Square D FH-36025 I-Line 3-Phase Circuit Breaker

The FH36025 is Square D’s I‑Line molded‑case circuit breaker, a three‑pole, 25‑A unit designed for plug‑in mounting in I‑Line panelboards and switchboards. Rated for up to 600 VAC (and 250 VDC), it uses a thermal‑magnetic trip to protect against overloads and short circuits. Industry data for this model lists interrupting ratings of 65 kA at 240 V, 25 kA at 480 V, and 18 kA at 600 V, reflecting its suitability for a range of three‑phase applications. The breaker features a line‑side I‑Line connection with ABC phase labeling and load‑side Lugs, and accepts conductors up to 14‑4 AWG aluminum or copper. It is UL listed and part of Square D’s FH I‑Line family for industrial protection in panelboards and switchboards.