SKU: SENS-3564
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KSD302 Ceramic Normally Open NC Temperature Control Switch Thermostat - 140°C, 250V 10A

₹30.00 (Inclusive of all taxes)
Out of Stock

The KSD302 is a ceramic-housed, normally open (NC) thermal switch designed for reliable over-temperature protection in appliances and industrial controls. It operates at a fixed 140°C set point, handling up to 250V AC and 10A, making it suitable for direct integration into mains-powered heating circuits.

Features

  • Fixed 140°C (±5°C) snap-action bimetallic disc for precise thermal cutoff.
  • Rated for 250V AC / 10A resistive load, suitable for direct mains connection.
  • Ceramic housing provides excellent electrical insulation and thermal stability.
  • Normally Open (NO) contact configuration opens circuit upon temperature exceedance.
  • Compact and robust design for embedded installation in appliances and control panels.

Out of stock

Description

The KSD302 thermal switch utilizes a bimetallic disc mechanism housed within a high-grade ceramic body. When the ambient temperature reaches the calibrated set point of 140°C, the disc snaps, mechanically opening the normally closed contacts to break the circuit. This provides a fail-safe, non-resettable cut-off for over-temperature protection.

Its ceramic construction ensures high dielectric strength, flame resistance, and long-term stability under thermal cycling. The device is designed for direct series connection with heating elements, motors, or transformers in applications like coffee makers, soldering irons, transformers, and small industrial heaters, where precise thermal management is critical for safety.

Key Features

  • Precision bimetallic snap-action thermostat with fixed 140°C actuation.
  • High-current ceramic switch rated for 250V AC, 10A resistive loads.
  • Robust ceramic housing ensures electrical isolation and withstands high temperatures.
  • Normally Open (NO) configuration provides automatic circuit interruption on overheat.
  • Compact form factor (approx. 9 x 6 x 3 cm) for space-constrained installations.
  • Designed for reliable, maintenance-free operation in demanding environments.
  • High-value build for cost-effective integration into safety-critical circuits.

Applications

  • Over-temperature protection in small household appliances (e.g., coffee makers, kettles, hair dryers).
  • Thermal cutoff for soldering stations, glue guns, and other temperature-controlled tools.
  • Safety interlock in power transformers, battery chargers, and power supply units.
  • Temperature monitoring and control in industrial heating elements and process equipment.
  • Embedded thermal safety switch in automotive accessories and HVAC components.

Technical Specifications

Model NumberKSD302
TypeThermal Cutoff Switch / Thermostat
Contact ConfigurationNormally Open (NO)
Set Point Temperature140°C
Rated Voltage250V AC
Rated Current10A (Resistive)
Housing MaterialCeramic
Operating PrincipleBimetallic Snap Disc
Approx. Weight3 g

Frequently Asked Questions

What is the operating principle of the KSD302 thermal switch?

The KSD302 uses a bimetallic disc mechanism. At its calibrated set point of 140°C, the differential expansion of the two metals causes the disc to snap, mechanically opening the Normally Open (NO) contacts. This breaks the circuit, providing a one-time, non-resettable over-temperature cutoff for safety.

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

Yes, the KSD302 is rated for 250V AC, making it suitable for 120V AC applications. Ensure the current draw of your heating element does not exceed the 10A resistive rating. The switch should be wired in series with the load on the live (hot) wire to provide proper circuit interruption.

Is the KSD302 resettable after it trips?

No, the KSD302 is a non-resettable, one-shot thermal cutoff device. Once the internal bimetallic disc snaps at 140°C, the switch opens permanently and must be replaced to restore circuit functionality. This design ensures fail-safe protection in critical applications.

What are the key installation considerations for this thermostat?

For accurate sensing, the ceramic body must be in direct thermal contact with the heat source or surface being monitored. Secure it using appropriate mounting clips or thermal adhesive. Ensure wiring connections are tight and insulated, and respect the voltage (250V AC max) and current (10A max) ratings to prevent switch failure or fire hazard.

Package Includes

  • 1 x KSD302 Ceramic Temperature Control Switch Thermostat

Additional Information

Weight 0.003 kg
Dimensions 9 × 6 × 3 cm