Siemens | HFXD63B090 | Circuit Breaker | 90A | 3-Pole | 600V

Siemens HFXD63B090 Circuit Breaker is a rugged three‑phase protective device designed for reliable service in demanding electrical systems. With a 90 A rating and a maximum 600 V, this 3‑pole breaker provides precise, coordinated protection for three‑phase loads, safeguarding equipment and downstream circuits from overloads and faults.

Key specifications at a glance

• Amperage: 90 A
• Poles: 3‑Pole
• Voltage rating: 600 V
• Part number reference: HFXD63B090
• Application: maintenance, retrofit, and replacement where exact specifications are required

This device is purpose‑built for scenarios where compatibility and precise specs matter. The three‑pole design ensures simultaneous tripping across all three phases, helping protect three‑phase motors, compressors, and other high‑demand equipment from unbalanced faults and catastrophic failures. When used in right‑sized panels or switchgear, it helps maintain system stability and reduces downtime due to electrical faults.

Why this Siemens breaker stands out

• Exact compatibility cue: The HFXD63B090 part number is your strongest guide for fit in Siemens panels and enclosures designed for 3‑pole, 600 V devices. Rely on the part number to avoid mismatches during retrofit or replacement.
• Three‑phase protection: A true 3‑pole configuration delivers synchronized disconnection across all phases, minimizing arcing risks and protecting downstream equipment and wiring.
• Industry‑grade reliability: Built to withstand industrial duty, this Siemens circuit breaker supports continuous operation in environments where consistent protection is essential.

Ideal uses and scenarios

• Maintenance projects on existing three‑phase distribution or motor control centers requiring a precise 90 A, 3‑pole, 600 V device
• Retrofits where old breakers must be swapped for a Siemens unit with identical ratings
• Replacement in commercial or light industrial panels that run three‑phase motors, fans, pumps, or conveyors

Practical guidance for installation and compatibility

Before placing an order, verify fit and ratings against your panel schedule. Use the HFXD63B090 as the definitive compatibility reference, and ensure the panel, enclosure, and associated protective devices support a 90 A, 600 V, three‑pole breaker. For best results, coordinate with your electrical drawings and follow all electrical codes and manufacturer guidelines when performing replacement or retrofit work.