KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 85°C NC, 5A 250V
SKU: SENS-3622
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 85°C NC, 5A 250V

₹20.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed to protect electrical circuits from overheating. It features a normally closed (NC) contact that opens at its calibrated 85°C setpoint, rated for 5A at 250V AC/DC, making it suitable for integration into appliances, power supplies, and industrial control panels.

Features

  • Metallic shell construction for durability and reliable thermal conduction.
  • Normally Closed (NC) contact opens at a precise 85°C (±5°C) setpoint.
  • Rated for 5A switching current at 250V AC/DC.
  • Compact design with integrated 7cm lead wires for easy installation.
  • Bimetallic snap-action mechanism ensures quick, positive contact operation.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal protector housed in a metallic shell for optimal heat transfer and mechanical robustness. Its operation is based on the differential thermal expansion of a bimetallic element, which snaps to open the circuit when the ambient temperature reaches its factory-calibrated 85°C trip point, thereby preventing overheating in connected devices.

This switch is designed for direct series connection in the power line of the device it protects. The metallic housing ensures a fast response to temperature changes, while the snap-action mechanism provides a clear, reliable break in the circuit. It is a cost-effective, maintenance-free solution for over-temperature protection in a wide range of electrical and electronic applications.

Key Features

  • Bimetallic Snap-Disc Actuator: Provides a Sharp Microelectronics, reliable switching action with minimal contact bounce.
  • Metallic Encapsulation: Ensures excellent thermal conductivity and physical protection against environmental factors.
  • Fixed Calibration: Factory-set to trip at 85°C (normally closed configuration) with a typical tolerance of ±5°C.
  • Robust Electrical Rating: Handles up to 5 Amps at 250 Volts AC or DC for broad compatibility.
  • Pre-attached Wiring: Comes with 7cm insulated lead wires (approx. 2x0.8x0.2mm head dimensions) for simplified connection.
  • Compact and Lightweight: Minimal footprint and low mass for easy integration into space-constrained designs.
  • High-Value Build: Offers reliable over-temperature protection with an optimized performance-to-cost ratio.

Applications

  • Over-temperature protection in small household appliances (e.g., coffee makers, rice cookers, kettles).
  • Thermal safety cutoff in power supplies, battery chargers, and transformer enclosures.
  • Heating element protection in industrial equipment and process control systems.
  • Temperature monitoring and shutdown in motor windings and ventilation fans.
  • Integration into DIY electronics projects requiring a simple, reliable thermal fuse alternative.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
TypeThermal Switch / Thermostat
Contact ConfigurationNormally Closed (NC)
Trip Temperature85°C
Rated Voltage250V AC/DC
Rated Current5A
Housing MaterialMetallic Shell
Cable Length7 cm
Head Dimensions (approx.)2 x 0.8 x 0.2 mm
Operating PrincipleBimetallic Snap Disc

Frequently Asked Questions

What is the trip temperature and tolerance for this thermal switch?

This KSD9700/BK05-BB1D switch is factory-calibrated to trip (open the circuit) at 85°C. The typical operating tolerance for such bimetallic switches is ±5°C, meaning the actual trip point may occur between 80°C and 90°C depending on the specific unit and mounting conditions.

Is this switch Normally Open (NO) or Normally Closed (NC)?

This unit is configured as Normally Closed (NC). The contacts are closed at temperatures below 85°C, allowing current to flow. When the temperature rises to the trip point, the bimetallic disc snaps and opens the contacts, breaking the circuit to protect the connected device.

What is the maximum current and voltage rating?

The switch is rated for a maximum switching current of 5 Amperes at a voltage of up to 250 Volts, either AC or DC. Do not exceed these ratings, as doing so may cause contact welding or failure, compromising the safety function.

How should I mount and wire this thermal switch?

For optimal performance, mount the metallic shell of the switch directly against the surface or component you wish to monitor (e.g., a motor housing or heatsink) using thermal adhesive or a mechanical clamp to ensure good thermal contact. Connect the two pre-attached 7cm lead wires in series with the power line of the device being protected.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm

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