Wurth Elektronik WE-PD2 3521 Unshielded Surface Mount Inductor, 33μH ±10%, 430mA, Ferrite Core, 7447732133

The Wurth Elektronik 7447732133 WE-PD2 3521 is an unshielded surface mount inductor engineered for reliable energy storage and filtering in high-frequency switching regulator circuits, embedded systems, DC/DC converters, and other compact electronic assemblies. It offers a nominal inductance of 33 microhenries with a ±10% tolerance, ensuring tightly controlled and well-predicted inductive properties across design variations.

This inductor utilizes a robust ferrite core, providing optimal performance in the MHz frequency range while maintaining low AC and DC losses. With a maximum DC current rating of 430 milliamps and a maximum DC resistance of just 970 milliohms, it efficiently supports circuit designs requiring stable current handling and minimal power loss. The component also achieves a self-resonant frequency of up to 24MHz, supporting usage in fast digital and switching environments.

Measuring 3.5mm in length, 3mm in depth, and 2.1mm in height, this inductor's compact 3521 case size and surface-mount design enable high-density PCB layouts. Its moulded construction delivers mechanical resilience, while the absence of shielding reduces cost and allows for integration into circuits where moderate EMI is acceptable. The part is suitable for tape and reel packaging, making it compatible with automated assembly processes.

The WE-PD2 3521 series is designed to operate reliably from -40 degrees Celsius to +125 degrees Celsius, covering a wide range of industrial, telecommunications, and consumer electronic applications. The recommended soldering procedure is reflow, ensuring safe PCB manufacturing integration. This part is especially useful in power supply filters, noise attenuation, energy storage, and timing circuits common to embedded computing, graphic cards, mainboards, and industrial controllers.

Environmentally, the inductor complies with REACH and RoHS standards, offering designers assurance regarding hazardous material restrictions. Its open structure further allows for rapid magnetic response and low loss, making it a go-to choice in high-efficiency power management circuits.

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