4P 40A AC Class 30mA Residual Current Circuit Breaker

The ABB FH204 AC-40/0.03 residual current circuit breaker, reference 2CSF204004R1400, is a four-pole RCD from the FH200 series designed to protect people and installations against earth leakage currents. It features 4 poles, a rated current of 40 A and a residual current sensitivity of 30 mA, making it especially suitable for electrical panels in residential and commercial installations.

This model is AC type and instantaneous, so it is designed to detect sinusoidal alternating residual currents. Its 30 mA sensitivity provides additional residual current protection in electrical installations, always as part of a properly sized and protected system in accordance with applicable regulations.

Main features of the ABB FH204 AC residual current device

• Brand: ABB.
• Series: FH200.
• Model: FH204 AC-40/0.03.
• Reference: 2CSF204004R1400.
• Type: RCCB residual current circuit breaker.
• Number of poles: 4.
• Rated current: 40 A.
• Residual current sensitivity: 30 mA.
• Type: AC.
• Operation: instantaneous.
• Rated voltage: 230/400 V AC.
• Insulation voltage Ui: 500 V.
• Impulse withstand voltage Uimp: 4 kV.
• Frequency: 50/60 Hz.
• Mounting: DIN rail.
• Width: 4 modules.
• Terminal protection rating: IP2X.
• Standard: IEC/EN 61008.

30 mA residual current protection

The ABB FH204 AC incorporates a rated residual current of 30 mA. When it detects a difference between the current entering and returning through the live conductors above the set threshold, the device disconnects the circuit to limit the risks associated with earth leakage current.

The 30 mA sensitivity is commonly used as additional residual current protection against electric shock in low-voltage installations. The RCD must be part of a correctly designed installation and does not replace specific protection against overloads and short circuits.

AC type for alternating residual currents

This model belongs to AC type. It is designed to detect sinusoidal alternating residual currents, making it a solution intended for circuits and loads compatible with this type of residual current protection.

The selection of the RCD type must take into account the characteristics of the connected equipment and the requirements of the installation. When loads may generate pulsating DC components or other residual current waveforms, it should be checked whether another type of RCD is required.

Four-pole configuration for three-phase installations

The FH204 AC-40/0.03 has 4 poles, allowing the simultaneous disconnection of the live conductors in installations compatible with its configuration. This makes it especially suitable for three-phase panels with neutral in homes, commercial premises and other low-voltage installations.

Its operating voltage is 230/400 V AC, with an insulation voltage of 500 V and an impulse withstand voltage of 4 kV.

Rated current of 40 A

The RCD supports a rated current In of 40 A. This value determines the current that can continuously flow through the device under the conditions specified by ABB.

As an RCCB, its main function is residual current protection and it does not include thermal-magnetic protection against overloads or short circuits. The installation must include the appropriate overcurrent protection devices, correctly coordinated with the RCD.

Short-circuit protection by upstream device

ABB specifies for FH200 residual current devices a conditional short-circuit withstand rating of up to 6 kA when a 63 A gL fuse is used upstream. In addition, the product technical documentation indicates a rated short-circuit service capacity of 1 kA.

Coordination with the upstream protective device must be carried out in accordance with the manufacturer’s tables, instructions and the installation regulations.

Immunity to nuisance tripping

ABB’s FH200 AC type range has a transient current immunity of up to 250 A with an 8/20 µs waveform. This feature helps reduce unwanted tripping caused by certain transient disturbances within the conditions defined by the manufacturer.

DIN rail mounting and 4-module format

The ABB FH204 AC is designed for installation on a DIN rail in modular electrical panels. It occupies 4 modules of 17.5 mm, equivalent to an approximate width of 70 mm, making it easy to integrate alongside MCBs and other protection and control devices.

Its approximate dimensions are 70 mm wide, 85 mm high and 69 mm deep. The declared installation depth is 69 mm.

IP2X protected terminals

The terminals have an IP2X protection rating. The connection system accepts conductors up to 25 mm² at the main terminal, depending on the configuration and conductor type specified by ABB.

ABB’s technical guide indicates connections via a bidirectional cage clamp terminal, suitable for flexible or rigid conductors.

Applications of the ABB FH204 AC-40/0.03 residual current device

The FH200 range is mainly intended for residential and commercial installations. This four-pole version can be used in electrical panels that require 30 mA residual current protection and a rated current of up to 40 A, provided that AC type is compatible with the connected loads.

• Home electrical panels.
• Three-phase installations with neutral.
• Commercial premises and offices.
• Secondary distribution boards.
• Residential and commercial installations.
• Circuits compatible with AC type residual current protection.

Technical data of the ABB FH204 AC-40/0.03

• Manufacturer: ABB.
• Family: FH200.
• Model: FH204 AC-40/0.03.
• Manufacturer reference: 2CSF204004R1400.
• EAN: 8012542894001.
• Device type: RCCB - residual current circuit breaker.
• Poles: 4.
• Rated current In: 40 A.
• Rated residual current IΔn: 30 mA.
• Residual current type: AC.
• Tripping: instantaneous.
• Rated voltage: 230/400 V AC.
• Rated insulation voltage Ui: 500 V.
• Impulse withstand voltage Uimp: 4 kV.
• Rated frequency: 50/60 Hz.
• Rated short-circuit service capacity: 1 kA.
• Maximum impulse current: 0.25 kA.
• Conditional short-circuit withstand rating: up to 6 kA with 63 A gL fuse upstream according to ABB.
• Mounting: DIN rail.
• Number of modules: 4.
• Width: 70 mm.
• Height: 85 mm.
• Depth: 69 mm.
• Protection rating: IP2X.
• Maximum conductor cross-section: up to 25 mm².
• Standard: IEC/EN 61008.

Four-pole residual current circuit breaker for electrical panels

The ABB FH204 AC-40/0.03 offers a residual current protection solution for electrical panels requiring 4 poles, 40 A and 30 mA sensitivity. Its modular format, DIN rail mounting and design for residential and commercial applications make it easy to integrate into low-voltage distribution boards.

To ensure proper protection, this residual current circuit breaker must be installed together with the necessary overcurrent protection devices and selected according to the characteristics of the network, the connected loads and the current electrical regulations.