Siemens 5SL6140-7 Miniature Circuit Breaker 1P 40A C 6kA

The Siemens 5SL6140-7 is a SENTRON miniature circuit breaker rated 40 A, 1-pole, with C tripping characteristic and a breaking capacity of 6 kA per EN 60898 and IEC 60947-2. Designed for AC and DC circuits, it provides overcurrent and short-circuit protection in residential and infrastructure installations.

Technical specifications:

• MLFB: 5SL6140-7
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Miniature circuit breaker
• Number of poles: 1
• Tripping characteristic: C
• Rated current: 40 A (at 30 °C); 37.57 A (at 40 °C); 33.61 A (at 55 °C)
• Supply voltage (AC): 400 V, 50/60 Hz
• Operating voltage (AC, multi-phase): max 440 V
• Operating voltage (DC): max 62.5 V per pole
• Insulation voltage (single-phase AC): 250 V; (multi-phase AC): 440 V
• Breaking capacity: 6 kA (EN 60898 / IEC 60947-2)
• Energy limitation class: 3
• Power loss per pole (rated current, hot state): 3.3 W
• IP 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 N·m
• Dimensions (W x H x D): 18 x 90 x 76 mm
• Installation depth: 70 mm
• Modular width: 1 unit
• Weight: 153 g
• Operating temperature: -25 °C to +45 °C
• Storage temperature: -40 °C to +75 °C
• Mounting position: any

Features and benefits:

• Halogen-free construction for reduced toxic emissions in fire conditions
• Touch protection (IP20) with connected conductors for safe installation
• Sealable design to prevent unauthorised adjustment
• Silicon-free materials, suitable for paint shop and sensitive environments
• Compatible with supplementary devices for expanded functionality
• Mechanical service life of 10 000 operating cycles

Applications:

• Final circuit protection in residential distribution boards
• Infrastructure panel protection for lighting and socket circuits
• DIN rail installations requiring 40 A single-pole overcurrent protection
• Installations where DC backup supply protection (up to 62.5 V) is required

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

Also known as: Siemens 5SL6140-7, SENTRON MCB 1P 40A C curve.