Blue Sea Systems 5502 Class T Fuse Block, 320 Amp, 160 Volt DC

The Blue Sea Systems 5502 is a Class T fuse block built for high-current DC protection on boats, RVs, and battery-based power systems, including inverter installations. Class T fuses are the type most often recommended by inverter manufacturers because of their high speed response to short circuits, making this block a common choice for protecting inverter feed cables and other heavy-gauge circuits up to 320 amps at up to 160 volts DC.

The block uses a four stud design that provides ample access around the connecting stud, so large cable lugs can be installed without obstruction from the fuse itself. Stainless steel studs resist corrosion and hold up to high torque, while one-piece stainless flange nuts keep connections safe and secure. The stud design ensures the fuse mounts securely even under high heat, and the base is rated UL 94-V0 for resistance to high heat. A clear insulating cover satisfies ABYC/USCG insulation requirements, and cover breakouts allow wire to exit in any direction for flexible installation. Terminal studs are 3/8 inch-16 and accept ring terminals for wire up to 4/0 AWG. Note that the Class T fuse itself is sold separately.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 5502
• Current Rating: 320 Amps
• Voltage Rating: 160 Volts DC
• Terminal Stud Size: 3/8 inch-16
• Wire Size Capacity: Up to 4/0 AWG
• Mounting Type: Panel Mount
• Material: Stainless Steel
• Base Material Rating: UL 94-V0
• Dimensions: 3 x 9 x 7.25 inches
• Weight: 1.1 pounds
• Design: Four stud design
• Cover: Insulating cover, satisfies ABYC/USCG insulation requirements

Frequently Asked Questions

What is the amp rating of the Blue Sea Systems 5502 fuse block? The Blue Sea Systems 5502 is rated for 320 amps and is designed to accept Class T fuses in that range.

Does the 5502 fuse block include the fuse? No, the Class T fuse is sold separately from the 5502 fuse block.

What voltage is the 5502 fuse block rated for? The 5502 is rated for use on DC systems up to 160 volts.

What wire size can I use with the 5502 fuse block? The 5502 has 3/8 inch-16 terminal studs that accept ring terminals for wire up to 4/0 AWG.

Why do inverter manufacturers recommend a Class T fuse block like the 5502? Class T fuses provide a high speed response to short circuits, which is why the 5502 is the type most often recommended by inverter manufacturers for protecting heavy-gauge inverter cabling.

What is the four stud design on the 5502 for? The four stud design on the Blue Sea Systems 5502 gives ample access around the connecting stud so large cable lugs can be installed without the fuse getting in the way.

Is the 5502 fuse block covered for safety? Yes, the 5502 includes a clear insulating cover that satisfies ABYC/USCG insulation requirements, with breakouts that allow wire to exit in any direction.

What material are the studs and hardware made from on the 5502? The 5502 uses stainless steel studs for corrosion and torque resistance, along with one-piece stainless flange nuts for secure connections.

How much does the Blue Sea Systems 5502 fuse block weigh? The 5502 weighs 1.1 pounds.

What are the dimensions of the 5502 fuse block? The 5502 measures 3 x 9 x 7.25 inches.

How is the 5502 fuse block mounted? The 5502 is a panel mount fuse block.

What is the base of the 5502 fuse block rated for? The base of the 5502 is rated UL 94-V0 for resistance to high heat.