Thermal-Magnetic Protection:
Provides two levels of protection:
Thermal protection for overloads, preventing overheating.
Magnetic protection for short circuits, offering rapid disconnection to prevent system damage.
D Curve Tripping Characteristic:
Designed for inductive loads such as motors, transformers, and other devices that experience inrush currents during startup.
It allows a higher tolerance for short-term overcurrents (up to 10-14 times the rated current) compared to other curve types (e.g., B or C curves).
High Breaking Capacity:
The A9F55120 has a breaking capacity of 10 kA (IEC/EN 60898-1) and 15 kA (IEC/EN 60947-2), ensuring safe disconnection in case of a fault.
Suitable for residential, industrial, and commercial environments where high fault currents are expected.
VisiTrip Indicator:
The red mechanical indicator on the front of the breaker shows if the breaker has tripped, allowing for quick identification of faults and easy troubleshooting.
Compact Design:
With a width of just 18mm per pole, the A9F55120 is designed to save space on DIN rail installations, making it an ideal solution for crowded electrical panels.
UPS Systems: Ideal for protecting backup power systems against overload and short-circuit faults.
| Specification |
Details |
| Model |
A9F55120 |
| Type |
Single Pole (1P) |
| Rated Current |
20 Amps |
| Tripping Curve |
D Curve |
| Rated Voltage (AC) |
240V |
| Rated Voltage (DC) |
72V |
| Breaking Capacity (IEC/EN 60898-1) |
10 kA |
| Breaking Capacity (IEC/EN 60947-2) |
15 kA |
| Mounting Type |
DIN Rail (35mm standard rail) |
| Terminal Type |
Double tunnel (for secure wire connection) |
| Protection Class |
IP20 (Protected against solid objects >12mm) |
| Electrical Endurance |
10,000 cycles |
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