The NH00 is the smallest frame in the NH blade‑fuse family – and with 120 kA breaking capacity, the 3NA3814-7 handles fault currents that would destroy a standard NEOZED fuse. Rated 35 A gG for 500 V AC / 250 V DC, it is designed for feeder circuits in main distribution boards where short‑circuit levels close to the transformer can exceed 50 kA and the protection must open cleanly, without arc re‑ignition, every time.

Reliable Protection for Main Distribution

• gG operating class: protects cables and busbars against sustained overloads and high‑energy short circuits – the standard choice for feeder circuits and main distribution.
• 120 kA breaking capacity (AC 500 V): one of the highest interruption ratings in low‑voltage fuses, suitable for switchgear directly downstream of medium‑voltage transformers.
• 500 V AC / 250 V DC dual rating: covers standard three‑phase distribution and auxiliary DC control circuits with the same fuse type.

Design and Handling

• Ceramic body: withstands the extreme thermal shock of a 120 kA interruption and provides reliable arc extinction inside the barrel.
• Silver‑plated copper blades: maintain a stable, low‑resistance contact to the NH base over decades of service. Silver plating resists oxidation and fretting corrosion far better than bare copper.
• Top‑mounted blown‑fuse indicator: a clearly visible indicator on the top face shows whether the fuse has operated, speeding up fault‑finding in multi‑fuse panels.
• NH00 size: standard blade spacing and length, fits all NH00 fuse‑switch disconnectors and bases.

Technical Specifications