Siemens | NGB2B090B | Circuit Breaker | 90A | 2-Pole | 600V

Designed for reliable overcurrent protection in industrial and commercial electrical systems, the Siemens NGB2B090B is a 2-pole circuit breaker with a 90-amp rating and a 600-volt capacity. Built for maintenance, retrofit, and replacement projects, this unit helps you update or restore protection where exact specifications matter.

What makes it stand out

• Precise specs you can trust: 90A nominal current, 2-pole configuration, 600V rating. Part number NGB2B090B serves as the best compatibility reference.
• Designed for modern electrical runs: With a 2-pole design, it protects both conductors in a circuit, providing coordinated protection for dual-leg feeds common in panels.
• Maintenance-friendly and retrofit-ready: This Siemens breaker is an ideal drop-in replacement for legacy equipment when the goal is to restore reliable protection without invasive rewiring or panel changes.
• Trusted brand for durable protection: Siemens brings decades of engineering to protect circuits, equipment, and people—backed by compatibility with Siemens gear and standard panel configurations that rely on NGB-series breakers.
• Simple fit-check protocol: Always confirm fit and ratings before ordering; the part number is the best reference to ensure you’re matching the exact breaker family and amperage class for your panel.

Ideal use cases

• Maintenance and service work on electrical distribution panels requiring 90A, 2-pole protection
• Retrofits and upgrades to bring older panels up to current protection standards
• Replacement in service inventories to reduce downtime when breakers trip

For optimal results, pair the NGB2B090B with compatible Siemens panels and accessories, and consult your electrical contractor to verify that mounting and connection configurations match your installation needs.