Siemens 5SL6320-7 Miniature Circuit Breaker 3P 20A C 6kA 400V

The Siemens 5SL6320-7 (MLFB: 5SL6320-7) is a SENTRON 3-pole miniature circuit breaker rated at 20 A with a C tripping characteristic and 6 kA breaking capacity at 400 V AC. Designed for overcurrent and short-circuit protection, it is suitable for residential buildings and infrastructure applications.

Technical specifications:

• MLFB: 5SL6320-7
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Miniature circuit breaker
• Number of poles: 3 (3P)
• Tripping characteristic: C
• Rated current: 20 A at 30 °C / 18.79 A at 40 °C / 16.8 A at 55 °C
• Rated voltage (AC): 400 V, 50/60 Hz
• Max operating voltage (AC, multi-phase): 440 V
• Max operating voltage (DC): 62.5 V per pole
• Breaking capacity: 6 kA (EN 60898 / IEC 60947-2)
• Energy limitation class: 3
• Power loss per pole: 2.2 W
• Protection rating: IP20 (with connected conductors)
• Overvoltage category: 3
• Degree of pollution: 2
• Conductor cross-section (solid, stranded, finely stranded with ferrule): 0.75 - 25 mm²
• Tightening torque: 2.5 - 3 Nm
• Dimensions (WxHxD): 54 x 90 x 76 mm
• Installation depth: 70 mm
• Modular width units: 3
• Net weight: 380 g
• Operating temperature: -25 °C to +45 °C
• Storage temperature: -40 °C to +75 °C
• Mounting position: any

Features and benefits:

• Touch protection built in (IP20)
• Halogen-free and silicon-free construction
• Sealable design to prevent unauthorized operation
• Compatible with supplementary add-on devices
• Mechanical service life of 10,000 operating cycles
• Suitable for both AC and DC circuits (separate, not mixed use)

Applications:

• Final circuit protection in residential and infrastructure distribution boards
• Overcurrent and short-circuit protection for 3-phase loads
• DIN rail installation in consumer units and switchgear panels
• Protection of motor and general electrical circuits with delayed tripping under moderate overloads (C curve)

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

Also known as: Siemens 5SL6320-7, Siemens SENTRON MCB 3P 20A C curve.