Square D 9070TF300D3 Control Transformer 300 Va

Product Description

The SQUARE D 9070TF300D3 is a single-phase control transformer rated at 300 VA, designed to step voltage down to safe control-circuit levels in industrial and commercial electrical systems. It features a top-mounted fuse block for overcurrent protection on the secondary circuit, keeping fusing accessible without removing the unit from its mounting position. The transformer carries a 176 degrees F temperature rise rating, which governs the maximum allowable heat buildup during continuous operation. Licensed electricians and industrial maintenance technicians install this unit as part of motor control centers, machine control panels, and automation equipment.

This transformer is suited for control-circuit power supply applications in industrial facilities, commercial buildings, and process equipment installations. It delivers stable low-voltage power to contactors, relays, solenoids, and PLCs. The top-mount fuse block configuration makes it a practical choice in panel layouts where secondary-circuit fusing must remain serviceable after installation. It is packaged and sold as a single unit.

Key Features

• 300 VA single-phase control transformer provides reliable secondary power for control circuits
• Top-mounted fuse block keeps secondary-circuit fusing accessible and field-serviceable
• 176 degrees F temperature rise rating defines continuous-duty thermal performance
• Fused configuration provides overcurrent protection on the secondary winding
• Compact footprint supports integration into standard control panel enclosures

Compatibility

Designed as an OEM-style replacement or new-installation control transformer for single-phase industrial control circuits requiring 300 VA capacity with integrated secondary fusing.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NFPA 70 (NEC) requirements for control transformers and panel wiring. De-energize and lock out the supply circuit before mounting, wiring, or servicing this transformer. Verify that primary and secondary voltage ratings match the application before connecting. Inspect the top-mount fuse block and install appropriately rated fuses per the circuit design before restoring power.