Blue Sea 5502100 Class T Fuse Block

Blue Sea 5502100 — Class T Fuse Block 225-400A (with Cover)

Class T fuse block for high-current battery protection. If you're installing a 2000W+ inverter, this (or something like it) sits between your battery bank and your inverter's DC input. Required for code-compliant and insurance-compliant builds in most jurisdictions.

Key Features

• 225-400A Class T fuse compatible (fuse sold separately, size to your inverter's peak draw)
• Clear insulating cover — protects against accidental shorts and meets code requirements
• M8 studs for heavy battery cable connections (up to 4/0 AWG)
• Tin-plated copper bus — marine-grade corrosion resistance

Why You Need One

A short on an unfused battery cable can deliver thousands of amps in milliseconds — enough to start a fire or melt wiring before a breaker can trip. Class T fuses are the fastest-acting high-current fuses available. Non-negotiable for any inverter install over 2000W.

Pairs Well With

• Renogy 2000W / 3000W inverters
• Jackery HomePower 3600 Plus when building a custom 12V feed

Not sure what size inverter you need? Use our free Power Station Size Calculator to get a personalized recommendation in under 2 minutes. Then use the System Build Helper to plan where this Class T fuse fits in your wiring.