Siemens Circuit Breaker 5SL6304-7CC

📋 Key Parameters and Features

• Rated current (In): Covers a wide range from 0.3 A to 63 A, meeting protection needs from sensitive electronics to large equipment.

• Breaking capacity (Icn): Typically available in 6 kA and 10 kA versions, ensuring safe interruption of high fault currents.

• Tripping characteristics: Offers B, C, and D trip curves to suit different load types (e.g., lighting, motors) based on their starting characteristics.

• Number of poles: Available in 1P, 1P+N, 2P, 3P, 3P+N, and 4P, accommodating single‑phase, two‑phase, three‑phase, and various distribution systems.

• Rated voltage: Maximum operating voltage up to 400 V AC; some models are also suitable for 72 V DC circuits.

• Operating temperature: Wide range (e.g., –25°C to +55°C) ensures stable performance in diverse environments.

• Protection degree: Typically IP20, suitable for installation inside dry distribution boards.

🔧 Sub‑Series Breakdown

Within the 5SL family, there are several sub‑series based on performance and application:

• 5SL4 – High‑breaking capacity: Focuses on high performance, typically with a 10 kA breaking capacity, ideal for critical circuits requiring high reliability.

• 5SL6 – Standard: Cost‑effective, with a 6 kA breaking capacity, suitable for most conventional distribution protection applications.

• 5SL5 – DC version: Specifically designed for DC circuits, addressing unique DC protection requirements.

There are also additional sub‑series such as 5SL3, forming a complete product matrix.

🔌 Expansion and Accessories

A major advantage of the 5SL series is its extensive expansion capability. A variety of accessories can be added to enable advanced functions:

• Auxiliary contacts / fault signal contacts: For remote indication of the breaker’s on/off status or trip due to fault.

• Shunt release: Enables remote tripping.

• Undervoltage release: Automatically opens the circuit when voltage drops too low, protecting equipment.

• Busbars: Rectangular terminal design facilitates easy connection to busbars, simplifying wiring.

🏭 Main Application Areas

Thanks to its comprehensive performance, the 5SL series is widely used in many sectors:

• Industrial: Power circuit protection for industrial automation systems, control cabinets, and machinery.

• Building: Distribution systems in commercial and residential buildings, floor distribution boards.

• Infrastructure: Data centres, hospitals, and other facilities where power supply stability is critical.