Siemens | BP421 | Fusible Bus Plug | 30A | 240V

Siemens BP421 Fusible Bus Plug — 30A / 240V is a purpose-built protection component designed for maintenance, retrofit, and replacement in compatible Siemens switchgear. With a clear focus on reliability and compatibility, BP421 delivers a straightforward, plug-in solution when you need to protect critical 30A circuits at 240V.

Key specifications

• Amperage: 30A
• Voltage: 240V
• Part number: BP421
• Notes: Confirm fit and ratings before ordering. The BP421 part number is the best reference for compatibility.

Why choose the Siemens BP421?

• This fusible bus plug is designed for integration with compatible Siemens gear, ensuring predictable protection and reliable operation.
• Minimizes downtime during service. The plug-in design enables faster maintenance, retrofit, or replacement without extensive disassembly.
• Clear compatibility reference. Rely on the BP421 part number to verify fit within your current configuration, reducing the guesswork that often comes with spare parts.
• Reliable overcurrent protection. With a defined 30A rating at 240V, it helps safeguard equipment and downstream circuits from faults and overloads.

Ideal use cases

• Routine maintenance on Siemens panels and switchgear that require a compliant fusible bus plug replacement.
• Retrofit projects where an updated protection module must match existing 30A, 240V specifications.
• Replacement of worn or failed bus plugs to restore original protection and performance.

Practical guidance for ordering and installation — Always verify fit and ratings before purchasing. Use the BP421 part number as the primary reference to ensure compatibility with your equipment. When installing, handle with care to maintain insulation integrity and ensure secure connections, preserving the protection performance and safety of the overall electrical system.