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Grey non-metallic surge protection box, 2.81 in deep

Mersen

Mersen STP480Y07 Surge Protection Device 480V AC 3 Phase 4 Wires 75 kA

SKU CH-F0P1-VE35X

Three-phase 480 V AC surge protector with 75 kA capacity and NEMA 1 polyethylene enclosure

  • Product typePower Quality & Distribution
  • Protects 480 V three-phase systems with 75 kA surge capacity
  • Four-wire configuration covers all phases plus neutral for complete coverage
  • NEMA 1 rated polyethylene terephthalate enclosure suits indoor installations
  • Compact 2.81 in depth fits tight panel spaces
  • Meets Proposition 65 disclosure requirements for California compliance

Mersen STP480Y07 Surge Protection Device

The Mersen STP480Y07 is a surge protection device rated for 480V AC three-phase power with four wires. It is designed for electrical distribution systems requiring protection against transient voltage spikes. This unit suits industrial or commercial installations where three-phase power quality must be maintained. It is not for buyers who need single-phase protection or a lower voltage rating.

Sustained load behaviour

The device provides a surge current capacity of 75 kA to handle high-energy transients. Its nonmetallic polyethylene terephthalate enclosure carries a NEMA 1 rating for indoor use. Under continuous operation the enclosure material resists degradation while clamping repeated surge events. It is not for applications that demand a higher NEMA rating or metallic housing.

Installation and common issues

The compact depth of 2.81 in allows mounting in standard electrical boxes. California Proposition 65 warnings indicate the product contains chemicals known to cause cancer and reproductive harm. Installers must follow local codes and use appropriate personal protective equipment during handling. It is not for installers who cannot comply with Proposition 65 labelling requirements.

How it compares

Measured against everything we stock in Electrical Enclosures & Cabinets, at today’s prices. Recalculated every night.

Price $342.99
Pricier than about 90% of the 1,411 comparable items (median $39.99).

Specifications

Product
Brand nameMERSEN
Product typePower Quality & Distribution

Questions about this item

How much heat does the STP480Y07 generate when it runs continuously?

The unit is a passive surge protector with no active cooling, so it adds negligible heat to the enclosure during normal operation.

What existing electrical infrastructure is required to install this 480 V, 3-phase, 4-wire device?

You need a 480 V AC three-phase supply with four conductors and a compatible disconnect or panel rated for the available fault current.

Will the 75 kA rating coordinate with older panelboards still in service?

The 75 kA surge rating works with legacy panels as long as the panel’s short-circuit current rating meets or exceeds the available fault current at the installation point.

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