Fuse JJN (Class T) 250 Amp

Protect high-amperage DC electronics circuits with a Class T fuse built for fast short-circuit response. Rated for 250 Amp and certified for high interrupt capacity for DC applications.

Key Features

• Fast short circuit response helps protect high-amperage electronics equipment such as inverters.
• 20,000 Ampere Interrupt Capacity (AIC) UL rated for DC applications under UL189L.

Intended Use

• DC circuit protection for marine and RV power systems
• Inverter branch circuit protection (where a Class T fuse is specified)
• Battery bank and high-current electronics protection (with compatible Class T fuse blocks/holders)

Product Details

• Product: Fuse JJN (Class T) 250 Amp
• SKU/Item: 661-5118
• Class: Class T fuse (JJN series)
• Amperage rating: 250 Amp
• Interrupt capacity: 20,000 Ampere Interrupt Capacity (AIC)
• Regulatory rating: UL rated for DC applications under UL189L

Parts Desk Insights

Best Use Case: Use this Class T fuse when your system requires a very fast-acting, high-interrupt-capacity DC protection devicecommonly in inverter feed protection setups with a compatible Class T fuse block/holder.

Common Issues: If the fuse is repeatedly opening, verify the downstream wiring/load sizing and ensure the correct fuse amperage is selected for the system. Also confirm the fuse is installed in the correct Class T fuse holder/block for proper mounting and contact.

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