Surge Protective Devices

ASCO 400 SERIES Surge Protective Devices

ASCO 400 SERIES Surge Protective Devices are UL listed, Type 1 family of surge protectors designed around the latest thermally protected MOV technology. This platform of products is available in any voltage and phase configuration and offers a wide range of surge levels and optional accessories. The compact design and robust performance make the 400 SERIES products an ideal choice for reliable, high-energy protection.

Best Suited For
  • Banking, Financial and Insurance
  • Broadcast and Entertainment
  • Construction and Engineering
  • Data Center/Colocation/Hosting
  • Education
  • Fire/Alarm/Security
  • Government
  • Healthcare
  • Manufacturing
  • Telecom
10 Year Warranty


Thermally Protected MOV Technology
Surge Current Ratings – meets or exceeds industry performance requirements
UL 1449 4th Edition Type 1 SPD, UL 1283 EMI/RFI filter, IEC and CE compliant


Short Circuit Current Rating of 200kAIC
Surge Impulse Rated and Tested
Series Status Includes – audible alarm, surge counters, form C contacts, and green/red status LEDs; including N-G overvoltage 

Services & Support


Frequently Asked Questions
What is the basis of design for the 400 SERIES family of products?
The 400 SERIES is built using robust, large block, Thermally Protected Metal Oxide Varistor (TPMOV) technology which meets all of the current, more stringent standards of UL1449.
What is the fault current rating of the 400 SERIES devices?
The primary short current rating for this family of products is 200kAIC.
Are 400 SERIES devices available with metal enclosures?
Metal enclosures are optional on Model 440 and 445 and standard on Model 460 and 465.
Does ASCO provide a discrete 10-mode surge protective device?
Yes, the Model 445 and 465 are discrete 10-mode devices with TPMOVs connected Line to Line.


Sales In USA Change Location
ASCO Power Technologies Surge Protective Devices Harry Heinz
12310 Pinecrest Road Reston Virginia 20191 USA
Product areas of focus: Surge Protective Devices
Support Change Location
ASCO Power Technologies Global Corporate Office Customer Care
Email Contact +1 800 800 2726 Fax +1 973 966 5709
160 Park Avenue Florham Park New Jersey 07932 USA
Product areas of focus: Transfer Switches, Paralleling Switch Gear, Surge Protective Devices, Load Banks, Fire Pump Controllers, Power Control and Monitoring