IC60N Circuit Breaker 2P 3A Curve C

The Schneider Electric Acti9 iC60N A9F74203 miniature circuit breaker is a modular automatic breaker with 2 protected poles, 3 A and C tripping curve, designed to protect electrical circuits against overloads and short circuits. It offers a rated breaking capacity of 6 kA at 400 V AC according to IEC/EN 60898-1 and a high ultimate breaking capacity of 50 kA at 380-415 V AC according to IEC/EN 60947-2, together with Schneider Electric technologies such as VisiTrip, VisiSafe and Fast Closing.

Its low 3 A rating makes it especially useful for properly sized low-current circuits, while the bipolar configuration allows both poles to be opened and protected simultaneously. The modular format of 36 mm width makes installation on DIN rail easy in residential, commercial and professional electrical panels.

3 A bipolar miniature circuit breaker

Reference A9F74203 has 2 total poles and 2 protected poles. Both incorporate overcurrent protection, unlike 1P+N devices in which only the phase has thermal-magnetic protection.

Its rated current is 3 A, so it is intended for circuits whose design current and conductor cross-section are compatible with this rating.

Thermomagnetic protection against overloads and short circuits

The Acti9 iC60N uses thermomagnetic tripping technology, combining two operating principles:

• Thermal trip: protects against sustained overloads that can cause excessive heating of the conductors.
• Magnetic trip: acts quickly when a high short-circuit current occurs.

The combination of both functions makes it possible to protect the circuit against the main overcurrent situations using a single modular device.

C curve for loads with moderate inrush currents

The Schneider Electric A9F74203 incorporates a C tripping curve. For this reference, Schneider Electric specifies a magnetic threshold of 8 x In ±20 %.

The C curve provides a balance between fast short-circuit protection and the ability to withstand certain transient inrush currents without unnecessary tripping.

It can be used, provided the circuit calculation allows it, in applications such as:

• Control auxiliary circuits.
• Control and automation systems.
• Lighting.
• Electronic equipment.
• Small inductive loads.
• Signalling circuits.
• Low-consumption equipment.

6 kA breaking capacity according to IEC/EN 60898-1

According to IEC/EN 60898-1, Schneider Electric specifies for the A9F74203 a rated breaking capacity Icn of 6,000 A at 400 V AC.

The service breaking capacity Ics is also 6 kA, equivalent to 100% of Icn, under the conditions established by this standard.

Before installing the device, it must be checked that the prospective short-circuit current at the installation point does not exceed the applicable interrupting capacity.

Up to 50 kA according to IEC/EN 60947-2

A particularly notable feature of this low-rated reference is its high breaking capacity according to the industrial standard IEC/EN 60947-2.

• 12-133 V AC: Icu of 50 kA.
• 220-240 V AC: Icu of 50 kA.
• 380-415 V AC: Icu of 50 kA.
• 440 V AC: Icu of 25 kA.
• Up to 125 V DC: Icu of 10 kA.

At 380-415 V AC, Schneider Electric also specifies an Ics of 50 kA, equivalent to 100% of Icu.

Therefore, the 6 kA and 50 kA values that may be associated with this product are both correct, but they correspond to different standards and test conditions.

Limitation class 3

The Acti9 iC60N A9F74203 has limitation class 3 according to IEC/EN 60898-1.

This capability helps limit the energy flowing through the circuit during a short circuit, helping reduce the thermal and electrodynamic stresses borne by downstream cables and equipment.

VisiTrip for quick fault identification

The VisiTrip technology incorporates a red visual indicator that helps quickly identify the breaker that has tripped due to an electrical fault.

In panels with several circuits, this function makes diagnosis easier and can reduce the time needed to locate the affected line.

VisiSafe to confirm contact opening

The VisiSafe system uses a green indicator to show that the contacts are physically open, making it easier to check the circuit status before certain maintenance operations.

Schneider Electric also declares the A9F74203 suitable for isolation according to IEC/EN 60898-1 and IEC/EN 60947-2.

Fast Closing technology

The Fast Closing mechanism makes contact closing independent of the speed at which the user operates the handle.

This technology helps reduce contact wear during switching on and promotes a longer service life for the breaker.

500 V insulation voltage

Among the main electrical and dielectric characteristics of the A9F74203 are:

• Network frequency: 50/60 Hz.
• Rated insulation voltage Ui: 500 V.
• Rated impulse withstand voltage Uimp: 6 kV.
• Utilization category: A according to IEC/EN 60947-2.
• Overvoltage category: IV.
• Pollution degree: 3.

Compatible with AC and DC current

The Schneider Electric iC60N A9F74203 is specified for certain applications in both alternating current and direct current.

In direct current, Schneider Electric specifies operating voltages of up to 144 V DC for this reference, although the breaking capacity and connection conditions must be specifically verified according to the configuration used.

DIN rail mounting

The breaker is designed for clip-on installation on DIN rail, which makes it easy to mount alongside other modular protection and control devices.

It occupies:

• 4 x 9 mm modules.
• 2 standard 18 mm modules.
• Total width: 36 mm.

Compact dimensions

• Height: 85 mm.
• Width: 36 mm.
• Depth: 78.5 mm.
• Installation depth: approximately 44.5 mm.
• Weight: approximately 0.25 kg.
• Color: white.

Its compact format allows a complete bipolar protection to be installed using only two modules inside the electrical panel.

Terminals for conductors up to 25 mm²

The A9F74203 terminals accept different conductor cross-sections:

• Rigid conductor: from 1 to 25 mm².
• Flexible conductor: from 1 to 16 mm².
• Tightening torque: 2 Nm.

Connections must be made respecting the specified cross-sections and tightening torque to ensure a reliable electrical connection.

Compatible with auxiliaries and Vigi blocks

The Acti9 iC60 family allows the functions of the miniature circuit breaker to be expanded with compatible Schneider Electric accessories.

Depending on the configuration, it can be combined with:

• Auxiliary contacts.
• Trip signalling contacts.
• Auxiliary trip units.
• Remote control devices.
• Monitoring systems.
• Vigi residual current blocks.
• Comb busbars and distribution accessories.

Mechanical and electrical durability

Schneider Electric specifies a high service life for the Acti9 iC60N range:

• Mechanical durability: up to 20,000 cycles.
• Electrical durability: up to 10,000 cycles.

These features make the device suitable for panels subject to normal switching, disconnection, testing and maintenance operations.

IP20 protection rating

The miniature circuit breaker has an IP20 protection rating as a standalone device.

Once correctly installed in a suitable modular enclosure with class II insulation, the protection rating of the assembly can reach IP40, depending on the panel characteristics.

Wide temperature range

The Schneider Electric A9F74203 is designed to operate in:

• Operating ambient temperature: -35 to 70 °C.
• Storage temperature: -40 to 85 °C.

Its wide operating range makes it suitable for use in different indoor environments and technical panels within the conditions specified by Schneider Electric.

Technical characteristics of the Schneider Electric A9F74203

• Brand: Schneider Electric.
• Reference: A9F74203.
• Range: Acti9.
• Model: iC60N.
• Type: modular thermal-magnetic circuit breaker.
• Application: electrical distribution.
• Number of poles: 2P.
• Protected poles: 2.
• Rated current In: 3 A.
• Tripping curve: C.
• Tripping technology: thermomagnetic.
• Magnetic threshold: 8 x In ±20 %.
• Icn at 400 V AC according to IEC/EN 60898-1: 6 kA.
• Icu at 220-240 V AC according to IEC/EN 60947-2: 50 kA.
• Icu at 380-415 V AC according to IEC/EN 60947-2: 50 kA.
• Icu at 440 V AC according to IEC/EN 60947-2: 25 kA.
• Icu up to 125 V DC: 10 kA.
• Limitation class: 3.
• Frequency: 50/60 Hz.
• Network type: AC/DC.
• Ui: 500 V.
• Uimp: 6 kV.
• Utilization category: A.
• Overvoltage category: IV.
• VisiTrip: yes.
• VisiSafe: yes.
• Fast Closing: yes.
• Suitable for isolation: yes.
• Mounting: DIN rail.
• Modular width: 2 x 18 mm modules.
• Width: 36 mm.
• Height: 85 mm.
• Depth: 78.5 mm.
• Installation depth: approximately 44.5 mm.
• Weight: approximately 0.25 kg.
• Rigid conductors: 1-25 mm².
• Flexible conductors: 1-16 mm².
• Tightening torque: 2 Nm.
• Protection rating: IP20.
• Mechanical durability: 20,000 cycles.
• Electrical durability: 10,000 cycles.
• Operating temperature: -35 to 70 °C.
• EAN: 3606480080319.
• Standards: IEC/EN 60898-1 and IEC/EN 60947-2.

Compact bipolar protection for low-current circuits

The Schneider Electric Acti9 iC60N A9F74203 combines a 3 A rating, two protected poles and C curve in a compact device only 36 mm wide. Its thermomagnetic protection makes it possible to protect low-current circuits against overloads and short circuits and to disconnect both poles simultaneously.

The high breaking capacity of 50 kA at 380-415 V according to IEC/EN 60947-2, together with VisiTrip, VisiSafe, Fast Closing and the possibility of adding Acti9 accessories, makes it a particularly complete solution for auxiliary circuits and professional electrical panels.

Important: before installing the miniature circuit breaker, check that the 3 A rating, C curve, conductor cross-section and breaking capacity are suitable for the electrical characteristics and prospective short-circuit current of the circuit.