PX3-125 Application Guide

Step 1 : SPD Product Selection Guide

Step 2 : Project-Specific Surge Current Selection Chart

Step 3 : Application Guide

Panelboards

Product Application

Surge Current Capacity: 125 kA/Mode (250 kA/Phase)

Connection Information

Surge Current Rating
(per Mode)
VoltageConfigurationProduct NumberData SheetCircuit
Breaker
Conductor Size
(Phase, Neutral
and Ground)
125 kA480Y/277 V
208Y/120 V
120/240 V
3-Phase, 4-Wire Wye
3-Phase, 4-Wire Wye
Single/Split Phase
PX31254803YMSTM4F6
PX31252083YMSTM4F6
PX31252402GMSTM4F6
PDF100A#2 AWG
Click on the “PDF” nomenclature (above) for the product data sheet.

The product numbers (above) are shown for the identified voltage configurations, with a surface mount and top feed panel extension enclosure, and includes the M4 monitoring system; also the matched color for Square D/Schneider. For other configurations of the PX3-125, see and click on the “Product Number Configuration Guide” and the “Monitoring System Selection Guide” (below).

For sheet note spec, CLICK HERE.

Application Guide for PX3-125 Series SPDs

Panelboard Application

For other PX3 series product information, CLICK HERE.