Why Choose the Mersen ATQR1-1/4 Class CC Fuse?
The Mersen ATQR1-1/4 is a compact, current-limiting Class CC time-delay fuse designed to protect control transformers, solenoids, contactors and other inductive electrical equipment. As part of the trusted Mersen ATQR series, this fuse combines reliable short-circuit protection with the ability to withstand the temporary current surges associated with transformer energisation.
Its time-delay operating characteristic helps prevent unnecessary fuse operation during normal inrush conditions while providing a rapid response to damaging short circuits. The fuse’s rejection-style Class CC construction also helps prevent the installation of incompatible fuses when it is used with an appropriate Class CC fuse holder.
With a rated current of 1.25 A, an AC voltage rating of 600 V and a DC voltage rating of up to 300 V, the ATQR1-1/4 is suitable for demanding industrial control circuits. Its compact cylindrical format enables space-efficient installation within control panels, machinery and automation equipment.
Key Advantages
- Compact Class CC time-delay fuse for industrial control circuits.
- 1.25 A current rating for low-current equipment and transformer protection.
- 600 V AC and 300 V DC voltage ratings for versatile circuit protection.
- Time-delay performance withstands temporary transformer and inductive-load inrush currents.
- Current-limiting operation helps reduce damaging fault energy.
- Rejection-style design helps prevent the use of incorrectly rated replacement fuses.
Key Features
- Mersen ATQR time-delay fuse series.
- 1.25 A rated current.
- 600 V AC maximum voltage rating.
- 300 V DC maximum voltage rating.
- Class CC rejection-style cylindrical fuse construction.
- High interrupting capacity for industrial fault protection.
- Time-delay characteristic suitable for control transformers.
- Compact body for installation in space-constrained control panels.
Control transformers can draw a temporary surge of current when they are first energised. A time-delay fuse such as the Mersen ATQR1-1/4 is designed to tolerate this normal inrush current without compromising protection against sustained overloads and high-level short circuits.
The fuse’s current-limiting construction restricts the amount of fault current and energy that can pass through the circuit during a short circuit. This helps protect transformers, wiring and downstream control components while reducing the potential for equipment damage and extended production downtime.
Typical Applications
- Industrial control transformers.
- Solenoids, relays and contactors.
- Motor control centres and control panels.
- Machine tools and automated production equipment.
- Heating, ventilation and air-conditioning control circuits.
- Industrial machinery and OEM electrical systems.
