SKU: SENS-3522
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 5A 250V, 35°C Normally Open

₹104.00 (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 upon reaching its 35°C setpoint. This compact, durable protector integrates directly into electrical circuits for over-temperature safety in appliances, power supplies, and industrial controls.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • 5A switching capacity at up to 250V AC/DC for reliable circuit interruption.
  • Precise 35°C (±3°C) normally open (NO) setpoint for over-temperature protection.
  • Compact form factor (approx. 9 x 7 x 1 cm) for easy integration into tight spaces.
  • Simple two-wire (SPST) connection for straightforward series installation in power lines.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal switch housed in a metallic shell for optimal heat transfer and mechanical strength. Its internal snap-action mechanism provides a crisp, reliable contact opening at the calibrated temperature threshold of 35°C, effectively breaking the circuit to prevent overheating in connected devices.

Engineered for direct series connection in AC or DC power lines, this switch operates as a normally open (NO) device, meaning the contacts are open at ambient temperature and close when cooled below the setpoint. Its robust design ensures stable performance across a wide range of environmental conditions, making it suitable for integration into consumer appliances, battery packs, transformers, and small motor controls where automatic thermal cutoff is required.

Key Features

  • Bimetallic snap-action disc ensures fast, reliable contact operation at setpoint.
  • Metallic housing provides excellent thermal sensitivity and EMI shielding.
  • Rated for 5A resistive load at 250V AC/DC, suitable for direct mains-level control.
  • Fixed 35°C (±3°C typical) actuation temperature with high repeatability.
  • SPST normally open (NO) configuration for fail-safe over-temperature cutoff.
  • Compact and lightweight design (0.03 kg) for space-constrained applications.
  • Includes 7cm lead wires for simplified wiring and installation.
  • High-value build for cost-effective thermal protection in mass-produced devices.

Applications

  • Over-temperature protection in AC/DC power adapters and battery chargers.
  • Thermal cutoff safety for small motors, solenoids, and transformer windings.
  • Temperature monitoring and control in household appliances (e.g., coffee makers, heaters).
  • Battery pack thermal management in power tools and portable electronics.
  • Industrial control panel component protection against enclosure overheating.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Item TypeThermal Control Switch
Rated Voltage250V AC/DC
Operating Current5A
Switch ConfigurationSPST, Normally Open (NO)
Actuation Temperature35°C
Cable Length7 cm
Head Dimensions2 x 0.8 x 0.2 mm (Terminal)
Housing MaterialMetallic Shell
Shipping Weight0.03 kg
Shipping Dimensions9 x 7 x 1 cm

Frequently Asked Questions

What is the electrical rating and configuration of this thermal switch?

This switch is rated for 5 Amps at up to 250 Volts AC or DC. It is a Single-Pole, Single-Throw (SPST) switch configured as Normally Open (NO), meaning the contacts are open at room temperature and will close when cooled below its 35°C setpoint, opening again when the temperature rises above it.

How do I wire the KSD9700/BK05-BB1D switch into my circuit?

Wire the switch in series with the load you wish to protect on the live (hot) wire. The two lead wires are not polarized. When the ambient temperature reaches the 35°C setpoint, the internal bimetallic disc will snap, opening the contacts and interrupting power to the load, providing automatic over-temperature cutoff.

Can this switch be used for both AC and DC power systems?

Yes, the switch is rated for 250V and 5A for both AC and DC loads. Ensure your application's voltage and current do not exceed these ratings. It is suitable for low-power mains applications (e.g., small appliances) and DC circuits like battery packs or power supplies.

What is the accuracy and reset behavior of the 35°C setpoint?

The actuation temperature is factory-set to 35°C with a typical tolerance of ±3°C. It features a snap-action mechanism with a hysteresis differential; the contacts will reset (close) once the temperature cools several degrees below the setpoint. The exact reset temperature depends on the specific bimetallic disc calibration.

Is the metallic housing necessary for proper operation?

Yes. The metallic shell is crucial for efficient thermal conduction from the protected component or environment to the internal bimetallic element. For accurate sensing, ensure the switch body is in good thermal contact with the heat source, typically via mounting clips, thermal paste, or direct attachment.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm