Class T (JJN/JLLN/A3T) Fuses

Class T (JJN/JLLN/A3T) Fuses

4.2 out of 5 Customer Rating
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Ships from supplier, typically 2-3 weeks.

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Model # 215113 Mfg # 5121
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A compact extremely fast-acting fuse ideal for protecting high amperage circuits

A fuses' ability to react to a detected in high amperage circuits is critical to their preservation. To effectively protect battery banks, inverters, and other high amperage circuits, fuses must trip instantly to save components connected to the circuit. Blue Sea Systems designed these Class-T fuses to have an extremely fast reaction to detected faults and offer the best possible protection. Class-T fuses and fuse blocks are compact and easy to install in tight spaces. Available in 110A-400A ratings, these fuses fit any Class-T fuse block . The 200A (5116) has been recently reintroduced to offer more tailored circuit protection. A high interrupt capacity allows these fuses to handle extremely high amperage before catastrophic failure.

Key Features

  • Extremely fast acting;
  • Silver plated blades for corrosion resistance and conductivity
  • Compact for installation in limited spaces
  • Compatible with Class-T fuse holders
  • Recommended by inverter manufacturers due to fast trip quality


  • Amperage: 110A—400A
  • Maximum Voltage: 160V DC
  • Interrupt Capacity: 20,000@160v dc
  • Approvals: UL Listed to Standard 248-15, DC tested to UL standard 198

Class-T fuse holders

Amperage 400 Amps
ISO Approved UL Listed for AC and DC
Mounting Hardware Fuse Holder (Sold Separately)
Type Fuses
Warranty Lifetime
Cancer and Reproductive Harm -