Siemens 5SY63037 3A 3P 400V Circuit Breaker | AmpState

Meet the Siemens 5SY63037—a compact, reliable three-pole circuit breaker designed for everyday electrical protection. Rated at 3 A and 400 V, this device is purpose-built for panelboards, load centers, and general electrical distribution, delivering dependable overcurrent protection when it matters most.

Designed for professionals who rely on precise part-number accuracy, the 5SY63037 is a smart choice for maintenance teams, panel builders, and spare inventory where a direct match matters. With this exact Siemens part number baked in, you’ll experience straightforward installation, faster replacements, and fewer compatibility headaches in the field.

Why this breaker stands out

• Direct part-number compatibility: 5SY63037 ensures a perfect fit in existing Siemens installations, reducing the guesswork during replacement or stocking.
• Three-pole protection: A single device safeguards three conductors, simplifying wiring schemes in multi-line circuits and keeping panel layouts tidy.
• 3 A rating at 400 V: Precisely matched to smaller, individual circuits within a broader distribution setup, helping you calibrate protection to the load.
• Versatile deployment: Ideal for panelboards, load centers, and various electrical distribution applications where reliable circuit protection is essential.
• AmpState sourcing and support: Available through AmpState, with proactive help to confirm fit if you’re verifying compatibility against your equipment.

Use cases and practical scenarios

This Siemens breaker is well-suited for control panels, feeders in commercial spaces, and small branch circuits where precise current protection is critical. It’s also a solid choice for spare-inventory kits, ensuring you can quickly replace a failed unit with the exact same part number, minimizing downtime and mismatch risk on critical installations.

How to verify fit and installation tips

To ensure correct replacement, compare your equipment’s documented part number with 5SY63037. Confirm that the device is intended for a 3-pole, 400 V system and that the 3 A rating aligns with the protected circuit. If you’re unsure about compatibility, send a quick message for expert assistance in confirming fit.

Specifications at a glance

• Manufacturer: Siemens
• Part number: 5SY63037
• Product type: 3-pole circuit breaker
• Amperage rating: 3 A
• Poles: 3
• Voltage rating: 400 V