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Siemens 4P 100A 30mA RCBO (5SU1374-8AK81) – Industrial

The Siemens 5SU1374-8AK81 is a heavy-duty 4P 100A RCBO engineered for 400V industrial power systems requiring specialized Type B residual current detection. Installed as a main incomer, this 72mm unit combines 30mA earth leakage sensing with robust overload and short circuit protection.

Quick Answer

Absolutely, invest in the Siemens 5SU1374-8AK81 if your industrial setup in India demands top-tier electrical safety for 400V systems. This 4P 100A 30mA RCBO is specifically engineered for high-risk environments requiring Type B residual current detection, safeguarding both personnel and sensitive machinery against severe earth faults. Its 10kA breaking capacity makes it ideal as a main incomer where robust fault interruption is critical.

✓Safeguards industrial personnel from leakage—30mA residual current sensitivity trips within 300ms at 1x Idn.
✓10kA breaking capacity—Specially designed to interrupt high-current short circuits to prevent distribution panel damage.
✓Efficient heat dissipation—Low power loss of 2.5W per pole prevents excessive thermal build-up during 100A operation.
✓Compact industrial footprint—4-module (72mm) width allows for high-density installation on standard 35mm DIN rails.
✓Reliable in extreme climates—Operating range of -25°C to +55°C ensures performance in diverse Indian industrial environments.
✓German engineering standards—Certified to IEC 60947 2 and IEC 61009 1 for rigorous industrial safety compliance.

Opt for the Siemens 5SU1374-8AK81 if you operate critical industrial infrastructure in India requiring specialized Type B earth leakage protection and high current handling. Avoid if your application is residential, purely commercial, or only needs basic Type A/AC RCDs, as its robust industrial specifications would be an overkill and unnecessary expense.

Product Overview
The Siemens 5SU1374-8AK81 is a heavy-duty 4P 100A RCBO engineered for 400V industrial power systems requiring specialized Type B residual current detection. Installed as a main incomer, this 72mm unit combines 30mA earth leakage sensing with robust overload and short circuit protection.

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Engineering Analysis
The 30mA sensitivity is vital for personnel protection in high-risk zones, while the 10kA breaking capacity safely interrupts massive faults at the main distribution source. Its 4P configuration provides a switched neutral, which is essential for isolating the entire 440V circuit from potential neutral-to-earth voltage hazards.

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