SKU: SENS-3649
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch 5A 250V 145C Normally Open

₹39.00 (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, opening its normally closed (NC) contacts at a calibrated 145°C. This compact, durable protector is designed for direct integration into appliances, power supplies, and industrial equipment to prevent overheating and ensure operational safety.

Features

  • Metallic shell construction for robust thermal response and durability.
  • Rated for 5A @ 250V AC/DC, suitable for direct line-level switching.
  • Calibrated snap-action bimetallic disc opens at 145°C (normally closed operation).
  • Compact dimensions with integrated 7cm lead wires for easy installation.
  • Designed for over-temperature protection in motors, transformers, and heating elements.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermostat housed in a metallic shell, engineered for reliable over-temperature protection. Its snap-action mechanism provides a Sharp Microelectronics, positive contact break at the precise setpoint of 145°C, ensuring consistent performance and preventing contact chatter that could lead to arcing or premature failure.

This thermal switch is designed for direct series connection with the load, requiring no external power supply. The metallic shell ensures efficient thermal conduction from the protected device, while the internal construction provides electrical isolation and mechanical stability. It is a critical safety component for applications where passive, self-resetting thermal cutoff is required.

Key Features

  • Bimetallic snap-action disc ensures precise, repeatable trip point at 145°C.
  • Metallic housing provides excellent thermal conductivity and mechanical strength.
  • Rated for 5A switching current at up to 250V AC or DC.
  • Normally closed (NC) contacts open upon reaching setpoint, breaking the circuit.
  • Self-resetting operation automatically closes contacts upon cooling below reset temperature.
  • Compact form factor with pre-attached 7cm insulated lead wires for simplified wiring.
  • Designed for high reliability and long service life in demanding thermal environments.
  • High-value build for cost-effective integration into mass-produced equipment.

Applications

  • Over-temperature protection in small AC/DC motors, fans, and transformers.
  • Thermal cutoff safety for coffee makers, kettles, and other small household appliances.
  • Protection of power supplies, battery chargers, and LED drivers from excessive heat.
  • Integration into industrial control cabinets and machinery for component safety.
  • Thermal management in audio amplifiers and power electronics enclosures.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
FunctionTemperature Control Switch / Thermostat
Contact ConfigurationNormally Closed (NC) - Opens on Temperature Rise
Setpoint (Trip) Temperature145 °C
Rated Voltage250V AC/DC
Rated Current5 A
Housing MaterialMetallic Shell
Cable Length7 cm (approx.)
Head Dimensions2 x 0.8 x 0.2 mm (Terminal Head)
Shipping Weight0.03 kg
Shipping Dimensions9 x 7 x 1 cm

Frequently Asked Questions

What is the contact configuration of the KSD9700/BK05-BB1D switch?

The KSD9700/BK05-BB1D is a normally closed (NC) bimetallic switch. The contacts are closed under normal operating temperatures and will snap open to break the circuit once the sensing point reaches its calibrated setpoint of 145°C. The contacts will automatically reset and close again once the temperature cools below the reset point.

What is the maximum electrical load this thermal switch can handle?

This switch is rated for a maximum current of 5 Amperes at a voltage of up to 250 Volts, either AC or DC. It is designed for direct in-line switching of the load circuit. Do not exceed these ratings, and ensure the connected load's inrush current does not exceed the switch's capacity to avoid contact welding.

How should I mount and install this temperature control switch?

For optimal performance, the metallic shell of the switch must be in good thermal contact with the component or surface you wish to monitor. Use thermal adhesive, a mounting clip, or secure it directly to a hot spot. Ensure the 7cm lead wires are connected in series with the load being protected, observing proper polarity for DC applications.

Is this a self-resetting switch or a one-time fuse?

This is a self-resetting, reusable switch. It uses a bimetallic disc that snaps between two states with temperature change. Once the temperature falls below its reset point (typically several degrees below the 145°C trip point), the disc will snap back, closing the contacts and restoring the circuit automatically without manual intervention.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm