Siemens 5SY4306-7 6A 3-Pole 400 V Circuit Breaker

Meet the Siemens 5SY4306-7: a precise, compact protection device built for reliable three‑phase circuits. With a 6 A current rating and a 400 V voltage rating across 3 poles, this circuit breaker is designed to guard small to mid‑size three‑phase loads in industrial panels and commercial environments. The part number 5SY4306-7 ensures seamless compatibility within the Siemens 5SY family, delivering dependable protection without unnecessary trips.

Key specifications at a glance

• Current rating: 6 A
• Poles: 3
• Voltage rating: 400 V
• Part number: 5SY4306-7

Why this model stands out

• Coordinated 3‑phase protection: The 3‑pole design ensures all three live conductors disconnect together, safeguarding equipment from phase imbalance and unexpected energization.
• Precise, application‑focused protection: A 6 A rating targets smaller motors, pumps, and control circuits, reducing nuisance trips while still delivering solid fault protection.
• Standardized, reliable Siemens compatibility: As part of the 5SY系列, this breaker integrates smoothly with Siemens panels and accessories, simplifying installation and future servicing.
• Durable, field‑tested performance: Designed for demanding industrial environments where dependable trip behavior under fault conditions matters most.

Ideal use cases

• Protection for small three‑phase motors, conveyors, or pumps in light to medium‑duty manufacturing lines
• Control panels and electrical enclosures requiring fast, reliable automatic disconnection across all phases
• Energy‑efficient panel designs where precise current limits prevent overdraw and unnecessary downtime
• Distribution circuits in commercial settings that operate on standard 400 V three‑phase power

Practical guidance for deployment

• Verify compatibility with your Siemens installation and ensure the panel is suitable for a 5SY series device
• Pair this breaker with appropriate downstream protection to optimize fault clearance and minimize impact on non‑faulted loads
• Maintain a system log of part numbers (5SY4306-7) for seamless replacements and consistent protection across repairs

When you need dependable three‑phase protection that’s purpose‑built for 400 V networks and small‑to‑mid sized loads, the Siemens 5SY4306-7 6 A 3‑Pole 400 V Circuit Breaker delivers clear, trustworthy performance.