MERSEN FUSE 500V 1-1/4A TD MIDGET FUSE ATQ1-1/4

Why Choose the Mersen ATQ1-1/4 Time-Delay Midget Fuse?

The Mersen ATQ1-1/4 is a high-performance time-delay midget fuse designed to provide dependable supplementary overcurrent protection for industrial control circuits, transformers, solenoids, motors and other electrical equipment. As part of the trusted Mersen Amp-Trap® ATQ series, it is engineered to withstand normal temporary inrush currents while providing reliable protection against sustained overloads and short circuit conditions.

Its time-delay characteristic helps minimise nuisance fuse operation during transformer energisation and motor starting, improving equipment uptime and reducing unnecessary maintenance. The compact 10 × 38 mm midget design allows straightforward installation into compatible fuse holders where panel space is limited.

With a rated current of 1.25 A, a 500 V AC voltage rating and a 10 kA AC interrupting rating, the Mersen ATQ1-1/4 is an excellent choice for supplementary protection where the available short-circuit current does not exceed 10,000 A. It is intended for supplementary protection only and is not suitable for branch circuit protection.

Key Advantages

• Time-delay operation accommodates normal equipment inrush currents.
• 1.25 A current rating for industrial control applications.
• 500 V AC voltage rating.
• 10 kA AC interrupting capacity.
• Helps reduce nuisance fuse operation during equipment start-up.
• Compact 10 × 38 mm midget construction for space-saving installations.

Key Features

• Mersen Amp-Trap® ATQ series.
• Time-delay midget fuse.
• 1.25 A ampere rating.
• 500 V AC rated voltage.
• Time-delay characteristic (approximately 12 seconds at 200% rated current).
• Ferrule terminals.
• 10 × 38 mm (13/32 in × 1-1/2 in) cylindrical construction.
• UL Listed, CSA Certified and RoHS compliant.

Reliable Time-Delay Protection for Industrial Equipment

The Mersen ATQ1-1/4 is specifically designed for supplementary protection of lighting circuits, transformers, motors, solenoids and industrial control equipment. Its time-delay design allows temporary inrush currents to pass without nuisance operation while delivering dependable protection against sustained overloads and fault currents.

The Amp-Trap® ATQ range offers a broad selection of current ratings, making it suitable for OEM machinery, industrial control panels and electrical assemblies requiring reliable supplementary overcurrent protection.

Typical Applications

• Industrial control panels.
• Control transformers.
• Lighting circuits.
• Solenoid circuits.
• Motor control circuits.
• Instrumentation equipment.
• OEM machinery.
• Supplementary circuit protection.