BY05L-32 3kA Residual Current Circuit Breaker with OC Protection

This advanced Residual Current Circuit Breaker integrates three essential protection layers into one unit. It features precise over current protection that safeguards against conductor overloads, instantaneous short circuit protection for high magnitude faults, and sensitive residual current detection (30mA standard) for life-saving shock prevention. The thermal-magnetic tripping mechanism operates independently for over current/short circuit events, while the electronic residual current module continuously monitors leakage to ground，ensuring comprehensive defense against diverse electrical hazards.  

Designed for modern distribution boards, the BY05L-32 boasts an ultra compact profile that enables higher density installations. Its unified 1P+N design occupies minimal DIN rail space (18mm module width) while maintaining full neutral isolation. The transparent trip indicator provides instant visual fault identification (over current vs. residual current), and the dual-terminal design accommodates both 25mm² busbar connections and 16mm² cable inputs. Tool-free din rail clipping and front-accessible test button further streamline electrician workflow.  

Manufactured to IEC 61009 standards, this Residual Current Circuit Breaker features silver-nickel contacts for reduced arc erosion and fiberglass-reinforced polyamide housing resistant to thermal deformation. The arc chute design achieves effective 3kA fault interruption within 3ms, while the mechanical mechanism withstands 10,000 operational cycles. Sealed construction ensures consistent performance in humid environments (85% RH non-condensing), and the integrated test circuit validates functionality monthly without manual intervention.  

The BY05L-32 RCBO secures critical circuits where space and safety converge. It protects residential lighting groups (6A), kitchen appliance circuits (20A-25A), and commercial HVAC controls (32A) against all major electrical faults. Its integrated design eliminates coordination issues between separate protective devices, ensuring reliable cascade tripping. Compliant with international wiring regulations, this 3kA Residual Current Circuit Breaker delivers code-compliant security for apartment complexes, retail spaces, offices, and educational facilities - providing peace of mind through precise, multi-layered electrical protection.