SKU: SENS-3533
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Generic KSD302 Ceramic Thermostat Switch - Normally Closed (NC), 70°C, 250V 16A

₹67.00 (Inclusive of all taxes)
Out of Stock

The KSD302 is a ceramic-bodied, snap-action thermal switch designed for reliable temperature control in appliances and industrial equipment. It operates as a Normally Closed (NC) switch, opening at 70°C to interrupt circuits rated up to 250V AC and 16A.

Features

  • Ceramic housing for high thermal conductivity and electrical insulation
  • Normally Closed (NC) snap-action switch opens at 70°C (±5°C typical)
  • Rated for 250V AC / 16A, suitable for direct control of heating elements and motors
  • Compact and robust design for embedded installation in appliances
  • Simple two-wire connection for easy integration into control circuits

Out of stock

Description

The KSD302 is a bimetallic disc thermostat housed in a durable ceramic body. The ceramic material provides excellent thermal transfer from the monitored surface to the internal bimetallic element, ensuring accurate and responsive switching at the calibrated setpoint of 70°C. It also offers high dielectric strength and flame resistance for safe operation in demanding environments.

This switch functions as a safety or control device, automatically breaking the electrical circuit when the local temperature reaches its actuation point. The snap-action mechanism ensures a clean, rapid break to prevent arcing and extend contact life under its 16A load rating. It resets automatically once the temperature drops below the setpoint, making it ideal for cycling applications like heaters, coffee makers, or power supplies.

Key Features

  • Precision bimetallic snap-disc actuator for reliable temperature response
  • High-grade ceramic body ensures optimal heat conduction and electrical isolation
  • Rugged construction suitable for vibration-prone appliance environments
  • SPST Normally Closed (NC) contact configuration for fail-safe circuit design
  • Direct high-current switching capability eliminates need for a relay in many applications
  • Wide operating temperature range for the housing ensures long-term stability
  • Optimized performance-to-cost ratio for volume OEM integration

Applications

  • Over-temperature protection in AC/DC power supplies and battery chargers
  • Temperature cycling control in small kitchen appliances (coffee makers, kettles, warmers)
  • Thermal cutoff safety for motors, transformers, and solenoids in industrial equipment
  • Heat regulation in incubators, terrariums, and other environmental chambers
  • Safety interlock in heating elements for soldering irons or hot plates

Technical Specifications

Model NumberKSD302
Switch TypeNormally Closed (NC), Snap-Action
Setpoint (Trip) Temperature70°C
Voltage Rating250V AC
Current Rating16A
Contact ConfigurationSPST (Single Pole, Single Throw)
Housing MaterialCeramic
Terminal TypeQuick-Connect / Blade (0.25")
Reset TypeAutomatic (on temperature drop)
Approximate Tolerance±5°C

Frequently Asked Questions

What is the reset behavior of this KSD302 thermostat?

The KSD302 features an automatic reset. Once the temperature at the switch's sensing surface drops approximately 5-10°C below the 70°C setpoint, the bimetallic disc will snap back to its original shape, closing the contacts again. This allows for automatic cycling in temperature control applications without manual intervention.

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

Yes, the switch is rated for 250V AC and 16A, which is more than sufficient for most 120V AC heating loads. Ensure the inrush and steady-state current of your heater does not exceed 16A. For inductive loads like motors, derating may be advisable to account for arc suppression.

How should I mount the thermostat for accurate temperature sensing?

For optimal performance, mount the ceramic body directly against the surface or component whose temperature you need to monitor, using a thermal compound if possible. Ensure good mechanical contact and consider the thermal mass of the mounting surface. Avoid mounting in areas with significant airflow that could cool the switch and cause inaccurate readings.

Package Includes

  • 1 x KSD302 Ceramic Thermostat Switch

Additional Information

Weight 0.02 kg
Dimensions 11 × 7 × 2 cm