SKU: SENS-3669
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KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 65°C NC, 10A 250V

₹41.00 (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 calibrated temperature of 65°C (normally closed). Rated for 10A at 250V AC/DC, it provides reliable over-temperature protection for motors, transformers, power supplies, and heating elements.

Features

  • Precision snap-action bimetallic disc ensures reliable trip at 65°C (±5°C typical).
  • Rated for 10A resistive load at 250V AC/DC for robust circuit protection.
  • Durable metallic shell construction for effective heat transfer and mechanical durability.
  • Normally Closed (NC) configuration opens on temperature rise to cut power.
  • Compact design with integral 7cm lead wires for easy installation.

Out of stock

Description

The KSD9700/BK05-BB1D thermal switch utilizes a bimetallic disc mechanism housed in a metallic shell. When the ambient temperature reaches the factory-calibrated set point of 65°C, the disc snaps and physically opens the normally closed (NC) contacts, interrupting the current flow to the protected device. This mechanical action provides a failsafe, non-resettable method of over-temperature protection.

Its robust construction is suited for embedding in or mounting directly to heat-generating components like motor windings, transformer coils, or power electronic heatsinks. The metallic shell ensures rapid thermal response and long-term stability in demanding environments. After tripping, the switch remains open until the temperature drops significantly below the set point, allowing the protected system to cool before manual reset or replacement.

Key Features

  • Bimetallic snap-action mechanism for precise and repeatable temperature tripping.
  • High-current capacity: Handles up to 10A at 250V AC/DC for direct load switching.
  • Metallic housing provides excellent thermal conductivity and mechanical strength.
  • Normally Closed (NC) contact configuration for fail-safe power interruption.
  • Factory pre-set trip temperature with a typical tolerance of ±3-5°C.
  • Compact form factor (approx. 9 x 7 x 1 cm) for integration into tight spaces.
  • Includes pre-attached 7cm insulated lead wires for simplified wiring.

Applications

  • Over-temperature protection for AC/DC motors, fans, and pumps.
  • Thermal cutoff in power supplies, battery chargers, and transformers.
  • Safety interlock for heating elements in appliances (e.g., coffee makers, soldering irons).
  • Embedded thermal protection in power electronics and inverter heatsinks.
  • Preventive safety device in lighting ballasts and industrial control gear.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
FunctionTemperature Control Switch (Thermal Protector)
Contact ConfigurationNormally Closed (NC)
Trip Temperature65°C
Rated Voltage250V AC/DC
Rated Current10A
Housing MaterialMetallic Shell
Cable Length7 cm
Approx. Dimensions (L x W x H)9 x 7 x 1 cm
Approx. Weight0.03 kg

Frequently Asked Questions

What does 'Normally Closed (65C)' mean for this thermal switch?

The switch contacts are closed under normal, cool conditions, allowing current to flow. When the temperature at the switch's metallic shell reaches 65°C, the internal bimetallic disc snaps and physically opens the contacts, breaking the circuit to stop current flow and protect the connected device.

Can I use this switch to directly control a 120V AC heater drawing 8A?

Yes. The switch is rated for 10A at 250V AC, which is well above the 8A load at 120V AC. Ensure the heater's inrush current does not exceed the rating and that the switch is mounted in direct thermal contact with the component needing protection for accurate temperature sensing.

How do I reset the switch after it trips?

This is a non-resetting, one-time-use thermal fuse in a switch form factor. After it trips open at 65°C, it cannot be manually reset. The unit must be replaced to restore circuit continuity. It is designed for critical safety applications where automatic resetting could be hazardous.

What is the best way to mount this thermal switch for accurate sensing?

For optimal thermal response, firmly mount the flat metallic surface of the switch directly onto the component to be protected (e.g., motor casing, transformer winding, heatsink) using thermal adhesive, a clamp, or a screw. Ensure good mechanical and thermal contact. Avoid mounting in free air or near cooling fans.

Package Includes

  • 1 x KSD9700/BK05-BB1D Temperature Control Switch

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm