Siemens 5SL6140-6 Miniature Circuit Breaker 1P 40A B 6kA

The Siemens 5SL6140-6 (MLFB: 5SL6140-6) is a 1-pole SENTRON miniature circuit breaker rated at 40 A with a B tripping characteristic and 6 kA breaking capacity at 230/400 V AC. Designed for residential and infrastructure applications, it provides overcurrent and short-circuit protection on AC and DC circuits up to 62.5 V DC per pole.

Technical specifications:

• MLFB: 5SL6140-6
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Miniature circuit breaker
• Number of poles: 1 (1P)
• Tripping characteristic: B
• Rated current: 40 A (at 30 °C); 37.57 A (at 40 °C); 33.61 A (at 55 °C)
• AC supply voltage: 400 V, 50/60 Hz
• Max operating voltage (multi-phase AC): 440 V
• Max operating voltage (DC): 62.5 V per pole
• Breaking capacity (EN 60898 / IEC 60947-2): 6 kA
• Energy limitation class: 3
• Power loss per pole at rated current: 3.4 W
• IP rating: IP20 (with connected conductors)
• Overvoltage category: 3
• Degree of pollution: 2
• Operating temperature: -25 °C to +45 °C
• Storage temperature: -40 °C to +75 °C
• Conductor cross-section (solid/stranded/ferrule): 0.75 - 25 mm²
• Tightening torque: 2.5 - 3 N·m
• Dimensions (WxHxD): 18 x 90 x 76 mm
• Installation depth: 70 mm
• Modular width: 1 unit (18 mm)
• Net weight: 162 g
• Mounting: DIN rail, any position
• Mechanical service life: 10,000 operating cycles (typical)

Features and benefits:

• Touch protection (IP20) ensures safe handling after installation
• Halogen-free and silicon-free construction
• Sealable design to prevent unauthorised adjustment
• Compatible with supplementary devices for extended functionality
• Suitable for both AC and DC circuits (separate use only - mixed use not permitted)
• Flexible conductor connection accepting solid, stranded, and ferrule-terminated cables up to 25 mm²

Applications:

• Final circuit protection in residential distribution boards
• Infrastructure installations requiring B-characteristic overcurrent protection
• Protection of resistive and slightly inductive loads at 40 A
• DIN rail panel assemblies in commercial building installations

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

Also known as: Siemens 5SL6140-6, Siemens SENTRON 1P 40A B-curve MCB.