SKU: SENS-3643
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 160°C Normally Open, 5A 250V

₹34.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed to open a circuit at a fixed 160°C setpoint, rated for 5A at 250V AC/DC. It provides reliable over-temperature protection for motors, transformers, and power supplies.

Features

  • Fixed 160°C (±5°C) normally open (NO) thermal switch.
  • Rated for 5A at 250V AC/DC for robust circuit protection.
  • Durable metallic shell construction for mechanical strength and thermal conductivity.
  • Pre-calibrated snap-action bimetallic disc ensures precise, repeatable tripping.
  • Compact design with 7cm lead wires for easy integration into electrical enclosures.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal cutoff switch housed in a metallic shell. It operates on a snap-action principle: when the ambient temperature reaches its calibrated setpoint of 160°C, the internal bimetallic disc deforms rapidly, mechanically opening the normally open (NO) contacts to break the circuit. This action provides fail-safe protection against overheating.

Designed for direct series connection in a power line, this switch is pre-calibrated and non-resettable, meaning it remains open after tripping and must be replaced. Its metallic housing ensures excellent heat transfer from the protected component to the sensing element and offers durability in industrial environments. It is suitable for AC and DC applications up to its rated 250V and 5A limits.

Key Features

  • Fixed Temperature Protection: Precisely calibrated to trip at 160°C (±5°C tolerance) to prevent thermal damage.
  • Robust Electrical Rating: Handles up to 5A continuous current at 250V AC/DC for reliable circuit interruption.
  • Durable Metallic Housing: Provides excellent thermal conductivity for accurate sensing and protects the internal mechanism.
  • Snap-Action Mechanism: Ensures fast, positive contact opening for immediate circuit breakage upon reaching setpoint.
  • Normally Open Configuration: Circuit is closed during normal operation and opens upon over-temperature fault.
  • Compact & Lightweight: Minimal footprint and low weight for easy installation in space-constrained applications.
  • Pre-Calibrated & Sealed: Factory-set calibration ensures accuracy and is not user-adjustable.

Applications

  • Over-temperature protection for AC/DC motors, transformers, and solenoids.
  • Thermal safety cutoff in power supplies, battery chargers, and inverters.
  • Heating element protection in appliances like coffee makers, soldering irons, and hair dryers.
  • Preventive safety device in lighting ballasts and electronic control boxes.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Item TypeThermal Cutoff Switch (Thermal Protector)
Rated Voltage250V AC/DC
Rated Current5A
Operating Temperature (Trip Point)160°C
Contact ConfigurationNormally Open (NO)
Actuation TypeSnap-action, Bimetallic Disc
Reset TypeNon-resettable (One-time use)
Cable LengthApprox. 7 cm (leads)
Head DimensionsApprox. 2 x 0.8 x 0.2 mm (sensing head)
Housing MaterialMetallic Shell

Frequently Asked Questions

What is the trip temperature and tolerance of this thermal switch?

The KSD9700/BK05-BB1D thermal switch is factory-calibrated to trip (open the circuit) at a fixed temperature of 160°C. Typical manufacturing tolerance for such bimetallic switches is approximately ±5°C, meaning the actual trip point will fall within the range of 155°C to 165°C. This setpoint is not user-adjustable.

Is this switch resettable or does it need replacement after tripping?

This is a non-resettable, one-time-use thermal cutoff switch. Its operation is based on a snap-action bimetallic disc that permanently deforms upon reaching the 160°C setpoint, opening the circuit. Once it has tripped, the switch must be physically replaced to restore circuit functionality, which is a standard design for fail-safe protection.

What are the electrical ratings and how should I wire it?

The switch is rated for a maximum of 5 Amps at up to 250 Volts, AC or DC. It features a Normally Open (NO) contact configuration, meaning the circuit is completed (closed) under normal temperatures and broken (opened) when overheated. Wire it in series with the load (e.g., a motor or heating element) on the live or positive line to provide direct over-temperature protection.

Package Includes

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

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm