Siemens 5SY4340-7 SENTRON Miniature Circuit Breaker 3P C40A 10kA

The Siemens 5SY4340-7 is a 3-pole miniature circuit breaker from the SENTRON range, rated at 40A with tripping characteristic C and a breaking capacity of 10kA at 400V AC per EN 60898. It provides overcurrent and short-circuit protection for infrastructure and industrial applications, with a supplementary rating of 15kA per IEC 60947-2.

Technical specifications:

• MLFB: 5SY4340-7
• Manufacturer: Siemens
• Product line: SENTRON
• Number of poles: 3
• Tripping characteristic: C
• Rated current: 40A
• Rated voltage: 400V AC
• Insulation voltage (Ui): 440V AC
• Breaking capacity: 10kA per EN 60898; 15kA per IEC 60947-2
• Energy limitation class: 3
• IP rating: IP20 (with connected conductors)
• Operating temperature: -40°C to +70°C
• Mounting: DIN rail, any position
• Installation depth: 70mm
• Dimensions (W x H x D): 54 x 90 x 76mm
• Weight: 465g
• Conductor cross-section: 0.75-35mm² (solid/stranded), 0.75-25mm² (finely stranded with ferrule)
• Standards: IEC/EN 60898-1, IEC/EN 60947-2

Features and benefits:

• Halogen-free and silicon-free construction
• Sealable design for tamper protection
• Touch-protected terminals on both top and bottom
• Suitable as a main switch per EN 60204-1
• Accepts supplementary add-on devices
• Wide operating temperature range: -40°C to +70°C

Applications:

• Overcurrent and short-circuit protection in industrial distribution boards
• Circuit protection in commercial and infrastructure installations
• Main switch duty in machinery per EN 60204-1
• DIN rail panel assemblies requiring class 3 energy limiting

Compliant with IEC/EN 60898-1 and IEC/EN 60947-2. Part of the Siemens SENTRON range.

Also known as: Siemens 5SY4340-7, Siemens SENTRON 3-pole C40A miniature circuit breaker.