Siemens ED43B050 - 50 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens ED43B050—a 50A, 480V, 3-pole bolt-on molded case circuit breaker designed to deliver steadfast protection for modern electrical infrastructures. This unit is tailor-made for reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers, making it a trusted choice for three‑phase power systems in commercial and light industrial settings.

• Secure bolt-on mounting delivers a rigid, vibration‑resistant bus connection, ensuring consistent electrical performance even in demanding environments.
• Thermal-magnetic trip unit provides stable, repeatable protection—responding swiftly to both gradual overloads and hard short circuits while minimizing nuisance trips.
• 3-pole configuration is ideal for three-phase distribution, providing balanced protection across all phases and helping maintain system coordination.
• 480V rating enables compatibility with higher voltage distribution networks, supporting safer switching and reliable protection in commercial applications.
• OEM-friendly compatibility works seamlessly with matching Siemens OEM load centers and panelboards for straightforward installation and retrofits.
• Designed for use in residential, commercial, and light industrial environments requiring dependable branch circuit protection and quick, clear trip signals.

What problems does the ED43B050 solve?

In any setup where three-phase power feeds important loads, the ED43B050 prevents costly electrical faults by shutting down a circuit when overheating or short circuits occur. Its thermal-magnetic mechanism offers a precise balance: sensitive enough to protect and rugged enough to endure vibration and continuous operation in panelboard assemblies.

Ideal use cases

• New installations in commercial buildings where three‑phase distribution is standard and Siemens OEM panelboards are used.
• Retrofits or replacements in existing load centers needing a reliable 50A, 480V protection device with secure, bolt-on mounting.
• Electrical rooms serving light industrial equipment, HVAC systems, or processing lines where stable trip performance is critical.

Technical snapshot

• Manufacturer: Siemens
• Part Number: ED43B050
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and longevity

To maximize performance, ensure a clean, secure bolt-on connection to a compatible Siemens panelboard or load center, and follow the system’s recommended torque specifications for bolting. Regularly inspect for signs of wear or loose connections in electrical rooms, especially in busy facilities where panel doors are opened and closed frequently. By choosing the ED43B050, you’re opting for a component designed to endure the rigors of everyday operation while delivering predictable protective behavior when it matters most.