SKU: SENS-3662
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Generic KSD9700/BK05-BB1D 5A 250V Metallic Shell Temperature Control Switch (100C Normally Closed)

₹39.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal cutoff switch rated for 5A at 250V AC/DC. It operates as a normally closed (NC) switch that opens at its fixed 100°C set point, providing reliable over-temperature protection for electrical appliances, power supplies, and heating elements.

Features

  • Fixed 100°C (212°F) normally closed (NC) thermal cutoff switch.
  • Rated for 5A continuous current at up to 250V AC/DC.
  • Durable metallic shell construction for robust thermal conduction and mechanical protection.
  • Snap-action bimetallic disc mechanism ensures reliable, single-use operation.
  • Compact design with 7cm lead wires for easy integration into circuits and enclosures.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic thermal cutoff switch housed in a metallic shell for effective heat transfer and durability. It functions as a safety device in circuits where overheating must be prevented. The internal bimetallic disc is calibrated to snap open at precisely 100°C, permanently breaking the circuit to halt current flow and protect downstream components.

This switch is a one-time-use, normally closed (NC) device, meaning it remains conductive under normal operating temperatures but opens irreversibly upon reaching its trip point. Its 5A/250V rating makes it suitable for a wide range of low to moderate power AC/DC applications, from small appliances to power conversion equipment, ensuring compliance with essential thermal safety standards.

Key Features

  • Precision Thermal Protection: Calibrated bimetallic disc actuator opens reliably at the fixed 100°C set point.
  • Robust Electrical Rating: Handles up to 5 Amps at 250 Volts AC or DC for versatile circuit integration.
  • Durable Metallic Housing: Shell provides excellent thermal conductivity for accurate sensing and mechanical resilience.
  • Fail-Safe Normally Closed Design: Circuit remains closed during normal operation and opens permanently upon over-temperature fault.
  • Compact & Pre-Wired: Small footprint with integrated 7cm insulated lead wires for straightforward soldering or connection.
  • Single-Use Safety Device: Provides irreversible protection, ensuring a fault condition cannot be reset without replacement.

Applications

  • Over-temperature protection in AC/DC power supplies, battery chargers, and transformers.
  • Safety cutoff for heating elements in small appliances like coffee makers, soldering irons, and food warmers.
  • Thermal fault protection in motor windings, solenoids, and electromagnetic coils.
  • Integration into consumer electronics and lighting equipment to prevent fire hazards.
  • Backup safety device in industrial control panels and electrical enclosures.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Item TypeThermal Cutoff Switch (Thermal Protector)
Rated Voltage250V AC/DC
Rated Current5A
Operating Temperature (Trip Point)100°C (Normally Closed)
Switch ActionNormally Closed (NC), Snap-Action, One-Time-Use
Housing MaterialMetallic Shell
Cable Length7 cm (Leads)
Head Dimensions (approx.)2 x 0.8 x 0.2 mm (Sensor Head)

Frequently Asked Questions

Is this KSD9700 switch normally open (NO) or normally closed (NC), and is it resettable?

This KSD9700/BK05-BB1D switch is a normally closed (NC) device. It is a one-time-use, non-resettable thermal cutoff. Under normal temperatures below 100°C, the circuit is closed. Once the internal bimetallic disc senses 100°C, it snaps open permanently, breaking the circuit. It must be replaced after tripping.

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

The switch is rated for a maximum of 5 Amps at up to 250 Volts, which can be either AC or DC. This rating is for the continuous current it can carry before the temperature trip point is reached. Do not exceed these electrical limits.

How should I mount and connect this thermal cutoff switch for proper operation?

For accurate temperature sensing, the metallic shell of the switch must be in direct thermal contact with the component or surface you need to protect, typically using thermal adhesive or a mechanical clamp. The two 7cm lead wires can be soldered or connected with terminals directly into your circuit's power path.

Can I use this switch to control a device by cycling on and off at 100°C?

No. This is a safety cutoff device, not a cycling thermostat. It is designed for one-time, irreversible operation to prevent overheating hazards. Once it trips at 100°C, it remains open. For cyclic temperature control, you would need a resettable, snap-action thermostat.

Package Includes

  • 1 x KSD9700/BK05-BB1D 5A 250V Metallic Shell Temperature Control Switch (100C Normally Closed)

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm