KSD301 Ceramic Normally Closed (NC) Temperature Control Switch Thermostat - 70°C, 250V 16A
KSD301 Ceramic Normally Closed (NC) Temperature Control Switch Thermostat - 70°C, 250V 16A - Image 2
SKU: SENS-3580
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KSD301 Ceramic Normally Closed (NC) Temperature Control Switch Thermostat - 70°C, 250V 16A

₹54.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a ceramic-bodied, normally closed (NC) temperature control switch rated for 250V AC and 16A, designed to open its contacts at a fixed 70°C setpoint. This robust thermal protection device is suitable for integration into appliances, power supplies, and heating equipment requiring reliable over-temperature cutoff.

Features

  • Fixed 70°C Normally Closed (NC) snap-action thermal switch
  • High-current 16A rating at 250V AC for direct load control
  • Durable ceramic housing for electrical insulation and thermal stability
  • Compact and mechanically simple design for easy mounting
  • Reliable bimetallic disc actuator for precise temperature response

Out of stock

Description

The KSD301 is a bimetallic disc thermostat housed in a ceramic body, providing reliable over-temperature protection by mechanically opening its normally closed contacts when the sensing surface reaches its calibrated 70°C trip point. This action interrupts power to the connected circuit, safeguarding equipment from thermal damage.

Its ceramic construction offers excellent electrical insulation and resistance to thermal cycling, making it suitable for direct integration into mains-voltage applications like heaters, transformers, motors, and power converters. The switch resets automatically once the temperature cools below its hysteresis point, restoring circuit continuity.

Key Features

  • Fixed Calibration: Precisely set to trip at 70°C (±5°C typical) for consistent thermal protection.
  • High Current Capacity: Rated for 16A at 250V AC, enabling direct switching of significant loads without an external relay.
  • Ceramic Encapsulation: Provides high dielectric strength, flame resistance, and long-term stability under thermal stress.
  • Normally Closed Operation: Contacts are closed under normal conditions, opening only upon over-temperature detection.
  • Snap-Action Mechanism: Bimetallic disc ensures quick, positive contact separation to minimize arcing and wear.
  • Compact & Mountable: Small form factor with mounting holes for secure installation on heatsinks or enclosures.
  • Wide Compatibility: Suitable for AC mains applications in consumer appliances, industrial controls, and HVAC systems.

Applications

  • Over-temperature protection in electric water heaters, coffee makers, and kitchen appliances.
  • Thermal cutoff for power transformers, battery chargers, and switching power supplies.
  • Safety interlock in motor winding protection and HVAC fan control circuits.
  • Temperature regulation in incubators, soldering equipment, and laboratory heating devices.

Technical Specifications

Model NumberKSD301
Switch TypeNormally Closed (NC), Bimetallic Thermostat
Setpoint Temperature70°C
Rated Voltage250V AC
Rated Current16A
Contact ConfigurationSPST (Single-Pole, Single-Throw) NC
Housing MaterialCeramic
Operating PrincipleBimetallic Disc Snap-Action
Approximate Weight3 g

Frequently Asked Questions

What is the trip temperature and reset hysteresis of the KSD301 switch?

The KSD301 is factory-calibrated to open its normally closed contacts at a fixed setpoint of 70°C. It features a bimetallic snap-action mechanism with a typical hysteresis of approximately 5-10°C, meaning the contacts will re-close once the temperature cools to around 60-65°C, restoring circuit continuity automatically.

Can this switch control DC loads or only AC?

While primarily rated for 250V AC operation, the KSD301 can typically interrupt DC loads, but the current rating may need significant derating due to arc suppression challenges. For reliable DC switching, consult the manufacturer's DC rating specifications or use an intermediate relay for high-current DC applications.

How should I mount the KSD301 for proper temperature sensing?

For accurate response, mount the switch with its metal sensing disc in direct, firm thermal contact with the surface or component you wish to monitor, using the provided mounting holes. Ensure good thermal conductivity and avoid insulating materials between the sensor and the target. The ceramic body provides electrical isolation from the mounting surface.

Package Includes

  • 1 x KSD301 Ceramic Temperature Control Switch (70°C, NC, 250V 16A)

Additional Information

Weight 0.03 kg
Dimensions 9 × 6 × 3 cm

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