SKU: SENS-3677
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 150°C NC, 10A 250V

₹21.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic shell, snap-action thermal switch designed for reliable over-temperature protection in electrical circuits. It operates as a normally closed (NC) switch, opening at its 150°C set point to interrupt power, and is rated for 10A at 250V AC/DC loads.

Features

  • Normally Closed (NC) snap-action thermal switch with a fixed 150°C (±5°C) trip point.
  • Rated for 10A resistive load at 250V AC/DC, suitable for direct control of heaters, motors, and transformers.
  • Durable metallic shell construction ensures robust mechanical protection and efficient thermal conductivity.
  • Compact design with 7cm lead wires for easy integration into appliances, power supplies, and industrial equipment.
  • Provides fail-safe, automatic reset upon cooling below the set point for continuous protection cycles.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermal protector housed in a metallic shell. It functions as a single-pole, single-throw (SPST) normally closed switch. When the ambient temperature surrounding its shell reaches the calibrated 150°C set point, the internal bimetallic disc snaps open, breaking the electrical circuit to prevent overheating damage to connected components.

This switch is designed for direct series connection with the load, offering a simple, non-electronic solution for thermal protection. Its metallic housing provides excellent durability and heat transfer, ensuring accurate response to ambient temperature changes. The device automatically resets once the temperature drops sufficiently below the trip point, allowing for unattended, cyclical operation in applications like coffee makers, transformers, battery packs, and small industrial heaters.

Key Features

  • Fixed Temperature Trip: Precisely calibrated bimetallic mechanism opens at 150°C (±5°C tolerance) for consistent over-temperature protection.
  • High-Current Switching: Robust contacts capable of handling 10 Amps at 250V AC/DC, enabling direct control of significant loads.
  • Durable Metallic Enclosure: Shell construction offers mechanical strength, corrosion resistance, and optimal thermal sensing response.
  • Normally Closed (NC) Operation: Circuit is closed under normal conditions, opening only upon over-temperature for fail-safe protection.
  • Automatic Reset Function: Contacts re-close automatically once the temperature cools, allowing for repeated protection cycles without manual intervention.
  • Simple Two-Wire Installation: Easy integration into existing circuits via its 7cm insulated lead wires.

Applications

  • Over-temperature protection in small kitchen appliances (e.g., coffee makers, electric kettles, rice cookers).
  • Thermal cutoff for power transformers, battery chargers, and power supply units.
  • Safety switch in electric motors, solenoids, and heating elements within industrial control panels.
  • Temperature monitoring and protection in 3D printer heated beds and extruder assemblies.
  • Fail-safe mechanism for LED drivers, lighting fixtures, and ventilation fans.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Switch TypeThermal Protector, Normally Closed (NC)
Trip Temperature150°C
Rated Voltage250V AC/DC
Rated Current10A (Resistive Load)
Contact ConfigurationSPST (Single Pole, Single Throw)
Housing MaterialMetallic Shell
Cable Length7 cm (approx.)
Reset TypeAutomatic (upon cooling)

Frequently Asked Questions

What is the trip temperature and tolerance for this KSD9700 switch?

The KSD9700/BK05-BB1D is factory set to trip (open the circuit) at 150°C. Typical manufacturing tolerance for this type of bimetallic snap-action switch is approximately ±5°C, meaning the actual trip point may range from 145°C to 155°C under standard conditions.

Can I use this switch to directly control a 120V AC heater drawing 8A?

Yes, this switch is suitable for that application. It is rated for 10A at 250V AC, which is well above your 8A, 120V load. Ensure you connect it in series with the live (hot) wire of the heater circuit. The metallic shell must be positioned to accurately sense the temperature of the protected component or environment.

How does the reset function work on this normally closed thermal switch?

This is an automatic reset switch. Once it trips open at 150°C, it will remain open until the temperature around its metallic shell cools down sufficiently below the trip point (typically by 15-30°C). The internal bimetallic disc will then snap back, re-closing the contacts and restoring power to the circuit without any manual intervention.

What is the physical mounting and installation method for this switch?

The switch is primarily mounted via its metallic shell, which should be in good thermal contact with the component or area being monitored, often using a clip, bracket, or thermal adhesive. The two 7cm insulated lead wires are used for electrical connection. Ensure wires are securely crimped or soldered, and the installation avoids stressing the wire-to-shell junction.

Package Includes

  • 1 x KSD9700/BK05-BB1D Temperature Control Switch

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm