Why Choose the Mersen ATQR12 Class CC Fuse?
The Mersen ATQR12 is a high-performance Class CC time-delay fuse designed to provide dependable overcurrent protection for control transformers, solenoids, contactors and other inductive electrical loads. As part of the established Mersen ATQR Amp-Trap® 2000 series, it combines current-limiting operation with excellent resistance to temporary start-up and transformer inrush currents.
The ATQR12 helps prevent unnecessary fuse operation during normal equipment energisation while responding rapidly to damaging short circuits and sustained overcurrent conditions. Its rejection-style Class CC construction also helps prevent the installation of incompatible fuse types when it is fitted within an appropriate Class CC fuse holder.
With a rated current of 12 A, a maximum voltage rating of 600 V AC and a DC rating of up to 300 V, this compact fuse is suitable for industrial control panels, machinery and automation systems. Its high interrupting capacity provides reliable protection in installations where substantial prospective fault currents may be present.
Key Advantages
- Compact Class CC time-delay fuse for industrial control circuits.
- 12 A rated current for transformers and inductive electrical loads.
- 600 V AC and 300 V DC voltage ratings for versatile industrial use.
- Time-delay performance withstands normal transformer and equipment inrush currents.
- Current-limiting construction helps reduce damaging fault energy.
- Rejection-style design helps prevent the installation of unsuitable replacement fuses.
Key Features
- Mersen ATQR Amp-Trap® 2000 series.
- 12 A rated current.
- 600 V AC maximum voltage rating.
- 300 V DC maximum voltage rating.
- Class CC rejection-style cylindrical fuse construction.
- Time-delay characteristic for inductive load protection.
- High interrupting capacity for demanding industrial circuits.
- Compact 10 × 38 mm format for space-efficient installation.
Control transformers and inductive devices can draw a temporary surge of current when they are first energised. The Mersen ATQR12 is designed to tolerate these normal inrush conditions, reducing nuisance fuse operation without compromising protection against sustained overloads and short circuits.
During a high-level fault, the fuse’s current-limiting construction restricts the amount of current and energy passing through the circuit. This helps protect transformers, conductors, contactors and downstream equipment while reducing the risk of extensive damage and unplanned production downtime.
Typical Applications
- Industrial control transformers.
- Solenoids, relays and contactors.
- Motor control centres and electrical panels.
- Machine tools and production machinery.
- Heating, ventilation and air-conditioning control circuits.
- OEM automation and industrial control systems.
