Fuse insert Etipo ETI Polam NH000/I 004191207 gG 25A 500V KOMBI industrial time-delay

The Etipo ETI Polam NH000/I gG 25A 500V KOMBI time-delay fuse insert is a slow-blow industrial NH fuse element designed to protect electrical circuits and equipment from overloads and short-circuits. Intended for mounting in NH fuse holders and switchgear, this gG characteristic fuse provides full-range protection for conductors and devices while allowing brief current surges without nuisance opening. The compact NH000/I size fits standard NH installations used in industrial, commercial and maintenance environments.

Advantages

This time-delay gG fuse insert delivers reliable, full-range protection for both overload and short-circuit conditions while accommodating temporary inrush currents thanks to its KOMBI slow-blow behavior. Its NH000/I form factor ensures compatibility with common NH fuse bases and switchgear, simplifying replacement and servicing. The construction and rated voltage make it suitable for higher-voltage circuits up to 500 V, offering a balance of selectivity and protection for motors, transformers and distribution circuits.

Suitable for

• Protection of industrial and commercial power distribution circuits
• Overload and short-circuit protection for motors and transformers with inrush currents
• Use in NH fuse holders and switchgear in maintenance and retrofit work
• Applications requiring coordinated protection and selectivity in three-phase systems

Key specifications

• Type: gG (general-purpose) time-delay (slow-blow) fuse element
• Rated current: 25 A
• Rated voltage: 500 V
• Form factor: NH000/I size for standard NH fuse bases
• Characteristic: KOMBI time-delay for inrush tolerance

How to use

Install the fuse insert into a compatible NH000/I fuse holder or switchgear compartment following the equipment manufacturer’s instructions and applicable safety procedures. Ensure the power is isolated and verified off before replacing or installing the fuse. Select the correct fuse rating and characteristic for the circuit to maintain coordination with upstream and downstream protective devices. After installation, check connections for secure contact and proper seating within the fuse holder.

Usage recommendations

Use this KOMBI time-delay gG fuse where temporary current surges occur, such as motor starts or transformer energising, and where full-range conductor protection is required. Verify coordination studies and ambient conditions to confirm the 25 A, 500 V rating is appropriate for the application. Replace only with identical form-factor and characteristic fuses to preserve system protection and selectivity.