SKU: SENS-3534
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Generic Ceramics KSD302 50°C NC Temperature Control Switch Thermostat - 250V 16A

₹67.00 (Inclusive of all taxes)
Out of Stock

The Ceramics KSD302 is a normally closed (NC) thermal switch designed to open at 50°C, providing reliable over-temperature protection for appliances and industrial equipment. It features a ceramic housing for electrical insulation and durability, rated for 250V AC and 16A loads.

Features

  • Normally Closed (NC) snap-action switch opens at 50°C (±5°C typical)
  • High-current rating of 16A at 250V AC for direct load control
  • Ceramic housing ensures high electrical insulation and thermal stability
  • Fixed temperature setting for fail-safe over-temperature protection
  • Compact and robust design for integration into appliances and control panels

Out of stock

Description

The KSD302 is a bimetallic disc thermostat, a robust and cost-effective solution for temperature control and safety cutoff. When the ambient temperature reaches its calibrated setpoint of 50°C, the internal bimetallic disc snaps, mechanically opening the normally closed contacts to break the circuit. This action provides a reliable, non-resettable (unless temperature drops) method of protecting equipment from overheating.

Its ceramic body offers excellent dielectric strength and resistance to thermal shock, making it suitable for high-temperature environments near heating elements, motors, or power supplies. The switch is designed for direct series connection with the load, eliminating the need for additional control circuitry in many applications.

Key Features

  • Fixed Temperature Protection: Pre-calibrated to trip at 50°C, providing a simple, maintenance-free safety cutoff.
  • High Load Capacity: Handles up to 16A at 250V AC, suitable for controlling heaters, motors, and transformers directly.
  • Ceramic Construction: The housing provides superior electrical isolation, flame resistance, and long-term stability under thermal cycling.
  • Normally Closed Operation: Circuit is closed under normal conditions, opening only upon over-temperature, ensuring fail-safe operation.
  • Snap-Action Mechanism: Provides a quick, positive break of the electrical contacts to prevent arcing and ensure reliable switching.
  • Compact Form Factor: Small dimensions facilitate easy mounting on heat sinks, enclosures, or within appliance chassis.

Applications

  • Over-temperature protection in electric water heaters, coffee makers, and kitchen appliances.
  • Thermal cutoff safety for power supplies, battery chargers, and transformer windings.
  • Temperature control in incubators, terrarium heaters, and agricultural warming mats.
  • Motor overload protection in fans, pumps, and small industrial machinery.
  • Safety interlock in soldering iron stations and other hand tools with heating elements.

Technical Specifications

Model / Part NumberKSD302
Switch TypeNormally Closed (NC)
Trip Temperature50°C
Rated Voltage250V AC
Rated Current16A
Contact ConfigurationSPST-NC (Single Pole, Single Throw - Normally Closed)
Housing MaterialCeramic
Contact MaterialSilver Alloy
Mechanical Life>10,000 cycles
Approximate Dimensions (L x W x H)12 x 7 x 2 cm
Approximate Weight0.02 kg

Frequently Asked Questions

What does Normally Closed (NC) mean for this thermostat?

Normally Closed (NC) means the electrical contacts inside the KSD302 are closed, allowing current to flow, at temperatures below its 50°C setpoint. When the surrounding temperature reaches 50°C, the bimetallic disc snaps and physically opens the contacts, breaking the circuit to stop the connected device or trigger an alarm. It automatically resets and closes again once the temperature cools sufficiently below the trip point.

Can this switch control a 16A heater directly, or do I need a relay?

Yes, the KSD302 is rated to switch 16A at 250V AC directly. It can be wired in series with the live wire of your heater load, acting as both sensor and switch. No external relay is required for loads within its 16A/250V rating. Ensure all wiring connections are secure and rated for the current to prevent overheating at the terminals.

How accurate is the 50°C trip temperature, and is it adjustable?

The trip temperature is factory-set and not adjustable. Typical accuracy for this type of bimetallic thermostat is within ±3°C to ±5°C of the stated 50°C setpoint. The exact trip point can vary slightly due to mounting pressure, thermal mass, and air flow. For critical precision control, a separate digital sensor and controller is recommended.

What is the advantage of the ceramic housing material?

The ceramic housing provides excellent electrical insulation (high dielectric strength), which is crucial for safely switching 250V AC. It is also highly resistant to heat, flame, and thermal shock, ensuring the switch's internal mechanism remains stable and reliable even when mounted directly on hot surfaces or in environments with rapid temperature changes.

Package Includes

  • 1 x Ceramic KSD302 50°C NC Temperature Control Switch

Additional Information

Weight 0.02 kg
Dimensions 12 × 7 × 2 cm