DST-7-20

Overview

The DST-7-20 is a Class 2 printed circuit mount power transformer from the Split/Tran series by Signal Transformer. It features dual primary windings rated for 115 VAC and 230 VAC input, providing versatile connectivity for global power standards. The secondary configuration offers a center-tapped output of 20 VAC at 1.8 A or 10 VAC at 3.6 A, delivering a total power rating of 36 VA. Designed for through-hole installation, it utilizes a laminated core structure with solder pin termination. The unit measures 66.7 mm in length, 55.5 mm in width, and 40.4 mm in height, ensuring compatibility with standard PCB layouts requiring robust power conversion capabilities.

Feature Summary

• Dual primary winding design supports both 115 VAC and 230 VAC input voltages for international adaptability.
• Center-tapped secondary winding provides flexible voltage options including 20 VAC and 10 VAC configurations.
• Through-hole mounting style with solder pin termination ensures secure mechanical attachment to printed circuit boards.

Applications

• General purpose AC to DC power supply units
• Industrial control systems requiring isolated power stages
• Audio equipment power distribution

Procurement Notes

Verify that the specific order matches the DST-7-20 part number to ensure correct voltage ratings and physical dimensions. Confirm compliance with relevant safety certifications such as UL or CSA if required for the target market. Check datasheet specifications for insulation class and operating temperature range to ensure suitability for the intended environmental conditions before finalizing procurement.

Selection Notes

Select this component when a 36 VA power rating is required with dual primary voltage support. The center-tapped secondary output is suitable for full-wave rectification circuits. Ensure the PCB footprint accommodates the specified length and width dimensions. Consider thermal management requirements based on the 36 VA load capacity and ambient operating temperatures defined in the official documentation.

Part Context

This component belongs to the DST series of split-core transformers manufactured by Signal Transformer. These units are characterized by their laminated core construction and through-hole mounting capability. The series provides various power ratings and voltage configurations to meet diverse electronic design needs while maintaining compact form factors suitable for panel and board mounting applications.

Replacement Considerations

Direct substitutes within the same series include the DST-7-16, which shares identical physical dimensions and primary voltage ratings but differs in secondary output specifications (16 VCT/8 V). Verify electrical compatibility carefully before substitution to ensure the alternative meets the circuit's voltage and current requirements.

FAQ

What are the primary voltage ratings for the DST-7-20?

The transformer features dual primary windings rated for 115 VAC and 230 VAC operation.

Does the DST-7-20 have a center-tapped secondary?

Yes, the secondary winding is center-tapped, providing outputs of 20 VAC at 1.8 A or 10 VAC at 3.6 A.