Welcome to the ASCO Website

Welcome to our website.

You can choose another country to view available products or go to our Global website for company information.


ASCO Model 109 (LV-DIN-Rail) Surge Protective Device

12-60VDC | 15kA

The ASCO Model 109 is intended for use on a wide range of low voltage applications inside appropriate enclosures, including high speed communication circuits. Terminals are fingersafe. It includes three stage high-energy surge suppression in a Pi (π) configuration: • 1st Stage: Parallel-connected Gas Discharge Tubes • 2nd Stage: Series-connected impedance • 3rd Stage: Parallel-connected Transorbs

ASCO Model 109 (LV-DIN-Rail) Surge Protective Device
  • Features

    • Each SPD Protects Two (2)Pairs of Wire
    • Circuit schematic printed onside of SPD
    • Ground Wire Lug


    • UL Listed
    • 5 Year Warranty


    • Banking, Financial and Insurance
    • Construction and Engineering
    • Data Center/Colocation/Hosting
    • Education
    • Fire/Alarm/Security
    • Government
    • Healthcare
    • Manufacturing
    • Military, Defense, Aerospace and Missile
    • Telecom
    • Transportation
    • Water Supply/Sewage Disposal