Siemens B380 80A 3P 240V Circuit Breaker, Bolt-On | AmpState

Meet the Siemens B380 80A 3P 240V Bolt-On Circuit Breaker—designed for reliable, immediate protection in panelboards, load centers, and broader electrical distribution systems. This is the practical choice when retrofit work or maintenance planning requires preserving an exact part number, ensuring your system stays consistent with existing configurations.

Why the B380 bolt-on design matters

• Secure, durable mounting: the bolt-on format anchors directly to the panel interior, delivering steady performance in tightly packed electrical setups.
• 3-pole protection: provides coordinated 3-phase protection for balanced distribution and smoother operation of heavy loads.
• 80 A rated: suitable for circuits that demand robust current handling while maintaining safe overload protection.
• 240V operation: optimized for common commercial and industrial distribution configurations, ensuring compatibility with standard electrical systems.
• Part number fidelity: B380 is a stable choice for retrofits and ongoing maintenance when you need to keep the same catalog number across service cycles.

Key specifications at a glance

• Manufacturer: Siemens
• Part number: B380
• Type: Circuit Breaker
• Amperage: 80 A
• Poles: 3
• Voltage: 240V
• Mounting: Bolt-On
• Availability: Available from AmpState

Ideal for whom and when to choose it

• Electrical professionals performing panelboard retrofits on Siemens installations, where maintaining exact part numbers helps with procurement and compatibility.
• Maintenance teams planning long‑term spare parts inventories to minimize downtime during service windows.
• Facilities with 3-phase loads that require reliable 80 A protection without changing the existing distribution layout.

Practical uses and setup tips

Use the Siemens B380 when upgrading or replacing aging circuit breakers in compatible panelboards and load centers. It’s particularly well-suited for retrofit projects where consistency of parts simplifies ordering and reduces compatibility risk. For installation, always follow the panel manufacturer’s instructions and local electrical codes. If you’re unsure about fit or compatibility, AmpState can help confirm the correct part number for your specific panel model.

How this compares to alternatives

Compared to plug-on breakers, the bolt-on B380 offers a robust mechanical connection that’s advantageous in retrofit scenarios where space or alignment may vary. Its 3-pole design and 80 A rating provide a straightforward path to restoring or upgrading a three-phase circuit without reconfiguring the entire distribution scheme.

Ready for purchase or need confirmation on a perfect match? AmpState is ready to assist with compatibility checks to ensure the B380 will integrate seamlessly into your Siemens-based panel system.