Siemens ED42B125L - 125 A, 480 V, 2-Pole Circuit Breaker | AmpState

The Siemens ED42B125L is a 2-pole molded case circuit breaker engineered for reliable branch circuit protection in panelboards and loadcenters. At 125A and 480V, it delivers robust protection for both everyday circuits and higher-demand installations, all while preserving valuable panel space with its compact molded-case design.

• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overcurrent and short-circuit conditions, helping prevent nuisance trips and equipment damage.
• Space-efficient, molded-case design maximizes panel capacity, making it ideal for crowded electrical enclosures or retrofit projects where every inch matters.
• OEM-compatible—paired with matching Siemens OEM loadcenters and panelboards for seamless compatibility, easier upgrades, and reliable performance.
• Versatile protection for multiple sectors—suitable for residential, commercial, and light industrial applications where dependable circuit protection is essential.

Designed to guard two hot conductors, the ED42B125L delivers effective branch circuit overcurrent and short-circuit protection at the voltages your equipment requires. Its 125A rating makes it a practical choice for feeders, subpanes, or circuits that demand solid protection without oversized components.

Key specifications at a glance:

• Manufacturer: Siemens
• Part Number: ED42B125L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Voltage Rating: 480V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Who should consider the ED42B125L? electricians and facilities managers tackling panel upgrades, new commercial installations, or residential projects where space is tight but protection must be rock solid. If you’re replacing an aging breaker or expanding a panel, this unit’s compatibility with Siemens OEM loadcenters helps you maintain consistent performance and a clean, code-compliant setup.

Practical tips for optimal results:

• Verify that your panelboard or loadcenter is compatible with the ED42B125L’s 2-pole, 125A, 480V profile before purchase.
• Follow standard electrical practices for mounting and wiring inside the enclosure to ensure proper clearance and ventilation for reliable operation.
• Pair with the appropriate Siemens accessories and fitments to maintain system integrity and simplify future maintenance.

In short, the Siemens ED42B125L provides precise, durable protection where it’s needed most—two-pole coverage for two hot lines, compatible with Siemens OEM panels, and a design focused on space efficiency and long-term reliability. It’s a smart, practical choice for ensuring electrical safety and consistent performance across residential, commercial, and light industrial environments.