SKU: SENS-3678
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 140°C NC, 10A 250V

₹67.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed for reliable over-temperature protection in electrical appliances and industrial equipment. It features a normally closed (NC) contact that opens at its calibrated 140°C set point, rated for 10A at 250V AC/DC.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • Normally closed (NC) contact opens at 140°C (±5°C) set point to cut power.
  • High current rating of 10A at 250V AC/DC for direct load switching.
  • Snap-action bimetallic disc mechanism ensures fast, reliable trip and reset.
  • Compact design with integrated 7cm lead wires for straightforward installation.

Out of stock

Description

The KSD9700 series is a bimetallic disc thermostat where a calibrated metal disc snaps at its set temperature, physically opening or closing the electrical contacts. This specific model is a normally closed (NC) type, meaning the circuit is complete under normal conditions and opens upon reaching 140°C to interrupt current flow and protect the system.

Housed in a metallic shell for excellent heat transfer and mechanical strength, this thermal switch is suited for embedding into motors, transformers, power supplies, and heating elements. Its snap-action design provides a clear, audible click, ensuring positive contact operation and hysteresis for stable cycling without chatter.

Key Features

  • Bimetallic snap-disc actuator for precise and repeatable temperature response.
  • Rugged metallic housing ensures accurate sensing and long-term reliability.
  • High-breaking-capacity contacts rated for 10A resistive loads at 250V.
  • Normally closed (NC) configuration for fail-safe over-temperature cutoff.
  • Integrated 7cm insulated lead wires (approx. 2mm diameter) for easy connection.
  • Compact form factor (approx. head dimensions 2mm) for space-constrained installations.
  • Wide operating temperature range up to the calibrated trip point of 140°C.
  • Optimized performance-to-cost ratio for mass-produced consumer and industrial appliances.

Applications

  • Over-temperature protection in AC/DC motors, transformers, and solenoids.
  • Safety cutoff for heating elements in coffee makers, soldering irons, and food warmers.
  • Thermal management in power supplies, battery chargers, and LED drivers.
  • Appliance safety interlock for hair dryers, space heaters, and electric blankets.
  • Industrial equipment thermal monitoring in control cabinets and machinery.

Technical Specifications

Manufacturer Part NumberKSD9700/BK05-BB1D
Switch TypeBimetallic Temperature Control (Thermostat)
Contact ConfigurationNormally Closed (NC)
Trip Temperature (Set Point)140°C
Rated Voltage250V AC/DC
Rated Current10A
Housing MaterialMetallic Shell
Cable Length7 cm
Head Dimensions (Approx.)2 x 0.8 x 0.2 mm
Operating PrincipleSnap-Action Bimetallic Disc

Frequently Asked Questions

What is the electrical rating and contact state of this KSD9700 switch?

This KSD9700/BK05-BB1D switch is rated for 10 Amperes at 250 Volts AC or DC. It features a Normally Closed (NC) contact configuration, meaning the circuit is closed under normal operating temperatures and opens when the sensing element reaches its 140°C trip point to break the circuit.

How does the bimetallic snap-action mechanism work?

The switch uses a calibrated bimetallic disc that deforms as temperature increases. At the precise set point (140°C), the disc rapidly snaps to the opposite curvature, physically moving a contact spring to open the electrical circuit. This snap-action provides a clear, fast break with inherent hysteresis, preventing contact chatter during temperature fluctuations near the trip point.

What are typical mounting and wiring considerations for this thermal switch?

The metallic shell should be in good thermal contact with the component or surface being monitored, often secured with adhesive, a clamp, or a mounting bracket. The integrated 7cm insulated leads can be connected directly in series with the load or control circuit. Ensure the operating environment's temperature profile allows for proper heat transfer to the switch's sensing head.

Package Includes

  • 1 x KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (140°C NC)

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm