DST-2-28

Overview

The Signal Transformer DST-2-28 is a laminated core power transformer designed for through-hole mounting. It features dual primary windings rated for 115V and 230V operation, providing versatility for international voltage standards. The secondary configuration offers parallel 14V and series 28V outputs with corresponding current ratings of 80mA in parallel and 40mA in series. With a maximum power rating of 1.1VA, this Class 2 transformer ensures electrical isolation of 2500Vrms between windings.

Feature Summary

• Dual primary winding design supports both 115VAC and 230VAC input configurations.
• Split bobbin construction facilitates compliance with Class 2 safety regulations.
• Through-hole termination style enables secure printed circuit board integration.

Applications

• Low-power industrial control systems requiring isolated DC supply rails
• Consumer electronics utilizing Class 2 compliant power architectures
• Medical devices necessitating high electrical isolation standards

Procurement Notes

Verify the specific datasheet version to confirm RoHS compliance status and recent manufacturing relocation notices. Ensure that the required secondary voltage configuration matches the application's parallel or series needs. Confirm package quantity requirements as items may be supplied in bulk or tape-and-reel formats depending on distributor stock.

Selection Notes

Select the DST-2-28 when a compact 1.1VA transformer is needed for dual-voltage primary applications. The split bobbin design is critical for meeting strict insulation clearance requirements. Consider physical dimensions of 34.90mm length and 28.60mm width for PCB layout constraints. This model serves as a direct replacement for older ST-series components within the same family.

Part Context

The DST-2-28 belongs to the Split/Tran™ Class 2 Split Bobbin Transformers series by Signal Transformer. This line emphasizes enhanced safety isolation through separated winding structures. The component is manufactured under the Bel Signal Transformer brand and is widely distributed for general-purpose power conversion tasks.

Replacement Considerations

The ST-MS accessory provides necessary mounting hardware for installation. Direct functional substitutes within the DST series include models like DST-2-10 or DST-2-56, which share identical mechanical footprints and primary specifications but differ in secondary output voltages.