SKU: SENS-3541
📋 GST Invoice Available

Generic KSD302 Ceramic Temperature Control Switch - Normally Closed (NC), 105°C, 250V 16A

₹16.00 (Inclusive of all taxes)
Out of Stock

The KSD302 is a normally closed (NC) ceramic-bodied thermal switch designed to open a circuit at 105°C, rated for 250V AC and 16A loads. It provides reliable, non-adjustable over-temperature protection for a wide range of electrical appliances and heating elements.

Features

  • Normally Closed (NC) snap-action switch opens at 105°C (±5°C typical)
  • High-current ceramic housing rated for 250V AC / 16A resistive loads
  • Fixed, factory-calibrated temperature setpoint for reliable protection
  • Compact and durable ceramic body for thermal stability and electrical insulation
  • SPST (Single-Pole, Single-Throw) configuration for simple series wiring

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a robust ceramic package. When the ambient temperature reaches its calibrated setpoint of 105°C, the internal bimetallic disc snaps, mechanically opening the normally closed contacts to break the circuit. This provides a failsafe, automatic cut-off for overheating protection.

Its ceramic construction offers excellent electrical insulation and thermal stability, making it suitable for direct mounting on hot surfaces like heating elements, motors, or transformers. The switch resets automatically once the temperature cools below its reset point, typically a few degrees lower than the trip temperature.

Key Features

  • Fixed Temperature Actuation: Factory-set to open at 105°C (±5°C tolerance) for consistent performance.
  • High-Power Switching Capacity: Ceramic housing and contacts rated for 250V AC and 16A, suitable for direct control of heating elements.
  • Robust Ceramic Enclosure: Provides superior electrical insulation, heat resistance, and mechanical durability compared to plastic housings.
  • Snap-Action Mechanism: Bimetallic disc ensures quick, positive contact separation to minimize arcing and extend contact life.
  • Automatic Reset: Contacts re-close once temperature drops below the reset point, allowing for cyclic operation.
  • SPST Normally Closed Configuration: Simplifies wiring by placing the switch in series with the load for protection.

Applications

  • Over-temperature protection for electric water heaters, kettles, and coffee makers.
  • Thermal cut-off safety switch in transformers, power supplies, and motor windings.
  • Temperature regulation in soldering irons, heating pads, and cartridge heaters.
  • Safety interlock in appliances like hair dryers, space heaters, and grills.

Technical Specifications

Model / Part NumberKSD302
Switch TypeNormally Closed (NC), SPST
Actuation Temperature105°C
Voltage Rating250V AC
Current Rating16A (Resistive)
Housing MaterialCeramic
Contact ConfigurationSingle-Pole, Single-Throw (SPST)
Action TypeSnap-action, Automatic Reset
Terminal TypeQuick-connect spade or solder lug (varies)

Frequently Asked Questions

What is the switching logic of the KSD302 thermostat?

The KSD302 is a Normally Closed (NC) switch. At room temperature, the circuit between its two terminals is closed (conducting). When the temperature at the sensor reaches or exceeds its calibrated 105°C setpoint, the internal bimetallic disc snaps and mechanically opens the circuit, stopping current flow.

What is the maximum electrical load this switch can handle?

This switch is rated for a maximum of 250 Volts AC and 16 Amperes of current, typically for resistive loads like heating elements. It is crucial not to exceed these ratings to ensure safe operation and prevent contact welding or failure.

Can I adjust the trip temperature of this switch?

No, the KSD302 features a fixed, factory-calibrated actuation temperature of 105°C. It is not user-adjustable. For an adjustable setpoint, you would require a different model with a separate temperature sensor and electronic controller.

How do I wire this thermostat into my circuit?

Wire the KSD302 in series with the load (e.g., heating element) and the power source. As an NC switch, it acts as a protective device: when closed, power flows to the load; when it opens at 105°C, it breaks the circuit to cut power. Ensure good thermal contact between the switch's ceramic body and the surface you wish to monitor.

Package Includes

  • 1 x KSD302 Ceramic Temperature Control Switch

Additional Information

Weight 0.02 kg
Dimensions 11 × 7 × 2 cm