Siemens 5SL6363-6 Miniature Circuit Breaker 3P 63A B 6kA 400V

The Siemens 5SL6363-6 (MLFB: 5SL6363-6) is a SENTRON 3-pole miniature circuit breaker rated at 63 A with a B tripping characteristic and 6 kA breaking capacity at 400 V AC. Designed for residential buildings and infrastructure applications, it provides reliable overcurrent and short-circuit protection on DIN rail installations.

Technical specifications:

• MLFB: 5SL6363-6
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Miniature circuit breaker
• Number of poles: 3 (3P)
• Tripping characteristic: B
• Rated current: 63 A at 30 °C / 59.18 A at 40 °C / 52.93 A at 55 °C
• Supply voltage: 400 V AC, 50/60 Hz
• Max operating voltage (multi-phase AC): 440 V
• Max operating voltage (DC per pole): 62.5 V
• Breaking capacity: 6 kA (EN 60898 / IEC 60947-2)
• Energy limitation class: 3
• Insulation voltage (Ui): 440 V AC (multi-phase)
• Overvoltage category: 3
• Degree of pollution: 2
• IP rating: IP20 (with connected conductors)
• Power loss per pole at rated current: 5.3 W
• Connectable conductor cross-section: 0.75 - 25 mm² (solid, stranded, finely stranded with core end processing)
• Tightening torque: 2.5 - 3 Nm
• Dimensions (W x H x D): 54 x 90 x 76 mm
• Installation depth: 70 mm
• Modular width: 3 units
• Mounting position: any
• Net weight: 486 g
• Operating temperature: -25 °C to +45 °C
• Storage temperature: -40 °C to +75 °C
• Mechanical service life: 10,000 operating cycles (typical)

Features and benefits:

• Touch protection (IP20) for safe installation in distribution boards
• Halogen-free and silicon-free construction
• Sealable design to prevent unauthorized operation
• Compatible with supplementary devices for extended functionality
• Suitable for both AC and DC circuits (not mixed use)
• Flexible mounting in any orientation on DIN rail

Applications:

• Final circuit protection in residential and infrastructure distribution boards
• Branch circuit protection for high-load three-phase equipment
• Industrial panels requiring DIN rail-mounted overcurrent protection
• Installations requiring energy limitation class 3 performance

Compliant with EN 60898 and IEC 60947-2. Part of the Siemens SENTRON range.

Also known as: Siemens 5SL6363-6, Siemens SENTRON 3-pole 63A MCB, Siemens miniature circuit breaker B63 3P.