Schneider Electric FH16020B I-Line Thermal Magnetic Circuit Breaker

Schneider Electric FH16020B is a 1‑pole, 20‑amp I‑Line thermal‑magnetic molded‑case circuit breaker designed for 277 VAC circuits in Square D I‑Line panelboards. It uses a thermal‑magnetic trip mechanism to protect against overcurrent and carries an interrupting rating of 25 kA at 277 VAC (65 kA at 240 VAC in some catalog references). The unit accepts line‑side I‑Line connections with phase option B and load‑side lug terminals for copper or aluminum conductors. This FH‑series device is a plug‑in, single‑pole breaker intended for protecting feeder circuits in commercial/industrial electrical distribution.