SKU: SENS-3520
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 5A 250V, 150°C NC

₹19.00 (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, designed to open its normally closed (NC) contacts at a calibrated 150°C (302°F) for over-temperature protection in appliances, power supplies, and industrial equipment.

Features

  • Metallic shell construction for durability and effective thermal conduction
  • Rated for 5A resistive load at 250V AC/DC
  • Normally Closed (NC) contacts open at calibrated 150°C (302°F) setpoint
  • Snap-action bimetal disc mechanism for reliable, repeatable switching
  • Compact form factor for integration into tight spaces

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal protector housed in a metallic shell. It functions as a single-pole, single-throw (SPST) normally closed switch. When the ambient temperature around the switch body reaches its factory-calibrated 150°C trip point, the internal bimetal disc snaps, mechanically opening the circuit to cut power and prevent overheating.

This switch is designed for direct series connection with the load or heater circuit it protects. Its metallic housing ensures rapid thermal response and robust physical protection. It is suitable for a wide range of AC and DC applications requiring a simple, non-resettable (one-time trip) or automatic-reset (upon cooling) over-temperature cutoff.

Key Features

  • Metallic shell for mechanical strength and optimal thermal transfer
  • High-current 5A rating suitable for directly switching small motors, heaters, or transformers
  • Precise 150°C (±5°C typical) trip temperature calibration
  • Normally Closed (NC) contact configuration for fail-safe circuit interruption
  • Snap-action mechanism ensures quick, clean break to prevent contact arcing
  • Compact design (approx. 11mm x 5mm x 1mm body) for space-constrained installations
  • Wide voltage compatibility up to 250V AC/DC

Applications

  • Over-temperature protection in coffee makers, rice cookers, and small kitchen appliances
  • Thermal cutoff for transformers, power supplies, and battery chargers
  • Safety interlock in soldering irons, 3D printer heated beds, and lab equipment
  • Motor protection in fans, pumps, and compressors
  • Industrial control panel and enclosure temperature monitoring

Technical Specifications

Manufacturer Part NumberKSD9700/BK05-BB1D
Switch TypeNormally Closed (NC), Snap-Action Bimetallic
Rated Current5A Resistive
Rated Voltage250V AC/DC
Trip Temperature150°C (302°F)
Reset TemperatureTypically ~20-30°C below trip point (Automatic Reset)
Housing MaterialMetallic Shell
Contact ConfigurationSPST (Single Pole, Single Throw)
Terminal TypeQuick-Connect / Blade Terminals
Approximate Dimensions (LxWxH)11 x 5 x 1 mm (Body)
Approximate Weight0.01 kg

Frequently Asked Questions

What is the electrical rating of this KSD9700 thermal switch?

This switch is rated for a maximum resistive load of 5 Amps at up to 250 Volts, either AC or DC. It is designed to directly interrupt the power circuit of the device it protects. Ensure your load current does not exceed this 5A rating for reliable operation and safety.

How does this Normally Closed (NC) temperature switch work?

The switch contacts are normally closed, allowing current to flow. When the temperature sensed by its metallic housing reaches the calibrated 150°C (302°F) setpoint, an internal bimetallic disc snaps open, mechanically breaking the circuit. It typically resets automatically once the temperature cools down by 20-30°C below the trip point.

How should I install and wire this thermal protector?

Install the switch in direct thermal contact with the component or area you need to monitor (e.g., motor winding, heatsink). Connect it in series with the load (e.g., heater, motor) using its quick-connect blade terminals. Ensure good thermal coupling and avoid stressing the terminals during installation for accurate temperature sensing.

Is this switch suitable for 120V AC household applications?

Yes, its 250V rating comfortably exceeds standard 120V AC line voltage. The 5A current rating is suitable for protecting devices drawing up to 600W (at 120V) or 1250W (at 250V), making it appropriate for many small appliances, tools, and industrial controls.

Package Includes

  • 1 x KSD9700/BK05-BB1D Temperature Control Switch

Additional Information

Weight 0.01 kg
Dimensions 1.1 × 0.5 × 0.1 cm