SKU: SENS-3639
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch 40°C Normally Open - 5A 250V

₹78.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic shell, snap-action thermal switch designed to open an electrical circuit at a precise 40°C setpoint. Rated for 5A at 250V AC/DC, it provides reliable over-temperature protection for motors, transformers, and power supplies.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • Precise 40°C (±3°C typical) normally-open (NO) snap-action switching.
  • Rated for 5A at 250V AC/DC, suitable for a wide range of electrical loads.
  • Compact form factor with 7cm lead wires for easy integration.
  • Manual reset upon cooling for restored circuit operation.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermostat housed in a metallic shell for optimal thermal response. The internal snap-action mechanism provides a crisp, reliable electrical break at the calibrated temperature threshold of 40°C, protecting sensitive components from heat damage. Its normally-open configuration ensures the circuit is interrupted upon reaching the setpoint.

This thermal switch is designed for direct mounting on heat sinks, motor housings, or within enclosures where ambient temperature monitoring is critical. The metallic shell ensures fast thermal transfer and mechanical robustness in industrial and consumer appliance environments. It operates on a simple, fail-safe principle requiring no external power, making it a reliable choice for safety-critical thermal cutoff applications.

Key Features

  • Bimetallic snap-action mechanism for precise and repeatable switching at 40°C.
  • Metallic housing ensures excellent thermal conductivity and mechanical strength.
  • High electrical rating of 5A at 250V AC/DC for direct load switching.
  • Normally-open (NO) contact configuration opens the circuit upon temperature rise.
  • Compact dimensions (approx. 9 x 7 x 1 cm) with integrated 7cm lead wires.
  • Manual reset function automatically restores contact once temperature drops below the setpoint.
  • Designed for a wide range of operating environments requiring over-temperature protection.

Applications

  • Over-temperature protection for small motors, transformers, and solenoids.
  • Thermal cutoff in power supplies, battery chargers, and LED drivers.
  • Safety interlock in household appliances like coffee makers, heaters, and hair dryers.
  • Temperature monitoring in electronic enclosures and control cabinets.
  • Preventive thermal protection in automotive auxiliary systems.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
TypeThermal Switch / Thermostat
Contact ConfigurationNormally Open (NO)
Setpoint Temperature40°C
Rated Voltage250V AC/DC
Rated Current5A
Operating PrincipleBimetallic Snap-Action
Housing MaterialMetallic Shell
Cable Length7 cm
Approx. Dimensions (L x W x H)9 x 7 x 1 cm
Approx. Weight0.03 kg

Frequently Asked Questions

What is the switching action of this KSD9700 thermostat?

This is a normally-open (NO) bimetallic thermostat. The electrical contacts are open at temperatures below the 40°C setpoint. When the sensed temperature rises to 40°C, the internal bimetallic disc snaps to close the circuit path, but as a protective device, it is typically wired to interrupt power, effectively opening the load circuit to stop operation and prevent overheating.

What is the maximum electrical load this switch can handle?

The KSD9700/BK05-BB1D is rated for a maximum of 5 Amps at 250 Volts, either AC or DC. This rating is suitable for directly switching small motors, heating elements, or transformers without requiring an additional relay. Do not exceed these ratings to ensure reliable operation and safety.

How do I mount and use this thermal switch?

Mount the metallic shell of the switch directly onto the surface you wish to monitor (e.g., motor housing, heat sink) using thermal adhesive or a mechanical clamp to ensure good thermal contact. Connect the two lead wires in series with the load you want to protect. The switch will automatically reset once the temperature cools below the setpoint.

Package Includes

  • 1 x KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm