164D20

Overview

The Hammond Manufacturing 164D20 is a low-voltage PCB mount power transformer designed for through-hole installation. It features a single primary winding rated at 115 VAC and a dual secondary winding configuration providing 20 VAC center-tapped output. The unit has a power rating of 1.1 VA, with a secondary current rating of 55 mA. Physical dimensions are 1.38 inches in length, 1.13 inches in width, and 1.31 inches in height. The transformer operates on 50/60 Hz current and utilizes solder pin termination.

Feature Summary

• Low profile design optimized for PCB mounting applications
• Dual secondary winding capability allows series or parallel connection configurations
• Laminated core construction for standard power transformation

Applications

• Low voltage AC power supply circuits
• Industrial control panel instrumentation
• Electronic equipment requiring isolated AC sources

Procurement Notes

Verify the specific secondary current requirement against the datasheet specification of 55 mA to ensure compatibility with load demands. Confirm that the 115 VAC primary voltage aligns with the available line voltage in the target application environment. Ensure the through-hole footprint matches the printed circuit board layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a compact, low-power transformer is required for 115 VAC input systems. The 1.1 VA rating suits light loads, while the center-tapped secondary offers flexibility for rectification or split-rail needs. Consider the physical height constraint of 1.31 inches during mechanical design integration to ensure adequate clearance within the enclosure.

Part Context

This part belongs to the Hammond 164 series of low-voltage PCB mount transformers. The series provides various voltage and VA options ranging from 1.1 to 36 VA. The 164D20 specifically addresses the need for a 20V center-tapped output in a small form factor, serving as a standardized solution for general-purpose low-power AC distribution in electronic assemblies.

Replacement Considerations

Cross-reference with other Hammond 164 series variants such as 164D24 or 164E56 if different voltage outputs are required. Verify that substitute parts maintain the same 115 VAC primary rating and through-hole mounting style to ensure mechanical and electrical compatibility without redesigning the PCB footprint.