Mersen NH2GG50V63 Sicherungseinsatz gG Gr.2 AC500V 63A sfü Kombikennmelder

In a busy industrial switchboard, an electrician replaces a blown NH fuse link in a motor control center. They need a component that can handle both overload and short-circuit conditions without nuisance tripping. The Mersen NH2GG50V63 is a size 2 NH fuse link with gG operating class, rated 63 A at 500 V AC. Its combined indicator shows at a glance whether the fuse has operated, speeding up troubleshooting and reducing downtime.

Key specifications

• Fuse type: NH fuse link, size NH2
• Operating class: gG (general purpose, full-range breaking capacity)
• Rated current: 63 A
• Rated voltage: 500 V AC
• Breaking capacity: 120 kA at 500 V AC
• Indicator: combined indicator
• Standards: IEC 60269-2, DIN VDE 0636-2
• Mounting: blade contact
• Body material: ceramic
• Contact material: silver-plated copper
• Power dissipation: 6.5 W at rated current
• Operating temperature: -5 °C to +40 °C

Why choose it

This fuse link provides reliable protection for cables, lines, and equipment in industrial and commercial installations. Its gG characteristic ensures full-range breaking capacity, covering both overload and short-circuit currents. The ceramic body offers high mechanical strength and thermal stability, while silver-plated copper contacts ensure low contact resistance and long service life. The combined indicator provides clear visual indication of operation, reducing maintenance time.

Ideal use cases

• Protection of motor feeders and distribution circuits in industrial plants
• Backup protection for smaller fuses or circuit breakers
• Protection of transformers, capacitor banks, and other equipment
• Use in NH fuse switch disconnectors and fuse bases

Good to know

The NH2 size is one of the most common NH fuse sizes, offering a good balance between current rating and physical dimensions. Always replace fuses with the same type and rating to maintain protection coordination. The fuse is designed for use in AC systems up to 500 V and complies with international standards, ensuring compatibility with standard NH fuse holders.