SKU: SENS-3605
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Generic KSD301 135°C NC Thermostat Switch - Bakelite, 250V 10A

₹31.00 (Inclusive of all taxes)
Out of Stock

The Generic KSD301 is a normally-open (NC) bimetallic thermostat switch rated for 250V/10A, featuring a 135°C fixed trip point and a durable Bakelite housing. This snap-action thermal switch is designed for direct integration into heating circuits, appliance safety cut-offs, and industrial temperature control applications.

Features

  • Fixed 135°C (±5°C) normally-open (NO) bimetallic snap-action switch
  • High-current rating: 10A at 250V AC for direct load switching
  • Durable Bakelite (phenolic) housing for electrical insulation and heat resistance
  • Compact and lightweight design for easy integration into appliances and control panels
  • Reliable mechanical operation with no external power required

Out of stock

Description

The KSD301 is a bimetallic disc thermostat that operates on a purely mechanical principle. When the ambient temperature reaches its calibrated set point (135°C), the bimetallic disc snaps, physically opening or closing the electrical contacts. In this Normally Open (NO) configuration, the circuit is open at room temperature and closes upon reaching the trip temperature, making it suitable for safety cut-off or alarm functions.

Constructed with a Bakelite body, the switch provides excellent electrical insulation and thermal stability up to its operating limits. Its robust design ensures reliable performance in environments with vibration or thermal cycling, commonly found in electric kettles, coffee makers, transformers, and industrial heating equipment where over-temperature protection is critical.

Key Features

  • Bimetallic snap-action mechanism for precise and reliable temperature actuation
  • High-voltage and current handling capability for direct switching without relays
  • Phenolic (Bakelite) housing ensures high dielectric strength and flame retardancy
  • Fixed calibration point eliminates the need for user adjustment, ensuring consistent performance
  • Compact form factor and screw terminal connections for straightforward installation
  • Mechanical operation provides fail-safe functionality independent of external power

Applications

  • Over-temperature safety cut-off in electric water heaters, kettles, and coffee makers
  • Thermal protection for power transformers, motors, and battery charging systems
  • Temperature control in industrial process heaters, soldering stations, and packaging equipment
  • Appliance safety compliance and thermal runaway prevention in consumer electronics
  • Simple thermostat function in incubators, terrariums, and DIY heating projects

Technical Specifications

Model NumberKSD301
Switch TypeNormally Open (NO) / Temperature Activated Close
Trip Temperature135°C
Rated Voltage250V AC
Rated Current10A
Housing MaterialBakelite (Phenolic)
Contact ConfigurationSPST (Single-Pole, Single-Throw)
Operating Temperature RangeUp to 80°C (ambient)
Weight (approx.)3 g

Frequently Asked Questions

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

The KSD301 is factory-calibrated to trip (close its contacts) at 135°C. Typical bimetallic thermostats have an operational tolerance of approximately ±5°C. The switch will reset (open contacts) once the temperature cools below the trip point by a defined differential, usually around 10-15°C.

Can this switch directly control a 10A heating element?

Yes. Rated for 10A at 250V AC, this switch is designed for direct switching of resistive loads like heating elements within its specified limits. Ensure your load's inrush current does not exceed the rating. For inductive loads (motors, transformers), derating or using an intermediate relay is recommended for longevity.

How do I wire this normally-open (NO) thermostat?

In its NO configuration, the circuit is open at normal temperature. Wire it in series with the load (e.g., heater) and power source. When the sensed temperature reaches 135°C, the internal bimetallic disc snaps to close the contacts, completing the circuit to activate the load or trigger an alarm, depending on your system design.

What is the maximum ambient temperature for the switch body?

The Bakelite housing and internal mechanism are rated for continuous operation in ambient temperatures up to 80°C. Exceeding this ambient temperature, even if the sensing point is cooler, can damage the housing or affect the calibration of the bimetallic element.

Package Includes

  • 1 x KSD301 135°C Normally Open Thermostat Switch

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm