SKU: SENS-3655
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Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 120C Normally Open, 5A 250V

₹19.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch rated for 5A at 250V AC/DC, designed to open its contacts at a calibrated 120°C. This normally-open (NO) bimetallic thermostat provides reliable over-temperature protection for motors, transformers, power supplies, and other electrical equipment.

Features

  • Metallic shell construction for durability and good thermal conductivity.
  • Normally Open (NO) contact configuration opens circuit upon reaching 120°C set point.
  • Rated for 5A at 250V AC/DC, suitable for a wide range of electrical loads.
  • Snap-action bimetallic disc ensures precise switching and reliable operation.
  • Compact design with integrated 7cm lead wires for easy installation.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic thermal cut-off switch housed in a metallic shell. It operates on a snap-action principle: a calibrated bimetallic disc deforms at its specific temperature threshold (120°C), rapidly opening the electrical contacts to break the circuit. This action provides fail-safe protection against overheating in enclosed or high-power environments.

Its metallic housing ensures robust mechanical protection and efficient heat transfer from the protected component to the sensing element. The switch is designed for direct series connection in the power line of the device it protects, making it a simple and effective solution for thermal management in appliances, power tools, lighting, and industrial control cabinets.

Key Features

  • Metallic Shell Housing: Provides mechanical strength and efficient thermal conduction for accurate temperature sensing.
  • Precision Bimetallic Actuator: Ensures a consistent and reliable snap-action at the calibrated 120°C trip point.
  • 5A/250V Electrical Rating: Robust switching capacity for direct protection of motors, heaters, and transformers.
  • Normally Open Configuration: Circuit is closed during normal operation and opens upon over-temperature condition.
  • Integrated Connection Leads: Features 7cm pre-attached wires for simplified wiring and installation.
  • Compact Form Factor: Small dimensions allow for installation in space-constrained applications.
  • Wide Operating Range: Suitable for use in various environments where over-temperature protection is critical.

Applications

  • Over-temperature protection for AC/DC motors in power tools and appliances.
  • Thermal cutoff in power supplies, battery chargers, and transformers.
  • Safety interlock in heating elements, coffee makers, and small kitchen appliances.
  • Temperature monitoring and protection in lighting ballasts and LED drivers.
  • Preventive safety device in industrial control cabinets and electrical enclosures.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
TypeThermal Cut-Off Switch / Thermostat
Contact ConfigurationNormally Open (NO)
Trip Temperature120°C
Rated Voltage250V AC/DC
Rated Current5A
Housing MaterialMetallic Shell
Cable Length7 cm
Head Dimensions2 x 0.8 x 0.2 mm
Reset TypeManual (cooling required)
Shipping Weight0.03 kg
Shipping Dimensions9 x 7 x 1 cm

Frequently Asked Questions

Is this KSD9700 switch normally open or normally closed?

This specific KSD9700/BK05-BB1D model is configured as Normally Open (NO). This means the electrical contacts are open at room temperature and will close when installed, allowing current to flow. When the sensing temperature reaches 120°C, the bimetallic disc snaps and opens the contacts, breaking the circuit to stop current flow and provide over-temperature protection.

What is the maximum electrical load this thermal switch can handle?

This thermal switch is rated for a maximum of 5 Amps at 250 Volts, either AC or DC. It is designed to be connected in series with the power line of the device it is protecting. Ensure the steady-state current of your application does not exceed 5A to maintain reliable switching and avoid contact welding or premature failure.

How do I install and reset this temperature control switch?

Install the switch by connecting its two lead wires in series with the power line of the device to be protected. Mount the metallic sensing head directly onto or in close thermal contact with the component you wish to monitor (e.g., motor winding, transformer core). The switch is not self-resetting. After it trips at 120°C, you must allow the protected device to cool down significantly below the trip point for the bimetallic disc to snap back and manually close the circuit again.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm