Eaton SPM300240S4T Surge Protection Device - UL 1449
Part Number: SPM300240S4T
Quick Summary
Eaton SPD MAX SPM300240S4T surge protection device protects critical electrical systems in industrial environments, preventing transient overvoltages from damaging downstream equipment. When transient events occur, downtime, equipment damage, and maintenance costs rise—this unit mitigates risk by clamping surges to safe levels and signaling faults. It is UL 1449-listed and housed in a rugged NEMA 4 enclosure with an internal terminal block, ensuring reliable performance in harsh environments. Designed for 120/240V split-phase power and compatible with Power Xpert SPD architectures, the unit supports straightforward installation, scalable protection, and long-term cost savings for data centers, panels, and automated machinery.
Product Information
Extended Description
SPM300240S4T Eaton: Eaton SPD Max series surge protection device, SPD Max Series, 300 kA per phase, 120/240 Split Phase, Power Xpert SPD, NEMA 4 with internal terminal block
Product Name
Eaton SPD MAX series surge protection device
Catalog Number
SPM300240S4T
UPC
786689410346
Product Length/Depth
9.5 in
Product Height
17.05 in
Product Width
15 in
Product Weight
52 lb
Certifications
UL 1449
Voltage rating
120/240V split single-phase
Surge current
300kA per phase
The device delivers 300 kA per phase surge capability, providing aggressive transient protection for feeders and main distribution panels. This level of protection minimizes voltage overshoot and downstream component stress, translating into reduced downtime, lower repair costs, and extended equipment life in demanding environments such as manufacturing lines, automated assembly systems, and critical power feeds. By clamping surges quickly and cleanly, it helps protect embedded controls, sensors, and drive systems from lightning strikes and switching transients. This reliability translates into lower maintenance needs and safer, more stable production lines. Designed for 120/240V split-phase operation, the SPM300240S4T integrates with standard North American electrical architectures. Its compact footprint—9.5 in depth, 15 in width, and 17.05 in height—along with a 52 lb rugged construction, supports straightforward mounting in existing panels, MCCs, or outdoor enclosures when paired with NEMA 4-rated housings. The internal terminal block simplifies wiring, reduces field termination errors, and speeds service when components need replacement or upgrades. Installation crews appreciate predictable performance and minimized wiring complexity that keeps project timelines on track. UL 1449-listed protection paired with a NEMA 4 enclosure delivers reliability in harsh environments, including wet, dusty, or vibration-prone locations. The rugged enclosure protects against weather exposure and contaminants, while the internal terminal block provides secure, corrosion-resistant connections that withstand routine maintenance and frequent hot-swaps. This combination supports compliance with industry safety standards while offering confidence to facilities managers responsible for mission-critical power distribution. From a lifecycle perspective, the SPD MAX series aligns with Power Xpert SPD architectures, enabling scalable, facility-wide protection as electrical loads grow. Operators gain predictable protection budgets, fewer outages, and improved regulatory compliance for critical applications such as data centers, manufacturing floors, and process automation. In short, the SPM300240S4T delivers robust protection and installation flexibility to help engineers meet uptime targets while controlling total cost of ownership.
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FAQs
The SPM300240S4T is designed for 120/240V split-phase power distributions typical of North American facilities. It fits standard electrical panels and MCCs and, with its NEMA 4 enclosure, can be used in indoor and outdoor locations. The internal terminal block simplifies wiring and reduces on-site termination errors, speeding up installation and future servicing.
A 300 kA per phase rating provides robust protection against large transient currents from lightning or switching events. This reduces the likelihood of downstream component damage, minimizes downtime, and extends the life of sensitive devices such as PLCs, VFDs, and control relays in demanding industrial environments.
Yes, the SPM300240S4T is UL 1449 listed. It is housed in a rugged NEMA 4 enclosure with an internal terminal block, offering weather resistance and secure wiring for harsh or outdoor installations while maintaining safety and compliance.
Key considerations include 120/240V split-phase compatibility, a footprint of 9.5 in depth by 15 in width and 17.05 in height, and a 52 lb weight. Its internal terminal block reduces wiring complexity, while the enclosure supports mounting in standard panels or outdoor-rated housing, enabling flexible placement in panels, MCCs, or rugged outdoor sites.
The SPD provides measurable ROI through reduced downtime, lower repair costs, and longer equipment life by absorbing surge energy before it reaches valuable assets. Its compatibility with Power Xpert SPD architectures allows scalable, facility-wide protection as loads grow, delivering predictable maintenance budgets and improved uptime for data centers, manufacturing lines, and automated systems.