Why Choose the Mersen ATQR4 Class CC Time-Delay Fuse?
The Mersen ATQR4 is a high-performance Class CC time-delay fuse designed to provide reliable overcurrent protection for industrial control circuits, transformers and other inductive loads. Part of the established Mersen Amp-Trap 2000® ATQR series, this fuse combines time-delay operation with excellent current-limiting performance to protect valuable electrical equipment against overloads and short circuits.
The ATQR4 is engineered to withstand temporary inrush currents generated when transformers, contactors, solenoids and motors are energised. This helps prevent unnecessary fuse operation during normal equipment start-up while maintaining fast and dependable interruption when a genuine fault occurs.
With a 4 A current rating and voltage ratings of up to 600 V AC and 300 V DC, the Mersen ATQR4 is suitable for a wide range of industrial and commercial applications. Its compact Class CC format also helps panel builders save valuable enclosure space while achieving effective branch circuit protection.
Key Advantages
- Reliable Class CC time-delay fuse for industrial circuit protection.
- 4 A current rating suitable for control circuits and inductive loads.
- 600 V AC and 300 V DC voltage ratings for versatile installation.
- Time-delay operation helps withstand temporary start-up and transformer inrush currents.
- Current-limiting performance helps reduce equipment damage during short circuits.
- Compact construction supports space-efficient electrical panel designs.
Key Features
- Mersen Amp-Trap 2000® ATQR series.
- 4 A rated current.
- 600 V AC rated voltage.
- 300 V DC rated voltage.
- Class CC time-delay fuse design.
- High interrupting capacity for demanding fault conditions.
- Ferrule-style cylindrical construction.
- Suitable for branch circuit and industrial control protection.
Reliable Protection for Industrial Electrical Systems
The Mersen ATQR4 provides coordinated protection for circuits that experience brief but normal current surges during energisation. Its time-delay characteristic allows temporary inrush currents to pass without opening the circuit unnecessarily, making it particularly useful for control transformers and inductive equipment.
During overload or short-circuit conditions, the fuse interrupts the current to help limit thermal and mechanical stress on conductors, switching devices and connected machinery. Its Class CC rejection design also helps prevent the installation of unsuitable fuse types when used with compatible rejection fuse holders.
Typical Applications
- Industrial control panels.
- Control transformers.
- Motor control circuits.
- Contactors, relays and solenoids.
- Heating and ventilation equipment.
- OEM machinery and automation systems.
