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DST-3-20
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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 10V, Series 20V
- Current - Output (Max)：Parallel 240mA, Series 120mA
- 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-3-20 is a laminated core power transformer designed for board mount applications. It operates at 50 Hz or 60 Hz with dual primary windings rated for 115 VAC and 230 VAC. The secondary configuration provides parallel 10 V and series 20 V outputs, supporting maximum currents of 240 mA in parallel mode and 120 mA in series mode. With a power rating of 2.4 VA, it utilizes through-hole solder pin termination. 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 for flexible 115 VAC or 230 VAC input selection
- Split bobbin construction providing Class 2 isolation safety compliance
- Through-hole mounting design with solder pin termination for PCB integration
Applications
- Low-power AC to DC conversion circuits
- Industrial control panel power supplies
- Consumer electronics internal power distribution
Procurement Notes
Verify the specific datasheet revision and RoHS compliance status prior to ordering, as manufacturing relocation notices may affect production details. Confirm that the required secondary current ratings align with the parallel or series operational modes defined in the official specifications. Ensure the footprint matches the standard through-hole dimensions provided in the mechanical drawings.
Selection Notes
Select this component when a compact 2.4 VA transformer is required for Class 2 isolated power supplies. The dual primary winding allows compatibility with both North American and international voltage standards without changing hardware. Consider the physical dimensions and through-hole requirements during PCB layout to ensure adequate clearance and mechanical stability.
Part Context
This part belongs to the Split/Tran™ DST series, which features split bobbin transformers designed for enhanced safety isolation. The series offers various power ratings and voltage configurations, maintaining consistent laminated core construction and through-hole mounting characteristics across different models within the family.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation.
