SKU: SENS-3666
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch 80°C NC - 10A 250V

₹55.00 (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 rated for 10A at 250VAC, opening at a calibrated 80°C set point to interrupt power and prevent damage.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • Normally Closed (NC) contact opens at a precise 80°C (±5°C) temperature threshold.
  • High-current rating of 10A at 250VAC for direct control of heating elements or motors.
  • Compact design with integrated 7cm lead wires for simplified installation.
  • Bimetallic snap-action mechanism ensures reliable, repeatable switching.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermal protector housed in a metallic shell for efficient heat transfer and mechanical strength. Its operation is based on the differential expansion of two bonded metals, which causes a snap-action at the calibrated temperature, instantly opening the circuit. This design provides a resettable, maintenance-free solution for over-temperature cutoff without requiring external power.

Ideal for integration into appliances, power supplies, transformers, and small motors, this switch acts as a primary safety device. The metallic housing ensures rapid response to ambient temperature changes, while the sealed construction protects the internal mechanism from dust and contaminants. After tripping, the contacts automatically reset once the temperature falls below the hysteresis point, typically 10-15°C below the set point.

Key Features

  • Bimetallic snap-disc actuator for precise and reliable temperature sensing.
  • Rugged metallic shell ensures excellent thermal conductivity and impact resistance.
  • High electrical rating: 10A resistive load at 250VAC for direct circuit interruption.
  • Factory-calibrated set point of 80°C with a standard tolerance of ±5°C.
  • Normally Closed (NC) contact configuration for fail-safe circuit design.
  • Integrated 7cm insulated lead wires (approx. 2 x 0.8 x 0.2 mm) for easy connection.
  • Compact and lightweight design facilitates mounting in space-constrained applications.
  • Resettable operation eliminates the need for replacement after a thermal event.

Applications

  • Over-temperature protection in coffee makers, rice cookers, and other small kitchen appliances.
  • Thermal cutoff safety for transformers, power supplies, and battery chargers.
  • Motor winding protection in fans, pumps, and small industrial equipment.
  • Temperature monitoring and control in incubators, terrariums, and heating pads.
  • Safety interlock in soldering stations and other temperature-controlled tools.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Item TypeThermal Switch / Thermostat
Contact ConfigurationNormally Closed (NC)
Set Point (Trip Temperature)80°C
Rated Voltage250VAC
Rated Current10A (Resistive)
Cable Length7 cm
Lead Wire Dimensions2 x 0.8 x 0.2 mm (Approx.)
Housing MaterialMetallic Shell
Actuation PrincipleBimetallic Snap Disc

Frequently Asked Questions

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

The KSD9700/BK05-BB1D is factory-calibrated to open its Normally Closed contacts at 80°C. Standard manufacturing tolerance for this type of bimetallic switch is typically ±5°C, meaning the actual trip point can range between 75°C and 85°C. It will automatically reset once the temperature cools below the set point by the built-in hysteresis.

Can this switch handle inductive loads like motors?

The 10A rating is specified for resistive loads at 250VAC. For inductive loads such as motor windings or solenoids, the inrush current and voltage spikes can reduce the contact life. It is recommended to derate the current for inductive applications or use it in conjunction with a relay for higher-power motor protection.

How do I install and wire this temperature control switch?

Installation requires mechanically securing the metallic shell to the component or surface whose temperature you need to monitor, using thermal paste if necessary for optimal heat transfer. The two integrated 7cm lead wires are connected in series with the load (e.g., a heating element) on the live (hot) side of the AC line. Ensure all connections are secure and insulated.

Is this switch suitable for DC voltage applications?

While primarily rated for 250VAC, bimetallic thermal switches can often be used with DC voltages. However, DC arc suppression is more difficult, which can lead to contact pitting and reduced lifespan. For DC applications, it is advisable to consult the manufacturer's data or significantly derate the voltage and current ratings.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm