Leviton Type 2 Surge Protectiv...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$9.88
Leviton Type 2 Surge Protective Device, 120/208VAC 3-Phase WYE

Leviton Type 2 Surge Protective Device, 120/208VAC 3-Phase WYE

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Model: 52120-M1

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

$9.88
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Leviton Type 2 Surge Protective Device, 120/208VAC 3-Phase WYE

The Leviton is a panel-mounted, Type 2 Surge Protective Device engineered for 120/208VAC 3-Phase WYE electrical systems. Built with 7-Mode surge suppression, this unit combines an integral disconnect switch with replaceable surge modules — 120-7M3 (3) and 8120-GN (1) — so protection can be restored quickly in the field after a surge event without replacing the entire device. A built-in surge counter tracks the number of transient events the device has absorbed, giving facility teams a clear window into ongoing protection performance. Classified as a Surge device type, this Leviton SPD is designed to safeguard sensitive electrical equipment, panelboards, and connected loads from voltage transients on 3-Phase WYE distribution systems.

Key Features

  • System Compatibility: Engineered for 120/208VAC 3-Phase WYE electrical distribution systems.
  • 7-Mode Protection: Type 2 panel-mounted surge protective device delivering comprehensive multi-mode surge suppression.
  • Integral Disconnect Switch: Built-in disconnect allows the device to be safely isolated for inspection or module replacement without disturbing panel wiring.
  • Replaceable Surge Modules: Includes 120-7M3 (3) and 8120-GN (1) modules, allowing fast field replacement to restore protection after a surge event.
  • Surge Counter: Integrated counter records the number of surge events, supporting proactive maintenance and performance monitoring.
  • Device Type: Surge — purpose-built as a dedicated surge protective device for panel-level installation.

Technical Specifications

  • list_batch: LEV-VARMACHINE-20260803

Typical Applications

  • Commercial and Industrial Electrical Panels
  • Panelboard and Load Center Surge Protection
  • Facilities Operating on 3-Phase WYE Power Distribution
  • Protection of Sensitive Electronics and Connected Equipment
  • Renovation and New Construction Electrical Installations

Why Leviton?

Leviton engineers surge protective devices with field-serviceable components, such as the replaceable 120-7M3 and 8120-GN modules on this unit, so protection can be restored quickly rather than requiring full device replacement. The integral disconnect switch and built-in surge counter give electrical professionals practical tools for safe servicing and ongoing performance monitoring. For 120/208VAC 3-Phase WYE installations that depend on reliable, code-conscious surge protection, Leviton's Type 2 panel-mounted SPD line is built to support dependable, professional-grade electrical work.

Manufacturer Resources

Product Specs

Device Type:
Surge
Product Type:
Surge Protective Device
Department:
Electrical
Product Group:
Wiring Devices
Flammability Class:
Rated V-2 Per UL 94
Country of Origin:
Mexico
Frequency:
50/60 hertz
Product Subgroup:
Shop All Leviton

Leviton 52120-M1 – Frequently Asked Questions

1) Which Leviton panel-mounted SPD do I order for a 208Y/120V 3-phase 4-wire panel?
For a 120/208V 3-phase WYE panel, Leviton offers two builds in this SPD line: model 52120-7M3 in a NEMA 12 enclosure, and model 52120-7CS in a Type 13 enclosure with the integral disconnect switch and surge counter. If the panel is single phase 120/240V, that is a different model (51120-1, NEMA 1), and hi-leg split phase delta and 240V 3-phase delta systems each have their own model. Match the model to the service before anything else, because an SPD built for one voltage configuration does not protect another.
2) Can I mount this Leviton surge protective device outdoors on an exterior panel?
Only the 32412-DS3 is built in a NEMA 3R enclosure, which is the rain-tight type used outdoors, and that model is configured for 120/240/120V hi-leg split phase delta service. Every other model in the line is NEMA 1, NEMA 12 or Type 13, which are indoor enclosures. If the opening is outdoors and the service is not hi-leg delta, this line does not have a model for it.
3) What is the difference between the Leviton 52120-7CS and 52120-7M3?
Both are 120/208V 3-phase WYE units. The 52120-7CS adds the integral disconnect switch and the surge counter, and comes in a Type 13 enclosure; the 52120-7M3 is the NEMA 12 build. The disconnect lets an electrician isolate the SPD for inspection or module swap without pulling panel wiring, and the counter logs how many transients the unit has absorbed, which is what a facility team uses to decide when modules need attention.
4) After a big surge hits the SPD, do I have to replace the whole unit?
No. The 120/208V WYE unit uses replaceable surge modules, 120-7M3 (three of them) plus one 8120-GN, so an electrician restores protection by swapping modules in the field rather than pulling and re-terminating the whole device. The integral disconnect on the 52120-7CS is what makes that swap safe without disturbing the panel wiring.
5) What else could I use instead of the Leviton SPD on a 208Y/120V 3-phase panel?
ZenSupply also carries the Square D Surgelogic EMD25, rated 500kA for 208Y/120V 3-phase 4-wire service, which is the direct alternative on the same system. It is worth noting the Leviton is the one that carries the field-replaceable module set and the surge counter. For a residential-style load center rather than a commercial panelboard, the Eaton BRNSURGE10 is a two-pole 10kA BR Series device, a much smaller-capacity part that mounts in a BR panel and is not a substitute for a panel-level 3-phase SPD.
6) What is the difference between a Leviton 52120-7CS surge protective device and a Square D Surgelogic EMD25?
Both are panel-level surge protective devices for 3-phase WYE power at 120/208V. The Leviton 52120-7CS covers 120/208V 3-Phase WYE in a Type 13 enclosure and carries an integral disconnect switch plus a surge counter, so a facility electrician can isolate the unit for module replacement and read the number of transient events it has absorbed. The Square D unit is from the Surgelogic line and is rated 500kA at 208Y/120V 3-Phase 4-Wire. If the drawing calls out a surge count readout and a local disconnect on the SPD itself, the Leviton is the one that carries both; if the spec is written to a 500kA per-phase surge current rating, the Surgelogic EMD25 is the part that states it.
7) Can I use an Eaton BRNSURGE10 instead of a Leviton 52120-M1 surge protective device?
They solve surge protection at different points in the system. The Eaton BRNSURGE10 is a two-pole 10kA surge protective device built for the BR Series load center, so it lands in breaker spaces inside a BR panel. The Leviton 52120-M1 is a 120V single phase panel-mounted SPD in a NEMA 12 enclosure, mounted to the panel rather than occupying breaker poles, and the Leviton line uses replaceable surge modules so protection is restored in the field after an event without changing out the device. Pick the Eaton when the panel is BR Series and you want the protection inside the loadcenter; pick the Leviton 52120-M1 when you are feeding a 120V single phase panel and need an enclosed, field-serviceable unit.
8) I need surge protection on a 240V 3-phase delta service. Will a Square D Surgelogic EMD25 work?
The Square D Surgelogic EMD25 is built for 208Y/120V 3-Phase 4-Wire, which is a WYE service, not delta. For a 240V 3-Phase Delta system the matching part is the Leviton 57240-DM3, supplied in a NEMA 12 enclosure. If the service is instead a 120/240/120V hi-leg split phase delta, the Leviton line covers that as the 32412-DS3 in NEMA 3R for outdoor or wet-location mounting and the 52412-DS3 in NEMA 12. Confirm the phase configuration at the panel before ordering, because a WYE-rated SPD does not carry the same mode connections as a delta unit.
9) What voltage and phase configurations does the Leviton Type 2 SPD line cover?
Six configurations across seven models: 120V single phase (52120-M1, NEMA 12), 120/240V single phase (51120-1, NEMA 1), 120/208V 3-phase WYE (52120-7M3 in NEMA 12, or 52120-7CS in Type 13 with disconnect and surge counter), 120/240/120V hi-leg split phase delta (52412-DS3 in NEMA 12 or 32412-DS3 in NEMA 3R), and 240V 3-phase delta (57240-DM3, NEMA 12). All of them run on 50/60 hertz systems.
10) Is a Type 2 SPD the right kind for a panelboard, or do I need a Type 1?
Type 2 is the panel-mounted class, installed on the load side of the service disconnect, which is where this Leviton SPD belongs: feeding a panelboard or load center and protecting the connected equipment downstream. Type 1 is what you use when the device must go on the line side of the service disconnect, ahead of the main. If your drawing calls for line-side installation, a Type 2 device is not a substitute.
11) What does 7-Mode surge protection actually cover on a 3-phase WYE system?
Seven-mode means the suppression paths cover every combination on a WYE service: each of the three lines to neutral, each line to ground, and neutral to ground. That matters because transients do not only arrive line-to-neutral, and a device that protects fewer modes leaves paths open into sensitive electronics on the panel. This Leviton unit is a 7-mode Type 2 device built for 120/208VAC 3-phase WYE distribution.
12) Will a BR Series plug-in surge device work in place of this panel-mounted Leviton SPD?
No, not on a commercial 3-phase panel. The Eaton BRNSURGE10 is a two-pole 10kA BR Series device, which means it plugs into a BR-style load center on single-phase breaker spaces. The Leviton units here are panel-mounted SPDs wired to a specific service configuration, including 120/208V 3-phase WYE and 240V 3-phase delta. Those are two different installations and the plug-in part cannot cover a 3-phase panel.
13) Which Leviton SPD is right for a hi-leg 120/240/120V delta service?
Two models cover hi-leg split phase delta: 52412-DS3 in a NEMA 12 enclosure for indoor and industrial mounting, and 32412-DS3 in NEMA 3R for outdoor or wet-location mounting. Same service, different enclosure, so the choice comes down to where the SPD lands relative to the weather.
14) What is a simpler surge protective device option for a small residential-style panel than a Leviton panel-mounted SPD?
The Eaton BRNSURGE10 is the lighter-duty choice. It is a two-pole 10kA surge protective device for the BR Series, so it installs into a BR loadcenter without a separate enclosure or a disconnect to wire. The Leviton units are panel-mounted surge protective devices supplied in enclosures such as NEMA 1 on the 51120-1 for 120/240V single phase, and the 3-phase members of the line add an integral disconnect and surge counter. For a single small 120/240V panel where nobody is going to be reading a surge count, the Eaton two-pole unit is the shorter install; where the job wants an enclosed device with serviceable modules, the Leviton 51120-1 is the equivalent step up.
15) Which surge protective device should I use for a 208Y/120V panel in a washdown or dusty area?
Enclosure type decides this one. The Leviton 52120-7M3 is the 120/208V 3-Phase WYE unit in a NEMA 12 enclosure, which is the dust-tight and drip-tight industrial choice, and the 52120-7CS covers the same 120/208V 3-Phase WYE service in a Type 13 enclosure with a disconnect and surge counter. The Square D Surgelogic EMD25 is rated for the same 208Y/120V 3-Phase 4-Wire service at 500kA. All three suit the same voltage; specify by the enclosure the environment demands and by whether you need the surge counter for maintenance records.
16) After a surge event, do I have to replace the whole Leviton surge protective device the way I would a plug-in breaker-style SPD?
No. The Leviton Type 2 panel-mounted SPD uses replaceable surge modules, listed as 120-7M3 (3) and 8120-GN (1), so protection is restored in the field without swapping the device, and the integral disconnect lets the unit be isolated for that work without disturbing panel wiring. The Eaton BRNSURGE10 is a two-pole 10kA BR Series device that occupies breaker positions in the loadcenter, so servicing it is a device-level swap in the panel. If you are standardizing a facility around parts a maintenance tech can restock on a shelf, the module-replaceable Leviton is the one that supports it.
17) Is the Eaton BRNSURGE10 a direct replacement for a Leviton 32412-DS3?
No, they are not interchangeable. The Leviton 32412-DS3 is a panel-mounted SPD for a 120/240/120V hi-leg split phase delta system in a NEMA 3R enclosure, which is the configuration and outdoor-rated housing a hi-leg delta service needs. The Eaton BRNSURGE10 is a two-pole 10kA BR Series device that installs in a BR loadcenter. Different mounting method, different system configuration, and no enclosure of its own. For a hi-leg delta service, stay with the delta-configured Leviton units, either the 32412-DS3 in NEMA 3R or the 52412-DS3 in NEMA 12.
18) Does this SPD work on 50Hz power for equipment we run overseas?
The Leviton SPD line is rated 50/60 hertz, so it works on either frequency provided the service voltage and phase configuration matches one of the models, such as 120/208V 3-phase WYE or 240V 3-phase delta.
19) Where is the Leviton surge protective device made?
These Leviton surge protective devices are manufactured in Mexico, which is the detail an institutional or government buyer needs when a purchase order carries country-of-origin reporting.
How fast can I get the Leviton 52120-M1 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 52120-M1 come with a warranty?
Absolutely. The Leviton 52120-M1 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 52120-M1?
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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