







BLUE SEA SYSTEMS Class T Fuse Block with Insulating Cover
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BLUE SEA SYSTEMS Class T Fuse Block with insulating cover provides reliable, fast-acting circuit protection for inverters and sensitive electronics using Class T fuses (fuse sold separately). Common features across the product family include stainless steel studs and one-piece stainless flange nuts for corrosion resistance and high torque, tin-plated copper fuse mounting blocks, UL 94-V0 base material for heat resistance, and cover breakouts that allow wire access in any direction. The four-stud design provides ample access around the connecting stud to install large cable lugs without obstruction; supports cable sizes up to 4/0 AWG. Units are ignition protected when specified/when cover is secure and are available in multiple amperage ratings (examples shown across variants include 110–400A). Maximum voltage across the family is 160V DC. Fuse sold separately. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
- Fuse sold separately
- One-piece stainless flange nuts ensure safe and secure connections
- Stainless steel studs provide resistance to corrosion and high torque
- Stud design ensures secure fuse mounting even with high heat
- Cover breakouts allow wire access in any direction
- Insulating cover satisfies ABYC/USCG insulation requirements
- Four stud design provides ample access around connecting stud to install large cable lugs without obstruction from the fuse
- Voltage Max. Operating: 160V DC, Amps Max. Operating: 320A, Class T Fuses: 225A-400A, Mounting: 1/4" (M6) Screws, Terminal Stud Size: 3/8"-16 (M10)
Specifications:
| Materials & Construction | |
| Outer Material | Synthetic |
| Product Details | |
| Connector Type | Screw |
| Current Rating | 320 Amps |
| Fuse Type | Class T |
| Gauge | 4.0 |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Style | 320a |
| Type | Fuse Blocks |
| Voltage | 1.6E+2 Volts (DC) |
| Sizing & Dimensions | |
| Weight | 0.75 pounds |
| Technical Specifications | |
| Included Components | FUSE BLOCK CLASS T 225-400 AMP |
| Number of Items | 1 |
| Style Detail | 320a |
| Warranty | LIMITED WARRANTY |

