750311423

Overview

The Würth Elektronik 750311423 is a surface-mount flyback transformer designed for DC/DC converters within the WE-FB series. It features a primary voltage of 36V and an auxiliary voltage of 10V at 20mA, with 1500Vrms isolation capability. The inductance is 50µH measured at 10kHz, operating at a frequency of 100kHz. Designed for temperatures between -40°C and 125°C, it measures 13.46mm x 17.75mm with a maximum height of 12.83mm. This component is intended for use with Linear Technology chipsets including LT3573, LT3574, LT3575, and LT3748.

Feature Summary

• Provides high-voltage isolation suitable for safety-critical power conversion applications
• Engineered specifically for integration with designated Linear Technology switching regulators
• Supports high-temperature operation for robust performance in demanding environments

Applications

• Flyback converter circuits
• DC/DC power supply modules
• Switching Mode Power Supplies (SMPS)

Procurement Notes

Verify the manufacturer part number against official Würth Elektronik documentation to ensure authenticity. Confirm that the specific package variant matches your PCB footprint requirements. Check RoHS compliance status if restricted substances are a constraint for your assembly process. Ensure the component is sourced from authorized distributors to guarantee traceability and quality assurance standards are met.

Selection Notes

Select this component when designing flyback topologies using compatible Linear Technology controllers such as the LT3748. Consider the 50µH inductance value and 100kHz operating frequency during magnetic design calculations. Verify that the 1500Vrms isolation rating meets the safety requirements of your target application. Ensure the surface-mount dimensions fit within the available board space constraints.

Part Context

This transformer belongs to the WE-FB series, which provides pre-matched solutions for specific controller families. It simplifies the design process by offering optimized magnetic components tailored for Linear Technology ICs. The series supports various power levels and isolation requirements, allowing engineers to standardize on proven designs while reducing development time and risk associated with custom magnetics.

Replacement Considerations

Direct substitutes include other parts in the WE-FB series designed for the same Linear Technology controllers. Verify pinout compatibility and electrical parameters before substitution. Consult the manufacturer's cross-reference tools for approved alternatives that maintain identical performance characteristics and form factors.