SKU: SENS-3567
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Generic KSD301 Ceramic Temperature Controlled Switch Thermostat - Normally Closed NC, 135°C, 250V 10A

₹21.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a ceramic-bodied, normally closed (NC) thermal switch designed for reliable temperature control up to 135°C. It is rated for 250V AC/DC and 10A loads, making it suitable for direct integration into heating elements, appliances, and power control circuits.

Features

  • Ceramic housing for high thermal conductivity and electrical insulation.
  • Normally Closed (NC) contact configuration opens at the setpoint temperature (135°C).
  • Rated for 250V and 10A, suitable for direct switching of significant loads.
  • Compact and robust design for easy panel or surface mounting.
  • Bimetallic snap-action mechanism ensures precise and reliable switching.

Out of stock

Description

The KSD301 is a bimetallic disc thermostat housed in a durable ceramic package. The ceramic material provides excellent electrical isolation and efficiently transfers heat to the internal bimetallic element. At its calibrated setpoint of 135°C, the disc snaps, mechanically opening the normally closed contacts to interrupt the circuit.

This device functions as a one-shot, automatic reset thermal protector. Once the temperature falls below the reset point (typically a few degrees below the setpoint), the bimetallic disc returns to its original shape, closing the contacts to restore power. It is designed for integration into appliances, power supplies, battery packs, and heating equipment where over-temperature protection is critical.

Key Features

  • Ceramic housing ensures high dielectric strength and thermal durability.
  • Precision-calibrated bimetallic snap-action mechanism for accurate trip point.
  • High current-carrying capacity (10A) for direct load control.
  • Normally Closed (NC) configuration provides fail-safe open-circuit upon overheating.
  • Compact form factor with solder or quick-connect terminal options.
  • Automatic reset functionality eliminates need for manual intervention.
  • Wide voltage rating (250V AC/DC) for versatile application.

Applications

  • Over-temperature protection in electric water heaters, coffee makers, and small appliances.
  • Thermal cutoff for battery charging systems and power supply units.
  • Temperature control in soldering irons, heating pads, and cartridge heaters.
  • Safety interlock in motor windings and transformer cooling systems.
  • Thermal management in LED drivers and high-power electronic enclosures.

Technical Specifications

Model NumberKSD301
Housing MaterialCeramic
Contact ConfigurationNormally Closed (NC)
Trip / Setpoint Temperature135 °C
Rated Voltage250 V AC/DC
Rated Current10 A
Switch TypeBimetallic Snap-Action, Automatic Reset
Approximate Weight3 g

Frequently Asked Questions

What is the function of the Normally Closed (NC) contact in the KSD301?

The Normally Closed (NC) contacts are closed under normal, cool conditions, allowing current to flow through the circuit. When the surrounding temperature reaches the calibrated setpoint of 135°C, the internal bimetallic disc snaps and mechanically opens the contacts, breaking the circuit to stop current flow and provide over-temperature protection.

Can this switch handle both AC and DC voltages?

Yes, the KSD301 is rated for 250V AC/DC. However, for DC switching at the full 10A rating, special consideration for arc suppression may be needed, as DC arcs are harder to extinguish. For optimal longevity in DC applications, derating the current or using additional arc suppression circuits is recommended.

How do I install and wire the KSD301 thermostat?

Install the thermostat in direct thermal contact with the heat source requiring protection, using thermal paste if necessary for better conductivity. Wire it in series with the load (e.g., heating element) on the live or positive side of the circuit. Ensure the metal casing is not shorted to other components, as it may be electrically live. The device is typically mounted via its integral bracket or with a mounting clip.

Does the switch reset automatically after tripping?

Yes, the KSD301 features an automatic reset function. Once the temperature cools below the reset point (which is several degrees below the 135°C trip point), the bimetallic disc snaps back to its original position, closing the contacts again and restoring power to the circuit automatically without manual intervention.

Package Includes

  • 1 x KSD301 Ceramic Temperature Controlled Switch (135°C, NC, 250V 10A)

Additional Information

Weight 0.03 kg
Dimensions 9 × 3 × 6 cm