SKU: SENS-3660
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Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (115C NC) - 5A 250V

₹39.00 (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, featuring a fixed 115°C normally closed (NC) setpoint. This compact protector is designed for direct integration into electrical circuits for over-temperature cutoff in appliances, power supplies, and industrial controls.

Features

  • Fixed 115°C normally closed (NC) snap-action thermal switch.
  • Rated for 5A continuous current at 250V AC/DC.
  • Durable metallic shell construction for reliable thermal conduction and mechanical protection.
  • Compact form factor with integrated 7cm lead wires for easy PCB or terminal block connection.
  • Designed for automatic circuit interruption upon reaching setpoint temperature.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermal switch that operates on a snap-action principle. When the ambient temperature around its metallic shell reaches the calibrated 115°C setpoint, the internal bimetallic element deforms, instantly opening the normally closed (NC) contacts to break the circuit. This provides a failsafe, non-resettable cutoff to protect motors, transformers, heating elements, and other components from thermal overload.

Its robust metallic housing ensures efficient heat transfer from the protected device to the sensing element and offers superior durability in high-vibration or harsh electrical environments compared to plastic-bodied switches. The switch remains open until the temperature cools below the reset point (typically several degrees below the setpoint), at which point the contacts automatically close to restore power.

Key Features

  • Precision Thermal Protection: Fixed 115°C (±5°C typical) actuation point for consistent over-temperature cutoff.
  • Robust Electrical Rating: Handles up to 5A at 250V AC/DC, suitable for direct control of small motors and heaters.
  • Durable Metallic Shell: Provides excellent thermal conductivity, mechanical strength, and resistance to environmental factors.
  • Snap-Action Mechanism: Ensures quick, positive contact opening and closing to prevent arcing and contact welding.
  • Normally Closed Configuration: Default closed circuit allows normal operation; opens only upon temperature fault.
  • Compact & Pre-Wired: Small footprint with 7cm insulated lead wires for straightforward soldered or screw-terminal installation.
  • Wide Application Suitability: Engineered for integration into consumer appliances, power supplies, battery packs, and industrial control panels.

Applications

  • Over-temperature protection in AC/DC power supplies and battery chargers.
  • Thermal cutoff for small appliance motors, fans, and heating elements (e.g., coffee makers, soldering irons).
  • Safety interlock in transformer compartments and power distribution units.
  • Temperature monitoring and shutdown in LED drivers and high-power lighting fixtures.
  • Embedded protection within industrial control cabinets and PLC enclosures.

Technical Specifications

Manufacturer Part NumberKSD9700/BK05-BB1D
TypeThermal Switch / Thermostat
Contact ConfigurationNormally Closed (NC)
Setpoint Temperature115°C
Rated Voltage250V AC/DC
Rated Current5A
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 reset behavior of this KSD9700 thermal switch?

This is an automatic reset, snap-action bimetallic switch. When the temperature rises to its 115°C setpoint, the contacts open (break the circuit). Once the temperature cools below the reset point (typically ~5-15°C below the setpoint), the contacts will automatically close again to restore the circuit, requiring no manual intervention.

Can this switch be used to directly control a 120V AC appliance?

Yes, its 5A at 250V AC rating is suitable for directly switching small loads on a 120V AC line. It can be wired in series with the load (like a heating element or fan motor) to provide over-temperature cutoff. Ensure the inrush current of your load does not exceed the switch rating.

How should I mount the KSD9700 switch for proper temperature sensing?

For accurate sensing, the metallic shell must be in good thermal contact with the component or area you wish to monitor. Mount it using the provided leads, securing the body directly against a heatsink, motor housing, or transformer core using thermal adhesive, a clamp, or a mounting bracket. Avoid insulating the shell.

Is this switch suitable for DC voltage applications?

Yes, the 250V rating covers both AC and DC voltages. It can be used in DC circuits (e.g., for battery pack or power supply protection) up to 250V DC, maintaining the same 5A current rating. The snap-action mechanism is effective for both AC and DC interruption.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm