Siemens 3NP4376-1CG01 - 400A, 690V, Disconnect Switch

Meet the Siemens 3NP4376-1CG01, a rugged disconnect switch built for demanding industrial and commercial environments. This 400A, 690V unit delivers reliable on/off isolation and precise overcurrent protection, helping you keep motors and power distribution safe, controlled, and downtime-ready.

Key specifications: Model 3NP4376-1CG01, 400A rating, 690V capacity. Designed as a compact, maintainable fusible switch, it fits tighter panel layouts while providing robust disconnection and protection where it matters most.

• Compact, maintainable design — streamlined footprint to maximize panel space and simplify routine servicing or fuse replacement.
• Reliable isolation — dependable on/off control that ensures safe startup and shutdown of connected equipment, reducing risk during maintenance.
• Integrated overcurrent protection — built to safeguard circuits against faults, helping prevent damage to motors, wiring, and downstream devices.
• Industrial-grade durability — engineered to perform under the stresses of busy plant floors and commercial facilities.
• Ease of integration — ideal for motor disconnects, panelboards, and branch circuit protection in 690V systems, compatible with standard protection schemes in Siemens portfolios.

Ideal applications

• Motor disconnects in manufacturing lines, pumps, conveyors, and other heavy-duty equipment
• Panelboard isolation points for centralized control and quick maintenance access
• Branch circuit protection where a compact fusible switch is preferred for space and serviceability

Why choose this model — the Siemens 3NP4376-1CG01 combines a solid 400A rating with a 690V operating envelope in a compact package, offering a practical balance of performance and space efficiency. Its fusible switch design supports straightforward upkeep and targeted protection, making it a practical alternative to bulkier or less adaptable solutions in demanding installations.

Practical tips for getting the most out of your disconnect switch

• Plan panel layouts to leverage the unit’s compact footprint, leaving clear access for safe operation and maintenance.
• Pair with compatible protection relays and motor starters to create a cohesive protection scheme that enhances safety and reliability.
• Schedule regular inspections of the switching mechanism and fuse elements to ensure uninterrupted performance in peak load conditions.