Residual Current Circuit Breaker Siemens 5SV33424, 4-pole, 25 A, 30 mA, 400 V

The Siemens Residual Current Circuit Breaker 5SV33424 is a four-pole RCCB designed for three-phase electrical installations. It is rated for 25 A nominal current with a residual current sensitivity of 30 mA and intended for use on 400 V systems. The device detects earth leakage currents and disconnects the supply to reduce the risk of electric shock and to limit fire hazards caused by insulation faults. Built to integrate into standard distribution boards, this RCCB supports selective disconnection in multi-pole networks and is compatible with typical protection and switching equipment.

Advantages

This four-pole residual current device offers reliable detection of leakage currents with a 30 mA tripping threshold that meets common safety requirements for personnel protection. The 25 A rated current is suitable for many branch circuits in commercial and residential three-phase systems. The 400 V rating aligns with standard three-phase supply voltages, allowing straightforward integration. The compact design and standardized mounting make installation and replacement convenient while maintaining consistent performance and mechanical durability under normal operating conditions.

Suitable for

• Protection of three-phase branch circuits in commercial and industrial premises
• Residential three-phase distribution panels
• Areas where protection against electric shock and earth leakage is required
• Selective disconnection schemes in multi-pole electrical systems

Key specifications

• Poles: 4-pole configuration for three-phase plus neutral protection
• Rated current: 25 A
• Residual operating current: 30 mA
• Rated operational voltage: 400 V
• Function: earth-leakage detection and supply disconnection
• Mounting: DIN-rail compatible, standard distribution board dimensions

How to use

Install the RCCB in the consumer unit or distribution board in accordance with local electrical regulations and the manufacturer’s installation instructions. Ensure the device is mounted on the appropriate DIN rail and that incoming and outgoing conductors are connected to the correct terminals for all four poles. Verify the supply is de-energized before wiring. After installation, restore power and test the trip function using the test button or a suitable test instrument to confirm operation at the specified residual current level. Periodic testing and inspection should be carried out to ensure continued functionality.

Usage recommendations

Use this residual current circuit breaker for circuits where 30 mA sensitivity is required for human protection and where the nominal current rating of 25 A matches the load. Perform regular testing and visual inspections, ensure connections remain tight, and follow applicable national safety standards when integrating the device into an electrical system.