SKU: SENS-3556
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KSD302 Ceramic Normally Open NC Temperature Control Switch Thermostat 70°C - 250V 10A

₹20.00 (Inclusive of all taxes)
Out of Stock

The KSD302 is a ceramic-bodied, normally open (NC) thermal switch designed for precise temperature control at a 70°C set point. It is rated for 250V AC/DC and 10A loads, making it suitable for direct integration into heating circuits, appliance safety cut-offs, and industrial control panels.

Features

  • Ceramic housing for high thermal stability and electrical insulation
  • Normally Open (NO) contact configuration opens at 70°C set point
  • Rated for 250V AC/DC and 10A switching capacity
  • Compact and durable mechanical thermostat design
  • Direct integration into mains-powered heating and protection circuits

Out of stock

Description

The KSD302 is a bimetallic disc-type thermostat housed in a robust ceramic body. This construction provides excellent electrical insulation and thermal conductivity, ensuring accurate response to ambient temperature changes. The switch mechanism is a snap-action type, offering reliable and Sharp Microelectronics contact separation at the calibrated 70°C (±5°C typical) trip point.

As a normally open (NO) device, the contacts remain closed at temperatures below the set point, allowing current flow. Upon reaching the 70°C threshold, the bimetallic disc snaps, opening the contacts to break the circuit. This simple, purely mechanical operation makes it ideal for fail-safe over-temperature protection in appliances, transformers, and power supplies without requiring external power.

Key Features

  • High-Durability Ceramic Housing: Provides superior electrical isolation and withstands thermal cycling without degradation.
  • Precision Bimetallic Actuator: Ensures consistent trip point accuracy at the 70°C calibration.
  • Snap-Action Switching: Delivers positive, quick contact separation for reliable circuit interruption and reduced arcing.
  • 10A @ 250V AC/DC Rating: Suitable for directly switching significant resistive or inductive loads in control applications.
  • Compact and Mountable Design: Features a compact form factor with mounting holes for secure installation in enclosures.
  • Maintenance-Free Operation: Fully sealed mechanical design requires no calibration or power supply.

Applications

  • Over-temperature safety cut-off in coffee makers, water heaters, and small kitchen appliances.
  • Thermal protection for power transformers, battery chargers, and power supply units.
  • Temperature control in incubators, terrariums, and low-power heating systems.
  • Safety interlock in motor control circuits and industrial equipment enclosures.

Technical Specifications

Model NumberKSD302
Switch TypeNormally Open (NO) / Thermal Cut-Off
Set Point (Trip Temperature)70°C
Contact Rating10A @ 250V AC/DC
Housing MaterialCeramic
Contact ConfigurationSPST (Single-Pole, Single-Throw) Normally Open
Actuation TypeBimetallic Snap Disc
Approximate Weight3 g

Frequently Asked Questions

What does 'Normally Open (NO)' mean for this KSD302 switch?

In its normal, cool state (below 70°C), the switch contacts are closed, allowing current to flow through the circuit. When the ambient temperature reaches the 70°C set point, the internal bimetallic disc snaps and opens the contacts, breaking the circuit. This configuration is used for over-temperature cutoff protection.

Can this switch handle 240V AC mains voltage?

Yes. The KSD302 is rated for 250V AC/DC, making it suitable for direct integration into 120V or 240V AC mains circuits for controlling heaters or as a safety cut-off. Ensure the load current does not exceed its 10A rating and that installation complies with all local electrical codes.

How is the 70°C set point calibrated and what is the tolerance?

The trip temperature is factory-set by the mechanical properties of the bimetallic disc inside the ceramic housing. Typical tolerance for this type of snap-action thermostat is ±5°C. The set point is fixed and cannot be adjusted by the user.

What type of loads can I control with the 10A rating?

The 10A rating is suitable for resistive loads like heating elements or incandescent lamps. For inductive loads (motors, solenoids), derating is recommended to account for inrush current. Always ensure the steady-state operating current of your load is well below the 10A maximum for reliable, long-term operation.

Package Includes

  • 1 x KSD302 Ceramic Temperature Control Switch (70°C, NO, 250V 10A)

Additional Information

Weight 0.03 kg
Dimensions 9 × 6 × 3 cm