Siemens ED42B045 - 45 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens ED42B045 is a 45A, 480V, 2-pole bolt-on molded case circuit breaker designed for dependable branch circuit protection in panelboards and loadcenters. Built to endure the demands of commercial and light industrial environments, this breaker delivers precise, repeatable protection while withstanding the vibrations and transitions common in active electrical rooms.

Why the ED42B045 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing loosened contacts and maintenance needs in busy electrical panels.
• Thermal-magnetic trip unit delivers stable protection by coordinating overload protection with instantaneous magnetic tripping for short-circuit events, helping to minimize electrical faults and equipment damage.
• 2-pole design for 480V systems ideal for protecting two hot conductors in commercial and light industrial circuits, with reliable interruption at fault conditions.
• OEM compatibility designed to work seamlessly with matching Siemens OEM loadcenters and panelboards, simplifying installations and future servicing.
• Versatile application suitable for residential, commercial, and light industrial settings, offering a robust solution for a range of distribution needs.

Technical snapshot

• Manufacturer: Siemens
• Part Number: ED42B045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

• Upgrading or modularizing 480V distribution in commercial panelboards where a secure bolt-on connection reduces service interruptions.
• Installing or expanding light industrial electrical rooms requiring reliable short-circuit protection for dual-line circuits.
• Replacing aging breakers in Siemens OEM loadcenters to maintain compatibility and performance without incompatible aftermarket parts.
• Designing panels for environments with vibration or mechanical movement where a sturdy bolt-on mount minimizes connection loosening.

What problems it solves

• Prevents nuisance trips and equipment damage by delivering precise overcurrent and short-circuit protection tailored to 480V two-pole circuits.
• Reduces maintenance overhead with a secure bolt-on installation that stays reliable under vibration and operational wear.
• Ensures compatibility and streamlined servicing with Siemens OEM panelboard ecosystems, avoiding integration headaches.

Whether you’re outfitting a new 480V distribution scheme or upgrading an existing Siemens panelboard, the Siemens ED42B045 delivers dependable protection, straightforward installation, and industry-aligned performance. Leverage its robust thermal-magnetic protection, secure mounting, and OEM compatibility to keep electrical systems safe, compliant, and ready to support your workflow.