SKU: SENS-3563
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Generic KSD302 Ceramic Temperature Controlled Switch Thermostat - 150°C NC, 250V 10A

₹54.00 (Inclusive of all taxes)
Out of Stock

The Generic KSD302 is a normally closed (NC) ceramic thermal switch designed for precise, fixed-point temperature control at 150°C. It provides a reliable, electromechanical cut-off for circuits up to 250V AC/DC and 10A, suitable for integration into appliances, power supplies, and industrial control systems.

Features

  • Fixed 150°C (±5°C) snap-action bimetallic thermostat with Normally Closed (NC) contact.
  • Rated for high-power switching: 250V AC/DC at 10A maximum current.
  • Durable ceramic housing providing excellent electrical insulation and thermal stability.
  • Compact and lightweight design (approx. 3g) for space-constrained installations.
  • Simple two-wire connection for fail-safe over-temperature protection.

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a robust ceramic body. It operates on a snap-action principle: when the ambient temperature reaches its calibrated set point of 150°C, the internal bimetallic disc deforms, mechanically opening the normally closed (NC) contacts to break the circuit. This provides a reliable, non-resettable (until cooled) form of over-temperature protection.

Its ceramic construction offers superior dielectric strength and resistance to arcing, making it suitable for direct switching of mains-voltage loads. The device is designed for surface mounting near heat sources in applications like electric heaters, transformers, motor protection, and coffee makers, where a precise thermal cut-off is required.

Key Features

  • Fixed Calibration: Precisely calibrated to trip at 150°C (±5°C typical tolerance).
  • High-Current Switching: Robust contacts capable of handling up to 10A at 250V AC/DC.
  • Ceramic Insulation: Housing provides excellent electrical isolation and withstands high temperatures without degradation.
  • Normally Closed Configuration: Circuit is closed under normal conditions, opening upon over-temperature for fail-safe operation.
  • Long Mechanical Life: Snap-action mechanism ensures quick, clean contact separation for extended operational lifespan.
  • Compact Form Factor: Minimal footprint and low profile for easy integration into existing assemblies.

Applications

  • Over-temperature protection in AC/DC power supplies and battery chargers.
  • Thermal cut-off safety in small household appliances (e.g., coffee makers, kettles, hair dryers).
  • Motor winding and transformer overload protection in industrial equipment.
  • Temperature control in heating elements and cartridge heaters.
  • Thermal management in power electronics and LED lighting drivers.

Technical Specifications

Model NumberKSD302
Switch TypeBimetallic Thermostat (Normally Closed - NC)
Set Point (Trip) Temperature150 °C
Rated Voltage250V AC/DC
Rated Current10A
Contact ConfigurationSPST-NC (Single Pole, Single Throw - Normally Closed)
Housing MaterialCeramic
Approx. Weight3 g

Frequently Asked Questions

What is the trip temperature and tolerance of the KSD302 thermostat?

The KSD302 is factory-calibrated to trip (open its normally closed contacts) at 150°C. Typical manufacturing tolerance is ±5°C, meaning the actual trip point will be between 145°C and 155°C. It will automatically reset and close the circuit once the temperature cools below the trip point.

What is the maximum voltage and current this switch can handle?

This thermostat is rated for a maximum switching voltage of 250 Volts AC or DC and a maximum current of 10 Amps. Do not exceed these ratings, as doing so may cause contact welding, failure to open, or arcing, which presents a safety hazard.

How do I wire this Normally Closed (NC) thermostat?

The KSD302 has two terminals. In a typical safety circuit, you wire it in series with the load (e.g., a heating element) and the power source. Under normal temperatures (<150°C), the circuit is complete. If over-temperature occurs, the internal contacts open, breaking the circuit to the load and removing power.

Is this thermostat resettable, and what is its mounting requirement?

Yes, it is automatically resettable. Once the temperature falls below the trip point, the bimetallic disc cools and returns to its original shape, closing the contacts again. For accurate operation, you must mount the thermostat's metal sensing surface in good thermal contact with the heat source you intend to monitor.

Package Includes

  • 1 x KSD302 Ceramic Temperature Controlled Switch Thermostat

Additional Information

Weight 0.03 kg
Dimensions 9 × 3 × 6 cm