This LV Automotive 300A 32VDC Mega Fuse is the bit of gear you bolt in when a standard blade fuse will not cope with 300A loads. The fuse runs happily in high draw setups like winches or inverters at up to 32V DC, with a slow blow profile that handles start up surges. At about 68 mm long with 8.7 mm bolt holes, it drops straight into a typical Mega fuse holder or custom bar. The lugs are 19 mm wide with a conductive section of roughly 50 mm, so you get solid contact on heavy cable lugs without hot spots. Overall thickness sits near 10 mm with the centre block about 9.7 mm high, which keeps it low and tidy in tight bays. You get a slow blow 300 amp fuse that is a smart buy for anyone wiring serious 12 volt or 24 volt gear.

• LV Automotive 300A 32VDC Mega fuse
• Slow blow characteristic suits surge loads
• Ideal for high current winch or inverter feeds
• Bolt-on lugs with 8.7 mm holes
• Overall fuse length approximately 68 mm
• Conductive section length approximately 50 mm
• Fuse body section length approximately 29 mm
• Lug width approximately 19 mm for solid contact
• Overall thickness around 10 mm for low profile
• Suitable for 12V and 24V DC systems up to 32V

Q: Is this fuse suitable for both 12V and 24V systems?

Yes, as long as system voltage does not exceed 32V DC. Many 4WD and marine setups run at 12V or 24V, which both fall under this 32V rating. Current must still be limited to 300A continuous through the circuit. Always match the fuse to the cable size and expected load.

Q: What type of holder or connection does this mega fuse need?

This fuse uses bolt-on lugs with 8.7 mm holes. It suits Mega-style fuse blocks or direct mounting between bus bars with matching bolt hardware. Use flat washers and spring washers where possible to keep the joint tight. Ensure contact faces are clean to minimise resistance.

Q: When would I choose a slow blow fuse instead of a standard one?

Slow blow fuses suit circuits with short surge currents at start-up. Gear like winches and inverters can pull more than running current for a second or two. A slow blow element lets that surge pass without opening. A standard fast fuse might nuisance blow in the same setup.

Q: Can I oversize this fuse to stop it blowing on heavy loads?

No, the fuse rating must always protect the cabling. Choosing a higher rating than the cable can handle risks damage if a fault occurs. Work out your expected continuous current and cable capacity first. Then select the nearest fuse rating at or below the safe cable limit.