ABB 2CSF204003R3250 FH204 AC-25/0.3 4P 25A 300mA Type AC Residual Current Circuit Breaker

The ABB FH204 AC-25/0.3 (SKU: 2CSF204003R3250) is a 4-pole residual current circuit breaker (RCCB) rated at 25 A with a 300 mA trip sensitivity, designed for reliable earth-fault and personal protection in industrial and commercial installations. Part of the ABB FH200 series, this DIN-rail mounted device provides Type AC protection — detecting sinusoidal alternating residual currents — making it suitable for a wide range of standard electrical distribution applications. Compact at 70 mm × 85 mm × 69 mm and weighing just 380 g, the FH204 AC-25/0.3 fits easily into standard control panels and distribution boards.

Technical Specifications

Certifications & Standards

• IEC 61008: International standard for residual current operated circuit-breakers without integral overcurrent protection (RCCBs)
• EN 61008: European harmonised standard for RCCBs for household and similar uses
• IEC/EN 60664-1: Insulation coordination for equipment within low-voltage systems
• IEC/EN 61008: Combined IEC and EN compliance for RCCB performance and safety requirements
• IEC 60898-1: Circuit-breakers for overcurrent protection for household and similar installations
• EN 45555: General methods for assessing the ability of energy-related products to be repaired, reused, and recycled
• EN 60664-1: European standard for insulation coordination in low-voltage systems
• EN 61008: European standard for residual current circuit-breakers without integral overcurrent protection
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU Regulation (EC) No 1907/2006 on chemical substance safety
• WEEE: Waste Electrical and Electronic Equipment Directive compliance for responsible end-of-life disposal

Applications & Use Cases

• Earth-fault protection in residential distribution boards and commercial panels
• Personal protection against indirect contact in 3-phase + neutral (4-wire) systems
• Industrial control panels requiring DIN-rail mounted residual current protection
• Supplementary protection alongside MCBs in building services and facility management
• Standard AC sinusoidal leakage current detection in HVAC, lighting, and general power circuits