373EX

Power Transformers Overview

The Hammond Manufacturing 373EX is an industrial power transformer from the 300 Series, rated at 311 VA. It features a dual primary winding supporting 50/60 Hz operation and accepts input voltages of 115V or 230V AC. The secondary configuration provides a high voltage output of 650V center-tapped at 345mA, alongside a filament winding. Constructed with wire leads for chassis mounting, this unit measures 127 mm in length, 107.95 mm in width, and 138.17 mm in height.

Power Transformers Feature Summary

• Triple secondary winding architecture providing separate high voltage and filament outputs
• Dual primary winding design enabling compatibility with multiple input voltage standards
• Chassis mount construction utilizing wire leads for secure installation

Power Transformers Applications

• Industrial equipment requiring isolated high voltage supplies
• Audio amplifier circuits necessitating dedicated filament heating
• Electronic test instrumentation power systems

Power Transformers Procurement Notes

Verify that the specific application requires the exact 650V center-tapped high voltage specification and 345mA current rating. Confirm physical clearance matches the 127 x 107.95 x 138.17 mm dimensions. Ensure the wiring harness accommodates the wire lead termination style rather than PCB pins. Cross-reference the 300 Series designation to confirm it meets the intended safety and regulatory standards for the target deployment environment.

Power Transformers Selection Notes

Select this model when a combined high voltage and filament supply is required within a single chassis-mounted unit. The 311 VA rating supports moderate power loads typical of professional audio or test gear. Consider the triple secondary configuration if separate isolation between HV and filament circuits is necessary. The dual primary winding offers flexibility for different regional input voltages without requiring external switching components.

Power Transformers Part Context

This component belongs to the Hammond 300 Series, which represents an upgrade over previous generations with conservative design principles. It serves as a specialized power solution replacing discrete transformer setups. The series focuses on reliability for industrial and professional applications where stable voltage regulation and thermal performance are critical for continuous operation.

Power Transformers Replacement Considerations

Direct substitutes include other Hammond 300 Series transformers with matching electrical ratings. Verify that any alternative maintains the same 650V CT @ 345mA high voltage specification. Ensure the replacement also provides the requisite filament winding characteristics. Physical footprint compatibility must be confirmed before swapping units in existing chassis designs.