Why Choose the Mersen ATQR1 Time-Delay Fuse?
The Mersen ATQR1 is a 1 A Class CC time-delay fuse designed to provide reliable branch-circuit protection for industrial control systems, control transformers and other equipment subject to temporary inrush currents. Part of the Mersen Amp-Trap ATQR series, it combines current-limiting performance with a compact rejection-style cartridge design.
Rated at up to 600 V AC, the ATQR1 can withstand brief, non-damaging current surges produced when transformers, solenoids, relays and similar inductive loads are energised. Its time-delay characteristic helps reduce nuisance fuse operation while maintaining dependable protection against sustained overloads and short-circuit faults.
The ATQR1 uses the standard Class CC cartridge format and incorporates rejection-style dimensions that prevent installation in ordinary non-rejection fuse holders. When fitted in a correctly rated Class CC holder, it provides a compact and secure protection solution for control panels, machinery and industrial automation equipment.
Key Advantages
- Class CC branch-circuit protection for industrial electrical equipment.
- 1 A current rating for low-current control and transformer circuits.
- 600 V AC rating for demanding industrial applications.
- Time-delay performance helps tolerate temporary inrush currents.
- Current-limiting construction helps reduce fault energy reaching downstream equipment.
- Rejection-style body helps prevent the use of incorrectly classified replacement fuses.
Key Features
- Mersen Amp-Trap ATQR series.
- 1 A rated current.
- 600 V AC maximum voltage rating.
- Class CC time-delay fuse.
- Current-limiting operation.
- High interrupting capacity for industrial fault conditions.
- Ferrule-style cartridge terminals.
- Rejection feature for compatible Class CC fuse holders.
Control transformers can draw an initial magnetising current significantly higher than their normal operating current. The time-delay characteristic of the Mersen ATQR1 allows it to tolerate these brief start-up conditions while still responding to sustained overloads and damaging short circuits.
Its current-limiting construction can interrupt severe faults rapidly, helping reduce the thermal and mechanical stress placed on conductors, terminals and downstream components. This makes the ATQR1 particularly suitable for compact industrial panels where dependable fault protection and selective fuse replacement are important.
Typical Applications
- Industrial control transformers.
- Control panels and branch circuits.
- Relay and solenoid circuits.
- Motor-control auxiliary circuits.
- Industrial machinery and automation systems.
- Heating, lighting and process-control equipment.
