SCHNEIDER A9R74225 Residual Current Circuit Breaker (RCCB) Type AC 2P 25A 300mA

RCD Circuit Breaker SCHNEIDER A9R74225 Residual Current Device RCCB Type AC 2P 25A 300mA

The SCHNEIDER A9R74225 is a residual current circuit breaker designed for DIN rail mounting in electrical control panels, with the main purpose of system protection and preventing fire risks caused by high earth leakage currents of 300  mA. Since its tripping sensitivity is 300 mA—higher than the recommended threshold for direct personal protection of 30 mA—this RCCB model is commonly installed as upstream protection to serve as backup protection or to isolate damaged circuits from the rest of the system.

Specifications
- Fire Protection: The 300 mA sensitivity is highly effective in detecting large leakage currents that can cause heat and fire.
- Voltage Independent Operation: The tripping mechanism functions independently of voltage drops or surges, ensuring reliable protection.
- VisiSafe and VisiTrip: Unique features that enhance maintenance safety and reduce troubleshooting time for faulty circuits.
- High Durability: Designed for mechanical endurance of 20,000 cycles and electrical endurance of 15,000 cycles. Modular installation: Easily mounts on DIN rails and provides robust durability meeting industrial standards.

Applications & Usage
- Main Circuit Protection: Used as the primary RCCB protection device in distribution boards to protect against leakage currents that could pose hazards to the building and overall electrical system.
- Building Installations: Suitable for use in commercial buildings, factories, or residential installations, especially in circuits that do not require high sensitivity like 30 mA.
- Selectivity: Typically used in conjunction with 30 { mA sensitivity RCCBs or RCBOs installed downstream, enabling only the faulty section to trip (Selective Protection).