About this product

The Blue Sea Systems A3T / Class T Fuse is a fast acting DC fuse range for high-amperage marine battery and inverter circuits where fault current can be severe. These Class T fuses are rated up to 125V DC with a 20,000A interrupt capacity at 125V DC, giving the circuit protection needed around large battery banks, including lithium-ion and TPPL installations.

This fuse range is used with Blue Sea Systems Class T fuse blocks and covers amperage options from 110A to 400A. It is a practical fit for boats with inverter systems, charging equipment, high-output DC distribution, and other battery-fed loads that need short-circuit protection close to the power source.

Key Features

• Class T fuse format for high-amperage DC circuit protection on marine electrical systems.
• 125V DC maximum voltage rating for use in DC battery and inverter circuits.
• 20,000A interrupt capacity at 125V DC for large battery banks with high available fault current.
• Fast short-circuit response suited to inverter feeds and other high-current electronics.
• Amperage range from 110A to 400A to match different cable sizes, loads, and fuse block configurations.
• Works with Blue Sea Systems Class T fuse blocks, with lower and higher amperage ranges using the matching block size.
• Commonly used for battery banks that include lithium-ion or TPPL batteries, where high interrupt capacity matters.