Reliable protection in a low-voltage distribution system depends on selecting a circuit breaker that matches the electrical characteristics of the protected circuit. Current rating, tripping curve, pole configuration, and short-circuit capacity all determine whether the breaker can perform correctly under normal and fault conditions.

The Schneider Electric A9F93420 belongs to the Acti9 iC60L range and is configured as a 4-pole, 20 A miniature circuit breaker with a B-curve characteristic. Its thermal-magnetic trip unit provides protection against both sustained overloads and short-circuit currents, making it suitable for appropriately designed low-voltage distribution and three-phase circuits with neutral.

The 20 A rated current makes this model suitable for circuits carrying moderate electrical loads. Correct application requires coordination between the breaker rating, conductor capacity, connected equipment, installation method, and expected operating conditions.

The B-curve characteristic provides relatively sensitive instantaneous protection. Magnetic tripping occurs at approximately 3 to 5 times the rated current, making this characteristic suitable for circuits where significant starting currents are not normally present. Loads with substantial inrush behaviour should be evaluated carefully before selecting this curve.

With four protected poles, the A9F93420 can provide coordinated protection across three phases and neutral where the circuit design requires four-pole protection. This configuration is particularly useful in distribution boards where a compact and coordinated protection device is preferred.

The breaker provides a 15 kA Icn at 400 V AC according to EN/IEC 60898-1 and an Icu of 25 kA at 380–415 V AC according to EN/IEC 60947-2. Its specified interruption capacity changes with the operating voltage, reaching 50 kA at 220–240 V AC and 20 kA at 440 V AC.

The Acti9 iC60L platform also includes VisiTrip for identifying a tripped circuit and VisiSafe for enhanced visibility during isolation. Compatible auxiliary devices, remote monitoring equipment, and Vigi residual-current protection can be added where required by the installation.

Schneider Electric A9F93420 Technical Specifications

The A9F93420 combines a 20 A nominal current, 4P configuration, and B-curve thermal-magnetic protection. These characteristics define its response to overloads and fault currents and determine the applications for which the device is technically appropriate.

The 4P configuration is particularly relevant where protection is required across three-phase conductors and neutral. The applicable breaking capacity must also be compared with the prospective short-circuit current at the installation point before commissioning.

Rated Current – 20 A

The 20 A rated current defines the nominal current level of the A9F93420. It can be used for circuits where the connected load and conductor capacity are appropriately matched to this rating.

A breaker should not be selected from current rating alone. Cable cross-section, ambient temperature, installation conditions, load characteristics, and coordination with upstream protection must also be considered.

B-Curve Tripping Characteristic

The A9F93420 uses a B-curve characteristic, with magnetic tripping at approximately 3 to 5 × In.

At 20 A, this represents an instantaneous magnetic response range of approximately 60–100 A. The B curve is generally suited to circuits with limited inrush current and provides relatively sensitive protection against high-current faults.

Four-Pole Protection

The 4P configuration provides four protected poles within a single circuit breaker. This arrangement allows coordinated protection for circuits incorporating three phases and neutral where four-pole protection is required.

The compact modular construction also simplifies installation within distribution boards and control assemblies.

Short-Circuit Breaking Capacity

The A9F93420 provides 15 kA Icn at 400 V AC, 50/60 Hz according to EN/IEC 60898-1. Under EN/IEC 60947-2, the Icu reaches 25 kA at 380–415 V AC, 50 kA at 220–240 V AC, and 20 kA at 440 V AC.

The relevant value depends on the operating voltage and applicable standard. The prospective short-circuit current of the actual installation must remain within the corresponding interruption rating.

Thermal-Magnetic Protection

The thermal-magnetic trip unit combines two different responses within the same protective device. The thermal mechanism addresses sustained overload conditions, while the magnetic mechanism provides rapid operation during high-current fault events.

This arrangement allows the A9F93420 to protect the circuit against the two principal types of overcurrent without requiring separate devices for each function.

Electrical Isolation

The A9F93420 is suitable for industrial isolation according to the applicable IEC/EN 60947-2 requirements. This function is valuable in distribution and industrial panels where safe disconnection forms part of the maintenance procedure.

Features and Benefits of the Schneider Electric A9F93420

The A9F93420 is designed for installations requiring four-pole protection with a 20 A nominal current. Its B-curve thermal-magnetic trip unit provides a defined response to both prolonged overloads and high-current faults.

The breaker also combines substantial short-circuit interruption capability with a compact modular format. VisiTrip assists with identifying a tripped circuit, while VisiSafe improves visibility when the circuit is isolated.

Key Benefits

The A9F93420 provides coordinated four-pole protection, thermal-magnetic overcurrent protection, electrical isolation capability, and high short-circuit interruption performance. Its DIN-rail modular format also allows straightforward integration into distribution boards.

Compatibility with Acti9 auxiliary equipment, remote monitoring devices, and Vigi residual-current protection provides additional flexibility when the electrical installation requires expanded protection or monitoring functions.

Applications of the Schneider Electric A9F93420 Miniature Circuit Breaker

The A9F93420 is intended for applications where its 20 A rating, 4P configuration, B-curve characteristic, and interruption capacity correspond to the requirements of the electrical system.

Three-Phase Distribution

Four-pole protection can be useful in three-phase distribution systems where coordinated protection is required across the three phases and neutral. The A9F93420 provides this arrangement within a single modular device.

Commercial Distribution Boards

Commercial buildings often contain multiple outgoing circuits with different current requirements. A 20 A four-pole breaker can provide dedicated protection for appropriately sized circuits within the distribution board.

Industrial Auxiliary Circuits

Industrial installations frequently use auxiliary circuits to support control equipment, machinery, and distribution systems. Dedicated four-pole protection can isolate a fault within the relevant circuit without unnecessarily affecting other sections of the installation.

Control Panels

Control and electrical panels can contain several low- and medium-current circuits requiring independent protection. The A9F93420 can be used where the circuit configuration and B-curve response are suitable.

Building Electrical Systems

Selected building services and electrical distribution circuits can require four-pole overcurrent protection. The A9F93420 provides a compact option where the 20 A current rating and specified fault interruption capacity meet the design requirements.

Why Buy the Schneider Electric A9F93420?

The Schneider Electric A9F93420 offers a combination of 20 A rated current, four protected poles, B-curve tripping, and thermal-magnetic protection within the Acti9 iC60L platform.

Its 15 kA Icn at 400 V AC and 25 kA Icu at 380–415 V AC provide substantial short-circuit interruption capability for appropriately designed installations.

Advantages of Choosing the Right Model

Selecting the correct breaker helps maintain coordination between the electrical load, conductor capacity, fault level, and required tripping response. The A9F93420 provides a clearly defined four-pole, 20 A B-curve solution for suitable low-voltage circuits.

Its isolation capability, visual trip indication, modular construction, and Acti9 accessory compatibility further support its use in professional distribution and control assemblies.

Buy the Schneider Electric A9F93420 from GeeTech

The exact Schneider Electric reference should be checked when purchasing an Acti9 breaker because models within the same family can differ in current rating, pole configuration, tripping curve, and breaking capacity.

GeeTech supplies Schneider Electric products for industrial projects, distribution systems, control panels, maintenance requirements, and international procurement, including sourcing for the A9F93420 reference.

Why Purchase from GeeTech?

GeeTech provides industrial electrical product sourcing, quotation services, technical assistance, and worldwide shipping.

The same purchasing service can support individual replacement requirements as well as larger quantities for electrical projects, panel manufacturing, and industrial maintenance programs.

Schneider Electric A9F93420 Price

The price of the Schneider Electric A9F93420 depends on availability, order quantity, market conditions, logistics costs, and currency fluctuations.

Schneider Electric currently lists the reference as commercially available on its French website, while some regional Schneider Electric pages show different commercial statuses. Availability should therefore be confirmed for the required destination and quantity.

Frequently Asked Questions About the Schneider Electric A9F93420

The Schneider Electric A9F93420 is an Acti9 iC60L 4-pole miniature circuit breaker rated at 20 A, with a B-curve thermal-magnetic trip unit for overload and short-circuit protection.

The rated current is 20 A. The breaker should be selected according to the load, conductor capacity, installation conditions, and required protection characteristics.

How many poles does the A9F93420 have?

The A9F93420 has 4 poles, with all four poles protected.

What tripping curve does the A9F93420 use?

The breaker uses a B-curve characteristic, with magnetic tripping at approximately 3–5 times the rated current.

What is the breaking capacity of the A9F93420?

The A9F93420 has a 15 kA Icn at 400 V AC according to EN/IEC 60898-1 and 25 kA Icu at 380–415 V AC according to EN/IEC 60947-2.

Does the A9F93420 provide overload protection?

Yes. Its thermal-magnetic trip unit provides protection against both sustained overloads and short-circuit currents.

Is the A9F93420 suitable for three-phase systems?

Yes. The four-pole configuration can be used in appropriately designed three-phase systems where protection of three phases and neutral is required.

Can the A9F93420 be used for electrical isolation?

Yes. Schneider Electric specifies suitability for industrial isolation according to the applicable IEC/EN requirements.

Does the A9F93420 have trip indication?

Yes. The Acti9 iC60L platform incorporates the VisiTrip system for rapid identification of faulty or tripped outgoing circuits.

Can additional accessories be installed?

The A9F93420 supports compatible auxiliary devices, remote monitoring equipment, and Vigi residual-current protection devices.

What is the mounting method of the A9F93420?

The breaker is designed for DIN-rail mounting, making it suitable for modular distribution boards and electrical control panels.

Is the A9F93420 still available?

Commercial availability varies between markets. Schneider Electric currently lists the A9F93420 as commercially available in France, while some other regional pages identify different commercial statuses.

Can GeeTech supply the A9F93420 internationally?

GeeTech provides international sourcing and worldwide shipping for industrial electrical equipment. Availability, quotation, and delivery conditions can be confirmed according to the required quantity and destination.

Conclusion: Why Choose the Schneider Electric A9F93420?

The Schneider Electric A9F93420 Miniature Circuit Breaker is a 4-pole, 20 A MCB from the Acti9 iC60L range, combining B-curve thermal-magnetic protection with 15 kA Icn at 400 V AC and 25 kA Icu at 380–415 V AC.

Its four protected poles make it suitable for appropriately designed three-phase and neutral circuits, while the B-curve characteristic provides a relatively sensitive response to high-current faults. DIN-rail mounting, electrical isolation capability, VisiTrip and VisiSafe functions, and compatibility with Acti9 accessories make the A9F93420 a flexible protection component for suitable distribution and control applications.