KSD105 Electric Pressure Cooker Thermostat Switch

Appliance Component · Temperature Control · KSD105 · Thermostat Switch

What Is the KSD105 Thermostat Switch?

The KSD105 is a snap-action bimetallic thermostat switch commonly used in electric pressure cookers, rice cookers, and similar heating appliances. It opens the electrical circuit when the set temperature is reached and automatically resets when the appliance cools down — providing both temperature regulation and over-temperature safety protection in household and commercial cooking appliances.

In short: A KSD105 snap-action thermostat switch for electric pressure cookers — regulates cooking temperature and provides overheat protection by automatically opening the heating circuit at the rated trip temperature.

Key Features

1. Bimetallic Snap-Action Mechanism

What it means: A bonded bimetallic disc snaps from concave to convex at a precise calibrated temperature, opening or closing electrical contacts.
Why it matters: The snap action provides clean, decisive switching with minimal arcing — unlike slow-make/slow-break thermostats that arc and weld contacts.
Result: Long contact life and reliable temperature control over thousands of cooking cycles.

2. Automatic Reset

What it means: When the appliance cools below the reset temperature, the bimetallic disc snaps back and the contacts re-close automatically.
Why it matters: The appliance can resume heating without manual reset — essential for the cyclic heating pattern of pressure cooking.
Result: Unattended cooking cycle completion with automatic temperature maintenance throughout the cooking duration.

3. Dual Function: Regulation + Safety

What it means: The same thermostat serves both as the primary temperature regulator and as the safety over-temperature cutoff.
Why it matters: If the primary control fails (e.g., stuck relay), the thermostat still opens at a safe upper temperature limit, preventing fire or appliance damage.
Result: Inherent safety redundancy in the appliance thermal protection system.

Key Specifications

Typical Applications

• Electric Pressure Cookers: Serving as the primary temperature control and safety cutoff in multi-function electric pressure cookers and multicookers.
• Rice Cookers: Switching from cook mode to warm mode when water is absorbed and temperature rises above boiling point.
• Electric Deep Fryers: Maintaining oil temperature within safe limits and providing overheat protection against thermostat failure.
• Portable Heating Appliances: Temperature limiting in electric hot plates, warming trays, and small household heating devices.

Frequently Asked Questions

"What is the trip temperature of this KSD105 thermostat?"

KSD105 thermostats are available in various temperature ratings — common values for pressure cookers range from 120 degrees Celsius to 180 degrees Celsius. The exact trip temperature is stamped on the thermostat body or marked on its packaging. Verify the rated temperature matches your appliance specification — installing a thermostat with the wrong trip point will cause under-cooking or over-temperature safety trips.

"How do I test if this thermostat is functioning correctly?"

Test with a multimeter in continuity mode: at room temperature, the contacts should be closed (continuity). Heat the thermostat sensing surface (carefully, with a heat gun or soldering iron at a safe distance) and observe that the contacts open (no continuity) at approximately the rated temperature. Allow to cool and verify the contacts re-close. If the thermostat stays open when cold, it has failed permanently open and must be replaced.

"Can I use this thermostat in a non-cooking application?"

While designed and calibrated for cooking appliance temperature ranges, the KSD series can be used in any application within its voltage, current, and temperature ratings where automatic-reset bimetallic temperature switching is suitable. Verify the electrical ratings (voltage, current, load type) are compatible with your application before use.

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