Siemens | HE3A045 | Circuit Breaker | 45A | 3-Pole | 480V | Bolt-On

Siemens HE3A045 Circuit Breaker — a robust 3-Pole, 45 Amp, 480-Volt bolt-on protection solution designed for reliable safeguarding of commercial and industrial electrical panels.

Key specs at a glance:

• Amperage: 45 A
• Poles: 3-Pole
• Voltage rating: 480 V
• Mounting: Bolt-On
• Part number: HE3A045

Why this matters: For any upgrade, retrofit, or replacement in a 3-phase system, matching the exact part number ensures proper trip characteristics, correct panel fit, and uninterrupted protection for feeders and branch circuits. The HE3A045 is specifically designed for bolt-on installation in panels that require a 3-pole 480V breaker with a 45A rating, delivering dependable performance in demanding environments.

Ideal use scenarios:

• Maintenance and retrofit projects in facilities that operate on 480V three-phase power (manufacturing floors, data centers, commercial buildings).
• Replacement in Siemens-compatible panels where the original equipment specifies the HE3A045 for fit and ratings.
• Protection upgrades for motor feeders, pumps, and HVAC systems within industrial settings.

How to ensure a perfect fit (practical guidance):

• Confirm your panel requires a 3-pole bolt-on breaker with a 480V rating and a 45A current rating.
• Use the HE3A045 part number as the primary compatibility reference when ordering.
• Check your enclosure’s mounting configuration and bus arrangement to ensure straightforward bolt-on installation.

With Siemens, you’re choosing a component built for reliability in demanding environments. The HE3A045 provides a precise, match-specific option for maintenance outages, replacements, and retrofits where exact specs matter, helping you maintain system uptime and electrical safety.