Leviton LB120-ST 2nd Gen Smart Circuit Breaker with Remote Control, Standard, 1-Pole 20 Amp, 120-Volt, 10kA Interrupt Rating

Across the reviewers we read, the Leviton LB120-ST is the only candidate in this pool that is unambiguously a code-listed smart circuit breaker rather than a DIN-rail smart relay. Discussion in r/electricians describes the 2nd Gen units as a meaningful improvement over the first generation, with energy measurement that is not strictly real-time but updates often enough to tell which circuits are pulling load. Threads in r/homeautomation and r/Homebuilding frame the broader Leviton load center as a viable way to consolidate smart switching and circuit-level monitoring into the panel itself.

Leviton's own product copy, echoed across retailer listings, emphasizes the My Leviton app integration, remote on/off, and the 10kA interrupt rating, and r/electricians commenters note that prewiring the panel before adding breakers makes future swaps fast. The most consistent friction point in the threads we read is platform lock-in: the LB120-ST only works in Leviton load centers, which verified-purchase Home Depot reviewers learned the hard way when ordering for non-Leviton panels.

Amazon's rating is high (4.8) but the sample is small at nine reviews, so the scoring leans on the specialist-community consensus rather than retailer star averages. There is no signal in this data set suggesting performance problems beyond the Gen 1 audible 'hiss' that one r/electricians thread asks whether Gen 2 has resolved.