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⚡ Fuse your system with the fastest, toughest protection on the market!
The Blue Sea Systems 5121 FUSE A3T (Class T) 400 Amp fuse offers industry-leading fast short-circuit response and an impressive 20,000 Amp interrupt capacity. Designed for high-demand electrical applications, this compact and durable fuse ensures maximum safety and reliability, backed by a trusted brand and excellent customer ratings.





| ASIN | B000MMH1JO |
| Best Sellers Rank | #19,305 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Cartridge Fuses |
| Brand Name | Blue Sea Systems |
| Color | Black |
| Current Rating | 400 A |
| Customer Reviews | 4.7 4.7 out of 5 stars (176) |
| Global Trade Identification Number | 00632085051211 |
| Included Components | FUSE A3T (CLASS T) 400 AMP |
| Item Dimensions | 2 x 4 x 6 inches |
| Item Type Name | FUSE A3T (CLASS T) 400 AMP |
| Item Weight | 1.6 ounces |
| Manufacturer | Blue Sea Systems |
| Material Type | Plastic |
| Maximum Current | 400 A |
| Model | 5121 |
| Mounting Type | Durchsteckmontage |
| Number of Items | 1 |
| Part Number | 5121-BSS |
| Specification Met | Sea |
| UPC | 632085051211 |
| Unit Count | 1 Count |
| Voltage | 125 volts |
| Warranty Description | LIMITED WARRANTY |
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