Sierra FS81080 Maxi Fuse Block for 30-80 Amp Maxi Fuses, 32 VDC

The Sierra FS81080 is a Maxi fuse block designed for marine and boat 12-volt and 24-volt DC electrical systems that use Maxi-style fuses rated from 30 to 80 amps. It accepts 18 to 4 AWG wire, with terminals that connect from either the sides or the bottom of the block, giving installers flexibility when running wire in tight panel spaces. The block is rated for a maximum voltage of 32 VDC and is built from reinforced polycarbonate, a material chosen for its resistance to corrosion and impact in a marine environment. A snap-on cover insulates the conductive terminals from accidental contact, helping the installation meet ABYC and USCG requirements. The FS81080 meets SAE J1171, the SAE standard for marine electrical devices. It is commonly used as a central distribution point for high-current circuits such as bilge pumps, windlasses, and battery feeds where a Maxi fuse is the appropriate overcurrent protection. Because it is a single-position block, one FS81080 protects one circuit; multiple blocks or a fuse block bank are used for boats with several high-current circuits. The compact housing measures 0.39 x 0.39 x 0.39 inches and weighs 0.26 pounds, making it easy to mount within existing electrical panels or battery compartments.

Specifications

• Brand: Sierra
• Manufacturer Part Number: FS81080
• Product Name: Maxi Fuse Block
• Category: Marine Fuse Blocks
• Fuse Type Accepted: Maxi fuses, 30-80 Amp
• Maximum Voltage: 32 VDC
• Wire Acceptance: 18-4 AWG, from sides or bottom
• Standard Met: SAE J1171
• Material: Reinforced polycarbonate
• Color: Black
• Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.26 pounds

Frequently Asked Questions

What size fuses does the Sierra FS81080 fuse block accept? It is built for Maxi-style fuses rated from 30 to 80 amps, the larger blade-style fuses used for high-current marine circuits.

What is the maximum voltage rating of this fuse block? The FS81080 is rated for a maximum of 32 VDC, suitable for standard 12-volt and 24-volt marine electrical systems.

What wire sizes can be connected to the FS81080? It accepts wire from 18 AWG up to 4 AWG, and terminals can be wired from either the sides or the bottom of the block.

What is the fuse block made of? The Sierra FS81080 is made of reinforced polycarbonate, a durable plastic chosen for its impact resistance in marine electrical panels.

Does the FS81080 meet marine safety standards? Yes, it meets SAE J1171, the SAE standard governing marine electrical and electronic devices, and its snap-on cover supports ABYC and USCG compliance for insulated conductive parts.

Is there a cover over the terminals? Yes, the FS81080 has a snap-on cover that insulates the conductive terminals from accidental contact.

How many circuits does one FS81080 fuse block protect? The FS81080 is a single-position Maxi fuse block, so it protects one circuit; boats needing multiple high-current circuits protected would use additional blocks.

What are the dimensions and weight of this fuse block? The Sierra FS81080 measures 0.39 x 0.39 x 0.39 inches and weighs 0.26 pounds.

What color is the FS81080 fuse block? It is black.

What typical marine circuits use a Maxi fuse block like the FS81080? High-current circuits such as bilge pumps, windlasses, and main battery feed lines typically use Maxi fuses in the 30 to 80 amp range that the FS81080 is designed to hold.