749118115

Overview

The Würth Elektronik 749118115 is a through-hole transformer designed for AC/DC converter and LED driver applications within switch-mode power supplies. It features an inductance of 2.8mH at 10kHz and operates at a frequency of 132kHz. The component provides 4000Vrms isolation voltage and supports primary voltages ranging from 120 to 385V. It functions within a temperature range of -40°C to 125°C, with physical dimensions of 20.20mm length, 24.50mm width, and a maximum installation height of 16.50mm.

Feature Summary

• Provides high-voltage isolation capability for safety-critical power conversion circuits
• Engineered specifically for integration with offline switch-mode power supply topologies
• Supports wide input voltage ranges suitable for universal AC line applications

Applications

• Industrial control systems
• Smart adapters
• Metering devices

Procurement Notes

Verify the specific datasheet version and electrical tolerances against your design requirements before ordering. Confirm that the through-hole mounting style and pin configuration match your PCB layout constraints. Ensure the operating temperature range meets the environmental conditions of the final assembly. Cross-reference compatibility with intended controller ICs such as the NCP101x or NCP105x families if applicable.

Selection Notes

Select this component when designing isolated AC/DC converters requiring robust magnetic performance at 132kHz. It is suitable for applications needing significant isolation voltage between primary and secondary sides. Consider the physical footprint and lead spacing during mechanical layout planning. Evaluate thermal management strategies given the specified operating temperature limits.

Part Context

This transformer belongs to the WE-UNIT series from Würth Elektronik, which focuses on standardized solutions for power conversion. The series aims to simplify design processes by offering pre-configured magnetic components. These parts are intended to reduce development time for engineers working on industrial and consumer power supply projects.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.