Siemens ED42B050 - 50 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens ED42B050 is a purpose-built 50A, 480V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit protection in demanding panelboards and loadcenters. Its robust construction and precise trip mechanism help keep critical electrical systems safe from overloads and short circuits, even in busy commercial or light industrial environments.

Why this breaker stands out

• Secure bolt-on mounting. The bolt-on design creates a rigid, vibration-resistant connection to the bus, reducing movement and ensuring consistent electrical contacts in panels subject to equipment vibration or movement.
• Thermal-magnetic trip unit. This arrangement provides stable, repeatable protection by responding to both overload currents and short-circuit events, helping prevent nuisance trips while safeguarding equipment.
• OEM-compatible performance. Engineered to work with matching Siemens OEM load centers and panelboards, simplifying replacements and maintenance without sacrificing protection or fit.
• Versatile application range. Suitable for residential-adjacent commercial settings and light industrial environments where reliable 2-pole protection at 480V is required.

Technical snapshot

• Manufacturer: Siemens
• Part Number: ED42B050
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the ED42B050 in panelboards and load centers where you need solid, reliable protection for two hot conductors at 480V. It’s a practical upgrade or replacement option in commercial spaces, small-scale industrial facilities, or any installation where vibration resistance and secure bus connections are priorities. The 2-pole design helps ensure coordinated protection for multi-wire circuits and helps maintain system stability during fault conditions.

Practical advantages and maintenance tips

• Ensure proper torque on mounting bolts during installation to preserve the integrity of the bus connection.
• Plan replacements with the OEM-compatible ED42B050 to maintain panelboard wiring harmony and trip characteristic consistency.
• Consider it as part of a panel modernization—paired with compatible Siemens load centers for streamlined serviceability and stocking.

For projects requiring durable, precise overcurrent and short-circuit protection at 480V in a compact 2-pole, the Siemens ED42B050 bolt-on molded case circuit breaker delivers dependable performance, alignment with OEM hardware, and a clear path to reliable electrical safety in commercial and light industrial installations.