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Description
Class T Fuse Kit (400A) - for TITAN 460Ah & High-Current Installs400A peak 320A continuous 125V DC 20kA AIC Ignition Protected Recommended for the TITAN 460Ah and any install with sustained currents above 250A. What's in the kit 1 Blue Sea 5502100 Class T Fuse Block (with insulating cover) 1 Blue Sea 5121 400A Class T Fuse Class T fuses have an extremely fast short circuit response and the highest interrupt capacity available in this size class 20,000A AIC, double the rating of an MRBF. The right choice for high
400A peak · 320A continuous · 125V DC · 20kA AIC · Ignition-Protected
Recommended for the TITAN 460Ah and any install with sustained currents above 250A.
What's in the kit
- 1 × Blue Sea 5502100 Class T Fuse Block (with insulating cover)
- 1 × Blue Sea 5121 400A Class T Fuse
Class T fuses have an extremely fast short-circuit response and the highest interrupt capacity available in this size class — 20,000A AIC, double the rating of an MRBF. The right choice for high-power inverters, large house banks, and any install where the cabling and BMS allow continuous discharge above 250A.
Why Class T over MRBF for the 460Ah
The TITAN 460Ah has a higher continuous discharge ceiling than our standard packs. A 300A MRBF can be the limiting factor — the Class T's 320A continuous (400A peak) headroom keeps the fuse out of the discharge path until something genuinely goes wrong.
Specifications
| Fuse rating | 400A peak / 320A continuous (300A inside engine spaces) |
| Maximum voltage | 125V DC (fuse) · 160V DC (block) |
| AIC (Interrupt capacity) | 20,000A @ 125V DC |
| Ignition-protected | Yes |
| Cable size | Up to 4/0 AWG |
| Terminal studs | M8 (5/16"-18) · stainless steel |
| Mounting | M6 / 1/4" hardware |
| Base material | UL 94-V0 (high-heat resistant) |
| Total weight | ~0.64 kg |
| Manufacturer | Blue Sea Systems (PN 5121 + 5502100) |
Spare parts available separately: Class T Fuse Block · Class T 400A Fuse
Technical reference
Drawings & curves sourced from Blue Sea Systems product documentation.
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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