S204-C25 4P 25A Curve C 10kA Circuit Breaker

The ABB S204-C25 thermal-magnetic circuit breaker, reference 2CDS254001R0254, is a modular automatic circuit breaker with 4 poles, 25 A and C tripping curve, designed to protect electrical installations against overloads and short circuits. It belongs to ABB’s System pro M compact S200 range and offers a breaking capacity of 10 kA at 400 V according to IEC/EN 60947-2 and 6 kA at 400 V according to IEC/EN 60898-1.

Its four-pole configuration allows simultaneous protection of the four active conductors of the installation, while the C curve provides behavior especially suitable for distribution circuits with resistive or inductive loads that present moderate inrush currents. Its DIN rail mounting and four-module width make it easy to integrate into residential, commercial and industrial electrical panels.

25 A thermal-magnetic protection

The ABB S204-C25 combines two tripping systems designed to protect the conductors and loads connected to the circuit.

• Thermal protection: acts when an overcurrent persists for a certain period of time, protecting the circuit against overloads.
• Magnetic protection: provides rapid tripping in the event of high currents caused by a short circuit.

The rated current of the breaker is 25 A, with a reference ambient temperature of 30 °C according to ABB’s specified conditions.

4-pole configuration

Reference 2CDS254001R0254 has 4 total poles and 4 protected poles. This allows the four conductors connected to the device to be opened and protected simultaneously.

The four-pole configuration is especially useful in three-phase systems with neutral where a joint disconnection of the circuit is required.

C tripping curve

The ABB S204-C25 uses a C tripping curve. This feature is intended for circuits that may experience moderate transient currents when loads are switched on.

C-curve circuit breakers are commonly used in:

• General distribution circuits.
• Commercial and tertiary installations.
• Small motors.
• HVAC equipment.
• Lighting.
• Small power transformers.
• Resistive and inductive loads with moderate inrush current.

The curve should always be selected according to the load’s starting current and the circuit’s disconnection conditions.

10 kA breaking capacity according to IEC/EN 60947-2

According to IEC/EN 60947-2, ABB specifies for the S204-C25 a rated ultimate breaking capacity Icu of 10 kA at 400 V AC.

For other voltages, ABB declares among its values:

• Icu at 230 V AC: 20 kA.
• Icu at 400 V AC: 10 kA.

This interrupting capacity allows the thermal-magnetic breaker to be used in professional panels provided that the prospective short-circuit current at the installation point does not exceed the device’s performance.

6 kA according to IEC/EN 60898-1

When the breaker is considered compliant with IEC/EN 60898-1, ABB specifies a rated breaking capacity Icn of 6 kA at 400 V.

For this reason, the reference may be commercially described both as a 6 kA and a 10 kA thermal-magnetic breaker. Both data are compatible: they correspond to different standards and test criteria.

Rated voltage of 400 V

The breaker is designed for a rated voltage of 400 V and can operate at frequencies of 50 or 60 Hz.

ABB also specifies a maximum operating voltage of up to 440 V AC within the conditions established for the range.

Insulation voltage and impulse withstand voltage

Among the main dielectric characteristics of the S204-C25 are:

• Rated insulation voltage Ui: 440 V.
• Rated impulse withstand voltage Uimp: 4 kV.
• Pollution degree: 3.

These features allow its use in low-voltage electrical panels for residential, commercial and industrial applications.

Energy limiting class 3

The ABB S204-C25 has energy limiting class 3. This feature helps reduce the energy flowing through the circuit during a short circuit.

The limitation helps reduce the thermal and electrodynamic stresses that conductors and equipment installed downstream of the breaker may suffer.

DIN rail mounting

The thermal-magnetic breaker is designed for mounting on a 35 mm DIN rail. ABB specifies compatibility with:

• TH35-15: 35 x 15 mm DIN rail according to IEC 60715.
• TH35-7.5: 35 x 7.5 mm DIN rail according to IEC 60715.

The device can be installed in different positions and its modular format makes it easy to integrate alongside other ABB protection devices.

4 module widths

The ABB S204-C25 occupies 4 modular spaces, with a total width of 70 mm.

Its dimensions are:

• Width: 70 mm.
• Height: 88 mm.
• Depth: 69 mm.
• Installation depth: 69 mm.
• Approximate net weight: 0.5 kg.

Screw terminals for a secure connection

The S200 series uses screw terminals designed to provide a firm connection of the conductors. The reference accepts different cross-sections depending on the type of cable used.

• Rigid conductor: 0.75 to 35 mm².
• Stranded conductor: 0.75 to 35 mm².
• Flexible conductor: 0.75 to 25 mm².
• Flexible conductor with ferrule: 0.75 to 25 mm².
• Tightening torque: 2.8 Nm.

Connection must be made respecting the cross-sections and tightening torque indicated by ABB.

Compatible with ABB distribution systems

The design of the S204-C25 allows integration with accessories and distribution systems corresponding to the ABB System pro M compact family.

The S200 range includes different auxiliary elements that expand the signaling and control possibilities of the thermal-magnetic breaker, such as compatible auxiliary contacts and signaling contacts.

It can also be used together with compatible ABB residual current blocks from the DDA 200 family when differential protection needs to be added to the assembly.

Contact position indicator

The breaker includes visual indication of the contact status, making it easier to identify the ON or OFF position during operation and maintenance tasks.

The front operating handle can also be sealed in certain configurations to limit unauthorized handling.

IP20 protection rating

The device has an IP20 protection rating. ABB indicates that IP40 can be achieved when installed inside an enclosure with a suitable cover.

As a modular component, it must be installed in an electrical panel that provides the degree of protection required by the environmental conditions of the location.

Wide temperature range

The S204-C25 is designed to operate in an ambient temperature range of -25 to +55 °C.

For storage, ABB specifies a range of -40 to +70 °C, providing flexibility for different transport, storage and installation conditions.

Mechanical strength

ABB specifies high resistance to vibration and impact for the range. The S204-C25 withstands vibration tests according to IEC 60068-2-6 and impact tests according to IEC 60068-2-27.

Its construction is aimed at providing reliable operation in professional electrical panels subjected to normal service conditions.

Electrical and mechanical durability

The product technical documentation specifies a mechanical durability of up to 20,000 cycles and an electrical durability of up to 20,000 AC cycles, within the conditions defined by ABB.

These features make it suitable for installations where a long service life of the protection device is required.

Applications of the ABB S204-C25

Thanks to its 4 poles, 25 A rated current and C curve, this thermal-magnetic breaker can be used in different types of electrical panels:

• Residential installations.
• Commercial buildings.
• Tertiary installations.
• Industrial electrical panels.
• Three-phase circuits with neutral.
• HVAC equipment.
• Small motors and machinery.
• Low-voltage distribution circuits.

Technical characteristics of the ABB 2CDS254001R0254

• Brand: ABB.
• Reference: 2CDS254001R0254.
• Model: S204-C25.
• Range: System pro M compact S200.
• Type: modular thermal-magnetic circuit breaker.
• Number of poles: 4P.
• Protected poles: 4.
• Rated current In: 25 A.
• Tripping curve: C.
• Rated voltage: 400 V.
• Frequency: 50/60 Hz.
• Breaking capacity Icn at 400 V according to IEC/EN 60898-1: 6 kA.
• Breaking capacity Icu at 400 V according to IEC/EN 60947-2: 10 kA.
• Breaking capacity Icu at 230 V according to IEC/EN 60947-2: 20 kA.
• Insulation voltage Ui: 440 V.
• Impulse withstand voltage Uimp: 4 kV.
• Energy limiting class: 3.
• Voltage type: AC/DC according to manufacturer configuration and conditions.
• Protection rating: IP20.
• Protection in enclosure with cover: IP40.
• Pollution degree: 3.
• Mounting: 35 mm DIN rail.
• Number of modules: 4.
• Width: 70 mm.
• Height: 88 mm.
• Depth: 69 mm.
• Approximate net weight: 0.5 kg.
• Tightening torque: 2.8 Nm.
• Rigid conductors: 0.75-35 mm².
• Flexible conductors: 0.75-25 mm².
• Operating temperature: -25 to +55 °C.
• Storage temperature: -40 to +70 °C.
• Mechanical durability: up to 20,000 cycles.
• Main standards: IEC/EN 60898-1 and IEC/EN 60947-2.
• EAN: 4016779529235.

Four-pole thermal-magnetic breaker for professional panels

The ABB S204-C25 provides thermal-magnetic protection for circuits up to 25 A through four protected poles and a C curve suitable for many general-purpose loads. Its modular design makes it easy to install in electrical panels on DIN rail and combine with other ABB devices and accessories.

With 10 kA Icu breaking capacity at 400 V according to IEC/EN 60947-2, 6 kA Icn according to IEC/EN 60898-1, class 3 energy limiting and capacity for rigid conductors up to 35 mm², it offers a robust solution for residential, commercial and industrial applications.

Important: before installing the breaker, verify that the rated current, tripping curve, conductor cross-section and breaking capacity are suitable for the characteristics of the circuit and the prospective short-circuit current at the installation point.