Blue Sea Systems 5176B MRBF Terminal Fuse 40A

Blue Sea Systems 5176B MRBF Terminal Fuse 40A 58VDC Max

The Blue Sea Systems 5176B (also designated as PN 5176 / FLM-5 bulk packaging) is a 40 Amp Marine Rated Battery Fuse (MRBF) engineered for high-current DC main circuit protection directly at battery terminals. Operating at up to 58V DC, MRBF fuses provide extreme interrupt capacities (10,000 A at 14V DC) in a compact footprint, meeting stringent ABYC requirements for high-energy battery bank installations.

Designed for marine vessels, RVs, and commercial vehicles, the 5176B features an IP-rated ignition-protected housing (SAE J1171), making it safe for installation in gasoline engine bays and enclosed battery compartments. It features a clear inspection window for quick visual diagnosis of a blown fuse condition and requires an MRBF Terminal Fuse Block (e.g., Blue Sea PN 5191 or PN 2151) for mounting.

Key Features

• High Interrupt Capacity: Capable of safely breaking short-circuit currents up to 10,000 A on 12V battery banks.

• Ignition Protected (SAE J1171): Safe for installation on gasoline-powered boats, vehicle engine rooms, and tight battery compartments.

• Clear Inspection Window: Transparent window gives clear visual indication of blown fusible link status.

• Compact Battery-Adjacent Mounting: Mounts directly on battery posts via an MRBF fuse block, eliminating long un-fused cable runs.

Specifications