SKU: SENS-3682
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 120C NC, 10A 250V

₹39.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed for over-temperature protection in electrical appliances and industrial equipment. It features a normally closed (NC) contact that opens at a calibrated 120°C, rated for 10A at 250V AC/DC.

Features

  • Normally Closed (NC) snap-action bimetallic thermal switch opens at 120°C set point.
  • Rated for 10A resistive load at 250V AC/DC for reliable circuit interruption.
  • Durable metallic shell ensures robust mechanical protection and good thermal conductivity.
  • Compact design with 7cm lead wires for easy integration into appliances and control panels.
  • Automatically resets when temperature cools below the set point, providing reusable protection.

Out of stock

Description

The KSD9700/BK05-BB1D thermal control switch utilizes a bimetallic disc mechanism housed within a metallic shell. When the ambient temperature reaches the factory-calibrated trip point of 120°C, the disc snaps, mechanically opening the normally closed electrical contacts to break the circuit. This action provides critical over-temperature protection for motors, transformers, power supplies, and heating elements.

Its metallic construction offers excellent durability, resistance to physical damage, and efficient heat transfer to the sensing element for accurate response. The switch is designed for automatic reset upon cooling, making it a maintenance-free solution for recurring thermal protection scenarios in appliances, industrial control cabinets, and battery packs.

Key Features

  • Bimetallic snap-action mechanism ensures fast, reliable contact opening at the precise temperature set point.
  • High-current 10A rating at 250V AC/DC for direct control of significant loads without an external relay.
  • Robust metallic housing provides mechanical strength and protects the internal mechanism from environmental contaminants.
  • Normally Closed (NC) contact configuration is ideal for safety circuits that require power interruption upon overheating.
  • Automatic reset functionality allows for continuous, unattended operation without manual intervention.
  • Pre-calibrated factory setting at 120°C (±5°C typical) ensures consistent performance across units.
  • Compact form factor with integrated 7cm insulated lead wires simplifies installation and wiring.
  • Wide operating temperature range suitable for demanding applications in consumer electronics and industrial environments.

Applications

  • Over-temperature protection in AC/DC power supplies, battery chargers, and transformers.
  • Thermal cutoff safety for electric motors, solenoids, and industrial heating elements.
  • Temperature monitoring and control in household appliances like coffee makers, rice cookers, and hair dryers.
  • Battery pack protection in power tools, e-bikes, and backup power systems to prevent thermal runaway.
  • Thermal management in LED drivers, power amplifiers, and other electronic enclosures requiring ventilation control.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
FunctionTemperature Control Switch (Thermal Protector)
Contact ConfigurationNormally Closed (NC)
Trip Temperature120°C
Rated Voltage250V AC/DC
Rated Current10A (Resistive)
Housing MaterialMetallic Shell
Cable Length7 cm
Head Dimensions2.0 x 0.8 x 0.2 mm (Terminal)
Reset TypeAutomatic (on cool-down)
Actuation TypeSnap-action Bimetallic Disc

Frequently Asked Questions

What is the contact configuration and how does the KSD9700 switch operate?

The KSD9700/BK05-BB1D is a Normally Closed (NC) bimetallic thermal switch. At room temperature, the circuit is closed. When the temperature at the switch's metallic shell reaches the calibrated 120°C set point, the internal bimetallic disc snaps, mechanically opening the contacts to interrupt the current flow, providing over-temperature protection.

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

This switch is rated for a maximum of 10 Amps at 250 Volts AC or DC, assuming a resistive load. This rating allows it to directly control significant loads like heating elements or motors without requiring an external relay for many applications. Always ensure the inrush current of your load does not exceed this rating.

Does the switch reset automatically, and how should it be mounted?

Yes, the switch features an automatic reset. Once the temperature cools below the trip point (typically a few degrees below 120°C), the bimetallic disc snaps back, closing the contacts and restoring the circuit. For accurate operation, mount the metallic shell in direct thermal contact with the component or area you need to monitor, using thermal paste if necessary.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm