Siemens ET4037 100A 3P 600V Circuit Breaker | AmpState

Siemens ET4037 is a 100 A, three-pole, 600 V circuit breaker designed to guard panelboards, load centers, and electrical distribution systems. This exact part is ideal for replacement projects and stocking spares, helping you keep your bill of materials aligned to the original part number.

• Three-pole design provides reliable protection for three-phase circuits in distribution panels.
• 100 A rating suitable for main or branch protection within standard electrical systems.
• 600 V maximum compatibility for commercial and industrial installations.
• Original Siemens part number ET4037 ensures seamless substitutions in equipment specified to this model, reducing fit issues and downtime.
• Replacement-ready and spare-friendly— ideal for maintaining BOM fidelity and ensuring quick project turnarounds.
• AmpState availability— easy procurement through AmpState with support to confirm fit.

This breaker is ideal for electrical professionals, facilities managers, and maintenance teams who work with Siemens-compatible panelboards, load centers, and distribution networks. It helps you preserve original designs and ensure dependable protection where it matters most.

Use cases:

• Replacing a worn or tripped breaker in an existing Siemens-equipped panel without risking mismatched parts.
• Stocking a spare ET4037 to keep your BOM intact during panel upgrades or routine maintenance.
• Replicating original equipment configurations in new builds where Siemens components were specified.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Practical tips for installation and care:

• Verify that your panel and circuits are aligned with a 100 A, 600 V specification before installation.
• Coordinate with a licensed electrician to ensure proper mounting and wiring in accordance with local electrical codes.