The Square D FA26020AB BU is a two‑pole, 20‑amp I‑Line molded case circuit breaker rated for up to 600 VAC (250 VDC), designed for use in distribution panels that require compact, plug‑in overcurrent protection. It provides thermal‑magnetic protection with line‑side I‑Line connections and load‑side lugs, and accepts 12 to 4 AWG aluminum or 14 to 4 AWG copper conductors. As part of Square D’s Type FA family, this 2P device delivers interrupting ratings of 25 kA at 240 VAC, 18 kA at 480 VAC, and 14 kA at 600 VAC, and is listed as 80% rated for continuous operation in typical panel configurations.
