Siemens 5SL33 MCB Series | 3-Pole, 4.5kA, C Curve, Three-Phase

Siemens 5SL33 3-Pole 4.5kA C Curve Miniature Circuit Breaker (MCB) series represents the industry benchmark for safe, dependable, and highly economical three-phase circuit protection in modern residential compounds, multi-family apartment towers, and light commercial properties. Engineered to deliver concurrent mechanical tripping across all three live phases, this premium modular range prevents hazardous single-phasing motor damage conditions while shielding branch lines from severe overloads and short circuits. The series covers all industry-standard current ratings required by everyday project schedules, extending from 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, up to 63A. Featuring a certified short-circuit breaking capacity of 4500A (4.5kA) under international code IEC/EN 60898-1, the 5SL33 range seamlessly satisfies building electrical safety codes.

Manufactured to rigid Siemens quality protocols, this 3-Pole series bridges the gap between premium brand pedigree and strict structural project budget optimization in the Egyptian real estate market. The versatile C-Curve trip profile manages transient inductive starting current surges gracefully—such as those from central elevator motor sets, standard water pumps, and multi-room air conditioning units—preventing costly and frustrating nuisance tripping. Occupying exactly 54mm (3 modules) of DIN rail space, the 5SL33 family features touch-safe tunnel terminals (IP20) and uncompromised heat dissipation properties, establishing itself as a trusted workhorse for neat, ultra-organized low-voltage panel board assembly.

Comprehensive Range Applications:

• 6A, 10A & 16A Models (e.g., 5SL3316-7): Precision three-phase safety balancing for small workshop tools, automated control loops, and specialized low-power lighting distribution networks.

• 20A & 25A Models (e.g., 5SL3320-7, 5SL3325-7): The standard engineering layout for protecting small building elevator groups, commercial kitchen lines, and medium-sized central HVAC units.

• 32A & 40A Models (e.g., 5SL3332-7, 5SL3340-7): Optimized safety feeders engineered for high-capacity multi-stage water pumps and commercial air conditioning compressor arrays.

• 50A & 63A Models (e.g., 5SL3363-7): The definitive choice for use as a Main Three-Phase Sub-Panel Incomer (قاطع عمومي لوحة فرعية) in luxury villas, administrative offices, and retail showrooms.

Key Technical Advantages:

• Simultaneous 3-Pole Tripping: Breaks all three phases concurrently to eliminate partial phase power looping and prevent expensive motor burnouts.

• 4.5kA Certified Protection: Calibrated to safely clear typical household and commercial short-circuit faults without destroying adjacent switchgear.

• Patented Fail-Safe Terminals: Double-terminal square architecture allows simultaneous connection of standardized pin-type comb busbars and flexible copper cables up to 35 $mm^2$.

• Quick Clip DIN-Rail System: Advanced rear snap-on tracking clips allow easy, tool-free removal of an individual circuit breaker from the center of an assembled row without disturbing the rest of the panel line.