Square D QMB325W - 400A, 240V, Fusible, Switch

Meet the Square D QMB325W — a robust 400A, 240V fusible switch engineered for reliable on/off isolation and precise overcurrent protection in demanding industrial and commercial settings. Its compact, maintainable design fits tight spaces without compromising safety or performance, making it an ideal choice for motor disconnects, panelboards, and branch circuit protection where dependable protection and quick accessibility matter.

Key specifications

• Model: QMB325W
• Amperage: 400A
• Voltage: 240V
• Fusible: Fusible

Why this fusible switch stands out

• Durable construction that fits where space is at a premium, simplifying panel layout and reducing footprint without sacrificing performance.
• Integrated isolation with overcurrent protection: A single unit that provides safe disconnection when maintenance is needed while protecting downstream circuits from overloads.
• Rugged reliability for tough environments: Built to withstand the rigors of industrial and commercial applications, delivering consistent operation in demanding conditions.

Ideal applications

• Motor disconnects in manufacturing lines, HVAC systems, and other equipment where safe, instant isolation is essential.
• Panelboards requiring dedicated, fusible protection to safeguard feeders and branch circuits.
• Space-constrained electrical rooms and service areas where a compact disconnect switch is preferred.

How it helps your operation

The QMB325W delivers a practical, maintenance-friendly solution that pairs the safety of immediate isolation with reliable overcurrent protection. By consolidating protection and disconnect capabilities into one unit, it reduces installation complexity and simplifies routine servicing. This translates to quicker fault response, safer maintenance procedures, and peace of mind for facilities teams managing critical electrical infrastructure.

Getting the right fit

Designed for 240V systems with a 400A rating, this fusible switch mirrors the needs of modern electrical layouts that demand robust protection without oversized hardware. Ensure compatibility with your panelboard configuration and confirm the site’s electrical standards align with a fusible disconnect solution like the Square D QMB325W.

Upgrade or specify the Square D QMB325W today to secure reliable isolation and dependable protection for demanding motor-driven and branch-circuit applications.