5SU1646-6FP20

The Siemens 5SU1646-6FP20 is a 4-pole Residual Current Operated Circuit Breaker with Overcurrent Protection (RCBO), engineered to provide dual protection against both residual current (earth leakage) and overcurrent (overload and short-circuit). Designed for 3-phase systems with a neutral conductor, this RCBO features a B-characteristic tripping curve and 300mA sensitivity, making it particularly effective for resistive load circuits requiring enhanced fire safety. The device complies with Energy Limiting Class 1, ensuring fast fault clearance and improved system safety.

Key Features and Specification

• Rated Current (In): 20 A
• Rated Voltage (Un): 400 V AC
• Breaking Capacity: 6 kA
• Poles: 4
• Tripping Curve: B Characteristic (for circuits with low inrush current)
• Residual Current Type: Type A (sensitive to AC and pulsating DC leakage currents)
• Rated Residual Current: 300 mA
• Energy Limiting Class: 1 (check for normative use limitations)

Technical Information

• Number: 5SU1646-6FP20
• EAN: 4001869578255
• Commodity Code: 85362010
• Catalog Reference: LV10
• Product Group: 5532
• Group Code: P310
• Lifecycle Status: PM300 – Active Product

Applications

• Suitable for residential, commercial, and industrial installations with 3-phase + neutral systems
• Ideal for resistive loads such as lighting, heating, and control circuits with minimal inrush currents
• Provides enhanced fire protection with 300mA leakage current sensitivity
• Offers combined protection in a single compact unit, ensuring safety and compliance with modern standards

Summary:

The Siemens 5SU1646-6FP20 RCBO delivers robust and comprehensive circuit protection for 4-pole systems. With a 20A rated current, B-curve tripping behavior, and 300mA earth leakage protection, it is particularly suited for circuits where fire risk mitigation and personnel safety are critical. Its Energy Limiting Class 1 performance ensures rapid fault clearance and reduced thermal stress on conductors.