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Generic KSD301 150°C NC Temperature Control Switch Thermostat - Bakelite, 250V 10A

₹67.00 (Inclusive of all taxes)
Out of Stock

The Generic KSD301 is a normally closed (NC) bimetallic thermostat switch rated for 150°C operation, designed for direct temperature control in heating appliances, power tools, and industrial equipment. It features a bakelite housing, 250V AC/DC rating, and a 10A switching capacity for reliable, non-electronic thermal protection.

Features

  • Bimetallic snap-action thermostat with a fixed 150°C (±5°C typical) trip point.
  • Normally Closed (NC) contact configuration opens on temperature rise for heating system safety.
  • Rated for 250V AC/DC and 10A resistive load, suitable for direct control of heating elements.
  • Durable bakelite housing provides electrical insulation and thermal stability.
  • Compact, screw-terminal design for easy integration into appliances and control panels.

Out of stock

Description

The KSD301 is a mechanical, fixed-temperature thermostat utilizing a bimetallic disc snap-action mechanism. When the ambient temperature reaches its calibrated set point of 150°C, the disc snaps and physically opens the normally closed (NC) electrical contacts, breaking the circuit. This provides a fail-safe, non-electronic method of over-temperature protection without requiring external power or complex circuitry.

Its robust bakelite construction ensures high electrical insulation and resistance to thermal deformation. The device is designed for direct series connection with the load, making it ideal for integration into coffee makers, soldering irons, power transformers, motor windings, and other equipment where reliable thermal cutoff is critical. The switch resets automatically once the temperature cools below the trip point.

Key Features

  • Fixed 150°C activation temperature with precise bimetallic snap-action mechanism.
  • Normally Closed (NC) contact configuration for fail-safe circuit interruption.
  • High-current capacity: 10A at 250V AC/DC for direct load switching.
  • Durable, flame-retardant bakelite housing for electrical safety and thermal stability.
  • Compact, lightweight design with screw terminals for straightforward installation.
  • Automatic reset function upon cooling below the trip temperature.
  • Wide operating voltage compatibility for both AC and DC applications.
  • Optimized performance-to-cost ratio for mass-produced appliance integration.

Applications

  • Over-temperature protection in electric water heaters, coffee makers, and kitchen appliances.
  • Thermal cutoff for motor and transformer winding protection in industrial equipment.
  • Temperature control in soldering stations, glue guns, and heating tools.
  • Safety interlock in battery chargers and power supply units.
  • Thermal regulation in incubators, terrariums, and simple environmental chambers.

Technical Specifications

Model NumberKSD301
Switch TypeNormally Closed (NC), Bimetallic Thermostat
Set Point (Trip Temperature)150°C
Contact Rating10A @ 250V AC/DC (Resistive)
Housing MaterialBakelite
Contact Configuration1-Pole, Normally Closed (NC)
Reset TypeAutomatic (upon cooling)
Terminal TypeScrew Terminals
Approximate Weight3 g

Frequently Asked Questions

What is the trip temperature of this KSD301 thermostat, and is it adjustable?

The KSD301 has a fixed, non-adjustable trip temperature of 150°C. It is a mechanical bimetallic thermostat calibrated at the factory. The switch will open (breaking the NC circuit) when the sensing surface reaches this temperature and will reset automatically once it cools sufficiently below the set point.

How should I wire this Normally Closed (NC) thermostat into my circuit?

Wire the thermostat in series with the load (e.g., a heating element) and the power source. In its normal state, the closed contacts allow current to flow. When the ambient temperature reaches 150°C, the contacts open, breaking the circuit and stopping power to the load. Ensure connections are secure on the screw terminals and that the thermostat's metal sensing face is in good thermal contact with the heat source.

What is the maximum electrical load this switch can handle?

This thermostat is rated for 10 Amps at 250 Volts, AC or DC. This rating is typically for resistive loads like heating elements. For inductive loads (motors, transformers), derating or using an external relay is recommended to prevent contact arcing and premature wear. Do not exceed these ratings.

Package Includes

  • 1 x Bakelite KSD301 150°C Normally Closed Temperature Control Switch Thermostat

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm