SKU: SENS-3565
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Generic KSD302 Ceramic Temperature Controlled Switch Thermostat - 140°C NC, 250V 10A

₹11.00 (Inclusive of all taxes)
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The Generic KSD302 is a normally closed (NC) ceramic thermal switch designed for precise, fixed-point temperature control at 140°C. It is rated for 250V AC/DC and 10A, making it suitable for direct integration into heating circuits, safety cut-offs, and appliance protection systems.

Features

  • Fixed 140°C normally closed (NC) thermal switch for automatic circuit interruption.
  • Ceramic housing for high electrical insulation and thermal stability.
  • Robust 250V AC/DC, 10A electrical rating for direct load switching.
  • Compact and durable mechanical design for reliable long-term operation.
  • Simple two-wire installation for integration into safety and control circuits.

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a ceramic enclosure. At its calibrated setpoint of 140°C, the internal bimetallic element snaps, mechanically opening the normally closed (NC) contacts to break the circuit, providing over-temperature protection. Upon cooling below the reset temperature, the contacts close again to restore power.

This design offers a reliable, maintenance-free solution for temperature monitoring without requiring external power or complex signal conditioning. The ceramic body ensures excellent dielectric strength and resistance to arcing, making it suitable for direct switching of resistive loads in appliances, transformers, and power supplies.

Key Features

  • Fixed Temperature Actuation: Precisely calibrated bimetallic switch triggers at 140°C (±5°C typical tolerance).
  • High-Current Switching: Capable of directly controlling loads up to 10A at 250V AC/DC.
  • Ceramic Insulation: Provides superior electrical isolation, arc resistance, and thermal endurance.
  • Normally Closed Configuration: Circuit is closed under normal conditions and opens upon over-temperature event.
  • Mechanical Reliability: No moving parts beyond the bimetallic disc, ensuring long operational life.
  • Compact Form Factor: Small footprint allows for installation in space-constrained applications.

Applications

  • Over-temperature protection in coffee makers, water heaters, and small kitchen appliances.
  • Thermal cut-off safety for power transformers, battery chargers, and power supplies.
  • Temperature control in soldering irons, 3D printer heated beds, and hobbyist electronics.
  • Safety interlock in motor windings, solenoids, and industrial heating elements.

Technical Specifications

Model NumberKSD302
Switch TypeNormally Closed (NC) Thermal Switch / Thermostat
Actuation Temperature140 °C
Rated Voltage250V AC/DC
Rated Current10A
Contact ConfigurationSPST-NC (Single Pole, Single Throw, Normally Closed)
Housing MaterialCeramic
Approximate Weight3 g

Frequently Asked Questions

What is the switching logic of the KSD302 thermostat?

The KSD302 is a normally closed (NC) switch. This means the electrical contacts are closed at temperatures below its 140°C setpoint, allowing current to flow. When the temperature rises to 140°C, the internal bimetallic disc snaps and mechanically opens the contacts, breaking the circuit to provide over-temperature protection.

What is the maximum electrical load this switch can handle?

This thermal switch is rated for a maximum of 10 Amperes at 250 Volts AC or DC. It is designed for direct switching of resistive loads, such as heating elements. For inductive loads (motors, solenoids), derating or the use of an external relay is recommended to handle inrush currents and arcing.

How do I install and wire the KSD302 thermostat?

Installation is straightforward. The switch has two terminals. Wire it in series with the load (e.g., heater) and power source. Ensure the ceramic body is in good thermal contact with the heat source you wish to monitor. Mount it securely using the provided bracket or adhesive, avoiding stress on the terminals. No external power is required for operation.

Package Includes

  • 1 x KSD302 Ceramic Temperature Controlled Switch Thermostat (140°C NC, 250V 10A)

Additional Information

Weight 0.03 kg
Dimensions 9 × 6 × 3 cm