Siemens 5SY4202-7 2A 2-Pole 400 V Circuit Breaker

Designed for precise protection in 400V electrical systems, the Siemens 5SY4202-7 is a 2-pole circuit breaker engineered to safeguard your critical circuits with a reliable 2 A rating. Built to integrate seamlessly with Siemens 5SY-compatible panels, this part number 5SY4202-7 delivers dependable overcurrent protection where you need it most, from control cabinets to small distribution circuits in industrial environments.

Core specifications

• Part Number: 5SY4202-7
• Current rating: 2 A
• Poles: 2
• Voltage rating: 400 V
• Brand: Siemens
• Compatible with Siemens 5SY panel configurations

Why the 2-pole design matters

The dual-pole configuration disconnects both conductors simultaneously, ensuring a safe, balanced shutdown in 400V circuits. This reduces arc fault risk and protects both the protected load and the broader distribution network when a fault occurs.

Ideal use cases

Perfect for industrial or commercial control panels, automation cabinets, and small-machinery circuits that require dependable protection at a modest current level. It’s also an excellent replacement part for existing Siemens 5SY installations, helping maintain consistent protection across your 400V network.

Practical tips for selection and installation

• Verify that your panel accepts Siemens 5SY breakers and that the bus connection is compatible with a 2-pole unit.
• Match the current rating to the protected circuit’s needs; 2 A is ideal for low-load control circuits, sensors, and auxiliary equipment in 400V systems.
• Keep a spare 5SY4202-7 on hand to minimize downtime in mission-critical control panels.
• Follow standard electrical safety practices during installation and ensure secure termination of conductors according to your panel’s torque specifications.