Leviton Surge Protective Devic...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$10.14
Leviton Surge Protective Device Panel, 120/208V 3-Phase WYE, NEMA 3R

Leviton Surge Protective Device Panel, 120/208V 3-Phase WYE, NEMA 3R

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Model: 42120-1

In Stock (leaves warehouse same day if ordered before 3pm ET)

$10.14
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Leviton Surge Protective Device Panel, 120/208V 3-Phase WYE, NEMA 3R

The Leviton Surge Protective Device Panel is engineered for 120/208V 3-Phase WYE and 220V 3-Phase Delta electrical systems, delivering robust transient voltage surge suppression for demanding commercial and industrial environments. Built with Enhanced Noise Filtering to improve power quality and housed in a NEMA 3R Enclosure for outdoor and wet-location durability, this surge panel is UL 1449 4th Edition Type 2 listed, confirming it meets rigorous industry safety and performance standards. It is a dependable choice for facilities that require code-compliant surge protection across multiple voltage configurations.

Key Features

  • Dual Voltage Configuration: Supports 120/208V 3-Phase WYE and 220V 3-Phase Delta systems, providing flexible surge protection across common commercial power configurations.
  • Enhanced Noise Filtering: Reduces electrical line noise for cleaner, more stable power delivery to connected equipment.
  • NEMA 3R Enclosure: Rated enclosure construction suitable for outdoor and wet-location installations, protecting internal components from the elements.
  • Surge Protective Device Type: Classified as a Surge device, designed to divert transient voltage spikes away from connected electrical loads.
  • UL 1449 4th Edition Type 2 Listing: Certified to the latest UL surge protective device standard for verified safety and performance.
  • Panel-Mounted Design: Configured for integration with 3-phase electrical distribution panels in commercial and industrial applications.

Certifications & Compliance

  • UL 1449 4th Edition Type 2 Listed
  • NEMA 3R Rated Enclosure for Outdoor and Wet-Location Use

Technical Specifications

  • Device Type: Surge
  • Voltage Configuration: 120/208V 3-Phase WYE, 220V 3-Phase Delta
  • Enclosure Rating: NEMA 3R
  • Listing: UL 1449 4th Edition Type 2
  • list_batch: LEV-PREEXIST-20260803

Typical Applications

  • Commercial and Industrial Electrical Panels
  • Surge Protection for 3-Phase Power Distribution Systems
  • Outdoor and Wet-Location Electrical Installations
  • Panelboard and Load Center Surge Suppression
  • New Construction and Electrical Retrofit Projects

Why Leviton?

Leviton designs surge protective devices like the to deliver reliable, code-compliant performance for demanding 3-phase electrical environments. With UL 1449 4th Edition Type 2 listing, a NEMA 3R rated enclosure, and Enhanced Noise Filtering, this surge panel is built to protect critical electrical systems and equipment from transient voltage events in both indoor and outdoor commercial installations.

Manufacturer Resources

Product Specs

Device Type:
Surge
Product Type:
Surge Protective Device
Listing:
UL 1449 4th Edition Type 2
Department:
Electrical
Product Group:
Wiring Devices
Short Circuit Current:
100 kiloamps
Storage Temperature:
-20 To 85 degrees celsius
Flammability Class:
Rated V-2 Per UL 94
Connection Type:
Parallel
Country of Origin:
Mexico
Frequency:
50/60 hertz
Warranty Length:
5 years
Operating Temperature:
-10 degrees celsius
Product Subgroup:
Shop All Leviton

Leviton 42120-1 – Frequently Asked Questions

1) Can this Leviton surge panel be mounted outdoors next to the service equipment?
Outdoor mounting is what the enclosure is rated for. The 42120 surge panel comes in a NEMA 3R enclosure, suitable for outdoor and wet-location installation. Storage range runs -20 to 85 degrees C, with an operating temperature spec of -10 degrees C, so cold-climate exterior walls are within its stated range.
2) Is this SPD wired in-line with the load or tapped off the panel?
Parallel. The 42120 is a parallel-connected surge protective device, so it taps off the busbar or a dedicated breaker rather than carrying load current through it. That means no amperage derating on the feeder and the panel keeps working if the SPD is taken out of service. Keep the lead length short, which is the usual practice for a parallel SPD.
3) Does the Leviton 42120 meet code for installation on the load side of the service disconnect?
It is UL 1449 4th Edition Type 2 listed, which is the classification for a device installed on the load side of the service disconnect overcurrent device, typically at a panelboard or load center. Type 1 devices are the ones permitted on the line side without an overcurrent device ahead of them.
4) What is the closest equivalent to the Leviton 42120 surge panel for a 208Y/120V 3-phase 4-wire service?
The Square D Surgelogic surge protective device is built for 500kA 208Y/120V 3-phase 4-wire systems, which is the same service the Leviton 42120 covers with its 120/208V 3-Phase WYE configuration. The Leviton 42120 is a parallel-connected surge device with a 100 kiloamp short circuit current rating and UL 1449 4th Edition Type 2 listing, and it also supports 220V 3-Phase Delta, so it is the choice when one part number has to serve both WYE and Delta panels on a site. The Surgelogic is the straight WYE-only alternative at a higher surge current rating.
5) Can I use an Eaton BRNSURGE10 instead of the Leviton 42120 surge panel?
They solve different problems. The Eaton BRNSURGE10 is a two-pole 10kA surge protective device in the BR Series, meaning it lands in two breaker spaces of a BR loadcenter and protects a single-phase feed. The Leviton 42120 is a 3-phase surge panel for 120/208V WYE and 220V Delta distribution with a NEMA 3R enclosure for outdoor and wet-location mounting, connected in parallel to the panel. If the equipment being protected is fed from a 3-phase panelboard, the breaker-style Eaton unit is not a substitute for it.
6) What short circuit current rating does this Leviton surge panel have?
100 kA. That SCCR lets the 42120 be applied at commercial and industrial panelboards where the available fault current at the bus is high, which is where a lower-rated residential SPD would be disqualified.
7) Difference between the Leviton 42120 panel and a Square D Surgelogic or Eaton BR breaker-style SPD?
Three different jobs. The Leviton 42120 is a NEMA 3R enclosed, parallel-connected panel SPD for 120/208V WYE and 220V Delta. The Square D Surgelogic EMD25 is also a 3-phase unit, listed for 208Y/120V 3-phase 4-wire at 500kA. The Eaton BRNSURGE10 is a BR Series two-pole 10kA device that clips into a BR load center, so it is a single-phase, breaker-slot solution rather than an enclosed 3-phase panel. Pick the Leviton or the Square D for 3-phase distribution; the Eaton is for a BR residential or light commercial panel.
8) Which Leviton 42120 part number do I order?
Two configurations are sold: 42120-1 and 42120-DY3. Order by the configuration that matches your system, since the family covers both 120/208V 3-Phase WYE and 220V 3-Phase Delta. Confirm the service voltage and configuration at the panel before you release the order, because the two are not interchangeable once installed.
9) Which surge device should I specify for an outdoor pad or exterior wall location?
The Leviton 42120 is housed in a NEMA 3R enclosure rated for outdoor and wet-location installation, with a storage temperature range of -20 to 85 degrees celsius and V-2 flammability rating per UL 94. The Eaton BRNSURGE10 is a two-pole BR Series device that mounts inside a loadcenter and relies on that enclosure's rating, and the Square D Surgelogic is specified for 500kA 208Y/120V 3-phase 4-wire service. For an exposed exterior mount on a 3-phase feed, the self-enclosed NEMA 3R Leviton unit is the one carrying its own outdoor rating.
10) Does this Leviton surge panel do anything for electrical noise, or only spikes?
Both. Beyond diverting transient voltage spikes away from connected loads, the 42120 includes Enhanced Noise Filtering to reduce line noise. That matters where sensitive electronics, VFDs, or control gear are downstream and power quality, not just surge survival, is the concern.
11) What is the enclosure flammability rating on the Leviton 42120 surge device?
Rated V-2 per UL 94. That is the material flammability classification for the device housing, and it is the kind of detail a spec reviewer or institutional facilities engineer asks for when the SPD sits inside an electrical room with defined material requirements. The unit is made in Mexico.
How fast can I get the Leviton 42120-1 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Leviton 42120-1 come with a warranty?
Absolutely. The Leviton 42120-1 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Leviton 42120-1?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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