SKU: SENS-3603
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Generic KSD301 140°C Normally Open NC Temperature Control Switch Thermostat - Bakelite, 250V 10A

₹11.00 (Inclusive of all taxes)
Out of Stock

The Generic KSD301 is a bimetallic, snap-action temperature control switch (thermostat) rated for 250V AC and 10A. It features a normally open (NO) contact configuration and is preset to actuate at 140°C, making it suitable for direct integration into heating circuits for over-temperature protection in appliances and industrial equipment.

Features

  • Bimetallic snap-action thermostat with a fixed 140°C (±5°C) trip point.
  • Rated for high-power switching: 250V AC / 10A resistive load.
  • Normally Open (NO) contact configuration; closes on temperature rise.
  • Durable Bakelite housing providing electrical insulation and thermal stability.
  • Compact, screw-terminal design for easy integration into control panels and appliances.

Out of stock

Description

The KSD301 is a mechanical, temperature-activated safety switch utilizing a bimetallic disc element. As the ambient temperature reaches its calibrated set point (140°C), the disc snaps, physically closing the electrical contacts to complete a circuit or trigger an alarm. This simple, reliable design requires no external power, making it ideal for fail-safe protection.

Housed in robust Bakelite, the switch offers excellent electrical insulation and resistance to heat. Its screw terminals facilitate secure wiring connections for integration into heating elements, motors, transformers, or other equipment requiring automatic thermal cutoff to prevent damage from overheating.

Key Features

  • Fixed-Calibration Bimetallic Thermostat: Provides reliable, repeatable switching at the preset 140°C temperature threshold.
  • High-Current Switching Capacity: Handles up to 10A at 250V AC for direct control of heating loads.
  • Normally Open Configuration: Contacts remain open under normal conditions, closing upon overtemperature for alarm or shutdown circuits.
  • Robust Bakelite Enclosure: Ensures electrical safety, heat resistance, and mechanical durability in demanding environments.
  • Manual Reset Function: After tripping, the switch automatically resets once the temperature cools below the hysteresis point.
  • Optimized Performance-to-Cost Ratio: A simple, effective solution for essential thermal protection without complex electronics.

Applications

  • Over-temperature protection in electric water heaters, coffee makers, and small appliances.
  • Thermal cutoff safety for motors, transformers, and power supplies in industrial control cabinets.
  • Temperature monitoring and alarm triggering in HVAC systems and heating equipment.
  • Integrating into DIY projects requiring a simple, high-current thermal switch for safety.

Technical Specifications

Model NumberKSD301
Switch TypeBimetallic Temperature Control Switch (Thermostat)
Contact ConfigurationNormally Open (NO)
Set Point (Trip Temperature)140 °C
Rated Voltage250V AC
Rated Current10A
Housing MaterialBakelite
Terminal TypeScrew Terminals
Approximate Weight3 g

Frequently Asked Questions

What is the exact trip temperature and tolerance for this KSD301 switch?

This KSD301 model is calibrated to actuate (close its contacts) at 140°C. Typical bimetallic thermostats have an operating tolerance of approximately ±5°C, meaning the actual trip point may range from 135°C to 145°C depending on manufacturing variance and mounting conditions.

Can I use this switch to directly control a 120V AC heating element?

Yes. The switch is rated for 250V AC and 10A, which is more than sufficient for a 120V AC circuit. Ensure the current draw of your heating element does not exceed the 10A rating. The Normally Open (NO) configuration means the heater will be off until the temperature reaches 140°C and the contacts close.

How do I wire this thermostat and does it require external power?

This is a mechanically-actuated switch and requires no external power supply. Simply connect one screw terminal to your power source (e.g., Line) and the other terminal to the load (e.g., heater or alarm circuit). The switch will close the circuit when the sensed temperature reaches 140°C.

Is the switch action automatic reset or manual reset?

This type of bimetallic snap-action thermostat features an automatic reset. Once the temperature cools below the trip point (typically by 10-20°C due to hysteresis), the bimetallic disc will snap back to its original position, opening the contacts again until the next over-temperature event.

Package Includes

  • 1 x KSD301 Temperature Control Switch (140°C, NO)

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm