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Manufacturer Part Number:
Eaton SPD Max series surge protection device, SPD Max Series, 120 kA per phase, 240 Delta High Leg (4W + G) on 'B' Phase, Power Xpert SPD, NEMA 4 with internal terminal block



Thermally protected MOVs bring more safety and less weight

Don’t risk potentially unsafe conditions or smoke damage from traditional MOVs. Eaton uses thermally protected MOVs as their surge suppression component, which disconnect automatically when subjected to abnormal conditions.

Meet requirements for the Tap rule

The SPD Max can meet all the requirements for an externally mounted surge protection device with an OCPD, as specified by the Tap rule.

Reduce arc flash risks and maintenance cost

All SPD Max units are factory sealed with fewer user-replaceable parts. This not only eliminated the possibility of arc flash and shock hazards, it also reduces maintenance costs.

Never be without protection

All SPD Max units are equipped with up to two replaceable backup modules so your equipment is never at risk.

Visually access the health of your surge protection

At-a-glance LED status indicator lights for all phase, including neutral-to-ground.



  • General specifications
  • Product Name Eaton SPD MAX series surge protection device
  • Catalog Number SPM120240H4T
  • UPC 786689409456
  • Product Length/Depth 9.5 in
  • Product Height 17.05 in
  • Product Width 15 in
  • Product Weight 52 lb
  • Electrical properties
  • Voltage rating 240V high-leg delta (4W+G) on B phase
  • Surge current 120kA per phase
  • URL