Why Choose the Mersen ATQR20 Class CC Fuse?
The Mersen ATQR20 is a compact and reliable Class CC time-delay fuse designed to protect control transformers, solenoids, contactors and other inductive electrical loads. As part of the proven Mersen Amp-Trap® 2000 ATQR series, it combines effective current-limiting protection with the ability to withstand temporary inrush currents during transformer energisation and equipment start-up.
Its time-delay operating characteristic helps prevent unnecessary fuse operation during normal start-up conditions while providing rapid interruption of damaging short circuits and sustained overcurrents. The Class CC rejection-style construction also helps prevent incompatible fuse types from being installed when the ATQR20 is used with a suitable Class CC fuse holder.
With a rated current of 20 A, an AC voltage rating of 600 V and a DC voltage rating of 300 V, the ATQR20 is suitable for industrial control panels, electrical distribution systems and automated machinery. Its compact ferrule format supports space-efficient installation, while its high interrupting capacity provides dependable protection in demanding industrial environments.
Key Advantages
- Compact Class CC time-delay fuse for industrial control circuits.
- 20 A rated current for control transformers and inductive loads.
- 600 V AC and 300 V DC voltage ratings for versatile industrial applications.
- Time-delay operation 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 Amp-Trap® 2000 ATQR series.
- 20 A rated current.
- 600 V AC maximum voltage rating.
- 300 V DC maximum voltage rating.
- Class CC rejection-style ferrule construction.
- Time-delay characteristic for inductive load protection.
- 200 kA AC interrupting capacity.
- Compact cylindrical body for space-efficient panel installation.
Control transformers, solenoids and similar inductive devices can draw a temporary surge of current when first energised. The Mersen ATQR20 is designed to tolerate these normal inrush currents, helping reduce nuisance fuse operation while maintaining dependable protection against sustained overloads and short circuits.
During a high-level electrical fault, its current-limiting construction restricts the peak current and energy passing through the circuit. This helps protect transformers, conductors, contactors and downstream control 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.
- Branch circuits in electrical distribution systems.
- Machine tools and automated production machinery.
- OEM machinery and industrial automation systems.
