SKU: SENS-3674
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 40°C NC, 10A 250V

₹89.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed to open a circuit at a precise 40°C setpoint. This normally closed (NC) device is rated for 10A at 250V AC/DC, providing reliable over-temperature protection for motors, transformers, and power supplies.

Features

  • Precise 40°C (±3°C) normally closed (NC) snap-action thermal switch.
  • High-current rating of 10A at 250V AC/DC for robust circuit protection.
  • Durable metallic shell construction for effective heat transfer and mechanical durability.
  • Includes 7cm insulated lead wires for straightforward electrical connection.
  • Compact form factor ideal for integration into appliances, power tools, and industrial equipment.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermostat housed in a metallic shell, engineered for precise thermal management. When the ambient temperature around its sensing surface reaches the calibrated 40°C trip point, the internal bimetallic element snaps, mechanically opening the normally closed contacts to interrupt power to the protected circuit. This action provides a failsafe, non-resettable (unless manually reset after cooling) method of preventing overheating.

Its robust construction ensures reliable performance in environments with vibration or thermal cycling. The metallic shell offers excellent thermal conductivity for accurate temperature sensing and enhances the switch’s overall durability compared to plastic-housed alternatives. It is a fundamental component for safety-critical thermal cutoff applications.

Key Features

  • Precision Thermal Protection: Snap-action bimetallic mechanism triggers at a calibrated 40°C (±3°C typical) setpoint.
  • High-Current Capacity: Rated for 10 Amps at 250 Volts AC or DC, suitable for protecting motors, heaters, and transformers.
  • Robust Metallic Housing: Shell provides superior heat conduction, mechanical strength, and longevity.
  • Normally Closed (NC) Operation: Circuit is closed under normal conditions and opens upon over-temperature, acting as a safety cutoff.
  • Pre-Wired for Easy Installation: Comes with 7cm long, insulated lead wires terminated for direct solder or connector attachment.
  • Compact and Mountable Design: Small footprint allows for installation in tight spaces; can be secured via its shell or bracket.
  • Wide Operating Voltage: Compatible with both AC and DC systems up to 250V.
  • Manual Reset: Contacts will automatically re-close once the temperature drops sufficiently below the trip point, restoring circuit operation.

Applications

  • Over-temperature protection for AC/DC motors in power tools, fans, and pumps.
  • Thermal cutoff safety device in power supplies, battery chargers, and transformers.
  • Temperature limiting in household appliances such as coffee makers, rice cookers, and electric kettles.
  • Heating element protection in industrial equipment and soldering stations.
  • Safety circuit integration in automotive electronics and 12V/24V DC systems.

Technical Specifications

Manufacturer Part NumberKSD9700/BK05-BB1D
Item TypeThermal Switch / Thermostat
Switch ActionNormally Closed (NC), Snap-Action
Setpoint Temperature40°C
Rated Voltage250V AC/DC
Rated Current10A
Cable Length7 cm
Housing MaterialMetallic Shell
Contact ConfigurationSPST (Single-Pole, Single-Throw) NC
Reset TypeAutomatic upon cooling

Frequently Asked Questions

What is the operating principle of the KSD9700/BK05-BB1D thermal switch?

The switch uses a bimetallic disc mechanism housed in a metallic shell. As temperature increases, the two metals expand at different rates, causing the disc to snap and mechanically open the normally closed (NC) electrical contacts at the precise 40°C setpoint. Once the temperature cools sufficiently, the disc snaps back to close the circuit automatically.

Can this switch handle both AC and DC voltages?

Yes, the KSD9700/BK05-BB1D is rated for 250V AC/DC at 10 Amps. This makes it suitable for a wide range of applications, from mains-powered AC appliances to 12V, 24V, or higher DC systems in automotive or industrial settings, provided the current does not exceed 10A.

How should I mount and connect this temperature control switch?

For accurate sensing, the metallic shell must be in good thermal contact with the component or surface being monitored, often secured with a bracket or clamp. The two pre-attached 7cm insulated wires are for series connection in the circuit you wish to protect. Ensure polarity is not a concern for this SPST switch, and connections are securely soldered or terminated.

Is the 40°C trip point adjustable?

No, the KSD9700/BK05-BB1D is a fixed-setpoint thermal switch. The bimetallic element is factory-calibrated to trip at 40°C (typically within a tolerance of ±3°C). For a different temperature threshold, you would need a model with a correspondingly different part number and setpoint.

Package Includes

  • 1 x KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (40°C NC, 10A 250V)

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm