Description
Leviton R2120-B Whole-Home Surge Protective Device Guide
Quick Answer: The Leviton R2120-B is a panel-mount, Type 1 Whole-Home Surge Protective Device (SPD) designed for 120/240V split-phase residential electrical systems. It provides up to 36 kA of surge current protection per phase (18 kA per mode), features a 200 kA Short Circuit Current Rating (SCCR), and is housed in a NEMA 4X weather-resistant enclosure for indoor or outdoor installation.
Leviton R2120-B Overview & Key Features
The Leviton R2120-B is engineered to protect sensitive household electronics, smart appliances, and electrical circuits against high-voltage surges caused by power grid switching, utility events, and lightning strikes:
- Type 1 SPD Versatility: Suitable for line-side installation (before the main disconnect) or load-side installation (after the main breaker).
- Robust Surge Suppression: Thermally protected Metal Oxide Varistors (MOVs) divert dangerous high-voltage transients safely to ground.
- Real-Time LED Diagnostics: Features real-time visual Protection Status LED indicators to confirm active surge protection status across both hot legs.
- All-Weather NEMA 4X Enclosure: Constructed from UV-stabilized, water-tight, and dust-resistant enclosure material for reliable performance indoors or outdoors.
Leviton R2120-B Technical Specifications
Core performance parameters and electrical ratings for the Leviton R2120-B Surge Protective Device:
| Specification Parameter | Rating / Value | Details & Standard |
|---|---|---|
| Operating Voltage | 120/240 VAC | Single/Split-Phase, 50/60 Hz standard residential supply |
| SPD Rating Type | Type 1 / Type 2 | UL 1449 4th Edition Listed |
| Max Surge Current Capacity | 36 kA per Phase | 18 kA per Mode (L-N, L-L) |
| Short Circuit Current Rating (SCCR) | 200 kA | High-capacity short circuit protection rating |
| Nominal Discharge Current (In) | 10 kA | UL 1449 tested discharge capacity rating |
| Voltage Protection Rating (VPR) | 700V (L-N) / 1200V (L-L) | Clamping threshold voltage protection level |
| Enclosure Rating | NEMA 4X / IP66 | Weather-proof, corrosion-resistant plastic enclosure |
Installation & Mounting Guidelines
- Mounting Nipple: Attaches to any standard electrical panel using a standard 1/2" threaded conduit knockout.
- Breaker Connection (Load Side): When installed on the load side of an electrical load center, wire directly through a dedicated 20A 2-pole double-pole circuit breaker.
- Lead Length Optimization: Keep all connecting wires (Hot, Neutral, Ground) as short and straight as possible during installation to minimize impedance and optimize clamping speed.
Frequently Asked Questions
What is the difference between a Type 1 and Type 2 Surge Protector?
A Type 1 SPD (like the Leviton R2120-B) can be installed on either the line side (before the main disconnect) or the load side of the main service panel. A Type 2 SPD can only be installed on the load side of the main panel connected to a circuit breaker.
Can the Leviton R2120-B be installed outdoors?
Yes. The Leviton R2120-B features a durable NEMA 4X weather-resistant enclosure designed to protect internal components against rain, sleet, snow, dirt, and UV exposure.
How do I know if the Leviton R2120-B is working?
The unit features diagnostic LED indicators on the front panel. Green illuminated LEDs confirm that protection is active across both 120V legs. If an LED turns off, the unit has absorbed a terminal surge event and requires replacement.
Spec Sheets
Download the official manufacturer documentation and specifications:
Additional Information
Our Part No: |
BSF-LVTN-R2120-B |
Mfr Part #: |
R2120-B |
Brand: |
Leviton |
Fixture Type: |
Service Entry, HVAC |
Surge Protection: |
Split Phase |
Voltage: |
120/240V |
Protection per Mode / per Phase: |
36kA / 36kA |
Voltage Protection Rating: |
L-N: 700V, L-L: 1200V |
Product Data Sheet: |
See PDF Link Provided |
Dimensions: |
2.75" L x 2.75" W x 4.25" D |
Enclosure: |
NEMA 4X |
Warranty: |
Manufacturer's |
Case Size: |
10 |
