Leviton LB120-ST 2nd Gen Smart Circuit Breaker - Remote Control

In this review of the Leviton LB120-ST 2nd Gen Smart Circuit Breaker, the bottom line is simple: this is a practical smart breaker for homeowners who want remote control and energy insight without replacing a whole panel. The reviewer found it especially useful for DIY-friendly installations and for integrating with other Leviton smart devices. The standout reason to buy is the combination of reliable 20 A protection with remote ON/OFF control and app-based monitoring, which delivers convenience and basic home energy visibility when used with the required Whole Home Energy Monitor.

Key Features

• Smart integration: Works with the My Leviton app to provide remote ON/OFF control and circuit scheduling for convenient energy management.
• Energy insight: Provides circuit-level data when paired with Leviton's system, helping users track consumption and identify savings opportunities.
• Safety and compatibility: 10kA interrupt rating and standard 1-pole 120 VAC design offer the expected protection and fit for typical branch circuits.
• Easy installation: Plug-on installation and a design that allows the load center to be wired at rough-in make swapping or adding breakers straightforward.
• Whole-home solution: Integrates with Leviton load center products for coordinated monitoring and control across multiple breakers and devices.
• Proprietary requirement: Requires the Leviton Whole Home Energy Monitor (LWHEM) to enable full smart functionality, ensuring accurate whole-house energy data.

Who It's For

The LB120-ST is well suited for homeowners upgrading circuits to smart control, electricians fitting a Leviton load center, and DIYers comfortable working inside a panel who want app-based on/off control and basic energy monitoring. It is especially useful in households that will deploy a Whole Home Energy Monitor to realize circuit-level insights.

It is less appropriate for someone who needs a breaker that works with non-Leviton load centers or for buyers who expect full standalone smart features without purchasing Leviton's LWHEM. Also, those needing multi-pole or higher-amp solutions should look for products tailored to those loads.

Pros & Cons

Pros

• Quality build and reliable 20 A protection with a 10kA interrupt rating noted by users.
• App control and scheduling deliver real convenience for remotely managing circuits.
• Installation is straightforward, and customers report it is easy to swap into a panel.
• Integrates into a broader Leviton whole-home smart energy system for expanded insight.

Cons

• Requires Leviton's Whole Home Energy Monitor (LWHEM) for full functionality, so additional hardware is needed.
• Designed specifically for Leviton load centers, limiting use in other panels without compatible infrastructure.

Specifications

Model	LB120-ST 2nd Gen
Type	1-pole smart circuit breaker
Voltage	120 VAC
Current Rating	20 Amp
Interrupt Rating	10kA
Control	Remote ON/OFF via My Leviton app
Requirement	Requires Leviton Whole Home Energy Monitor (LWHEM)

Our Verdict

The Leviton LB120-ST is a sensible choice for homeowners and electricians who want dependable 20 A protection combined with smart remote control and circuit-level visibility when paired with Leviton's LWHEM. It represents good value for those building a Leviton-based whole-home system or who prioritize easy installation and app-based control.

Frequently Asked Questions

Do I need extra hardware to use the smart features?
Yes, the breaker requires Leviton's Whole Home Energy Monitor (LWHEM) to enable the full smart monitoring and energy data features.

Will this fit any load center?
No, the LB120-ST is designed for use with Leviton load centers and may not be compatible with other panel brands.

Is installation difficult for a DIYer?
Customers report the plug-on installation is straightforward and that the breaker is among the easier units to swap, but panel work should only be done by those comfortable and qualified to work safely with live electrical equipment.