BOURNS SMD Thermal Cut Off Fuse, 25A, 28V, 72°C

The BOURNS SMD Thermal Cut Off Fuse provides reliable, miniature protection for sensitive electronic components and battery systems. Designed for surface-mount applications, this fuse offers critical overtemperature and overcurrent protection, specifically engineered for lithium polymer and prismatic cells. It operates by controlling abnormal or excessive current virtually instantaneously, helping to prevent damage and ensure safety in the event of a fault.

This component is part of the Komatsulite SA product range and is rated for 25A at 28V DC. It is engineered to function as a thermal cutoff (TCO) device, activating at a precise functioning temperature of 72°C to interrupt the circuit. Once the temperature falls below a minimum of 40°C, the fuse is designed to reset, allowing for system recovery without the need for manual replacement—ideal for applications where temporary fault conditions may occur.

With its compact SMD (Surface Mount Device) terminals, it is perfectly suited for modern, space-constrained PCB (Printed Circuit Board) designs. Its rapid response time makes it an essential safety component in power supplies, battery management systems, and various portable electronic devices where thermal runaway must be prevented.

Key Specifications:

• Current Rating: 25A
• Voltage Rating: 28V DC
• Functioning Temperature: 72°C
• Reset/Holding Temperature: 40°C (minimum)
• Terminal Type: SMD (Surface Mount)
• Product Range: Komatsulite SA
• Dimensions: 33mm (Width) x 43mm (Height) x 15mm (Depth)

By incorporating this BOURNS thermal cut-off fuse, designers can enhance the safety and reliability of their electronic products, providing robust protection against both thermal and current overloads in a single, efficient device.