SKU: SENS-3537
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Generic KSD302 Ceramic Temperature Controlled Switch Thermostat - 135°C NC, 250V 16A

₹12.00 (Inclusive of all taxes)
Out of Stock

The KSD302 is a normally closed (NC) bimetallic temperature switch with a fixed 135°C trip point, rated for 250V AC and 16A. This ceramic-housed thermostat is designed for direct integration into heating elements, appliances, and industrial equipment for reliable over-temperature protection.

Features

  • Fixed 135°C (±5°C) normally closed (NC) bimetallic snap-action switch.
  • High-current 16A rating at 250V AC for direct load switching.
  • Durable ceramic housing for electrical insulation and thermal stability.
  • Compact, screw-terminal design for easy integration into appliances.
  • Provides reliable, non-resettable over-temperature cutoff protection.

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a robust ceramic body. It operates on a simple mechanical principle: a bimetallic disc deflects at its calibrated temperature (135°C), causing the normally closed (NC) contacts to snap open, thereby interrupting the circuit. This action provides a failsafe, one-time-use over-temperature protection mechanism.

With a high current rating of 16A at 250V AC, this switch can directly control significant loads without requiring an external relay, making it ideal for integration into heating elements, coffee makers, water heaters, and other high-power appliances. The ceramic housing ensures excellent electrical isolation and withstands high ambient temperatures.

Key Features

  • Fixed Calibration: Precisely calibrated to trip at 135°C (±5°C typical) for consistent protection.
  • High-Current Capacity: Rated for 16A at 250V AC, enabling direct switching of heating loads.
  • Robust Ceramic Housing: Provides superior electrical insulation, thermal resistance, and mechanical durability.
  • Normally Closed Operation: Circuit is closed under normal conditions; opens upon overheating to cut power.
  • Snap-Action Mechanism: Bimetallic disc ensures quick, positive contact separation for reliable circuit interruption.
  • Compact & Mountable: Small form factor with mounting holes for secure installation in confined spaces.
  • Non-Resettable Design: Provides a one-time safety cutoff, requiring replacement after activation for guaranteed safety.

Applications

  • Over-temperature safety cutoff in electric water heaters and kettles.
  • Thermal protection for heating elements in coffee makers and appliances.
  • Temperature regulation in soldering irons and small industrial heaters.
  • Safety interlock in power supplies and battery chargers to prevent overheating.
  • Thermal cutoff in lighting fixtures and transformer enclosures.

Technical Specifications

Model NumberKSD302
Switch TypeNormally Closed (NC)
Trip Temperature135°C
Current Rating16A
Voltage Rating250V AC
Housing MaterialCeramic
Contact TypeBimetallic Snap-Action
Terminal TypeScrew Terminals
Reset TypeNon-Resettable (One-Time Use)
Approx. Dimensions (L x W x H)11 x 7 x 2 cm
Approx. Weight0.02 kg

Frequently Asked Questions

Is this KSD302 thermostat resettable after it trips?

No, the KSD302 is a non-resettable, one-time-use bimetallic thermostat. Once the internal temperature exceeds the calibrated 135°C point, the normally closed contacts snap open permanently to break the circuit. The unit must be replaced to restore protection.

What is the electrical rating and how should I wire this switch?

This switch is rated for 16 Amperes at 250 Volts AC. It features screw terminals for connection. Wire it in series with the load (e.g., a heating element) on the live (hot) wire. Ensure the circuit is de-energized before installation and that the switch is mounted securely, making good thermal contact with the monitored surface.

What does 'Normally Closed (NC)' mean for this temperature switch?

'Normally Closed' means the electrical contacts inside the switch are closed, allowing current to flow, when the ambient temperature is below the 135°C trip point. When the temperature rises to or above 135°C, the bimetallic disc deflects, causing the contacts to snap open and interrupt the circuit, providing over-temperature protection.

Can this switch be used for precise temperature control or regulation?

No, the KSD302 is not designed for precise regulation or cycling. It is a safety device with a fixed, non-adjustable trip point (135°C). Its primary function is to act as a one-time thermal fuse, providing a final over-temperature cutoff to prevent fire or damage, not for maintaining a set temperature.

Package Includes

  • 1 x KSD302 Ceramic Temperature Switch (135°C NC, 250V 16A)

Additional Information

Weight 0.02 kg
Dimensions 11 × 7 × 2 cm