Siemens ED43M020 20A 3P 480V Circuit Breaker, Bolt-On | AmpState

Meet the Siemens ED43M020, a 20A 3-pole 480V circuit breaker with bolt-on mounting, engineered for reliable circuit protection in panelboards, load centers, and electrical distribution systems. This device is built to perform where it matters—in demanding commercial and industrial setups—without complicating the replacement process.

Perfect for replacement projects and BOM alignment, the ED43M020 helps you maintain original part numbers and streamline spare-part inventories. Keeping a few on hand means faster downtime recovery and easier maintenance scheduling, all while preserving the integrity of your electrical distribution scheme.

Why the Siemens ED43M020 stands out

• Bolt-On mounting enables quick, secure installation with minimal disruption to existing panels.
• Three-pole protection designed for three-phase circuits up to 480V, delivering balanced protection across all phases.
• 20-amp rating suits branch circuits in commercial and light industrial environments, providing targeted protection without tripping nuisance levels.
• Original part compatibility—keeping the same form factor and footprint as your current setup helps preserve BOM integrity and downstream wiring alignment.
• Trusted Siemens engineering for dependable performance and long service life in distribution applications.

Ideal use cases

• Hardware refreshes in panelboards and load centers that require exact ED43M020 replacement parts to avoid re-engineering the distribution layout.
• Spare-part stocking strategies that prioritize alignment with the original part number, reducing procurement risk during maintenance outages.
• Upgrades or retrofits in 3-phase, 480V installations where trip-curve and protection needs match a 20A, 3P device.

Practical guidance

Before purchasing, verify that your equipment uses the ED43M020 footprint and that a 3-pole, 480V configuration aligns with your circuit protections. If you need confirmation on fit, AmpState offers assistance to ensure you’re selecting the correct part for your specific panel or distribution setup.

Specifications at a glance

• Amperage: 20 A
• Poles: 3
• Voltage: 480V
• Mounting: Bolt-On
• Manufacturer: Siemens
• Part Number: ED43M020
• Product Type: Circuit Breaker

Available from AmpState, the Siemens ED43M020 is the practical, specification-aligned choice for dependable protection in your three-phase 480V systems. If you’re aiming for fast, reliable replacement with BOM integrity, this bolt-on 20A 3P breaker is engineered to deliver.