Square D FI36090 – 90A 3 Pole Molded Case Circuit Breaker Budget

Built for heavy-duty commercial applications, the FI36090 is a 90-amp, 3-pole current-limiting breaker from Square D. It actively restricts let-through energy during short circuits to safeguard downstream electrical components. Designed for I-Line panelboards, this plug-on MCCB serves as a direct replacement for older installations, though the series is succeeded by the PowerPact HRA36090U31X. It features a 200kAIC rating at 480V, thermal-magnetic protection, and a Visi-Trip indicator.