Square D FH-36020 I-Line 20 Amp Circuit Breaker

Square D FH-36020 is a 600-volt, three-pole I-Line molded‑case circuit breaker rated for 20 amps, designed for use in Square D I-Line panelboards. This FA‑frame device uses a thermal‑magnetic trip mechanism to protect three‑phase feeders and branch circuits, with a line‑side I‑Line connection and load‑side lugs for straightforward installation. Common applications include protecting three‑phase feeders in industrial or commercial distribution panels that use I‑Line bus systems. Rated for 20 A at up to 600 V, it lists interrupting capacities up to 25 kA at 480 VAC and up to 18 kA at 600 VAC, depending on system voltage. The FH36020 is an I‑Line style plug‑in mounting breaker (type FH) listed in catalogs and distributor listings under FH36020 and is designed to operate within Square D’s I‑Line panelboard ecosystem.