Siemens HE43M045 45A 3-Pole 480 V Circuit Breaker

Meet the Siemens HE43M045 — a rugged 3-pole circuit breaker built to safeguard three-phase power at 480 V. With a 45 A current rating, this device delivers reliable overcurrent protection for higher‑demand loads while ensuring seamless compatibility with Siemens panels and enclosures.

Why choose the HE43M045 for your three-phase system

Three-phase networks require precise protection to prevent motor damage, wiring overheating, and unexpected downtime. The HE43M045 is engineered to interrupt fault currents quickly and cleanly, helping protect critical equipment such as motors, conveyors, pumps, and HVAC drives. Its Siemens pedigree means you’ll benefit from proven reliability, consistent trip characteristics, and a fit‑for‑purpose design that aligns with your existing Siemens electrical infrastructure.

Key specifications

• Current rating: 45 A
• Poles: 3
• Voltage rating: 480 V
• Part number: HE43M045

Ideal use cases

• Protection for three-phase motor circuits in manufacturing lines, processing plants, and industrial facilities
• Power distribution in commercial or light industrial environments that utilize 480 V three-phase networks
• Replacement or upgrade in Siemens panel systems to maintain consistent protection characteristics

Installation and compatibility

Designed to integrate with compatible Siemens panels and enclosures, the HE43M045 offers straightforward replacement for existing 3-pole breakers. When installing, verify that your panel is rated for 480 V three-phase operation and follow Siemens installation guidelines for wiring, clearance, and maintenance access to ensure a safe, reliable trip function.

Durability and reliability

Built for demanding industrial environments, this 45 A, 3-pole 480 V circuit breaker emphasizes durability and long-term protection. It’s designed to minimize nuisance trips and provide dependable performance in daily operation, giving you peace of mind in challenging electrical settings.