SKU: SENS-3620
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Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 5A 250V, 90°C NC

₹21.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a normally closed (NC) metallic shell thermal switch designed for over-temperature protection in electrical circuits. It opens at its 90°C setpoint to interrupt current, safeguarding components in appliances, power supplies, and industrial equipment.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • Normally closed (NC) contact opens at a fixed 90°C (±5°C typical) setpoint.
  • Rated for 5A at 250V AC/DC, suitable for mains-powered protection circuits.
  • Compact form factor with 7cm lead wires for easy integration.
  • Reliable bimetallic disc actuator for snap-action, maintenance-free operation.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc thermostat housed in a metallic shell for effective heat transfer and mechanical protection. Its normally closed contacts remain conductive under normal operating temperatures, providing a continuous path for current. Upon reaching the calibrated trip temperature of 90°C, the bimetallic disc snaps open, breaking the circuit to prevent overheating in motors, transformers, or heating elements.

This switch is a cost-effective, single-use protector (non-resettable unless manually closed after cooling) designed for integration into appliance control boards, power adapters, and small industrial enclosures. Its sealed metallic housing ensures stable performance and resistance to environmental contaminants.

Key Features

  • Fixed temperature actuation at 90°C for precise overheat cutoff.
  • Metallic shell ensures rapid thermal response and physical robustness.
  • Snap-action bimetallic mechanism offers reliable, repeatable tripping.
  • 5A/250V rating provides robust switching capacity for protective circuits.
  • Pre-attached 7cm insulated lead wires simplify wiring connections.
  • Compact dimensions (approx. 9 x 7 x 1 cm) enable installation in tight spaces.
  • Maintenance-free operation with a high-value build for long-term reliability.

Applications

  • Over-temperature protection in AC/DC power supplies and battery chargers.
  • Safety cutoff for small motors, solenoids, and transformer windings.
  • Thermal management in household appliances like coffee makers, kettles, and hair dryers.
  • Preventing overheating in LED drivers, audio amplifiers, and electronic enclosures.
  • Integration into industrial control panels and HVAC equipment as a backup thermal fuse.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Item TypeThermal Protection Switch (Thermostat)
Contact ConfigurationNormally Closed (NC)
Setpoint (Trip) Temperature90°C
Rated Voltage250V AC/DC
Rated Current5A
Cable Length7 cm
Head Dimensions2 x 0.8 x 0.2 mm (Sensor Head)
Operating Temperature RangeUp to 90°C (Trip Point)
Actuator TypeBimetallic Disc
Housing MaterialMetallic Shell

Frequently Asked Questions

Is this KSD9700 switch normally open (NO) or normally closed (NC)?

This KSD9700/BK05-BB1D model is a Normally Closed (NC) thermal switch. The contacts are closed at room temperature, allowing current to flow. They open (break the circuit) only when the sensing head reaches its 90°C setpoint to provide over-temperature protection.

What is the maximum current and voltage this thermal switch can handle?

The switch is rated for 5 Amps at 250 Volts, either AC or DC. This rating is suitable for protecting mains-powered circuits or low-voltage systems with significant current draw. Do not exceed these ratings to ensure reliable operation and safety.

How do I install and wire this metallic shell temperature switch?

Mount the metallic sensing head directly onto or near the component you need to protect (e.g., a motor housing or heatsink) using thermal adhesive or a clip for good thermal contact. Solder or connect the two pre-attached 7cm lead wires in series with the load (e.g., the motor or heater) on the live or positive side of the circuit. Ensure the switch's rated voltage and current are not exceeded.

Does the switch reset automatically after it trips at 90°C?

No, this is a manual-reset bimetallic switch. Once the temperature rises to 90°C and the contacts snap open, the circuit remains broken. It will only close again after the unit cools down below the reset temperature (typically a few degrees below the setpoint) and is manually pressed or the mechanism is physically reset, depending on the exact design.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm