Siemens EF3B090 – 90A 3 Pole Molded Case Circuit Breaker Special Discount

Built for legacy power systems, the Siemens EF3B090 is a 90A, 3-pole molded case circuit breaker. It provides reliable overcurrent protection for 600VAC and 250VDC commercial environments. This bolt-on breaker installs into older I-T-E and Siemens enclosures, specifically FC-1 panelboards and FC-20 switchboards. Facilities looking to upgrade can cross-reference this with the newer ED63B090 replacement. It features a fixed thermal-magnetic trip unit with a 14kAIC rating at 480VAC.