Bourns SMD Thermal Cut Off Fuse 12A 28V 77°C

The Bourns SMD Thermal Cut Off Fuse 12A 28V 77°C is a miniature, surface-mount protection device rated for 12A at 28V DC. It provides overtemperature and overcurrent protection for compact electronic assemblies, including battery management systems and power circuits.

Overview

Part of the Komatsulite SA product range, this thermal cut-off (TCO) is designed to interrupt the circuit at a functioning temperature of 77°C. It is intended to help safeguard sensitive components, particularly lithium polymer and prismatic cells, from risks associated with thermal runaway and electrical faults. The device responds to abnormal and excessive current, helping to prevent potential damage or hazardous situations.

Key Features

• Resettable operation: once the fault is cleared and the device cools below its holding temperature, it resets automatically without manual replacement
• Holding/reset temperature of 40°C (minimum)
• Surface-mount (SMD) design that supports automated assembly processes
• Compact form factor for space-constrained PCB layouts

Specifications

• Fuse current: 12A
• Voltage rating: 28V DC
• Functioning temperature: 77°C
• Dimensions: 43 mm (H) x 33 mm (W) x 15 mm (D)
• Weight: 0.05 grams

Applications

This fuse suits designers and engineers seeking resettable protection in DC applications, particularly where maintenance access is difficult or where continuous operation is required after a temporary fault.