Square D LH molded case circuit breakers offer thermal magnetic protection with automatic opening in overload or short circuit conditions and manual opening via push-to-Trip functionality. Each pole contains thermal and magnetic sensing elements, while the 3-pole unit is designed to mount into a panel, featuring lugs for connection. The breaker has an interrupting rating of 25kA at 600VAC and 50kA at 250VDC, with UL 489, CSA, and IEC certification, as indicated by the "MB" suffix on shorter handle models.