IK60N Circuit Breaker 3P 20A Curve C

The Schneider Electric Acti9 iK60N A9K17320 miniature circuit breaker is a modular 3-pole, 20 A, C-curve automatic switch designed to protect three-phase electrical circuits against overloads and short circuits. It features a 6 kA breaking capacity according to EN/IEC 60898-1 and uses thermomagnetic trip technology, providing a compact and reliable solution for distribution switchboards.

This circuit breaker belongs to the Schneider Electric Acti9 iK60N range and is designed for modular installation on DIN rail. Its C curve makes it especially suitable for general-purpose loads that may present moderate inrush currents during connection.

20 A three-phase miniature circuit breaker

The Schneider Electric A9K17320 has 3 protected poles, allowing the three phases of a three-phase circuit to be disconnected and protected simultaneously. Its rated current is 20 A at 30 °C.

This configuration makes it suitable for three-phase distribution and supply lines for loads, provided that the rated current, conductor cross-section and load characteristics are compatible with the selected protection device.

Thermomagnetic protection against overloads and short circuits

The Acti9 iK60N combines two protection systems in a single device:

• Thermal protection: acts against sustained overloads that can cause excessive heating of the conductors.
• Magnetic protection: provides a fast response to high currents caused by a short circuit.

The combination of both protections allows the circuit to be automatically disconnected when electrical conditions occur that could damage the wiring or connected loads.

C curve for general-purpose applications

The A9K17320 incorporates a C tripping curve. Schneider Electric specifies a magnetic operating threshold between 5 and 10 times the rated current.

This feature allows certain current peaks during load connection without causing unnecessary tripping, while still maintaining a fast response to short circuits.

The C curve is commonly used in distribution circuits, small electrical equipment, lighting and other loads with moderate starting currents. Final selection should be made according to the specific characteristics of the circuit.

6 kA breaking capacity

The Schneider Electric iK60N A9K17320 miniature circuit breaker offers a rated breaking capacity Icn of 6,000 A in accordance with EN/IEC 60898-1.

Schneider Electric also specifies a service breaking capacity Ics of 6 kA, equivalent to 100% of Icn under the conditions indicated by the manufacturer.

To select the correct breaker, it must be verified that the breaking capacity is suitable for the prospective short-circuit current at the installation point.

Suitable for isolation

The Schneider Electric Acti9 iK60N is declared suitable for isolation or disconnection functions in accordance with EN/IEC 60898-1.

This feature allows the miniature circuit breaker to be used to isolate the protected circuit within the conditions specified by the manufacturer and applicable regulations.

Current limiting class 3

The A9K17320 has a current limiting class 3 in accordance with EN/IEC 60898-1.

This current limiting capability helps reduce the energy passing through the circuit during a short circuit, helping to reduce thermal and electrodynamic stress on conductors and other downstream components.

400 V rated voltage for three-phase circuits

This miniature circuit breaker is intended for AC networks and has a rated voltage of 400 V, with a mains frequency of 50/60 Hz.

Its main insulation characteristics include:

• Rated insulation voltage Ui: 440 V AC.
• Rated impulse withstand voltage Uimp: 4 kV.
• Overvoltage category: III.

Modular DIN rail mounting

The Schneider Electric A9K17320 is designed to be installed by clip-on mounting on DIN rail, making it easy to integrate into modular electrical panels.

It occupies 3 standard 18 mm modules, with a total width of 54 mm. Its modular construction allows it to be installed alongside residual current devices, contactors, surge protectors and other installation devices.

Compact dimensions for electrical panels

• Height: 85 mm.
• Width: 54 mm.
• Depth: 78.5 mm.
• Module width: 3 modules of 18 mm.
• Net weight: approximately 300 g.
• Color: white.

Its compact format makes it easy to optimize the available space inside residential, commercial and small professional distribution boards.

Top or bottom connection

The tunnel terminals allow connection from the top or bottom of the miniature circuit breaker, providing flexibility during wiring.

• Rigid conductors: 1 to 25 mm².
• Flexible conductors: 1 to 16 mm².
• Strip length: 14 mm.
• Tightening torque: 2 Nm.

Connections must be made using compatible conductor sizes and respecting the tightening torque specified by the manufacturer.

Visual status indication

The breaker features a local ON/OFF indication through the position of its operating lever. This makes it easy to quickly check the circuit status from the electrical panel.

It also supports a padlock locking device to prevent certain operations when installation maintenance conditions require it.

Mechanical and electrical durability

Schneider Electric specifies a high service life for the Acti9 iK60N mechanism:

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

These characteristics make the device suitable for electrical panels subject to regular switching and maintenance operations.

IP20 protection

The miniature circuit breaker has an IP20 protection rating in accordance with IEC 60529. It is designed to be installed inside a suitable enclosure or electrical cabinet that provides the necessary protection against the environment and access to live parts.

In a suitable modular enclosure, a higher protection rating may be achieved for the assembly, depending on the characteristics of the panel used.

Wide operating temperature range

The Schneider Electric A9K17320 is designed to operate in an ambient temperature range of -25 to 60 °C. For storage, the manufacturer specifies temperatures between -40 and 85 °C.

These characteristics allow it to be used in a wide variety of indoor electrical panels, always within the environmental and installation conditions established.

Technical characteristics of the Schneider Electric A9K17320

• Brand: Schneider Electric.
• Reference: A9K17320.
• Range: Acti9.
• Model: iK60N.
• Type: modular thermomagnetic circuit breaker.
• Application: electrical distribution.
• Number of poles: 3P.
• Protected poles: 3.
• Rated current: 20 A at 30 °C.
• Tripping curve: C.
• Trip technology: thermomagnetic.
• Magnetic threshold: 5-10 x In.
• Breaking capacity Icn: 6 kA according to EN/IEC 60898-1.
• Service breaking capacity Ics: 6 kA, 100% of Icn under specified conditions.
• Limiting class: 3.
• Network type: AC.
• Rated voltage: 400 V AC.
• Frequency: 50/60 Hz.
• Rated insulation voltage Ui: 440 V AC.
• Rated impulse withstand voltage Uimp: 4 kV.
• Overvoltage category: III.
• Suitable for isolation: yes.
• Operating mechanism: lever.
• Local indication: ON/OFF.
• Mounting: clip-on DIN rail.
• Module width: 3 modules of 18 mm.
• Width: 54 mm.
• Height: 85 mm.
• Depth: 78.5 mm.
• Weight: approximately 300 g.
• Terminal for rigid conductor: 1-25 mm².
• Terminal for flexible conductor: 1-16 mm².
• Strip length: 14 mm.
• Tightening torque: 2 Nm.
• Protection rating: IP20.
• Mechanical durability: 20,000 cycles.
• Electrical durability: 10,000 cycles.
• Operating temperature: -25 to 60 °C.
• Storage temperature: -40 to 85 °C.
• Standard: EN/IEC 60898-1.
• Certification: AENOR.

Compact three-phase protection for distribution boards

The Schneider Electric Acti9 iK60N A9K17320 miniature circuit breaker combines thermomagnetic protection, three protected poles, a 20 A rated current and C curve in a modular format only 54 mm wide.

Its 6 kA breaking capacity, class 3 current limiting, DIN rail mounting and suitability for isolation make it a practical solution for protecting three-phase distribution circuits against overloads and short circuits.

Important: the selection of the miniature circuit breaker must take into account the circuit design current, conductor size and capacity, the expected short-circuit current and the characteristics of the connected loads.