Eaton SPD120208Y3O Surge Protection Device - UL 1449
Part Number: SPD120208Y3O
Quick Summary
SPD120208Y3O is a surge protection device for 120/208V systems used in commercial and light industrial panels. Engineers often struggle with nuisance surges that damage controllers, PLCs, and drives, leading to unexpected downtime and costly repairs. This unit is UL 1449 listed and housed in a rugged NEMA 4X enclosure, with external sidemount installation for easy retrofit in existing electrical rooms. The package includes a standard feature set with a surge counter to track events and a 120 kAIC interrupt capability for fast response. By combining robust protection with clear diagnostics, it supports proactive maintenance and helps protect critical assets while meeting industry standards and improving uptime across facilities.
Product Information
Extended Description
SPD120208Y3O Eaton: Surge Protection Device, SPD series, 120 kAIC, 120/208V wye (4W+G), Standard feature package and surge counter, NEMA 4 with internal disconnect enclosure, External side mount, 150 L-N, 150 L-G, 150 N-G, 300 L-L operating voltage
Product Name
Eaton SPD series surge protection device
Catalog Number
SPD120208Y3O
UPC
786685337647
Product Length/Depth
9.5 in
Product Height
3.45 in
Product Width
5.4 in
Product Weight
3.5 lb
Warranty
15 year
Certifications
UL 1449
Type
Surge protection device
Accessories
Standard feature package and surge counter
Voltage rating
120/208V wye (4W+G)
Enclosure
NEMA 4X
Mounting Method
External side
Interrupt rating
120 kAIC
Operating voltage
150 L-N, 150 L-G, 150 N-G, 300 L-L
Series
SPD
Eaton’s SPD Series (Sidemount Versions) Brochure
Eaton SPD Series - For Mounting External To Electrical Distribution Equipment Installation Manual
Eaton Specification Sheet - SPD120208Y3O
Eaton’s SPD Series (Sidemount Versions) Data Sheet
With a 120 kAIC interrupt rating and a 120/208V wye (4W+G) configuration, SPD120208Y3O delivers fast, high-energy surge clamping that minimizes the risk of equipment damage and unplanned downtime in motor drives and control panels. In practical terms, that means fewer outages, longer service life for upstream components, and lower maintenance costs. It is ideally suited for commercial buildings, manufacturing lines, and distributed power centers where transient events are common. Protected by a NEMA 4X enclosure and designed for external side mounting, this SPD withstands moisture, dust, and harsh environments. The rugged housing reduces field failures and enables quick retrofits to existing electrical distributions without dismantling cabinets. This compatibility lowers total installation time and minimizes project risk for upgrades in retrofit projects and new builds. A built-in surge counter provides ongoing visibility into event history, enabling proactive maintenance and smarter asset management. The device also supports L-N, L-G, N-G and L-L surge paths, ensuring comprehensive protection for critical loads across panels, feeders, and sub-distribution. Operating voltage is 120/208V wye (4W+G), suitable for typical panel buses in commercial buildings and light industrial plants. The installer-friendly external mounting and standardized form factor streamline coordination with upstream protection devices and distribution equipment. The performance envelope, including a 150 L-N/L-G/N-G and 300 L-L operating range, supports diverse configurations. With a 15-year warranty and UL 1449 listing, the SPD aligns with robust safety and reliability expectations. The external sidemount design reduces service interruptions during replacement or expansion, and the compact footprint supports space-constrained installations in equipment rooms, closets, or outdoor cabinets. Engineers appreciate the product’s documented compatibility with SPD series lineups and the standard feature package. This translates to predictable procurement, easier stocking, and consistent performance across facilities. Use this device to meet NEC/UL requirements while delivering measurable ROI through equipment protection and downtime reduction.
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FAQs
Begin by confirming the panel accepts a sidemount surge protector in a NEMA 4X enclosure. Follow the wiring diagram to connect L-N, L-G, and N-G paths, ensuring proper grounding. Use the surge counter to monitor events and schedule preventative maintenance. The sidemount design minimizes cabinet disassembly and reduces downtime during retrofit or expansion projects.
SPD120208Y3O operates at 120/208V wye (4W+G) with a 120 kAIC interrupt rating. It supports multiple surge paths: L-N, L-G, N-G, and L-L, with operating voltages including 150 V levels for L-N, L-G, and N-G, and 300 V for L-L. The enclosure is rated NEMA 4X and the unit is UL 1449 listed, ensuring compliance and reliability.
Yes. The device features a rugged NEMA 4X enclosure designed for outdoor and harsh indoor environments. External side mounting further supports installations in constrained spaces and outdoor cabinets, providing durable protection against moisture, dust, and weather while enabling straightforward retrofits without extensive cabinet modification.
SPD120208Y3O is UL 1449 listed, which verifies compliance with safety and performance standards for surge protection devices. This certification helps meet NEC/UL requirements and simplifies approvals for commercial, industrial, and data-center installations. The NEMA 4X enclosure further supports project-specific environmental and protection codes.
Installing SPD120208Y3O reduces downtime and unforeseen repair costs by shielding critical equipment from transient surges. Its 15-year warranty and durable enclosure lower maintenance expenses, improve asset life, and streamline procurement with a standard feature package that supports predictable stocking and consistent performance across facilities.