ABB FH204AC-63/0.03 Residual Current Circuit Breaker

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1. Product Overview

The ABB FH204AC-63/0.03 is a 4-pole AC residual current circuit breaker (RCCB) designed to protect circuits and connected devices against leakage currents and overload. It trips immediately when leakage exceeds 30 mA, ensuring personnel and equipment safety, while maintaining reliable distribution system operation.

2. Technical Specifications

• Model: FH204AC-63/0.03

• Type: 4-pole AC residual current circuit breaker

• Rated Current (In): 63 A

• Rated Voltage (Ue): 400 V AC

• Residual Operating Current (IΔn): 30 mA

• Poles: 4P

• Breaking Capacity: ≥ 6 kA

• Trip Type: AC type (sensitive to AC leakage current)

• Mounting: DIN rail

• Operating Temperature: ‑25 °C to +40 °C

• Protection Rating: IP20

• Standards: IEC/EN 61008-1

3. Key Advantages & Features

1. High Sensitivity Protection – 30 mA leakage current protects personnel.

2. Reliable Fast Tripping – AC type trips rapidly to ensure safety.

3. Multi-Pole Design – 4 poles for three-phase four-wire systems.

4. Easy Installation & Maintenance – DIN rail mounting for panel and distribution box integration.

5. Standard Compliance – IEC/EN certified, globally recognized.

6. Wide Current Rating – 63 A suitable for industrial and large commercial distribution systems.

4. Typical Applications

• Industrial plants and workshops distribution systems

• Commercial buildings and residential leakage protection

• Distribution boards and control panel protection

• Motor and high-power equipment leakage monitoring

• Medical equipment and critical facility protection

5. Installation & Usage Notes

1. Power Matching – Ensure the breaker voltage matches the supply system.

2. Proper Wiring – Connect phase and neutral correctly to maintain leakage protection.

3. Environmental Conditions – Avoid moisture, dust, and corrosive environments.

4. Regular Testing – Press the “Test” button monthly to verify leakage protection.

5. Secure Mounting – Ensure the breaker is firmly fixed to avoid loose contacts affecting safety.