SKU: SENS-3599
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KSD301 50°C Normally Open NC Temperature Control Switch Thermostat - Bakelite, 250V 10A

₹32.00 (Inclusive of all taxes)
Out of Stock

The KSD301 is a bimetallic, normally-open (NO) snap-action thermostat rated for 250V AC/DC and 10A, featuring a fixed 50°C (122°F) trip point. Its Bakelite housing provides electrical insulation and thermal stability, making it suitable for direct integration into heating elements, appliances, and industrial control panels for over-temperature protection.

Features

  • Fixed 50°C (122°F) trip temperature with bimetallic snap-action mechanism
  • Rated for 250V AC/DC and 10A switching capacity (resistive load)
  • Bakelite housing ensures high electrical insulation and thermal resistance
  • Normally Open (NO) contact configuration opens on temperature rise
  • Compact, screw-terminal design for easy integration into control circuits

Out of stock

Description

The KSD301 is a fixed-temperature, bimetallic disc thermostat. When the ambient temperature reaches its calibrated set point of 50°C, the internal bimetallic disc snaps, mechanically opening the normally closed (NC) contacts to break the circuit. This action provides a reliable, non-resettable cut-off for over-temperature protection.

Constructed with a Bakelite shell, the switch offers excellent dielectric strength and heat resistance, preventing tracking and ensuring long-term stability in humid or thermally demanding environments. The robust screw terminals accommodate standard wire gauges for secure connections in appliance and industrial control applications.

Key Features

  • Bimetallic snap-action mechanism ensures precise, repeatable switching at 50°C
  • Bakelite enclosure provides high arc resistance and thermal durability up to 150°C
  • 10A @ 250V AC/DC rating suitable for direct control of heaters, motors, and solenoids
  • Normally Open (NO) configuration ideal for safety cut-off and alarm circuits
  • Compact and lightweight design facilitates installation in space-constrained applications
  • Robust screw terminals enable reliable, vibration-resistant electrical connections
  • Fixed calibration eliminates drift and ensures consistent trip-point performance
  • Sealed construction protects the internal mechanism from dust and contaminants

Applications

  • Over-temperature protection in coffee makers, water heaters, and small appliances
  • Thermal cut-off safety switch in power supplies, transformers, and battery chargers
  • Temperature monitoring and control in incubators, fermentation chambers, and environmental cabinets
  • Industrial equipment thermal protection for motors, solenoids, and heating elements
  • DIY electronics projects requiring a simple, fixed-temperature safety interlock

Technical Specifications

Model NumberKSD301
Switch TypeBimetallic Thermostat (Normally Open)
Set Point (Trip Temperature)50°C (122°F)
Rated Voltage250V AC/DC
Rated Current10A (Resistive Load)
Contact ConfigurationNormally Open (NO)
Housing MaterialBakelite (Phenolic Resin)
Terminal TypeScrew Terminals
Approx. Weight3 g

Frequently Asked Questions

What is the switching logic of this KSD301 thermostat?

This KSD301 model is configured as Normally Open (NO). At ambient temperatures below its 50°C set point, the contacts remain open and the circuit is broken. When temperature rises to 50°C, the bimetallic disc snaps and the contacts close, completing the circuit. It is typically used to activate a cooling fan or alarm upon over-temperature.

Can this thermostat switch DC loads, and what is the current rating?

Yes, it is rated for both AC and DC loads up to 250V. The maximum switching current is 10 Amps for resistive loads (e.g., heating elements). For inductive loads like motors or solenoids, derating is recommended, and a snubber circuit may be required to protect the contacts from arcing.

How do I install and wire the KSD301 thermostat?

Mount the thermostat using its mounting holes, ensuring good thermal contact with the surface to be monitored. Connect your load (e.g., heater, fan) and power source in series through the two screw terminals. There is no polarity. Ensure wiring complies with local electrical codes for the voltage and current used.

Is the 50°C trip temperature adjustable or resettable?

No, the KSD301 features a fixed, factory-calibrated bimetallic disc set to trip at 50°C (± a few degrees tolerance). It is a manual reset device; after tripping, it will automatically reset once the temperature cools sufficiently below the set point, typically by 10-15°C.

Package Includes

  • 1 x KSD301 50°C Normally Open Temperature Control Switch Thermostat

Additional Information

Weight 0.02 kg
Dimensions 9 × 6 × 2 cm