DMT-7-15

Overview

The DMT-7-15 is a laminated core power transformer manufactured by Signal Transformer, designed for chassis mounting applications. It features dual primary windings rated for 115 VAC and 230 VAC operation at 50 Hz or 60 Hz frequencies. The unit provides dual secondary outputs of 5 V at 2.8 A and 15 V at 280 mA, resulting in a total power rating of 7 VA. Physical dimensions are approximately 93.5 mm in length, 49.2 mm in width, and 57.8 mm in height. The component utilizes plug-in termination and is certified to UL and CSA standards.

Feature Summary

• Dual primary winding configuration supporting both 115 VAC and 230 VAC input voltages
• Dual secondary windings providing independent 5 V and 15 V output rails
• Laminated core construction optimized for standard 50/60 Hz line frequencies
• Chassis mount installation style with plug-in termination type

Applications

• Regulated power supplies requiring 5 VDC and ±12 VDC or ±15 VDC outputs
• Audio equipment power distribution systems
• Telecommunications infrastructure components

Procurement Notes

Verify the specific datasheet version before procurement, as manufacturer documentation may list variations in physical dimensions or weight compared to distributor summaries. Confirm that the dual secondary current ratings align with the intended load requirements. Ensure the chassis mounting holes match the mechanical specifications provided in the official Signal Transformer product drawings. Cross-reference the UL and CSA certification marks against local regulatory compliance needs for the final assembly.

Selection Notes

Select this component when a single transformer must provide two distinct low-voltage DC rails derived from AC mains. The dual primary design allows flexibility for international voltage standards without changing hardware. Consider the 7 VA power limit when calculating total thermal dissipation and load balance between the 5 V and 15 V outputs. The chassis mount form factor requires adequate panel space and ventilation clearance relative to the specified length and height measurements.

Part Context

The DMT-7-15 belongs to the DMT series of split bobbin power transformers produced by Signal Transformer (formerly Bel Fuse). This series is characterized by laminated core construction and chassis mounting capabilities. It serves as a fundamental power conversion element in industrial and commercial electronics where isolated AC-to-AC transformation is required prior to rectification and regulation stages.

Replacement Considerations

Direct substitutes within the same family include the DMT-6-12, which offers similar chassis mounting but lower power capacity and different secondary configurations. Verify compatibility based on exact VA rating, secondary voltage/current requirements, and physical footprint constraints before swapping models.