SKU: SENS-3601
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Generic KSD301 150°C Normally Open NC Temperature Switch Thermostat - Bakelite Housing, 250V 10A

₹20.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a bimetallic, normally open (NO) snap-action thermostat switch rated for 250V AC/DC and 10A loads. It provides reliable, fixed-temperature control at 150°C for heating systems, appliances, and industrial equipment, featuring a durable Bakelite housing for electrical insulation and thermal stability.

Features

  • Fixed 150°C (±5°C) bimetallic snap-action switch for precise thermal cutoff.
  • Rated for 250V AC/DC and 10A resistive loads, suitable for direct control of heaters and motors.
  • Normally Open (NO) contact configuration; closes circuit upon reaching setpoint temperature.
  • Bakelite (phenolic) housing ensures high electrical insulation and resistance to heat creep.
  • Compact, screw-terminal design for easy integration into control panels and appliance chassis.

Out of stock

Description

The KSD301 is a bimetallic disc thermostat that functions as a fixed-temperature, normally open thermal switch. When the ambient temperature reaches its calibrated setpoint of 150°C, the bimetallic disc snaps to close the electrical contacts, completing the circuit to activate a cooling fan, cut off a heater, or trigger an alarm. This mechanical action provides a reliable, latching response without requiring external power.

Encased in a Bakelite shell, the switch offers excellent dielectric strength and thermal resistance, preventing electrical leakage and material degradation under continuous high-temperature operation. Its simple two-wire interface with screw terminals allows for straightforward series installation into AC or DC power lines, making it a fundamental component for over-temperature protection in coffee makers, soldering stations, industrial ovens, and HVAC safety cutoffs.

Key Features

  • Bimetallic snap-disc mechanism ensures fast, positive contact action at the calibrated 150°C trip point.
  • High-current 10A rating allows direct switching of heating elements, motors, and solenoids without a relay.
  • Bakelite (phenolic resin) housing provides UL 94V-0 equivalent flame retardancy and arc resistance.
  • Normally Open (NO) configuration is ideal for fail-safe circuits that require activation upon overheating.
  • Compact and robust mechanical design supports long operational life with minimal contact wear.
  • Wide 250V AC/DC voltage compatibility for versatile integration into global power standards.
  • Fixed calibration eliminates the need for user adjustment, ensuring consistent factory-set performance.

Applications

  • Over-temperature safety cutoff in electric water heaters, coffee machines, and kitchen appliances.
  • Thermal protection for power transformers, motor windings, and industrial heating blankets.
  • Temperature control in soldering stations, 3D printer heated beds, and reflow oven safety loops.
  • HVAC system fan control or heater shutdown in ducting and furnace plenums.
  • Battery pack thermal management and cutoff in power tools and energy storage systems.

Technical Specifications

Model NumberKSD301
Switch TypeNormally Open (NO), Bimetallic Snap-Action
Setpoint Temperature150°C (typical tolerance ±5°C)
Rated Voltage250V AC/DC
Rated Current10A (Resistive Load)
Contact ConfigurationSPST (Single-Pole, Single-Throw) Normally Open
Housing MaterialBakelite (Phenolic Resin)
Terminal TypeScrew Terminals
Operating PrincipleMechanical Bimetallic Disc
Weight (approx.)3 g

Frequently Asked Questions

What does 'Normally Open (NO)' mean for this KSD301 thermostat?

The KSD301 is a Normally Open (NO) switch, meaning its electrical contacts are open at room temperature. When the sensing surface reaches its calibrated setpoint of 150°C, the internal bimetallic disc snaps to physically close the contacts, completing the circuit. This configuration is used to activate a cooling fan, sound an alarm, or cut power to a heater when an over-temperature condition occurs.

Can this thermostat switch both AC and DC loads?

Yes, the KSD301 is rated for 250V AC or DC at 10 amps resistive. This broad voltage rating makes it compatible with most common line-voltage applications worldwide. Ensure the connected load (heater, motor, solenoid) does not exceed the 10A current rating to prevent contact welding and premature failure.

How do I install and wire the KSD301 thermostat?

Installation requires mechanically securing the thermostat's metal sensing face directly to the heat source (e.g., a heater tank or motor housing) using the provided mounting hole for optimal thermal transfer. Electrically, wire it in series with the load (e.g., a heater) using the two screw terminals. The switch will close the circuit when temperature reaches 150°C, allowing current to flow to the load.

Is the 150°C setpoint adjustable?

No, the KSD301 features a fixed, factory-calibrated bimetallic disc set to trip at 150°C (with a typical tolerance of ±5°C). The setpoint is not user-adjustable. For variable temperature control, you would need a separate electronic thermostat module with a potentiometer or digital interface.

Package Includes

  • 1 x KSD301 150°C Normally Open Temperature Switch Thermostat

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm