ABB B273222 - Residual Current Device 4P 25A 30mA Type B

ABB B273222 - Differential Lock 4P 25A 30mA Type B - Advanced Protection for Electrical Installations

Maximum security for industrial, commercial and plant applications with advanced electronics

The ABB B273222Differential Block is an essential device in the DDA 200 series, designed to provide high differential protection in electrical installations. Thanks to the Type B protection, it is able to detect alternating leakage current (AC), pulsating direct current (A) and pure direct current (B)up to 1kHz, offering reliable and long-lasting protection.

This feature makes it particularly suitable for photovoltaic systems, inverters, variable speed motors, electric vehicle charging stations and systems with advanced electronics, ensuring operational continuity and safety.

Designed by ABB, a leading company in the electrical safety industry, the DDA204 B 25A 4P 30mA ensures maximum reliability and compliance with international safety standards, protecting plants and people with high performance.

Main features:

• Order code: ABB B273222
• Type: Differential lock for circuit breakers
• Number of poles: 4P
• Current rating: 25A
• Differential sensitivity: 30mA
• Type of protection: Type B (protection for AC, A and B currents)
• Voltage rating: 230/400V AC
• Rated insulation voltage: 500V
• Pulse voltage resistance (Uimp): 4 kV
• Mounting: DIN rail (4 modules)
• Grade of protection: IP2X
• Pulse current resistance: 3 kA
• Compatibility with electrical auxiliaries: Yes
• Operating temperature: -25 to 55 °C

Main advantages:

✅ Advanced protection for industrial, photovoltaic and EV charging systems
✅ Differential sensitivity of 30mA, ideal for applications with higher protection requirements
✅ Compatibility with ABB S 200 and M 200 series circuit breakers
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