The Schneider Electric EZEUVRN440AC is an undervoltage release (UVRN type) designed for the EasyPact EZC250 and EZCV250 circuit breaker frames. It operates on a 440 V AC control circuit at 50/60 Hz, with a trip threshold of 0.35 to 0.7 x Un and a closing threshold of 0.85 x Un.
Mounts internally to the EZC250 or EZCV250 breaker housing. The pre-wired auxiliary connection accepts 0 to 0.5 mm² wire. Inrush draw is 5 VA at pickup. The 0.35 to 0.7 x Un dropout band means the release trips before the contactor coil drops out — sequencing the breaker open ahead of downstream contactors on a sagging bus.