Siemens RV421 - 30A, 240V, Fusible Bus Plug

Meet the Siemens RV421 Fusible Bus Plug—a purpose-built solution for dependable power distribution in demanding industrial and commercial environments. Rated at 30A and 240V, this fusible bus plug is designed to drop into existing busway and panelboard systems, delivering quick, reliable protection and streamlined upgrades without invasive rewiring.

Why the RV421 stands out

• Direct compatibility with busway and panelboard power distribution. The RV421 is purpose-built to integrate with Siemens busway ecosystems, making retrofits and capacity upgrades faster and more reliable.
• Compact, industry-grade protection. As a fusible bus plug, it provides targeted overcurrent protection at the feeder level, helping minimize downtime and protecting downstream equipment in industrial plants and commercial facilities.
• Ideal for hard-to-find replacement needs. This model is a practical choice for maintenance and upgrade projects where compatible busplugs can be scarce, ensuring you have the right part when it matters most.
• Versatile for a range of applications. Suitable for process equipment, retrofit projects, and facility upgrades where reliable, fast-acting protection is essential.

Ideal applications

• Industrial plants seeking flexible, fault-tolerant power distribution layouts
• Commercial facilities undergoing service upgrades or capacity expansions
• Retrofit projects requiring a compatible, readily-available fusible bus plug
• Maintenance inventories that benefit from having hard-to-source parts on hand

Specifications at a glance

• Brand: Siemens
• Model: RV421
• Type: Fusible Bus Plug
• Amperage: 30A
• Voltage Rating: 240V
• Application: Busway and panelboard power distribution systems

Practical usage and installation notes

For best results, pair the RV421 with compatible Siemens busway and panelboard configurations. Plan installations during scheduled maintenance windows to minimize downtime, and verify system compatibility before swapping in the fusible plug. This part is especially valuable for retrofit scenarios where upgrading to modern protection without extensive rework is a priority.

What problems it solves

• Eliminates delays caused by hunting for compatible bus plugs during maintenance or upgrades
• Provides reliable, fast-acting overcurrent protection aligned with existing busway/panelboard infrastructure
• Supports scalable power distribution strategies in facilities that continuously evolve their equipment layouts

With the Siemens RV421, engineers and procurement teams gain a precise, dependable fusible bus plug that fits seamlessly into established power distribution networks, helping you protect critical equipment, reduce downtime, and streamline upgrade projects.