Blue Sea Class T Fuses – Fast-Acting Marine Fuse Protection

The Blue Sea Class T Fuse is the fuse system recommended by most inverter manufacturers for high speed response to short circuits.
Class T fuses are extremely fast-acting industrial fuses in a compact, space-saving size.
Class T fuses are also referred to as fast blow fuses or high speed fuses.

Key Features

• High speed fuse — no intentional time delay; opens very quickly on overload
• Available in capacities from 225 - 400 amperes
• 20,000 Ampere Interrupt Capacity (AIC) — a measure of the ability to interrupt currents without catastrophic failure
• Terminals are silver-plated for corrosion protection and increased conductivity
• The only UL 248-15L listed fuse commonly available in the marine industry
• DC tested to UL standard 198L
• Maximum voltage: 160V DC
• Space saving dimensions

Technical Specification

Why Choose Class T Fuses?

Class T fuses (also known as fast blow fuses or high speed fuses) are engineered for systems requiring instantaneous protection against short circuits. Their compact form and superior interrupting capacity make them a preferred choice for inverters, battery banks, and DC electrical systems in both marine and off-grid applications.

Common Applications

• Marine electrical systems
• Power inverters and converters
• Battery banks and charging systems
• Van and off-grid solar installations
• Industrial DC circuits