Leviton R2120-B Surge Protective Panel 120/240V 36kA

The Leviton R2120-B Type 1 surge protective panel is a compact residential SPD that protects 120/240 VAC split‑phase services by diverting high-energy transients up to 36kA per phase.

The R2120-B is a Leviton R Series panel designed for home service-side installation to limit damaging voltage spikes from lightning strikes, utility switching and other transient events. Its thermally protected MOVs, LED status indicators and UL 1449 listing make it a practical option where current electrical codes require point-of-service surge protection. The enclosure meets NEMA 4X for corrosion resistance and the device is sized for typical single-family or multifamily dwelling service panels.

How does this panel reduce the risk to my home electronics?

The R2120-B routes surge energy away from connected equipment through metal-oxide varistors that clamp voltage and dissipate energy. It’s rated for a maximum surge current of 18kA per mode, which translates to 36kA per phase, and its voltage protection ratings (VPR) indicate how tightly it limits transient voltages.

• 18kA per mode / 36kA per phase maximum surge current capacity
• VPR: Line-to-Neutral 700V, Line-to-Line 1200V — tighter clamping protects sensitive loads
• MCOV 180V to withstand normal system voltages without nuisance clamping

Can I install this at the service entrance and meet code requirements?

Yes — the R2120-B is a Type 1 SPD intended for service‑side installation and complies with UL 1449. It helps satisfy NEC Article 230.67 requirements for dwelling unit surge protection and the expanded 2023 NEC language for additional lodging and similar occupancies.

• Type 1 classification for service entrance mounting
• UL 1449 listed for verified performance and safety
• Designed to meet NEC 2020 and 2023 Article 230.67 installation expectations

What are the physical and electrical features I should know?

The unit is rated for split‑phase 120/240 VAC systems and includes a corrosion-resistant NEMA 4X plastic enclosure with status LEDs. Thermal protection for the MOVs and a high SCCR help maintain safe operation when exposed to high fault currents.

• 120/240 VAC, split-phase compatibility for typical residential services
• 200kA short circuit current rating (SCCR) and 10kA I‑nominal (In) rating
• NEMA 4X plastic enclosure with LED status monitoring and thermally protected MOVs

What maintenance and monitoring does the panel offer?

Built-in LED indicators provide a quick visual check of unit health so homeowners and electricians can confirm protection status without opening the enclosure. Because the MOVs include thermal protection, the device is designed to fail safely and indicate replacement when protection has been compromised.

• Front-facing LEDs show operational status at a glance
• Thermally protected MOVs reduce fire risk during component failure
• Simple visual replacement cue for routine service or after major surge events

Who is this for: The Leviton R2120-B is aimed at electricians, contractors and homeowners seeking a code-compliant, service-side surge solution for single-family homes, duplexes and small multifamily units. It suits installations that need a compact, robust Type 1 SPD with clear status monitoring and corrosion-resistant housing — particularly where meeting NEC surge-protection requirements is a priority.