SCHNEIDER A9R74440 Residual Current Circuit Breaker (RCCB) Type AC 4P 40A 300mA

RCD Circuit Breaker SCHNEIDER A9R74440 Earth Leakage Protection Device RCCB Type AC 4P 40A 300mA
The Acti9 iID residual current circuit breaker, part number A9R74440, is a reliable, modular-mounted protection device for AC electrical systems. This product immediately trips the electrical circuit when an earth leakage current exceeds the rated 300 mA, helping to prevent equipment damage and reduce the risk of fire caused by leakage currents as well as electric shock hazards from indirect contact. It features VisiSafe and VisiTrip for enhanced safety and easier maintenance.

Specifications
- VisiSafe: A green strip on the operating toggle indicates full contact opening, ensuring no voltage is present on the outgoing circuit for safe maintenance work.
- VisiTrip (on select models - please verify): A unique mechanical indicator that identifies the faulty device, reducing downtime and troubleshooting effort.
- Type AC: Designed to detect and protect against standard sinusoidal AC leakage currents. Voltage Independent: Tripping technology operates independently of line voltage, ensuring accurate and dependable operation.
- Easy Installation: DIN rail mounted and compatible with busbar connections.

Applications & Usage
- Fire Protection: Installed as main earth leakage protection in Main Distribution Boards or sub-distribution boards to mitigate fire hazards caused by high earth leakage currents.
- Indirect Contact Protection: Used to safeguard against hazards arising from contact with metallic frames of equipment experiencing current leakage.
- Industrial and Commercial Applications: Ideal for circuits prone to normal operational leakage that is not immediately life-threatening (e.g., large motor circuits, heating appliances, or installations requiring selective protection coordinated with downstream RCCBs/RCBOs with sensitivities lower than 30 mA).