Why Choose the Mersen ATDR20 Class CC Fuse?
The Mersen ATDR20 is a compact and dependable Class CC time-delay industrial fuse designed to protect motor circuits, transformers, control equipment and industrial machinery against overloads and short-circuit faults. As part of the established Mersen Amp-Trap 2000® ATDR series, it combines current-limiting performance with the ability to withstand temporary start-up currents.
The ATDR20 is particularly suitable for circuits containing motors, transformers, solenoids and other inductive equipment that can draw a high initial current during energisation. Its time-delay operating characteristic helps prevent unnecessary fuse operation during normal start-up while providing effective protection against sustained overloads and severe electrical faults.
With a rated current of 20 A, an AC voltage rating of 600 V and a DC voltage rating of 300 V, the ATDR20 is suitable for demanding industrial power and control applications. Its compact rejection-style construction enables installation in compatible Class CC fuse holders while helping prevent substitution with incorrectly rated fuse types.
Key Advantages
- Compact Class CC time-delay fuse for industrial circuit protection.
- 20 A current rating suitable for motors and industrial equipment.
- 600 V AC and 300 V DC voltage ratings.
- Time-delay performance accommodates temporary equipment inrush currents.
- Current-limiting operation helps reduce damaging fault energy.
- Rejection-style design supports correct fuse selection and installation.
Key Features
- Mersen Amp-Trap 2000® ATDR fuse series.
- 20 A rated current.
- 600 V AC rated voltage.
- 300 V DC rated voltage.
- Class CC current-limiting fuse construction.
- Time-delay characteristics for motor and transformer loads.
- High interrupting capacity for demanding fault conditions.
- Compact cylindrical body with rejection-style ferrules.
Reliable Protection for Motors and Industrial Equipment
Time-delay fuses such as the Mersen ATDR20 allow temporary inrush currents to pass without opening the circuit unnecessarily. This is especially important for motors, transformers and electromagnetic equipment that may draw several times their normal operating current during start-up.
During a short circuit, the ATDR20 provides current-limiting operation that helps reduce the peak current and electrical energy reaching downstream equipment. This can minimise thermal and mechanical damage to conductors, contactors, motor controllers and other valuable industrial components.
Typical Applications
- Industrial motor branch circuits.
- Control transformers and power supplies.
- Motor control centres and control panels.
- Industrial machinery and production equipment.
- Heating, ventilation and air-conditioning systems.
- OEM automation and machine-building applications.
