GLNP400400 GLNP400400 Circuit Breaker, 400A, 4-Pole

The GLNP400400 is a rugged circuit breaker designed for industrial electrical service, maintenance, and replacement projects. As a member of the GL series, this 400 A, 4-pole unit delivers dependable overcurrent protection in demanding environments, helping keep critical equipment online and safe.

Why this breaker stands out

• 400 A, 4-pole design provides robust protection for multi-conductor systems, ideal for larger industrial feeds and 3-phase applications.
• GL series compatibility ensures a predictable fit within GL-series panels and assemblies, simplifying procurement and installation.
• Application-focused performance engineered for service, maintenance, and replacement tasks to minimize downtime and maintain electrical reliability.
• Part-number–driven fit verification Use GLNP400400 to confirm compatibility for your specific application; verify fit by part number and your installation requirements.

Real-world use cases

Whether you're upgrading equipment on an industrial line, replacing a failed breaker, or stocking spare parts for planned maintenance, the GLNP400400 provides consistent performance and dependable protection within the GL family. The 400 A rating is well-suited for protecting feeders and major loads in mid- to large-scale industrial setups, while the four-pole design supports safe isolation across multiple conductors.

Practical tips for success

• Double-check panel compatibility by confirming the exact GL part number: GLNP400400.
• When ordering, consider pairing this breaker with your existing GL-series equipment to ensure coordinated protection and compatible trip characteristics.
• Need help confirming compatibility with your panel or application? Message us and we’ll assist with part-number matching and requirements.