SKU: SENS-3582
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KSD301 Ceramic Temperature Controlled Switch Thermostat - Normally Closed NC, 50°C, 250V 16A

₹54.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a ceramic-housed, normally closed (NC) thermal switch designed for precise temperature control up to 50°C in electrical circuits, rated for 250V AC and 16A loads. It provides a reliable, snap-action mechanical cutoff for applications requiring over-temperature protection.

Features

  • Ceramic housing for electrical insulation and thermal stability
  • Normally Closed (NC) contact opens at the set 50°C temperature
  • High current rating of 16A at 250V AC for robust load control
  • Fixed 50°C (±5°C typical) actuation temperature
  • Compact and durable mechanical thermostat design

Out of stock

Description

The KSD301 is a bimetallic disc-type thermostat, where a temperature-sensitive bimetal element mechanically opens or closes an electrical contact. At the calibrated setpoint of 50°C, the bimetal disc snaps, opening the normally closed contacts to break the circuit, providing fail-safe over-temperature protection.

Housed in a ceramic body, the switch offers excellent electrical isolation, flame resistance, and long-term stability under thermal cycling. This design is suited for integration into appliances, power supplies, transformers, and heating elements where a simple, reliable, and cost-effective thermal cutoff is required.

Key Features

  • Fixed temperature actuation at 50°C (±5°C typical tolerance)
  • Ceramic enclosure ensures high dielectric strength and heat resistance
  • Snap-action bimetallic mechanism for positive contact operation
  • SPST Normally Closed (NC) contact configuration
  • Rated for 250V AC / 16A resistive loads
  • Compact form factor for easy panel or surface mounting
  • Maintenance-free operation with no external power required

Applications

  • Over-temperature protection in AC/DC power supplies and battery chargers
  • Thermal cutoff for electric kettles, coffee makers, and small kitchen appliances
  • Motor and transformer winding temperature protection
  • Safety cutoff in soldering irons and heating pad controls
  • Temperature monitoring in electronic enclosures and control cabinets

Technical Specifications

Model NumberKSD301
Switch TypeTemperature Controlled Thermostat (Bimetallic)
Contact ConfigurationSPST, Normally Closed (NC)
Set Point (Actuation) Temperature50°C
Rated Voltage250V AC
Rated Current16A (Resistive)
Housing MaterialCeramic
Contact MaterialSilver Alloy
Operating Temperature Range-25°C to 150°C (Ambient)
Mechanical Life>10,000 cycles
Approximate Weight3 g

Frequently Asked Questions

What does Normally Closed (NC) mean for this thermostat?

Normally Closed (NC) means the electrical contacts inside the KSD301 are closed at room temperature, allowing current to flow. When the sensing temperature reaches the calibrated setpoint of 50°C, the bimetallic disc snaps and mechanically opens the contacts, breaking the circuit to stop current flow. This provides automatic, power-free over-temperature protection.

Can I use this KSD301 switch with DC voltage or for inductive loads?

The primary rating is for 250V AC resistive loads. For DC voltage or inductive loads (like motors, solenoids), the switching capability is significantly reduced due to arcing. It is recommended to consult the manufacturer's derating curves or use a relay for such loads. Always ensure your application's inrush and steady-state current do not exceed the 16A resistive rating.

How do I mount and wire the KSD301 thermostat?

Mount the ceramic body securely to the surface whose temperature you need to monitor, using thermal paste if necessary for better heat transfer. Wire the two terminals in series with the load you want to protect. Ensure good electrical connections and that the voltage and current of your circuit do not exceed the 250V AC / 16A rating. The switch operates automatically, requiring no external power or control signals.

Package Includes

  • 1 x KSD301 Ceramic Temperature Controlled Switch Thermostat (50°C, NC, 250V 16A)

Additional Information

Weight 0.03 kg
Dimensions 9 × 6 × 3 cm