KSD-01F Temperature Switch Thermostat Thermal Protector TO-220
KSD-01F Temperature Switch Thermostat Thermal Protector TO-220
KSD-01F Thermal Protector Temperature Switch – TO-220 Package
The KSD-01F Temperature Switch Thermostat is a compact, reliable bimetallic thermal protector designed for electronics, appliances, motors, and DIY projects requiring precise over-temperature control. With a wide operating range of 40°C to 150°C, this versatile component is available in both Normally Open (NO) and Normally Close (NC) configurations, making it suitable for a broad range of thermal management applications.
Housed in the industry-standard TO-220 package, it installs easily onto PCBs, heat sinks, or directly onto components that need temperature monitoring. Whether you're building a temperature-controlled circuit, protecting a motor winding, or adding thermal cutoff protection to a custom device, the KSD-01F delivers consistent and dependable performance.
Made in Mainland China.
Key Features
- Wide Temperature Range: 40°C – 150°C, available in multiple set-point options
- Normally Open & Normally Close: Choose the configuration that suits your circuit design
- TO-220 Package: Industry-standard form factor for easy integration and mounting
- Bimetallic Disc Design: Fast, automatic thermal response with no external power required
- Compact & Durable: Robust construction suitable for both prototyping and production use
- Automatic Reset: Returns to original state once temperature drops below the set threshold
- Versatile Applications: Motors, transformers, battery packs, PCB assemblies, home appliances, 3D printers, and more
Specifications
- Model: KSD-01F
- Temperature Range: 40°C to 150°C
- Package Type: TO-220
- Configuration: Normally Open (NO) / Normally Close (NC)
- Quantity: 1 piece
- Origin: Mainland China
What's in the Box?
- 1 × KSD-01F Thermal Protector Temperature Switch (TO-220)
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Frequently Asked Questions
Q: What is the difference between Normally Open (NO) and Normally Close (NC) on the KSD-01F temperature switch?
A: A Normally Open (NO) KSD-01F switch remains open (no current flow) at temperatures below the set point and closes (allows current) when the temperature reaches the threshold. A Normally Close (NC) switch does the opposite — it stays closed at lower temperatures and opens the circuit when the temperature rises to the set point. Choose NO for circuits that activate at high temperature, and NC for circuits that cut off power at high temperature (e.g. thermal protection).
Q: Can I use the KSD-01F thermostat switch in a 3D printer or motor winding application?
A: Yes. The KSD-01F in a TO-220 package is widely used in 3D printer hotend assemblies, motor winding protection, transformer thermal control, and battery pack management. Its compact size and flat mounting surface make it easy to attach directly to heat-generating components with thermal adhesive or a mounting clip.
Q: Does this thermal protector reset automatically?
A: Yes, the KSD-01F features automatic reset functionality. Once the temperature drops back below the rated set-point temperature, the bimetallic disc returns to its original position and the switch resets — no manual intervention required. This makes it ideal for continuous protection in automated systems.