Siemens HMX3U800 800A 3-Pole 600 V Circuit Breaker

Siemens HMX3U800 800A 3-Pole 600 V Circuit Breaker (Part No. HMX3U800) is engineered for demanding industrial and commercial power distribution. With an 800‑amp current rating, this three-pole breaker provides reliable overcurrent protection for large panels and feeders, helping to safeguard equipment and maintain uptime in high-load environments.

Key specifications at a glance

• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HMX3U800

Why this Siemens circuit breaker stands out

Designed to integrate into Siemens‑based power systems, the HMX3U800 is built to endure the rigors of industrial operation. It provides dependable overcurrent protection for large feeders and main disconnects, helping to:

• Prevent damage from overloads and short circuits in high‑demand facilities
• Support safer maintenance by enabling reliable isolation of faulted sections
• Fit within standard Siemens electrical distribution configurations for streamlined installation

Ideal use cases

• Main service disconnects in industrial or heavy commercial panels where 800 A protection is required
• High‑capacity feeder protection for manufacturing lines, data centers, or large machinery rooms
• Replacement part within existing Siemens HMX series installations to maintain system reliability

Practical considerations and best practices

For optimal performance, ensure appropriate enclosure compatibility and professional installation in accordance with local electrical codes. This component is intended for use in appropriate Siemens‑designed systems and protective schemes, where precise coordination with upstream protection and downstream circuits is maintained.

Ready to reinforce your power distribution with trusted Siemens reliability? The HMX3U800 delivers straightforward, strong protection for 600 V systems demanding high‑current capability.