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Grey non-metallic surge protection enclosure, 2.81 in deep

Mersen

Mersen STP480D07M Surge Protection Device 480V AC 3 Phase 4 Wire 75 kA

SKU CH-P71Q-BCGGX

Protects three-phase 480 V AC systems with a 75 kA surge rating in a NEMA 1 polyethylene terephthalate enclosure

  • TypePower Quality & Distribution
  • Protects 3-phase 480V AC systems with 75 kA surge capacity
  • Four-wire configuration covers all phase and neutral conductors
  • NEMA 1 rated polyethylene terephthalate enclosure suits indoor installations
  • Compact 2.81 in depth fits tight electrical box spaces
  • Mersen brand delivers proven power quality and distribution performance

Mersen STP480D07M Three-Phase Surge Protector

The Mersen STP480D07M is a surge protection device rated for 480V AC three-phase systems with four-wire configuration. It provides a 75 kA surge current capacity for industrial and commercial electrical panels. The unit uses a non-metallic polyethylene terephthalate enclosure rated NEMA 1 for indoor mounting. It is suited for facilities needing basic transient voltage suppression on 480V distribution equipment.

Installation Notes for Panel Mounting

The device depth measures 2.81 in, so verify the panel cavity has adequate clearance behind the mounting surface. The NEMA 1 enclosure is intended for dry, indoor locations only and must not be exposed to weather or wash-down conditions. Wiring must follow the three-phase, four-wire schematic; miswiring the neutral or ground conductor is the most common error that prevents proper clamping. No special tools are required beyond standard electrical hand tools and appropriate torque wrenches for the terminal lugs.

Pre-Order Compatibility Checks

Confirm the service voltage is 480V AC three-phase with a four-wire arrangement before ordering. The 75 kA rating should match the facility's surge protection coordination study if one exists. Check that the panel has sufficient physical space for the 2.81 in depth and that the mounting surface can accept the enclosure footprint. Ensure the installation environment meets the NEMA 1 indoor-only requirement and that local codes permit this device type.

Highlights

  • Protects 3-phase 480V AC systems with 75 kA surge capacity
  • Four-wire configuration covers all phase and neutral conductors
  • NEMA 1 rated polyethylene terephthalate enclosure suits indoor installations
  • Compact 2.81 in depth fits tight electrical box spaces
  • Mersen brand delivers proven power quality and distribution performance

Specifications

BrandMERSEN
TypePower Quality & Distribution

Questions about this item

How do I verify the STP480D07M is working after wiring it to a 480V AC three-phase panel?

Check that the status indicator shows normal operation and confirm no fault codes appear after energising the circuit.

What components come with the STP480D07M and what must I supply myself?

The device includes the surge protection unit in a NEMA 1 polyethylene terephthalate enclosure; mounting hardware and conduit fittings are not included.

Which STP480D07M rating should I select for a 480V three-phase service?

Choose the 75 kA model listed as 480V AC, three-phase, four-wire to match the service voltage and phase configuration.

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