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DST-7-28
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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 36VA TH
- Series：DST
- Mfr：Signal Transformer
- Package：Box
- Type：Laminated Core
- Voltage - Primary：115V, 230V
- Voltage - Secondary (Full Load)：Parallel 14V, Series 28V
- Current - Output (Max)：Parallel 2.6A, Series 1.3A
- Primary Winding(s)：Dual
- Secondary Winding(s)：Dual
- Center Tap：No
- Power - Max：36VA
- Mounting Type：Through Hole
- Termination Style：PC Pin
- Size / Dimension：66.70mm L x 55.50mm W
- Height - Seated (Max)：40.40mm
- Voltage - Isolation：2500Vrms
- Weight：1.1 lbs (499 g)
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Overview
The DST-7-28 is a laminated core power transformer from the Split/Tran Class 2 series by Signal Transformer. It features dual primary windings rated for 115 VAC and 230 VAC operation at 50 Hz or 60 Hz. The secondary configuration provides parallel 14V and series 28V outputs with a total power rating of 36 VA. Secondary current ratings are specified as 2.6 A in parallel mode and 1.3 A in series mode. Designed for through-hole mounting, it utilizes solder pin termination and measures approximately 66.68 mm in length, 55.55 mm in width, and 39.70 mm in height.
Feature Summary
- Dual primary winding design supports flexible input voltage selection between 115 VAC and 230 VAC.
- Class 2 safety isolation compliant construction suitable for low-energy applications.
- Laminated core architecture ensures stable magnetic coupling and efficient power transfer.
Applications
- Industrial control panel power supplies
- Medical equipment internal power stages
- Test and measurement instrument power conditioning
Procurement Notes
Verify the specific datasheet revision to confirm insulation class and regulatory approvals such as UL or CE before integration. Confirm that the 36 VA rating aligns with thermal management capabilities in the final enclosure. Ensure through-hole footprint dimensions match the PCB layout constraints precisely.
Selection Notes
Select this component when a 36 VA output is required with dual secondary voltage options. Compare physical dimensions against available board space, noting its larger form factor compared to lower VA models in the DST series. Verify that the operating frequency matches the system's 50 Hz or 60 Hz requirement.
Part Context
This part belongs to the DST series of Split/Tran transformers, which are characterized by split bobbin construction for enhanced isolation. The series offers various power ratings, with the DST-7-28 representing the higher end at 36 VA. It shares mechanical mounting standards with other units in the family but differs significantly in electrical specifications and physical size.
Replacement Considerations
Hammond Manufacturing 162J28 is documented as a similar replacement option with comparable 36 VA rating and dual secondary voltages. Verify dimensional compatibility and terminal alignment before substituting, as mounting hole patterns may differ between manufacturers.
