Siemens | NGB3K090B | Circuit Breaker | 90A | 3-Pole | 600V | Bolt-On

Siemens NGB3K090B is a robust 90A, 3-pole circuit breaker designed for demanding 3-phase applications, with a 600V rating and bolt-on mounting. Built to withstand industrial environments, this unit is tailor-made for maintenance, retrofit, and replacement projects where exact specifications matter.

• Amperage: 90 A
• Poles: 3-Pole (three-phase protection)
• Voltage rating: 600 V
• Mounting style: Bolt-On
• Part number: NGB3K090B

For professionals handling panel upgrades or service work, this breaker delivers dependable overcurrent protection in heavy-load, three-phase circuits. The bolt-on design means faster, secure installation into compatible Siemens panels, reducing downtime during maintenance or retrofits without sacrificing performance or safety.

Use cases and real-world scenarios

• Maintenance in industrial control panels that rely on bolt-on breakers within the Siemens NGB family.
• Retrofit projects upgrading existing circuits to 90 A protection in 3-phase, 600V systems.
• Replacement for worn or failed breakers in compatible 3-pole, 600V installations.

Important compatibility note: Confirm fit and ratings before ordering. The NGB3K090B part number is your best reference to ensure the breaker matches your panel’s specifications and mounting requirements.

Why choose this Siemens breaker? It pairs trusted Siemens engineering with a straightforward bolt-on installation, delivering reliable interruption protection for motors, drives, and distribution paths in industrial environments. By matching the exact specifications—90 A, 3-Pole, 600V, Bolt-On—you minimize the risk of misfits and downtime, and you simplify future service or replacements.