Description
Leviton P3120-YB Commercial Surge Protective Device Guide
Quick Answer: The Leviton P3120-YB is a heavy-duty commercial Type 1 Whole-Facility Surge Protective Device (SPD) designed for 120/208V 3-Phase Wye electrical systems. It delivers 50 kA of maximum surge current protection per phase (25 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 panel installation.
Leviton P3120-YB Overview & Key Features
The Leviton P3120-YB is specifically built to protect 3-phase commercial and light industrial electrical panels, automated systems, and high-value facility electronics against high-energy transients and power spikes:
- Type 1 SPD Versatility: Approved for line-side installation (before main service disconnect) or load-side panelboard installation.
- Commercial 3-Phase Defense: Tailored for 120/208 VAC 3-Phase Wye configuration (4-Wire + Ground).
- Heavy-Duty Suppression: Uses thermally protected Metal Oxide Varistors (MOVs) providing 50 kA surge capacity per phase.
- Real-Time LED Diagnostics: Features visual LED status monitoring per phase to verify continuous active surge protection across all lines.
- NEMA 4X Weatherproof Enclosure: Encased in a UV-stabilized, water-tight, and dust-resistant enclosure suited for indoor or outdoor mounting.
Leviton P3120-YB Technical Specifications
Core performance specs and electrical ratings for the Leviton P3120-YB Surge Protective Device:
| Specification Parameter | Rating / Value | Details & Standard |
|---|---|---|
| Operating Voltage / System | 120/208 VAC | 3-Phase Wye (4-Wire + Ground), 50/60 Hz |
| SPD Rating Type | Type 1 / Type 2 | UL 1449 4th Edition Listed |
| Max Surge Current Capacity | 50 kA per Phase | 25 kA per Mode (L-N, L-G, L-L, N-G) |
| 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) | Low clamping threshold voltage protection level |
| Enclosure Rating | NEMA 4X / IP66 | Corrosion-resistant, weatherproof plastic enclosure |
Installation & Mounting Guidelines
- Conduit Mounting Nipple: Mounts directly to 3-phase load centers or distribution panels via a standard 1/2" threaded conduit knockout nipple.
- Breaker Connection (Load Side): Connect through a dedicated 3-pole 20A circuit breaker when installed on the load side of the main service disconnect.
- Lead Length Optimization: Keep all connecting phase, neutral, and ground conductors as short, straight, and unbundled as possible to minimize lead inductance and achieve optimal clamping performance.
Frequently Asked Questions
What electrical system is the Leviton P3120-YB designed for?
The Leviton P3120-YB is designed specifically for 120/208V 3-Phase Wye (4-wire plus ground) commercial and light industrial electrical panels.
What is the difference between the P3120-YB and P2120-B?
The P3120-YB is configured for 120/208V 3-Phase Wye commercial systems, whereas the P2120-B is configured for 120/240V Split-Phase single-phase residential/commercial systems.
Can the P3120-YB be flush-mounted?
Yes. When installed in finished wall cavities, the P3120-YB can be flush-mounted using the Leviton PSURG-FLG flush mount flange kit to frame and cover the wall cutout.
Spec Sheets
Download the official manufacturer documentation and specifications:
Additional Information
Our Part No: |
BSF-LVTN-P3120-YB |
Mfr Part #: |
P3120-YB |
Brand: |
Leviton |
Fixture Type: |
Residential and light use commercial 3-phase applications |
Surge Protection: |
Three Phase WYE |
Voltage: |
208Y/120 VAC |
Protection per Mode / per Phase: |
25kA / 50kA |
Voltage Protection Rating: |
L-N: 600V, L-G: 1000V, N-G: 600V, L-L: 1000V |
Product Data Sheet: |
See PDF Link Provided |
Dimensions: |
5.02" x 2.93" x 3.25" |
Enclosure: |
NEMA 4X |
Warranty: |
Manufacturer's |
Case Size: |
10 |
