SKU: 61734758349

Class T Fuse Kit (400A) - for TITAN 460Ah & High-Current Installs

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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.

Class T fuse dimensioned drawing — Blue Sea 5112–5121
Trip-delay curve — Class T fuses
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 61734758349

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4.4 ★★★★★
Based on 30 reviews
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Product Reviews
L
Verified Purchase
Lgiff
Battle Creek, US
★★★★★ 5
This has been a challenge for my extreme chewer! The toy is winning
Color: Green
Indestructible? Not for my pitbull. Except on this toy. She has slowly chewed some of the outer portion on the backside, but it still has a lot of gnawing time left. This is her go-to toy now. she carries it nearly everywhere. She loves it. I am amazed at how well it is holding up. Within minutes, hours or a few days, the other "indestructible" toys I've purchased, never survived as described. This is a heavy toy! Not for the weak! I cannot stress enough the extreme chewer my dog is. Yet, I can see this toy lasting months. It won't be pretty then but it will most likely still be a favorite chew toy. I'm glad I found this and will be buying more. FYI's... 1) Chewability-5 stars 2) Softness-1 star, it's solid but chewable, 3) Bounce-0 stars, No bounce, it's heavy!, Playability- 5 stars. My dog plays with it, lets it lay with her when resting. Nearly always within her reach. She sleeps with it! That's love.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
M
Verified Purchase
Michele Johnson
Draper, US
★★★★★ 5
My buddy has been chewing on this for an hour!
Color: Green, Color: Green
This dog toy has been a great addition to our dog’s toy collection! My dog can be a pretty aggressive chewer, so I’m always looking for toys that are durable and can actually hold up to daily play. This one has been surprisingly tough and has lasted much longer than many other toys we’ve tried. The material feels strong and well made, and the design makes it easy for my dog to grip and chew. He loves carrying it around and tossing it during playtime. It’s also great for keeping him busy and helping reduce boredom, especially when he has extra energy to burn. Another thing I like is the texture of the toy. It seems to help keep my dog engaged, and it’s sturdy enough that I don’t worry about it falling apart right away like some softer toys do. It’s been used for chewing, tugging, and even some fetch around the house, and it’s still holding up really well. The only small drawback is that I wish it had a squeaker inside. My dog absolutely loves squeaky toys, and I think that would make it even more exciting and keep him interested for longer periods of time. Overall though, this is a very solid and durable dog toy that’s perfect for dogs that love to chew. If you’re looking for something tough that can help keep your dog entertained and reduce boredom, this is definitely worth try
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
E
Verified Purchase
Elizabeth Funderburg
Louisville, US
★★★★★ 5
Great Toy For Aggressive Chewers
Color: Green, Color: Green
My Boy loves it! It is a little heavy but it keeps him busy. Very strong and sturdy for aggressive chewing. We named it Ally the Alligator. He loves it definitely would recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
L
Verified Purchase
Larry
Draper, US
★★★★★ 4
Quality material and looks good.
Color: Green
Great chew toy for medium to large dogs. Seems to hold up to their chewing. Very heavy and could damage floors or furniture if your dog happens to throw it in the air.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
C
Verified Purchase
Cynthia Brann
Dallas, US
★★★★★ 5
Alligator chew toy
Color: purple, Color: purple
Excellent for heavy duty chewing. Good size for medium size (15-25lbs.). An instant hit with my dog. Very durable. I feel it is safe for my dog to have unsupervised. I rate this HIGHLY RECOMMEND.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026

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