Power Transfer Switches

ASCO 4000 SERIES Power Transfer Switches

Transfer loads between alternate sources of power regardless of ampacity size efficiently with ASCO 4000 SERIES Power Transfer Switches made possible with reliable, field proven solenoid operating mechanisms. Combined with programmable microprocessor controllers, they offer the most advanced method of transferring loads.

Best Suited For
  • Banking, Financial and Insurance
  • Broadcast and Entertainment
Limited Guardian Warranty


*To see model-specific downloads, you will need to go to the model-specific product page by selecting the model name in the specifications chart above.


Conventional two-position transfer configuration, plus closed and delayed transition modes of operation. All configurations available with either automatic or non-automatic control.
UL listed to 1008 Transfer Switch Equipment & CSA certified to CSA 22.2 No.178-1978 Automatic Transfer Switches.
Qualified to IEC 60947-6-1, CE marked (optional). (Limited to certain accessories.)
Rated up to 600 VAC, 30 through 4000 amperes.


Reliable and field proven solenoid operating mechanism.
High withstand and close-on ratings including short time withstand current rating for optimum flexibility in circuit breaker coordination (800-4000 amperes).
Solid, switched neutral configurations available.


Sales In USA Change Location
Justin Mitros
Email Contact +1 571 313 8041 Fax +1 703 342 0391
12310 Pinecrest Road, Suite 204 Reston Virginia 20191 USA
Product areas of focus: Transfer Switches, Paralleling Switch Gear, Power Control and Monitoring
ASCO Power Technologies Load Banks Anthony Vaccariello
6255 Halle Drive Cleveland Ohio 44125 USA
Product areas of focus: Load Banks
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 Services Support
Product areas of focus: