Siemens ED43B045 - 45 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens ED43B045 — a 45A, 480V, 3-pole bolt-on molded-case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. This compact, robust unit is built to safeguard 3-phase electrical systems with precision and reliability.

Key advantages that matter in the real world

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing looseness and improving long-term reliability in panels subject to vibration or movement.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying loads and temperatures — balancing quick response to faults with resistance to nuisance trips.
• OEM-compatibility is designed to pair with matching Siemens load centers and panelboards, streamlining retrofits and ensuring consistent protection throughout your system.
• Versatile applications suited for residential, commercial, and light industrial environments requiring dependable 3-pole 480V protection.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: ED43B045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who should consider the Siemens ED43B045?

• Technicians upgrading or expanding 3-phase, 480V panelboards in commercial or light industrial facilities.
• Systems where vibration or mechanical movement is a concern, and a secure bolt-on connection can prevent contact loosening.
• Installers seeking reliable, OEM-compatible protection that aligns with Siemens panelboard architectures.
• Projects involving motor loads, HVAC equipment, or other 480V circuits that require robust branch-circuit protection with precise trip characteristics.

Equip your panel with the Siemens ED43B045 to ensure durable, precise protection for your 3-phase 480V infrastructure. This bolt-on, thermal-magnetic breaker is engineered to perform consistently under real-world conditions, delivering the safety and reliability your electrical system depends on.