Eaton SPM300480D4T Surge Protection Device - UL 1449
Part Number: SPM300480D4T
Quick Summary
The Eaton SPM300480D4T surge protection device protects 480V delta systems from transient spikes in industrial panels. In practice, surges can cause unplanned downtime, equipment wear, and costly repairs if protection isn’t reliable. This model is UL 1449 listed and features a rugged NEMA 4 enclosure with an integrated terminal block, supporting safe, field-friendly installation. By design, it integrates with Power Xpert SPD ecosystems and is compatible with 480 Delta (3W+G) configurations, offering a robust path to uptime and regulatory compliance. For engineers and procurement teams, this combination delivers dependable surge protection with straightforward wiring, scalable for panel boards and cabinet layouts.
Product Information
Extended Description
SPM300480D4T Eaton: Eaton SPD Max series surge protection device, SPD Max Series, 300 kA per phase, 480 Delta (3W + G), Power Xpert SPD, NEMA 4 with internal terminal block
Product Name
Eaton SPD MAX series surge protection device
Catalog Number
SPM300480D4T
UPC
786689410384
Product Length/Depth
9.5 in
Product Height
17.05 in
Product Width
15 in
Product Weight
52 lb
Certifications
UL 1449
Voltage rating
480 Delta (3W+G)
Surge current
300kA per phase
High surge capacity with 300 kA per phase in a 480 Delta (3W+G) configuration delivers robust upstream protection for critical loads like PLCs, servo drives, motor starters, and other sensitive control devices in modern production lines, automation cabinets, and robotics interfaces. This level of transient handling reduces the probability of downstream faults, minimizes downtime, and lowers maintenance costs by limiting insulation wear, nuisance trips, and arc-related damage during abnormal utility events. UL 1449 listing paired with a NEMA 4 rated enclosure means this SPD MAX series device is suitable for indoor panels and environments exposed to dust, moisture, or washdown. An internal terminal block simplifies wiring, reduces installation time, and enables safer, field-friendly terminations even in crowded panel spaces for high-density installations. Engineered for panel integration, the SPM300480D4T presents a practical footprint with dimensions of 9.5 inches depth, 15 inches width, and 17.05 inches height, weighing 52 pounds for a sturdy, mountable protection solution suitable for wall-mount and cabinet applications. The enclosure provides space for heavier conductors and routing requirements, helping maintain clean wiring runs, minimize radiant heat near critical devices, and simplify future upgrades. Compatibility with Eaton's Power Xpert SPD ecosystem enables centralized monitoring, coordinated protection across devices, and quicker fault isolation to shorten repair cycles in multi-panel facilities. This integration supports consistent protection rules across panels, simplifies diagnostics, and improves lifecycle management for fleets of protection devices while enabling proactive maintenance. From a total-cost-of-ownership perspective, deploying a single high-capacity SPD reduces spare parts, maintenance visits, and downtime when motors, drives, and control panels experience transient events across shifts. In practice, this translates to higher uptime, longer asset life, and a clearer path to regulatory compliance in manufacturing, automotive, and packaging environments with predictable ROI.
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FAQs
Begin with the panel's available space for a 9.5 in depth unit; connect conductors to the internal terminal block per the Eaton installation guide; ground to the 3W+G configuration; secure the unit to the panel backplane and verify clear routing to prevent overheating. Refer to the specification sheet for torque values and wiring diagrams.
The device is rated for 300 kA per phase in a 480 Delta (3W+G) configuration, designed to guard critical loads such as PLCs, drives, and motor starters from transient overvoltages in industrial power systems.
Yes. The SPM300480D4T uses a NEMA 4 enclosure, making it appropriate for indoor environments and washdown or dusty areas commonly found in manufacturing facilities, with the protection intact even under exposure to moisture.
The SPM300480D4T is UL 1449 listed, and it features a NEMA 4 enclosure with an internal terminal block. It is designed to integrate with Power Xpert SPD systems for coordinated protection and monitoring.
By providing high-capacity transient protection and centralized monitoring compatibility, the SPM300480D4T reduces unplanned downtime, extends asset life, and lowers maintenance frequency, delivering a measurable return on investment in facilities with frequent motor and drive loads.