Siemens NGB3B080 Molded Case Circuit Breaker 3Pole

Siemens NGB3B080 is a 3-pole, 80-amp low-voltage molded case circuit breaker (MCCB) from Siemens’ NGB family, designed to protect three‑phase circuits in commercial and light‑industrial power‑distribution systems. It is rated for 480Y/277 VAC and 600Y/347 VAC service, with an interrupting capacity of 25 kA at 480Y/277 VAC and 14 kA at 600Y/347 VAC, and it carries UL489 certification for use in panelboards and feeders. The thermal-magnetic trip unit provides both overload protection and short‑circuit protection, enabling reliable protection and coordination with upstream devices, while the compact 3‑pole form factor supports standard enclosure mounting and compatibility with Siemens accessories. This breaker is typically used to protect feeders and branch circuits in 3‑phase distribution systems where 480Y/277 V or 600Y/347 V service is present, delivering reliable control and safety in commercial buildings, industrial facilities, and retrofit projects.