A Bimetal Thermostat Manufacturer Shaping the Future

Asahi Keiki Co., Ltd.
Product photos

Product

Product photos

US-643

  • High-temperature type
  • Manual reset type
  • Round disc

Snapper, Snap-action

Features
High-Temperature-Rated 1/2 General-Purpose Manual Reset Type, Compact High-Capacity (Type A), for Low Current (Type K)

Product photos

Click the image to view a larger version

Thermostat Specifications

Click here to download the catalog

Electrical Rating (Resistive Load) A type : AC125V MAX.15A AC250V MAX.10A (MIN.200mA)
K type : DC30V MAX.1A(MIN.DC5V 1mA)
Ⅰ.Temperature Setting Range
Ⅱ.Temperature Setting Tolerance (Standard)
Ⅰ.Temperature Setting Range
Single-point temperature selection from 40 to 280℃
Ⅱ.Temperature Setting Tolerance (Standard)
±4~7℃
Circuit Resistance (Initial Value) 50mΩ max.
Insulation Resistance 100MΩ min. (with DC500V megohmmeter)
Dielectric Strength A type : AC1500V / 1 min.
K type : AC1200V / 1 min.
Heat Resistance 280℃
Cold Resistance -20℃
Switching Endurance 6,000 cycles or more (at rated load)

Please contact us separately regarding specifications that exceed these.

Thermostat Model Code

US-643

12345

1Contact Material

A : Ag alloy contact K : Au crossbar contact

2Contact Type

X : "OFF" when temperature rises

3Terminal Angle

R : Horizontal terminal T : Vertical terminal

4Terminal Type

L : Positive lock F250 series compatible (Size: 6.35×0.8 Material: Brass, Sn-plated) M : Positive lock F187 series compatible (Size: 4.75×0.5 Material: Brass, Sn-plated) S : For soldering

5Cover Material / Holder Type

QO : Aluminum, Without holder QL : Aluminum, Free surface type (Mounting: 24.5mm) KO : Aluminum, Recessed type (Depth: 5.0mm, 24.5mm) AS : Stainless steel, Surface type (Mounting: 24mm) IO : Stainless steel, Recessed type (Depth: 4.6mm, 24.5mm) JO : Stainless steel, Recessed type (Depth: 5.2mm, 24.5mm) QD : Aluminum, Surface type (Mounting: 30mm)

Thermostat Dimensions

Click the image to view a larger version

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

Click here to contact us

Product index