IC60N Circuit Breaker 3P 20A Curve D

The Schneider Electric Acti9 iC60N A9F75320 MCB is a modular 3-pole, 20 A circuit breaker with D tripping curve, designed to protect electrical circuits against overloads and short circuits. It offers a breaking capacity of 6 kA according to IEC/EN 60898-1 and 10 kA at 380-415 V AC according to IEC/EN 60947-2, combining electrical protection, easy diagnostics, and modular DIN rail mounting.

Thanks to its D curve, this circuit breaker is especially suitable for circuits with high inrush currents, such as certain motors, transformers, machinery, or equipment with strong switching surges. It also incorporates Schneider Electric VisiTrip and VisiSafe technologies to make trip identification easier and to visually verify the effective opening of the contacts.

20 A thermal-magnetic protection

The Schneider Electric A9F75320 integrates thermal and magnetic protection in a single device. Thermal protection acts against sustained overloads, while magnetic protection provides a fast response to high short-circuit currents.

Its rated current is 20 A and it has three protected poles, making it suitable for simultaneous protection of the three phases of a three-phase circuit.

D tripping curve for loads with high starting surges

The D curve is intended for applications where, during startup, transient currents considerably higher than the rated current may occur.

Schneider Electric specifies for this reference a magnetic trip threshold of 12 times the rated current, with a tolerance of ±20 %. This feature allows certain starting surges to be withstood without nuisance tripping, while still maintaining short-circuit protection.

Typical applications include:

• Electric motors with high starting current.
• Transformers.
• Industrial machinery.
• HVAC equipment.
• Circuits with inductive loads.
• Installations with strong transient inrush currents.

The choice of a D curve should always be made by checking the load characteristics, circuit impedance, and the installation’s disconnection conditions.

6 kA breaking capacity according to IEC 60898-1

According to IEC/EN 60898-1, the Acti9 iC60N A9F75320 has a rated breaking capacity of 6,000 A under the conditions specified by Schneider Electric.

This performance makes it possible to interrupt high-intensity short-circuit currents, provided that the prospective fault current at the installation point is within the device’s capabilities.

Up to 10 kA according to IEC 60947-2 at 380-415 V

For industrial applications in accordance with IEC/EN 60947-2, Schneider Electric specifies an ultimate breaking capacity Icu of 10 kA at 380-415 V AC.

The breaking capacity varies depending on the operating voltage:

• 12-133 V AC: Icu of 36 kA.
• 220-240 V AC: Icu of 20 kA.
• 380-415 V AC: Icu of 10 kA.
• 440 V AC: Icu of 6 kA.

The MCB must be selected by checking that its breaking capacity is equal to or greater than the prospective short-circuit current at the installation point.

VisiTrip technology to quickly identify the faulty circuit

The VisiTrip system includes a red mechanical indicator that makes it possible to visually recognize when the breaker has tripped as a result of an electrical fault.

This indication helps locate the affected circuit within the panel and can reduce the time needed for diagnostics and maintenance tasks.

VisiSafe to verify contact opening

The VisiSafe technology provides a visual indication through a green band that confirms the physical opening of the MCB contacts.

This feature improves safety during certain downstream maintenance operations and allows the device’s isolation status to be visually checked.

Suitable for industrial isolation

The Acti9 iC60N is designed to be suitable for industrial isolation or disconnection in accordance with IEC/EN 60947-2, within the conditions indicated by Schneider Electric.

This feature, combined with the VisiSafe indication, allows the breaker to be used both for protection and for certain circuit isolation functions.

Class 3 current limiting

The MCB has class 3 current limiting according to IEC/EN 60898-1. High current-limiting capability helps reduce the energy let through by the breaker during a short circuit, helping to limit thermal and electrodynamic stresses on downstream conductors and equipment.

Modular DIN rail mounting

The A9F75320 is designed for clip-on installation on a 35 mm DIN rail, making it easy to integrate into modular electrical panels.

Its width is 54 mm, equivalent to six 9 mm modules, so it occupies the space corresponding to three standard 18 mm modules.

The mounting system also allows compatible comb busbars to be used from either the top or the bottom.

Top or bottom supply

The Acti9 iC60N design allows electrical supply from the top or the bottom, providing flexibility during panel wiring.

This makes it easier to adapt the device to different distribution configurations and to the use of compatible comb busbars and distribution blocks.

Terminals for rigid and flexible conductors

The MCB terminals accept different conductor types and cross-sections:

• Rigid copper conductor: 1 to 25 mm².
• Flexible copper conductor: 1 to 16 mm².
• Flexible conductor with ferrule: 1 to 16 mm².
• Strip length: 14 mm.
• Tightening torque: 2 Nm.

Connections must be made in compliance with the cross-sections and tightening torques specified by Schneider Electric.

Compatible with auxiliaries and residual current protection

The Acti9 iC60 range allows the MCB to be complemented with various Schneider Electric accessories to expand its control, signaling, and protection functions.

Expansion options include:

• Auxiliary status contacts.
• Trip signaling contacts.
• Remote trip devices.
• Monitoring and control elements.
• Compatible Vigi residual current blocks.

This modularity makes it possible to configure protection adapted to the needs of residential, commercial, and industrial installations.

High mechanical and electrical durability

Schneider Electric specifies a mechanical durability of up to 20,000 cycles and an electrical durability of up to 10,000 cycles.

The quick-make mechanism is independent of the speed at which the lever is manually operated, a feature intended to improve contact durability and provide consistent switching.

IP20 protection

The device has an IP20 protection rating in accordance with IEC 60529. Once installed inside a suitable modular enclosure, Schneider Electric specifies a protection rating of up to IP40 for the corresponding assembly.

The breaker must be installed inside an appropriate panel or enclosure for the environmental conditions of the site.

Wide operating temperature range

The Acti9 iC60N can operate in an ambient temperature range from -35 to 70 °C. For storage, Schneider Electric specifies a range of -40 to 85 °C.

It also supports relative humidity of up to 95% at 55 °C and an operating altitude of up to 2,000 m within the conditions indicated by the manufacturer.

Technical characteristics of the Schneider Electric A9F75320

• Brand: Schneider Electric.
• Reference: A9F75320.
• Range: Acti9.
• Model: iC60N.
• Type: modular thermal-magnetic circuit breaker.
• Application: distribution circuit protection.
• Number of poles: 3P.
• Protected poles: 3.
• Rated current In: 20 A.
• Tripping curve: D.
• Tripping technology: thermal-magnetic.
• Magnetic trip threshold: 12 x In ±20 %.
• Breaking capacity according to IEC/EN 60898-1: 6 kA.
• Icu at 380-415 V AC according to IEC/EN 60947-2: 10 kA.
• Icu at 220-240 V AC: 20 kA.
• Icu at 440 V AC: 6 kA.
• Rated operational voltage: 12-440 V AC depending on configuration.
• Frequency: 50/60 Hz.
• Rated insulation voltage Ui: 500 V AC.
• Impulse withstand voltage Uimp: 6 kV.
• Current limiting class: 3.
• Utilization category: A according to IEC/EN 60947-2.
• Overvoltage category: IV.
• VisiTrip: yes.
• VisiSafe: yes.
• Suitable for isolation: yes.
• Mounting: 35 mm DIN rail.
• Width: 54 mm.
• Height: 85 mm.
• Depth: 78.5 mm.
• Net weight: approximately 0.375 kg.
• Mechanical durability: 20,000 cycles.
• Electrical durability: 10,000 cycles.
• Protection rating: IP20.
• Protection rating in modular enclosure: IP40.
• Operating temperature: -35 to 70 °C.
• Storage temperature: -40 to 85 °C.
• Standards: IEC/EN 60898-1 and IEC/EN 60947-2.

Protection for circuits with high starting currents

The Schneider Electric Acti9 iC60N A9F75320 combines a 20 A rated current with a D curve especially suitable for circuits that present high current surges during startup. Its three-pole configuration allows the three phases of a three-phase installation to be protected together.

The breaking capacity of 6 kA according to IEC 60898-1 and 10 kA at 380-415 V according to IEC 60947-2, together with VisiTrip and VisiSafe technologies, modular mounting, and the possibility of adding Acti9 accessories, make this MCB a versatile solution for professional electrical installations.

Important: before installing a D-curve MCB, verify that the rated current, conductor cross-section, prospective short-circuit current, and load characteristics are compatible with its tripping parameters.