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The SQUARE D 9070TF500D20 is a single-phase control transformer rated at 500 VA, designed to step down line voltage to a safe control-circuit voltage for industrial and commercial electrical systems. It features a top-mount fuse block with fused protection, which allows quick fuse access without removing the unit from its mounting position. Rated for a 239 degrees F temperature rise, this transformer is built for continuous duty in demanding panel environments. Licensed electricians and industrial controls technicians typically specify and install this unit in motor control centers, machine control panels, and automated equipment enclosures.
This transformer is suited for industrial control panel applications where a reliable, fused step-down transformer is required to power relay logic, PLC I/O circuits, solenoid valves, and other low-voltage control devices. Its top-mount fuse block design makes it a practical choice in tight enclosures where side or bottom fuse access is restricted. The unit ships individually and is commonly specified as a direct OEM-style replacement or new-installation component in single-phase control circuits.
Designed as an OEM-style replacement or new-installation control transformer for single-phase industrial and commercial control panel applications requiring a 500 VA fused step-down transformer.
Installation should be performed by a licensed electrician in accordance with NFPA 70 (NEC) requirements for control transformers and panel wiring. De-energize and lock out the panel before mounting or wiring the transformer. Verify that primary and secondary voltage ratings match the application requirements before energizing. Inspect and replace fuses in the top-mount fuse block only after the circuit has been fully de-energized.
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