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DST-3-28
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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 2.4VA 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 170mA, Series 85mA
- Primary Winding(s)：Dual
- Secondary Winding(s)：Dual
- Center Tap：No
- Power - Max：2.4VA
- Mounting Type：Through Hole
- Termination Style：PC Pin
- Size / Dimension：34.90mm L x 28.60mm W
- Height - Seated (Max)：30.80mm
- Voltage - Isolation：2500Vrms
- Weight：0.25 lb (113.4 g)
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Overview
The Signal Transformer DST-3-28 is a laminated core power transformer from the DST series, designed for through-hole mounting. It features dual primary windings rated for 115 VAC and 230 VAC input. The secondary configuration provides parallel 14V and series 28V outputs with a maximum power rating of 2.4 VA. Current ratings are specified as 200 mA in parallel mode and 100 mA in series mode. The unit measures 34.90 mm in length, 28.60 mm in width, and has a maximum installation height of 30.80 mm.
Feature Summary
- Dual primary winding capability supports both 115 VAC and 230 VAC operation
- Split bobbin construction ensures Class 2 isolation safety standards
- Laminated core design facilitates efficient magnetic coupling
Applications
- General purpose AC to DC power supply circuits
- Industrial control panel power distribution
- Consumer electronics requiring isolated low voltage DC
Procurement Notes
Verify the specific datasheet version when ordering, as manufacturing relocation notices have been issued for this product line. Confirm that the required lead time aligns with project schedules, as standard delivery periods may extend beyond typical stock availability. Ensure compatibility with existing PCB footprints regarding pin spacing and board thickness constraints before finalizing procurement.
Selection Notes
Select this component when a compact, low-power transformer is needed for universal input applications. The 2.4 VA rating suits light loads where space is limited. Consider the physical dimensions against available board real estate. Verify that the 2500 Vrms isolation voltage meets system safety requirements. This model is part of the Split/Tran family, offering standardized mounting for easy integration into existing designs.
Part Context
The DST-3-28 belongs to the Split/Tran™ Class 2 Split Bobbin Transformers series by Signal Transformer. This series is characterized by its split bobbin architecture, which enhances electrical isolation between windings. The 'DST' prefix denotes the specific form factor within the broader transformer portfolio, optimized for printed circuit board mounting with high reliability and safety compliance.
Replacement Considerations
Direct substitutes include the Tamura 3FD-312 and Triad Magnetics FS12-200. These alternatives offer similar power ratings and pin configurations but require verification of dimensional fit and electrical parameter alignment before implementation.
