Siemens VMS325B – 400A, 3-Pole Main Switch – Vacu-Break Series

Introducing the Siemens VMS325B — a rugged 400 A, 3-pole main switch from the Vacu-Break Series. Built for panelboards and switchboards, this unit delivers dependable load isolation and precise overcurrent protection where it matters most in industrial power distribution.

As a key component of Siemens’ Vacu-Break family, the VMS325B is engineered to withstand the demands of demanding environments while integrating smoothly into standard switchgear architectures. It acts as the main control point for feeders, enabling rapid, decisive isolation during maintenance or fault conditions to protect equipment and improve system reliability.

Key advantages

• 400 A, 3-pole configuration: robust capacity for main feeders and essential distribution paths in large panels.
• Panelboard and switchboard readiness: specifically designed to fit into common industrial electrical layouts where reliable isolation is critical.
• Vacu-Break lineage: part of Siemens’ trusted Vacu-Break family, known for durable operation and consistent performance in demanding settings.
• Precise load isolation: enables safe maintenance, reduces the risk of fault propagation, and supports dependable power distribution.

Ideal applications

• Industrial panelboards and switchboards that require a dependable main isolation switch and overcurrent protection.
• Factories, plants, and process environments where large feeders need reliable, centralized switching capability.
• New installations or retrofits where Siemens Vacu-Break technology aligns with existing switchgear and maintenance practices.

With the Siemens VMS325B, you’re choosing a purpose-built main switch that prioritizes dependable operation, straightforward integration, and targeted protection for high-demand electrical distributions. It’s a practical, long-term solution for anyone designing, building, or maintaining robust industrial power systems.