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Lab Tested Blue Sea 400 Amp Class T Fuse 5121 Value Pack [0KAzjOwr]

$26.99 $86.99 -69%

Blue Sea Systems 400 Amp Class T Fuse 5121Provides fast response circuit protection for large inverter battery banks. 400 Amp class T replacement fuse Extremely fast short-circuit response 20,000 ampere interrupt capacity (AIC) UL listed to standard

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Lab Tested Blue Sea 400 Amp Class T Fuse 5121 Value Pack [0KAzjOwr]


Blue Sea Systems 400 Amp Class T Fuse 5121

Provides fast response circuit protection for large inverter battery banks.


  • 400 Amp class T replacement fuse

  • Extremely fast short-circuit response

  • 20,000 ampere interrupt capacity (AIC)

  • UL listed to standard 248-15

  • Maximum Voltage 160 Volts DC

  • Interrupt capacity 20,000 amperes DC

  • For use with Blue Sea Systems class T fuse block

What Our Customers Say

January 24, 2026

Absolutely no complaints!

A must-have gadget for pretty much everyone.

- Yara Y..

January 24, 2026

Absolutely no complaints!

This is a solid, five-star item.

- Thomas O..

January 24, 2026

Absolutely no complaints!

It's a simple, and elegant solution.

- Casey Z..

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