Since 1925, the Automatic Transfer Switch has been the cornerstone of ASCO's commitment to reliability and expertise. ASCO has pioneered advancements in Power Source Switching and Controls, ensuring progress is never compromised.
- 1st
Automatic Transfer Switch in the industry
- 2M+
Install Base
- 117
US Patents
- 30+
Compliance Codes and Standards
- 1200+
Dedicated professionals
- 60+
Countries Global Presence
Reliable Solutions for Every Segment
Discover a Century of Innovation
-
1925
First Automatic Transfer Switch(ATS)
-
1938
First ATS with Mechanically held contacts
-
1940
First facility to install ATS
-
1967
First Power Control System
-
1980
First Bypass Isolation Transfer Switch
-
1985
First Switchgear user interface
-
2011
First Bypass Isolation Transfer Switch
-
2024
ASCO SourcePact Interconnect Source Isolation Switch

A Comprehensive Portfolio
Discover ASCO Power Technologies' innovative product portfolio, featuring Automatic Transfer Switches and advanced Power Source Switching & Control solutions.
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