S-ARC1 B25 Arc Fault Detection Device (AFDD) with MCB – 1P+N – B – 25 A – 6 kA

Why Choose the ABB S-ARC1 B25 Arc Fault Detection Device?

The ABB S-ARC1 B25 is a compact arc fault detection device (AFDD) with integrated miniature circuit breaker (MCB) designed to provide enhanced protection for single-phase final circuits. As part of the ABB S-ARC1 series, it combines arc fault detection with thermal-magnetic overload and short-circuit protection within a single two-module DIN rail device.

The S-ARC1 protects end-user circuits against earth, parallel and series arc faults as well as conventional overloads and short-circuit currents. By detecting electrical arcing that conventional MCB protection alone may not identify, the device provides an additional level of protection against faults associated with damaged conductors, deteriorated insulation and poor electrical connections.

With a rated current of 25 A, a B tripping characteristic and a rated operational voltage of 230–240 V AC, the S-ARC1 B25 is designed for 1P+N single-phase circuits. It provides a 6 kA rated service short-circuit breaking capacity and a 7.5 kA rated ultimate short-circuit breaking capacity, making it suitable for residential and commercial final circuits requiring combined arc fault, overload and short-circuit protection.

Key Advantages

• Combines arc fault detection and MCB protection in one compact device.
• 25 A rated current with B tripping characteristic.
• Protects against earth, parallel and series arc faults.
• Integrated thermal-magnetic protection against overloads and short circuits.
• 6 kA rated service short-circuit breaking capacity.
• 7.5 kA rated ultimate short-circuit breaking capacity.
• High electrical and mechanical endurance for dependable operation.
• Flexible power supply connection supports installation requirements.
• Compact two-module design helps conserve distribution board space.

Key Features

• ABB S-ARC1 arc fault detection device series.
• 25 A rated current.
• B tripping characteristic.
• 1P+N configuration with one protected pole.
• 230–240 V AC rated operational voltage.
• 6 kA rated service short-circuit breaking capacity.
• 7.5 kA rated ultimate short-circuit breaking capacity.
• 500 V rated insulation voltage.
• 4 kV rated impulse withstand voltage.
• Protection against earth, parallel and series arc faults.
• Integrated thermal-magnetic MCB functionality.
• Energy limiting class 3.
• Electrical endurance of 10,000 cycles.
• Mechanical endurance of 20,000 cycles.
• Red ON / green OFF contact position indication.
• DIN rail mounting with screw terminals.
• Compact two-module construction.

Enhanced Arc Fault and Overcurrent Protection

Arc fault detection devices monitor electrical circuits for characteristic conditions associated with potentially dangerous electrical arcing. The ABB S-ARC1 is designed to protect against earth, parallel and series arc faults while its integrated miniature circuit breaker provides thermal-magnetic protection against overloads and short-circuit currents.

Combining AFDD and MCB functionality within a compact two-module device helps simplify distribution board design while providing protection against electrical faults that conventional MCBs alone are not designed to detect. The S-ARC1 series is designed for residential and commercial applications where enhanced protection of single-phase final circuits is required.

Typical Applications

• Residential electrical distribution boards.
• Commercial electrical distribution systems.
• Single-phase final circuits requiring enhanced arc fault protection.
• Circuits protected at 25 A requiring a B tripping characteristic.
• Compatible general-purpose electrical final circuits.
• Installations where enhanced protection against electrically initiated fires is required.
• Installations requiring combined arc fault, overload and short-circuit protection.