• Blue Sea 5119 300AMP Class T Fuse [5119]

Blue Sea 5119 300AMP Class T Fuse [5119]

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$82.79
$105.99
$82.79
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SKU: CWR-19026   UPC: 632085051198

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Class T fuses provide rapid overcurrent protection for high-current DC circuits in marine, RV, automotive, inverter, and battery-bank applications, helping limit damage during severe short-circuit events.

This Blue Sea Systems 5119 fuse is rated at 300 amps and uses a Class T configuration for extremely fast short-circuit response. Its 20,000-ampere interrupt capacity supports protection of high-energy DC systems, including large battery banks and inverter circuits. The fuse is UL listed to Standard 248-15 and DC tested to UL Standard 198L. Install it with a compatible Class T fuse block or holder.

  • 300-amp rating: Provides circuit protection for high-current DC electrical systems.
  • Class T fuse design: Responds extremely quickly to short circuits to help limit fault energy.
  • 20,000 AIC: Interrupts high fault currents in demanding battery and inverter installations.
  • UL 248-15 listed: Supports use in installations requiring a recognized Class T fuse standard.
  • DC tested to UL 198L: Provides verified suitability for direct-current circuit protection.
  • 3/8-inch stud mounting: Supports secure connection with compatible Class T fuse holders.

The Blue Sea Systems 5119 is a bolt-down 300-amp Class T fuse for high-current DC protection. It is suited to marine and RV electrical systems, automotive power equipment, inverters, and large battery banks where a fast response to short circuits is required.

Use the fuse with a compatible Class T holder, such as a holder designed for the 225–400 amp Class T range. The 20,000-ampere interrupt capacity is intended for systems where available short-circuit current can be substantial, while the fast-acting design helps interrupt faults before they can cause greater damage to connected wiring or equipment.

Confirm the fuse-holder rating, system voltage, cable sizing, terminal fit, and installation requirements before installation. This listing includes the 300-amp fuse; a compatible holder is required for mounting.

Specification Detail
Brand Blue Sea Systems
Model 5119
Product type Class T fuse
Amperage 300 A
Interrupt capacity 20,000 AIC
Maximum voltage 125 V DC
Stud size 3/8 in
Certifications/tests UL 248-15 listed; DC tested to UL 198L
SKU CWR-19026
UPC 632085051198
Weight 0.30 lb
  • What is the current rating?
    It is rated for 300 amps.
  • What type of fuse is this?
    It is a Class T direct-current fuse.
  • What is the interrupt capacity?
    The interrupt capacity is 20,000 amperes.
  • What fuse holder does it require?
    It requires a compatible Class T fuse holder rated for the fuse size and system voltage; Blue Sea holders for the 225–400 amp range are designed for this size range.
  • Where is it commonly used?
    Typical applications include marine, RV, automotive, inverter, and large battery-bank DC systems.
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Blue Sea 5119 300AMP Class T Fuse [5119]