162F28

Overview

The Hammond Manufacturing 162F28 is a low voltage PCB mount power transformer with a 6 VA rating. It features dual primary windings for 115 VAC and 230 VAC operation at 50/60 Hz. The secondary configuration provides 28 VAC center-tapped at 0.2 A in series or 14 VAC at 0.4 A in parallel. Designed for through-hole mounting, it utilizes a split bobbin construction to minimize inter-winding capacitance. The unit measures 1.63 inches in length, 1.31 inches in width, and 1.31 inches in height.

Feature Summary

• Low profile design with split bobbin construction
• Dual primary windings for versatile input voltage
• Non-concentrically wound dual secondary windings
• Through-hole PCB mounting style

Applications

• Low voltage electronic equipment requiring isolation
• Industrial control panels utilizing PCB integration
• Consumer electronics with specific voltage step-down needs
• General purpose power supply circuits

Procurement Notes

Verify the specific secondary current requirement against the datasheet, as the 162F28 supports different configurations based on series or parallel winding connections. Confirm that the physical dimensions fit the intended PCB layout, particularly noting the through-hole pin spacing. Ensure the operating frequency matches the 50/60 Hz specification. Cross-reference the manufacturer part number to avoid confusion with similar models in the 162 series that may have different voltage ratings or core types.

Selection Notes

Select this component when a compact, low-profile transformer is required for direct PCB mounting. It is suitable for applications needing electrical isolation between primary and secondary circuits. Consider the 6 VA power limit when designing the load circuit. The dual primary option allows flexibility for global deployment without changing hardware. Evaluate the thermal performance requirements, as the small form factor may limit heat dissipation compared to larger chassis-mounted alternatives.

Part Context

This transformer belongs to the Hammond 162 series of low voltage PCB mount units. These components are designed for space-constrained environments where traditional chassis transformers cannot fit. The series typically offers various voltage combinations and power ratings to support diverse electronic designs. The 162F28 specifically addresses needs for moderate power isolation in a standardized footprint compatible with common manufacturing processes.

Replacement Considerations

The 162F20 is a direct substitute within the same series, offering identical physical dimensions and mounting style but with a 20 VAC center-tapped secondary instead of 28 VAC. Verify that the lower secondary voltage meets the circuit requirements before swapping. Other Hammond models in the 162 series may share the footprint but differ significantly in power rating or voltage configuration, requiring careful electrical validation.