recognized 94V-0
- In this series, chemSHERPA-AI downloads are available,
which can be used for REACH-SVHC surveys, etc. - 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 | 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 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 ≦ 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/s2, 10~2000 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〉
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Maximum Input Ratings
| Nominal resistance values(Ω) | Resistance code | Maximum 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-3 | 1 | T | W | 500Ω | (501) |
|---|---|---|---|---|---|
| Series name |
Electrical turn
1：5 turns
Blank：11 turns
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Form of packaging
T: Taping (Reel)
Blank: Bulk in plastic bag
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Product shape (Shape of terminal)
A: J-hook (Side adjustment） B: Gull wing(Side adjustment） W: J-hook(Top adjustment） |
Resistance value |
Resistance code |
| 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.For the resistance value symbol, please refer to the maximum input rating table above.
Click here for the same type of 11 turns SM-3 series.List of Part Numbers
Downloads of chemSHERPA (e.g. for REACH-SVHC surveys) are available below. *Need to log in to download. [chemSHERPA-AI latest ver. 2.09.00]
| Part number | Electrical turns | Adjustment position | Shape of terminal | Packaging quantity | REACH-SVHC | CAD |
|---|---|---|---|---|---|---|
| SM-31TW | 5 turns | Top adjustment | J-hook | 500 pcs./reel | ||
| SM-31W | 5 turns | Top adjustment | J-hook | 50 pcs./pack | ||
| SM-31TA | 5 turns | Side adjustment | J-hook | 500 pcs./reel | ||
| SM-31A | 5 turns | Side adjustment | J-hook | 50 pcs./pack | ||
| SM-31TB | 5 turns | Side adjustment | Gull wing | 500 pcs./reel | ||
| SM-31B | 5 turns | Side adjustment | Gull wing | 50 pcs./pack |
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Taping specification is not sold separately and must be purchased in reel units.
Recommended P.C.B. Pad Outline Dimensions
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Outline Dimensions
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Environmental Data
- ●The above contents and descriptions are subject to change without notice.
