7491181124

Overview

The Würth Elektronik part number 7491181124 is an off-line transformer from the WE-UNIT series, designed for AC/DC converters and LED drivers. It features a through-hole mounting style with 4000Vrms isolation voltage. The component has an inductance of 172uH, operates at a maximum frequency of 132kHz, and supports a current rating of 0.21A with a resistance of 1.2 Ohm.

Feature Summary

• Provides high-voltage isolation suitable for off-line power supply applications
• Engineered specifically for integration into AC/DC converter topologies
• Supports efficient magnetic design for LED driver implementations

Applications

• AC/DC Switching Mode Power Supplies (SMPS)
• LED Driver circuits
• General purpose offline power conversion systems

Procurement Notes

Verify the specific datasheet version to confirm pinout compatibility and thermal characteristics before finalizing the design. Ensure that the supplier documentation explicitly lists this part number as an active component. Cross-reference the isolation voltage requirements against your system safety standards to guarantee compliance. Confirm that the through-hole package dimensions fit within your PCB layout constraints without mechanical interference.

Selection Notes

Select this transformer when designing isolated AC/DC converters requiring robust magnetic performance. It is appropriate for applications needing 4000Vrms isolation and operating frequencies up to 132kHz. Consider its 172uH inductance and 0.21A current rating to ensure it meets the energy storage and load requirements of your specific power topology. Verify compatibility with intended controller ICs such as the NCP101x series.

Part Context

This component belongs to Würth Elektronik's WE-UNIT series, which focuses on reliable magnetics for power electronics. The manufacturer specializes in electronic components and intelligent power systems, serving industrial and automotive sectors. This specific transformer addresses the need for compact, high-isolation solutions in modern power conversion designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official distributor catalogs or manufacturer cross-reference tools for compatible alternatives if this specific model is unavailable.