Eaton SPM120480Y4R Surge Protection Device - UL 1449
Part Number: SPM120480Y4R
Quick Summary
Eaton SPM120480Y4R surge protection device protects industrial electrical systems from transient overvoltage. Operators and maintenance teams continually grapple with damaging spikes that threaten uptime, making reliable protection essential. This unit is UL 1449 listed and housed in a rugged NEMA 4 enclosure, ensuring durable performance in harsh environments. With a 120 kA per phase rating and 277/480 V Wye configuration (4W + G), it guards critical loads across data centers, manufacturing lines, and panels. The SPD Max family blends protection with easy maintenance, including an internal circuit breaker that simplifies service and compliance workflows. By leveraging Eaton's Power Xpert platform, you gain predictable protection, faster installation, and a lower total cost of ownership.
Product Information
Extended Description
SPM120480Y4R Eaton: Eaton SPD Max series surge protection device, SPD Max Series, 120 kA per phase, 277/480 Wye (4W + G), Power Xpert SPD, NEMA 4 with internal circuit breaker
Product Name
Eaton SPD MAX series surge protection device
Catalog Number
SPM120480Y4R
UPC
786689409852
Product Length/Depth
9.5 in
Product Height
17.05 in
Product Width
15 in
Product Weight
52 lb
Certifications
UL 1449
Voltage rating
277/480 Wye (4W+G)
Surge current
120kA per phase
Feature: 120 kA per phase surge rating → Business Impact: High-energy transients are diverted quickly, reducing insulation stress and extending equipment life → Application: Data centers and manufacturing lines where large spikes are common. Feature: 277/480 V Wye (4W + G) configuration → Business Impact: Compatible with prevalent industrial distribution systems, minimizing rewiring and errors → Application: Panels and distributors serving mixed-load facilities. Feature: UL 1449 listed with NEMA 4 enclosure → Business Impact: Compliance-ready, rugged protection resistant to dust and water ingress, enabling outdoor and harsh-site use → Application: Outdoor switchgear, process lines, and harsh factory environments. Feature: Internal circuit breaker → Business Impact: Streamlined maintenance, faster fault isolation, and reduced downtime during servicing → Application: Regular maintenance windows and panel upgrades. Feature: Compact protection within SPD MAX family → Business Impact: Simplified installation and reduced footprint in crowded panels or retrofit projects → Application: Retrofit projects in space-constrained electrical rooms. Feature: Power Xpert compatibility → Business Impact: Centralized monitoring and coordinated protection across multiple devices → Application: Data centers and large-industrial campuses seeking integrated power protection.
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FAQs
When installing the SPM120480Y4R, plan for a 277/480 V Wye distribution context (4W + G) and ensure mounting within a NEMA 4 rated enclosure. Allow enough space for the 9.5 in depth, 15 in width, and 17.05 in height footprint, and account for its 52 lb weight during handling. Verify panel compatibility with Eaton protection devices and confirm the internal circuit breaker access for maintenance. Using proper torque on mounting hardware and keeping the device within rated environmental conditions helps maintain UL 1449 compliance and long-term reliability.
A 120 kA per phase surge rating means each phase of the installation can absorb substantial transient energy without compromising the device or downstream equipment. In practice, this enhances equipment uptime during lightning events or utility disturbances, reducing insulation stress and potential downtime. For critical loads in data centers and manufacturing lines, this rating supports robust protection without frequent device replacements, contributing to a lower total cost of ownership over the system’s life.
Yes. The SPM120480Y4R is designed specifically for 277/480 V Wye systems and provides four-wire plus ground protection. Its UL 1449 listing and NEMA 4 enclosure ensure reliability in data centers and harsh factory environments. The internal circuit breaker adds serviceability, while its rugged construction supports continuous operation in spaces with dust, moisture, or temperature variations typical of industrial floors.
The SPM120480Y4R carries UL 1449 listing, a key standard for surge protective devices, ensuring tested protection performance and safety. It also uses a NEMA 4 enclosure, offering weather-resistant protection for indoor and outdoor installations. These certifications matter because they provide a verified baseline for reliability, compliance with electrical codes, and peace of mind when deploying protection across mission-critical equipment.
Deploying the SPM120480Y4R can lower downtime by reducing the frequency and severity of surge-related equipment failures. The internal circuit breaker simplifies module servicing and improves fault isolation, shortening maintenance windows. Over time, this translates to reduced repair costs, fewer unplanned outages, and a more predictable maintenance budget, especially in data centers and high-demand manufacturing environments.