DST-3-120

Overview

The DST-3-120 is a laminated core power transformer manufactured by Signal Transformer, designed for through-hole mounting. It features a dual primary winding configuration supporting 115 VAC and 230 VAC inputs in parallel operation. The secondary output provides a center-tapped 120 VAC rating with a current capacity of 20 mA, or a non-center-tapped 60 VAC rating at 40 mA. The unit has a power rating of 2.4 VA and utilizes quick connect terminals for electrical interfacing.

Feature Summary

• Dual cavity split bobbin construction for enhanced isolation
• Supports both 115V and 230V primary voltage configurations
• Center-tapped secondary output capability

Applications

• Industrial control panel power supplies
• Chassis-mounted electronic equipment
• Class 2 low voltage power circuits

Procurement Notes

Verify the specific manufacturer designation, as the part number appears across different product lines including Bel Signal Transformer and Signal Transformer. Confirm that the terminal type matches the quick connect specification rather than PC pin or screw mount variants. Ensure the datasheet confirms the 2.4 VA rating and 120 VCT secondary configuration to avoid confusion with similar model numbers.

Selection Notes

Select this component when a 2.4 VA laminated transformer with a 120 VCT secondary is required for chassis installation. It is suitable for applications needing isolated power from standard mains voltages. Consider the physical dimensions and quick connect interface compatibility during PCB or chassis design integration.

Part Context

This transformer belongs to the ST/DST series platform characterized by dual cavity designs. It serves as a general-purpose power conversion component for industrial and commercial electronics requiring reliable isolation between primary and secondary circuits.

Replacement Considerations

Public confirmed substitute part numbers include DST-3-16 and FS16-150.