BOURNS Thermal Cut Off Fuse, 25A, 28V DC, 90°C

The BOURNS Thermal Cut Off Fuse is a high-current miniature protection device designed to provide overtemperature and overcurrent protection for demanding electronics applications. It is rated for 25A at 28V DC, making it an ideal component for safeguarding power circuits and sensitive battery assemblies.

This fuse functions as a critical safety component, controlling abnormal or excessive current virtually instantaneously. Its primary mechanism is temperature-activated; when the internal temperature reaches its functioning point of 90°C, the fuse trips, effectively breaking the circuit to prevent damage or potential thermal runaway. It requires the temperature to fall below its reset threshold of 40°C (minimum) before it can be restored to operation.

Part of the Komatsulite HC product range, this high-current type TCO (Thermal Cut-Off) is specifically engineered to protect lithium polymer and prismatic cells. Its robust construction and reliable blade terminals ensure a secure electrical connection and consistent performance. The compact design, with dimensions of 43mm in height, 33mm in width, and 15mm in depth, allows for integration into space-constrained assemblies.

Offering a dual-layer of safety against both excessive heat and current, this fuse is a fundamental component for engineers and designers building reliable, fail-safe battery management systems, power supplies, and other electronic devices where circuit protection is paramount. Its precision and reliability come from the trusted BOURNS brand, known for high-quality electronic components.

Key Specifications

• Protection Type: Overtemperature and overcurrent
• Rated Current: 25A
• Voltage Rating: 28V DC
• Functioning Temperature: 90°C
• Holding/Reset Temperature: 40°C (minimum)
• Product Range: Komatsulite HC
• Terminal Type: Blade
• Dimensions: 43mm (H)