166K25

Power Transformers Overview

The Hammond Manufacturing 166K25 is an industrial control power transformer designed for chassis mounting. It features a single primary winding rated for 115 VAC at 60 Hz and a single secondary winding providing 25 VAC center-tapped output with a current rating of 1.5 A. The unit has a power capacity of 37.5 VA and utilizes wire leads for termination. Physical dimensions are 93.7 mm in length, 47.8 mm in width, and 58.7 mm in height, weighing approximately 680 g. It operates within a temperature range of 0°C to +130°C and supports frequencies of 50 Hz or 60 Hz.

Power Transformers Feature Summary

• Provides electrical isolation between primary and secondary circuits using a laminated core design.
• Features a low-voltage secondary output suitable for powering filament loads and low-voltage rectifier circuits.
• Constructed with wire lead terminations for direct connection to control panels.
• Designed for open-style chassis installation without an enclosing case.

Power Transformers Applications

• Industrial control panel power distribution
• Filament power supply for vacuum tubes
• Low-voltage rectifier circuit input stages

Power Transformers Procurement Notes

Verify the specific voltage configuration and physical mounting requirements against the target equipment specifications before procurement. Confirm that the wire lead lengths and terminal types are compatible with the existing wiring harness. Ensure the ambient operating environment remains within the specified temperature limits to maintain insulation integrity and performance standards.

Power Transformers Selection Notes

Select this component when a 37.5 VA isolation transformer is required for 115 VAC input systems. The 25 VAC center-tapped secondary is appropriate for applications needing balanced low-voltage DC conversion or dual-polarity AC supplies. Consider the chassis mount style and open construction if enclosure space allows for adequate ventilation and safety clearance.

Power Transformers Part Context

This component belongs to the Hammond 166 series of industrial control transformers. The series offers various power ratings and voltage configurations to suit different control system needs. The 166K25 specifically addresses applications requiring moderate power isolation with a standard 115 VAC primary input.

Power Transformers Replacement Considerations

Direct substitutes include other Hammond 166 series models with identical electrical ratings but different physical dimensions, such as the 166L25 (50 VA). Verify that any replacement maintains the same primary voltage, secondary voltage, current capacity, and mounting style compatibility.