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Surge Arrester

Surge arrester module for plug-on load center panel mounting is simple to install.  Designed to fit Square D type QO Load Centers, NQO or NQOD Panelboards, or Combination Service Entrance Devices (CSED) requiring two adjacent pole spaces.  Installation is completed by connecting the single white wire to the panel's neutral bar.  This one device will protect your entire downstream electrical system although surge protectors are still recommended at sensitive appliances, electronic equipment and computers.  Designed for use on single-phase, three-wire 120/240 Vac, 50/60 Hz electrical services.  UL Listed 75YO secondary surge arrester.   Also meets ANSI/IEEE C62.11-1987 requirements.  Uses metal oxide varistor (MOV) design to arrest voltage surges with a low resistance path line-to-line, or line-to-neutral, or line-to-ground while providing a high resistance path to the 50/60 Hz power source.  The MOV responds faster and has a lower clamping voltage than comparable gapped arresters.  Individual non-replaceable internal fuse links protect each MOV and open in the event of a surge that damages an MOV.  The LED on the face of the unit indicates operational status of the arrester.  If the light is on the unit is fully operational.  When the LED indicator goes off, the unit should be replaced.  Suitable for use in service entrance locations and meets the requirements of NEC Article 280.  Made in USA  


Detailed Specifications

Parameter Value
Secondary Surge Arrester Voltage Rating 175V AC maximum, line to ground
White Wire Length
(cut as short as possible)
18 inches
Lead Lengths for Discharge Voltages 1 inch / 6 inches
Discharge Voltage @ 1,500 amps 500 / 575 V line to neutral
Discharge Voltage @ 5,000 amps 625 / 725 V line to neutral
Discharge Voltage @ 10,000 amps 750 / 1075 V line to neutral
Minimum Life for 1500 amp surges 2,500 operations
Peak Single-Pulse Current Rating 27,000 amps
Transient Energy Rating 330 joules, line to neutral
660 joules, line to line
Operating Temperature Range -20 to 65 C (-4 to 150 F)



Item Number: QO2175SB
Price: $134
Price last updated 1/24/2011
Shipping Weight: 2 lbs.
This item normally ships in approximately 3 days or less.


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