A Bimetal Thermostat Manufacturer Shaping the Future

Asahi Keiki Co., Ltd.
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Product

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US-638

  • Splash-proof type
  • Flat type
  • Compact flat type
  • Flat type

Snapper, Snap-action

Features
Slim design, resin-sealed construction
Uses
Seat heaters, fuel cells, medical devices, surveillance cameras, etc.
Register
CMJ (Voluntary Registration System for Electrical Equipment Parts and Materials) Registered Products, Environmentally Friendly Parts / RoHS-Compliant Products

Product photos

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  • US-638
  • US-638
  • US-638

Thermostat Specifications

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Electrical Rating (Resistive Load) AC 125V MAX.8A(Min.200mA)
AC 250V MAX.4A(Min.200mA)
DC 12V MAX.8A(Min.200mA)
DC 24V MAX.4A(Min.200mA)
Temperature Setting Range 30 ~ 50℃ 51 ~ 100℃
Temperature Setting Tolerance (Standard)
Please contact us for ±3℃ setting.
±4/±5 ±5/±6
Differential (Standard) 10 ~ 20℃ 20℃
Circuit Resistance (Initial Value) 70mΩ max.
(varies depending on lead wire length)
Insulation Resistance 100MΩ min. (with DC500V megohmmeter)
Dielectric Strength AC1500V / 1 min.
Heat Resistance 120℃ (excluding lead wire)
Cold Resistance -20℃
Switching Endurance 10,000 cycles or more (at rated load)

Please contact us separately regarding specifications that exceed these.

Thermostat Model Code

US-638

1 2 3 4 5 6 7

1Contact Material

A : Ag alloy contact

2Contact Type

X : "OFF" when temperature rises

3Case Type

A : Standard type, thickness 5.1mm

4Potting Agent Type

C : Epoxy resin D : Hot melt

5Lead Wire Type

E : Heat-resistant lead-free vinyl wire (0.5mm², black, length 70mm) (Potting agent: Epoxy resin)
F : Heat-resistant lead-free vinyl wire (0.75mm², black, length 70mm)
G : Heat-resistant automotive wire (0.5mm², black, length 70mm) (Potting agent: Hot melt)
H : Single unit specification [Including special lead wire and dimensions]

6Special Specification

TT : Temperature tolerance, other special specifications

7Category

None : Automotive product
S : Consumer product
Model Examples
  • US-638AXADF

    Hot-melt-filled, 0.75 sq black heat-resistant vinyl electrical wire, 70 mm

  • US-638AXADG

    Hot-melt-filled, 0.5 sq black heat-resistant automotive wire, 70 mm

Thermostat Dimensions

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Please feel free to contact us with any questions about our products.

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