SKU: SENS-3545
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (145°C NO, 10A 250V)

₹49.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch rated for 10A at 250V AC, designed to open its normally closed (NO) contacts at a calibrated temperature of 145°C. It provides reliable, non-resettable over-temperature protection for industrial equipment, power supplies, and heating elements.

Features

  • Metallic shell construction for durability and effective thermal transfer.
  • Fixed, factory-calibrated trip temperature of 145°C (±5°C typical).
  • High current capacity: 10A resistive load at 250V AC.
  • Normally Open (NO) contact configuration opens on temperature rise.
  • Compact form factor for integration into appliances and control panels.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal switch, where a calibrated snap-action disc reverses at its set point, physically opening the electrical contacts. This provides a failsafe, non-resettable cut-off for over-temperature conditions. The metallic shell ensures rapid thermal response and robust mechanical protection.

Designed for direct series connection with the load, this switch is suitable for AC mains applications. Its fixed calibration point makes it ideal for applications requiring a precise, one-time thermal safety limit without the complexity of electronic controllers.

Key Features

  • Bimetallic snap-action mechanism for reliable, repeatable switching.
  • High-current silver alloy contacts for long electrical life.
  • Sealed metallic housing protects internal mechanism from contaminants.
  • Fast thermal response due to direct shell-to-disc heat conduction.
  • UL/CQC recognized component for safety-critical designs.
  • Optimized performance-to-cost ratio for volume applications.

Applications

  • Over-temperature protection in coffee makers, electric kettles, and water heaters.
  • Thermal cut-off safety for power transformers, motors, and solenoids.
  • Safety interlock in industrial heating elements and cartridge heaters.
  • Protection circuit for battery chargers and power supply units.
  • Appliance safety compliance and UL certification projects.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Switch TypeNormally Open (NO)
Trip Temperature145°C
Maximum Current10A (Resistive, 250V AC)
Maximum Voltage250V AC
Contact ConfigurationSPST, Normally Open
Housing MaterialMetallic Shell
Reset TypeNon-resettable (Manual replacement required)
Terminal TypeQuick-connect spade (0.25")

Frequently Asked Questions

Is this thermal switch resettable or does it need replacement after tripping?

The KSD9700/BK05-BB1D is a non-resettable, one-time-use thermal cut-off switch. Once the internal bimetallic disc snaps open at 145°C, the switch remains permanently open and must be physically replaced to restore circuit continuity. This design ensures failsafe protection.

What is the electrical rating and can it switch DC voltage?

This switch is rated for a maximum of 10 Amperes at 250 Volts AC, resistive load. While it may function with DC, the rating is specified for AC due to arc suppression characteristics. For DC applications, derating is strongly recommended, and the voltage/current limits should be significantly lower than the AC rating.

How do I mount and wire the KSD9700 thermal switch?

Mount the metallic shell directly against the heat source (e.g., motor housing, heater block) using the provided mounting hole for optimal thermal conduction. Wire it in series with the load using the quick-connect spade terminals (0.25"). Ensure good mechanical contact and avoid insulating the shell, as this will delay its response.

Package Includes

  • 1 x KSD9700/BK05-BB1D Temperature Control Switch

Additional Information

Weight 0.02 kg
Dimensions 12 × 9 × 1 cm

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