Siemens ED42B045L - 45 A, 480 V, 2-Pole Circuit Breaker | AmpState

Siemens ED42B045L is a 45A, 480V, 2-pole molded case circuit breaker crafted for reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. This unit is built to integrate cleanly into existing 480V distribution, delivering predictable protection where it matters most.

• Space-efficient, molded case design maximizes usable panel area, making it ideal for compact electrical enclosures and crowded service panels.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding quickly to short-circuit events while minimizing nuisance trips during normal load surges.
• OEM-compatible construction is designed to pair seamlessly with matching Siemens OEM loadcenters and panelboards for consistent fit and performance.
• Versatile application suitable for residential, commercial, and light industrial installations where 480V distribution is used.

Technical Specifications

• Manufacturer: Siemens
• Part Number: ED42B045L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45 A
• Voltage Rating: 480 V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker is the right choice

For panel upgrades or new installations where 480V distribution is required, the ED42B045L delivers dependable protection without sacrificing space or compatibility. Its compact form factor reduces enclosure depth and allows smarter, cleaner bus arrangements. The thermal-magnetic protection profile provides a clear, defined trip characteristic, helping electricians diagnose faults quickly and restore service with confidence. With OEM-ready compatibility, you can trust consistent performance across Siemens panelboards and loadcenters, reducing the need for mismatched components and rework.

Ideal use scenarios

• Upgrading or refurbishing commercial electrical panels that feed 480V equipment and motors
• Providing reliable protection for lighting and receptacle feeders in mid-size facilities
• Protecting small industrial machinery and subcircuits within panelboards and loadcenters
• Replacing aging breakers in existing Siemens installations to maintain system integrity

Installation and maintenance tips

• Confirm compatibility with your OEM loadcenter or panelboard before installation.
• Follow standard mounting procedures and torque specifications from Siemens to ensure secure, reliable connection.
• After replacement, verify proper clearance and trip operation according to your panel’s service practices.

Equip your electrical distribution with the Siemens ED42B045L—a precise, space-conscious, and dependable solution for 45 A at 480 V in a 2-pole mold, available from AmpState.