SKU: SENS-3519
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Generic KSD302 70°C Normally Open NC Temperature Control Switch Thermostat - Bakelite, 250V 10A

₹67.00 (Inclusive of all taxes)
Out of Stock

The Generic KSD302 is a 70°C normally-open (NC) bimetallic thermostat switch housed in a Bakelite insulating body, rated for 250V AC and 10A loads. It provides reliable, fixed-point temperature control for heating elements, appliances, and protection circuits.

Features

  • Fixed 70°C (±5°C typical) bimetallic snap-action switch
  • Normally Open (NO) contact configuration (closes on temperature rise)
  • High-current rating: 10A at 250V AC for direct load control
  • Bakelite (phenolic) housing for electrical insulation and thermal stability
  • Compact threaded body (M16x1.0 typical) for easy panel mounting

Out of stock

Description

The KSD302 is a bimetallic disc thermostat designed for over-temperature protection and control. The sensing element consists of two bonded metals with different thermal expansion rates, causing a snap-action at the calibrated setpoint (70°C). This mechanically opens or closes the electrical contacts without requiring external power, making it a simple, fail-safe solution.

Encased in durable Bakelite, the switch provides excellent electrical insulation and resistance to heat, moisture, and creep. Its threaded metal base ensures secure mounting onto heatsinks or enclosures for accurate temperature sensing of the target surface. This device is ideal for integrating into appliances, power supplies, and industrial equipment where a reliable, fixed-temperature cut-off is required.

Key Features

  • Bimetallic snap-disc actuator for precise, repeatable switching at 70°C
  • Rugged Bakelite housing ensures electrical safety and long-term stability
  • High 10A/250V AC contact rating for direct control of heaters or motors
  • Normally Open (NO) configuration closes circuit upon temperature rise
  • Compact, threaded design (approx. M16 x 1mm) facilitates panel integration
  • Wide operating temperature range suitable for appliance and industrial environments
  • Maintenance-free operation with no calibration or external power required

Applications

  • Over-temperature protection in coffee makers, water heaters, and small appliances
  • Thermal cut-off safety for power transformers, battery chargers, and power supplies
  • Temperature control in incubators, soldering equipment, and heating pads
  • Motor and pump overheating protection in industrial control panels
  • Ventilation and fan control based on enclosure temperature

Technical Specifications

Model NumberKSD302
Switch TypeBimetallic Thermostat, Normally Open (NO)
Setpoint Temperature70°C (Typical Tolerance: ±5°C)
Contact Rating10A @ 250V AC
Housing MaterialBakelite (Phenolic Resin)
Electrical ConnectionScrew Terminals (Typical)
MountingThreaded Body (Approx. M16 x 1mm)
Body Diameter~15.9 mm
Body Length~33.5 mm
Operating Temperature RangeAmbient dependent, up to setpoint

Frequently Asked Questions

What is the switching action of this KSD302 thermostat?

This KSD302 model is configured as Normally Open (NO). The internal bimetallic disc remains open at temperatures below the 70°C setpoint. When the sensed temperature rises to 70°C, the disc snaps and closes the electrical contacts, completing the circuit. It re-opens once the temperature cools below the reset point (typically a few degrees lower).

Can this thermostat switch a 120V AC heater directly?

Yes. With a contact rating of 10A at 250V AC, it can directly control resistive loads like heating elements at 120V AC. Ensure the current draw of your heater does not exceed 10A. For inductive loads (motors, solenoids), derate the current or use it with a relay for added safety.

How do I mount and wire the KSD302 thermostat?

Mount the thermostat by screwing its threaded metal base (typically M16x1.0mm) into a tapped hole on the heatsink or surface whose temperature you need to monitor. Use thermal paste for better heat transfer. Connect the load (e.g., heater) in series with one screw terminal and the power source to the other terminal. Ensure wiring is secure and rated for the current.

Is the 70°C setpoint adjustable?

No. The KSD302 is a fixed-setpoint bimetallic thermostat. The calibration is factory-set to 70°C and is not user-adjustable. For adjustable temperature control, you would need a separate electronic temperature controller with a sensor and relay output.

Package Includes

  • 1 x KSD302 70°C Normally Open Temperature Control Switch

Additional Information

Weight 0.006 kg
Dimensions 3.346 × 1.593 cm