161D40

Overview

The Hammond Manufacturing 161D40 is a low voltage power transformer designed for printed circuit board (PCB) mounting. It features a single primary winding rated at 115 VAC and a dual secondary winding configuration providing 40 VAC center-tapped output. The unit has a power rating of 1 VA with a secondary current capacity of 20 mA. It utilizes through-hole solder pin termination for secure board attachment. The transformer operates at a frequency of 60 Hz and is housed in an epoxy cast construction to ensure durability and environmental protection during operation.

Feature Summary

• Epoxy cast construction provides mechanical stability and environmental protection
• Single primary winding supports standard 115 VAC input applications
• Dual secondary winding enables center-tapped voltage distribution
• Through-hole solder pin termination ensures reliable PCB integration

Applications

• Low voltage AC power supply circuits
• Control panel power distribution
• Electronic equipment requiring isolated secondary voltages
• Industrial control systems with limited current demands

Procurement Notes

Verify the specific part number suffix against official Hammond Manufacturing documentation to confirm electrical ratings and physical dimensions. Ensure that the procurement source provides valid manufacturer traceability. Cross-reference the datasheet specifications regarding insulation class and thermal performance before finalizing purchase orders to guarantee compatibility with the intended operational environment.

Selection Notes

Select this component when a compact, low-power transformer is required for direct PCB integration. The 1 VA rating suits applications with minimal current draw. Verify that the 115 VAC primary voltage aligns with the available line voltage. Confirm that the 40 VAC CT secondary output meets the downstream circuit requirements. Consider the through-hole mounting style if surface-mount alternatives are not suitable for the assembly process.

Part Context

The 161D40 belongs to the Hammond Manufacturing 161 series of low voltage power transformers. This series is characterized by epoxy encapsulation and PCB mount designs. These units are engineered for general-purpose isolation and voltage transformation in compact electronic assemblies. The series offers various power ratings and voltage configurations to accommodate diverse low-power application needs within industrial and commercial electronics.

Replacement Considerations

Consult official Hammond Manufacturing substitution guides for verified equivalent part numbers. Do not assume cross-compatibility with other manufacturers without verifying electrical parameters and physical footprint dimensions. Ensure any substitute component matches the 115 VAC primary and 40 VAC CT secondary specifications exactly.