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DST-2-120
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Product Detailed Parameters
- Description：PWR XFMR LAMINATED 1.1VA TH
- Series：DST
- Mfr：Signal Transformer
- Package：Bulk,Bulk
- Type：Laminated Core
- Voltage - Primary：115V, 230V
- Voltage - Secondary (Full Load)：Parallel 60V, Series 120V
- Current - Output (Max)：Parallel 20mA, Series 10mA
- Primary Winding(s)：Dual
- Secondary Winding(s)：Dual
- Center Tap：No
- Power - Max：1.1VA
- Mounting Type：Through Hole
- Termination Style：PC Pin
- Size / Dimension：34.90mm L x 28.60mm W
- Height - Seated (Max)：24.60mm
- Voltage - Isolation：2500Vrms
- Weight：0.17 lb (77.11 g)
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Overview
The DST-2-120 is a Class 2 power transformer from the DST series, manufactured by Signal Transformer. It features a laminated core and dual primary winding rated for 115 VAC and 230 VAC in parallel configuration. The dual secondary winding provides split outputs of 60 V at 20 mA or 120 VCT at 10 mA. With a power rating of 1.1 VA, it utilizes through-hole mounting and measures 34.9 mm in length, 28.6 mm in width, and 36.9 mm in height.
Feature Summary
- Dual cavity platform design for versatile electrical configurations
- Class 2 safety isolation with high dielectric strength
- Split bobbin construction supporting multiple voltage taps
Applications
- Industrial control panel power supplies
- Instrumentation requiring isolated low-voltage DC rails
- Equipment utilizing split-phase rectification circuits
Procurement Notes
Verify that the specific order matches the required secondary current ratings (10 mA for 120 VCT or 20 mA for 60 V) to ensure compatibility with the load circuit. Confirm that the dual primary winding configuration aligns with the available line voltage (115 VAC or 230 VAC). Ensure mechanical clearance accommodates the specified package dimensions for proper chassis or PCB installation.
Selection Notes
Select this component when a compact, Class 2 isolated transformer is needed for low-power applications requiring split secondary voltages. The dual primary winding allows flexibility for different input line voltages without changing the part number. Consider the 1.1 VA power limit when designing the downstream rectifier and filter stages to prevent saturation.
Part Context
This model belongs to the DST series, which utilizes a dual cavity platform architecture. This design distinguishes it from standard single-cavity transformers by offering enhanced isolation capabilities and flexible winding options within a small footprint suitable for dense electronic assemblies.
Replacement Considerations
The ST-2-120 is a related variant within the same series. Verify if the single-primary configuration of the ST-2-120 meets the input voltage requirements, as the DST-2-120 specifically supports dual primary windings for both 115 VAC and 230 VAC inputs.
