SKU: SENS-3531
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Generic Ceramics KSD302 90°C NC Temperature Control Switch Thermostat - 250V 16A

₹59.00 (Inclusive of all taxes)
Out of Stock

The Ceramics KSD302 is a 90°C (194°F) normally closed (NC) thermal switch designed for reliable temperature control in AC mains-powered appliances and equipment. It provides a simple, robust, and cost-effective solution for over-temperature protection and regulation.

Features

  • Normally Closed (NC) snap-action switch opens at 90°C (194°F) setpoint.
  • Rated for 16A at 250V AC, suitable for direct control of heating elements, motors, and compressors.
  • Ceramic housing ensures high electrical insulation and thermal stability.
  • Simple two-wire connection for easy integration into existing control circuits.
  • Compact and durable mechanical design for long service life.

Out of stock

Description

The KSD302 is a bimetallic disc thermostat, a classic and reliable technology for temperature control. When the ambient temperature reaches its calibrated setpoint of 90°C, the internal bimetallic disc snaps, mechanically opening the normally closed electrical contacts to interrupt the circuit. This provides fail-safe protection against overheating.

Its ceramic body offers excellent dielectric strength and resistance to thermal shock, making it suitable for applications where electrical isolation and durability are paramount. The switch resets automatically once the temperature drops sufficiently below the setpoint, allowing for cyclical operation without manual intervention.

Key Features

  • Precision-calibrated bimetallic snap-action mechanism for accurate 90°C trip point.
  • High-current switching capability (16A @ 250V AC) for direct load control.
  • Ceramic construction provides superior electrical insulation and flame retardancy.
  • Normally Closed (NC) configuration enables fail-safe circuit interruption on over-temperature.
  • Automatic reset function for continuous, unattended cycling.
  • Robust design resistant to vibration and suitable for demanding environments.
  • Simple two-terminal screw or solder connection for straightforward installation.

Applications

  • Over-temperature protection in electric water heaters, kettles, and coffee makers.
  • Temperature regulation in soldering irons, glue guns, and small heating appliances.
  • Thermal cutoff safety in power supplies, transformers, and motor windings.
  • Control circuit for incubators, terrariums, and other temperature-controlled enclosures.
  • Safety interlock in industrial equipment requiring a fixed high-temperature limit.

Technical Specifications

Model NumberKSD302
Switch TypeNormally Closed (NC)
Trip / Setpoint Temperature90°C (194°F)
Current Rating16A
Voltage Rating250V AC
Contact ConfigurationSPST-NC
Housing MaterialCeramic
Reset TypeAutomatic
Actuation TypeBimetallic Snap Disc

Frequently Asked Questions

What is the exact trip temperature and tolerance of this KSD302 switch?

The switch is calibrated to open its Normally Closed contacts at a nominal temperature of 90°C (194°F). Typical bimetallic thermostats of this type have an operational tolerance of approximately ±5°C. The exact reset temperature is several degrees lower than the trip point to prevent rapid cycling.

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

Yes. The voltage rating of 250V AC covers standard 120V and 240V mains applications. The 16A current rating is the maximum continuous load. Ensure the power consumption of your appliance (in Amps) is below this 16A limit for safe and reliable operation.

How do I wire this Normally Closed (NC) thermostat?

Wire the two terminals in series with the load (e.g., heating element) and the AC power source. In its normal cool state, the circuit is closed, allowing current to flow. When the sensed temperature reaches 90°C, the contacts open, breaking the circuit to stop the load. It acts as an automatic, resettable thermal fuse.

Is this thermostat suitable for controlling a DC load?

It is primarily designed and rated for AC loads. Using it for DC switching, especially at similar current levels, is not recommended. Arcing on DC can be more severe and may weld the contacts or reduce the switch's lifespan. For DC applications, use a DC-rated relay or solid-state switch controlled by this thermostat.

Package Includes

  • 1 x Ceramics KSD302 90°C NC Temperature Control Switch Thermostat

Additional Information

Weight 0.03 kg
Dimensions 12 × 8 × 2 cm