750817251

Switching Converter, SMPS Transformers Overview

The Würth Elektronik 750817251 is a through-hole offline flyback transformer designed for AC/DC converters and SMPS applications. It features a primary voltage rating of 85 to 305 VAC and provides 4500 Vrms isolation. The component operates at a frequency of 60 kHz with an inductance of 250 µH at 10 kHz. It includes an auxiliary voltage output of 24 V @ 20 mA. The physical dimensions are 31.00 mm in length and width, with a maximum height of 25.00 mm. The unit utilizes a stacked core style and is compatible with the LT3799 chipset.

Switching Converter, SMPS Transformers Feature Summary

• Provides high-voltage isolation of 4500 Vrms for safety in offline power supplies
• Designed specifically for flyback converter topologies in AC/DC conversion
• Supports wide input voltage range from 85 to 305 VAC
• Includes auxiliary winding for control circuit powering

Switching Converter, SMPS Transformers Applications

• Offline AC/DC power supply units
• Switched-mode power supplies (SMPS)
• Flyback converter circuits
• General electronic equipment power stages

Switching Converter, SMPS Transformers Procurement Notes

Verify the specific datasheet revision and mechanical drawings prior to integration. Confirm that the through-hole mounting style aligns with the target PCB layout and assembly processes. Ensure the operating temperature range of -40°C to 125°C meets the environmental requirements of the final application. Cross-reference the LT3799 chipset compatibility if using that specific controller design.

Switching Converter, SMPS Transformers Selection Notes

Select this component when a robust flyback transformer with high isolation voltage is required for universal input AC/DC designs. The 250 µH inductance value suits standard flyback operation at 60 kHz. Consider the 31x31 mm footprint and 25 mm height for enclosure clearance. The auxiliary winding simplifies bias supply design by eliminating the need for separate startup resistors or auxiliary transformers in some configurations.

Switching Converter, SMPS Transformers Part Context

This part belongs to the MID-OLLT series of offline flyback transformers from Würth Elektronik. These components are engineered for general electronic equipment and comply with RoHS3 standards. The series supports various power levels and isolation requirements common in modern switching power supply architectures.

Switching Converter, SMPS Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for direct equivalents.