SKU: SENS-3610
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Generic KSD301 120°C NC Thermostat Switch - Bakelite Housing, 250V 10A

₹16.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a normally closed (NC) bimetallic snap-action thermostat switch rated for 250V AC and 10A, designed to open its contacts at a fixed 120°C temperature. Its Bakelite housing provides electrical insulation and thermal stability for integration into appliances, heaters, and industrial control panels.

Features

  • Fixed 120°C (±5°C typical) snap-action bimetallic disc switch
  • Normally Closed (NC) contact configuration opens on temperature rise
  • Rated for 250V AC / 10A resistive loads for direct power control
  • Bakelite (phenolic) housing for electrical insulation and heat resistance
  • Compact, screw-terminal design for easy panel or surface mounting

Out of stock

Description

The KSD301 is a fixed-temperature, thermally actuated switch utilizing a bimetallic disc mechanism. When the ambient temperature reaches its calibrated set point of 120°C, the disc snaps to physically open the normally closed (NC) electrical contacts, breaking the circuit. This provides a reliable, non-resettable over-temperature cutoff without requiring external power.

Constructed with a Bakelite body, the switch offers excellent electrical insulation and resistance to thermal deformation. Its robust design is suited for direct integration into heating elements, motors, transformers, and other equipment requiring over-temperature protection or simple on/off thermal control within industrial, commercial, and appliance applications.

Key Features

  • Fixed bimetallic snap-action mechanism for precise trip point at 120°C
  • Normally Closed (NC) contact configuration opens upon temperature rise
  • High-current capacity: 10A at 250V AC for direct load switching
  • Bakelite housing ensures electrical safety and thermal stability up to rated temperature
  • Compact, screw-terminal design facilitates straightforward wiring and mounting
  • Mechanical operation requires no external power supply for core function
  • Durable construction suitable for integration in appliances and industrial control panels

Applications

  • Over-temperature protection cutoff for coffee makers, water heaters, and small appliances
  • Thermal safety switch in power supplies, transformers, and motor windings
  • Temperature control in incubators, soldering stations, and heating elements
  • Safety interlock in industrial control panels and electrical enclosures

Technical Specifications

Model NumberKSD301
Switch TypeNormally Closed (NC), Snap-Action Bimetallic Thermostat
Trip Temperature120°C (Fixed)
Contact Rating10A @ 250V AC (Resistive)
Housing MaterialBakelite (Phenolic)
Contact ConfigurationSPST-NC (Single Pole, Single Throw, Normally Closed)
MountingScrew Terminal, Surface/Panel Mount
Approx. Weight3 g

Frequently Asked Questions

What is the operating principle of the KSD301 thermostat?

The KSD301 uses a bimetallic disc that physically bends as temperature increases. At its calibrated set point of 120°C, the disc snaps to instantly open the normally closed (NC) electrical contacts, breaking the circuit. This is a purely mechanical, non-resettable action requiring no external power.

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

Yes, provided the heater's current draw does not exceed the 10A rating. The switch contacts are rated for 250V AC / 10A resistive loads, making it suitable for directly switching line voltage to heating elements, motors, or fans in appliances and industrial equipment.

Is the 120°C trip temperature adjustable?

No, the KSD301 is a fixed-temperature thermostat. The bimetallic disc is factory-calibrated to snap open at 120°C (with a typical tolerance of ±5°C). For adjustable temperature control, a different model with a variable setpoint or an electronic controller would be required.

Package Includes

  • 1 x KSD301 Normally Closed Thermostat Switch

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm