SKU: SENS-3539
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Generic Ceramics KSD302 120°C NC Thermostat Switch - 250V 16A

₹20.00 (Inclusive of all taxes)
Out of Stock

The Ceramics KSD302 is a 120°C normally closed (NC) thermal cut-off switch rated for 250V AC and 16A loads, designed for automatic temperature control and overheat protection in appliances and industrial equipment.

Features

  • 120°C (±5°C) snap-action bimetallic thermostat with Normally Closed (NC) contact.
  • Rated for 250V AC / 16A resistive loads, suitable for direct mains power control.
  • Ceramic housing provides electrical insulation and thermal stability up to high temperatures.
  • Compact, screw-terminal design for easy integration into appliance wiring.
  • Functions as a non-resettable, one-time safety cut-off or a resettable temperature controller.

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a durable ceramic package. When the ambient temperature reaches its calibrated setpoint of 120°C, the internal bimetallic disc snaps, mechanically opening the normally closed contacts to break the electrical circuit. This provides fail-safe overheat protection.

Its ceramic construction ensures excellent dielectric strength and resistance to tracking, making it suitable for direct line-voltage applications. The switch is designed for integration into heating elements, motors, transformers, and other equipment where precise thermal cutoff is required.

Key Features

  • Bimetallic snap-action mechanism for reliable, repeatable switching.
  • Ceramic body offers high dielectric strength and flame-retardant properties.
  • Normally Closed (NC) configuration provides fail-safe open-circuit upon over-temperature.
  • Rugged screw terminals for secure, high-current wire connections.
  • Compact form factor (approx. 11 x 7 x 2 cm) for space-constrained installations.
  • Designed for direct 250V AC mains operation, eliminating need for a control relay.

Applications

  • Over-temperature protection for electric water heaters, kettles, and coffee makers.
  • Thermal cutoff safety device in power transformers, motors, and solenoids.
  • Temperature regulation in soldering irons, glue guns, and small heating appliances.
  • Safety interlock in battery chargers and power supplies to prevent overheating.
  • Industrial equipment thermal monitoring and failsafe shutdown circuits.

Technical Specifications

Model NumberKSD302
Switch TypeNormally Closed (NC)
Setpoint Temperature120°C (±5°C typical)
Voltage Rating250V AC
Current Rating16A (Resistive)
Contact ConfigurationSPST-NC (Single Pole, Single Throw, Normally Closed)
Housing MaterialCeramic
Terminal TypeScrew Terminals
Approximate Dimensions (L x W x H)11 x 7 x 2 cm
Approximate Weight0.02 kg

Frequently Asked Questions

Is this KSD302 thermostat switch resettable?

Yes, the KSD302 uses a bimetallic snap-disc mechanism, which is inherently resettable. Once the temperature cools below its reset point (typically 10-20°C below the 120°C setpoint), the contacts will automatically close again, restoring the circuit.

What is the difference between Normally Closed (NC) and Normally Open (NO) in a thermostat?

A Normally Closed (NC) thermostat, like this KSD302, conducts electricity when cool and opens the circuit upon reaching its set temperature (120°C). This is used for safety cutoff. A Normally Open (NO) thermostat does the opposite, closing to complete a circuit when hot, which is typically used for activating cooling fans or alarms.

Can this switch be used to control a 120V AC circuit?

Yes, the 250V AC rating is a maximum. It is perfectly safe to use this switch on lower voltage AC circuits like 120V or 240V, provided the current does not exceed its 16A rating. The voltage rating indicates its insulation and arc-quenching capability.

How should I wire the KSD302 thermostat?

Connect the load (e.g., heating element) in series with one of the screw terminals. Connect the AC power line to the other terminal. The switch will break this connection when its sensing area reaches 120°C. Ensure the thermostat body is in good thermal contact with the component you wish to monitor.

Package Includes

  • 1 x Ceramics KSD302 120°C NC Thermostat Switch

Additional Information

Weight 0.02 kg
Dimensions 11 × 7 × 2 cm