103R-561FS

Overview

The Delevan 103R-561FS is an unshielded surface-mount RF inductor with a nominal inductance of 560 nH and a tolerance of ±1%. It features a maximum DC resistance of 278 mOhms and supports a maximum DC current of 590 mA. The component exhibits a minimum Q factor of 22 at 25 MHz and achieves a self-resonant frequency of 175 MHz. Physically, it measures 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height. Designed for PCB mounting, it operates within a temperature range of -55°C to 125°C.

Feature Summary

• Unshielded construction suitable for applications requiring minimal magnetic interference
• High precision ±1% inductance tolerance for accurate circuit tuning
• Robust thermal stability across a wide operating temperature range

Applications

• RF signal filtering circuits
• Impedance matching networks
• Oscillator tank circuits

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact electrical tolerances and material specifications. Ensure that the procurement channel provides valid traceability records consistent with Delevan's quality standards. Confirm that the delivered components match the specified package dimensions and terminal configuration required by the target PCB layout.

Selection Notes

Select this component when precise inductance control is critical for RF performance. The unshielded design requires careful placement to avoid unwanted coupling with nearby traces. Evaluate the 590 mA current rating against peak load requirements to prevent saturation. Consider the 175 MHz self-resonant frequency limit to ensure operation remains below the parasitic resonance point.

Part Context

This part belongs to the 103/R series of fixed RF inductors manufactured by Delevan. The series utilizes ferrite core technology optimized for high-frequency stability. Components in this family share standardized SMD footprints to facilitate automated assembly processes while maintaining consistent electrical characteristics across different inductance values.

Replacement Considerations

Cross-reference with other 103-series variants such as 103-561F or 103R-681HS only if dimensional compatibility and electrical parameters align precisely. Verify that substitute parts maintain the same ±1% tolerance and unshielded configuration to preserve circuit behavior.