Description
The Schneider Electric (Square D) 1S1F is a 1 kVA control transformer engineered to deliver dependable, precise voltage conversion in HVAC systems, commercial building automation, and industrial control panel applications. Backed by the trusted Square D heritage and Schneider Electric’s global engineering expertise, this transformer provides the stable secondary voltage your control circuits demand.
Key Specifications
- SKU: 1S1F
- Primary Voltage: 240/480V
- Secondary Voltage: 120/240V
- kVA Rating: 1 kVA
- Brand: Schneider Electric / Square D
Product Highlights
- Dual primary voltage (240/480V) for flexible installation across single- and three-phase panel configurations
- Dual secondary voltage (120/240V) to power a wide range of control circuits and loads
- 1 kVA capacity suitable for HVAC control panels, motor starters, and building automation systems
- Square D quality construction for long service life and consistent performance
- Compact design for easy integration into electrical enclosures and control panels
Typical Applications
- HVAC control panels and building automation systems
- Motor starter and contactor control circuits
- Industrial control panels requiring step-down voltage conversion
- Commercial electrical distribution and equipment protection
Trust Schneider Electric’s Square D line for proven reliability in demanding HVAC and industrial environments. The 1S1F transformer is an ideal solution wherever dependable voltage step-down and isolation are required.







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