DST-4-20

Overview

The Signal Transformer DST-4-20 is a Class 2 laminated power transformer designed for board mount applications. It features dual primary windings rated for 115 VAC and 230 VAC input, providing versatile connectivity for global power standards. The secondary configuration delivers 20 VCT at 8 V with a total power rating of 6 VA. Current capabilities are specified as 400 mA for the center-tapped output and 800 mA for the full secondary winding. This component utilizes through-hole termination and measures 41.3 mm in length, 33.3 mm in width, and 33.3 mm in height.

Feature Summary

• Dual primary winding design supports both 115 VAC and 230 VAC operation
• Split bobbin construction provides enhanced electrical isolation between windings
• Class 2 transformer classification ensures compliance with safety regulations
• Laminated core structure optimizes magnetic efficiency for power conversion

Applications

• Low voltage power supply circuits requiring isolated AC inputs
• Control panels utilizing Class 2 compliant power sources
• Electronic devices operating on standard 115 VAC or 230 VAC mains
• Industrial equipment needing reliable step-down voltage transformation

Procurement Notes

Verify that the specific part number matches the required secondary voltage configuration of 20 VCT. Confirm that the physical dimensions fit the target PCB layout, as the through-hole pin spacing is fixed. Ensure the application environment does not exceed the thermal limits defined in the official datasheet. Cross-reference the manufacturer's latest documentation to confirm current RoHS compliance status before finalizing procurement orders.

Selection Notes

Select this model when a 6 VA power rating is sufficient for the load requirements. Choose the DST-4-20 over other series members specifically for its 20 VCT secondary output. Consider the physical size constraints relative to the 41.3 mm length dimension. Evaluate the need for dual primary flexibility if the device will operate in regions with varying mains voltages.

Part Context

This component belongs to the Split/Tran™ Class 2 Split Bobbin Transformers series by Signal Transformer. The series is characterized by split bobbin designs that maximize isolation performance. These transformers are engineered for general-purpose power applications where safety isolation is critical. The product line offers various power ratings and voltage configurations to suit diverse electronic design needs.

Replacement Considerations

Direct substitutes within the same series include models with identical power ratings but different secondary voltages, such as DST-4-10 or DST-4-16. Verify that any replacement maintains the 6 VA rating and compatible physical footprint. Ensure the new part supports the required 115 VAC/230 VAC dual primary input specifications.