103R-121H

Overview

The Delevan 103R-121H is an unshielded surface-mount RF inductor with a nominal inductance of 120 nH and a tolerance of 3%. It features a maximum DC current rating of 590 mA and a maximum DC resistance of 278 mOhms. The component has a minimum Q factor of 22 and a self-resonant frequency of 195 MHz. Its physical dimensions are 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height. The unit weight is 30 mg.

Feature Summary

• Unshielded chip SMT design for RF applications
• Ferrite core construction with standard terminations
• PCB mount installation style

Applications

• RF circuit filtering
• Impedance matching networks
• General RF signal processing

Procurement Notes

Verify the specific manufacturer part number against official Delevan documentation to confirm exact electrical parameters and physical specifications. Ensure that the unshielded configuration aligns with the electromagnetic interference requirements of the target application. Cross-reference datasheets for any updates regarding RoHS compliance status or manufacturing changes before finalizing procurement orders.

Selection Notes

Select this component when an unshielded inductor is required for RF circuits to minimize parasitic capacitance effects associated with shielding. The 120 nH value suits high-frequency applications where a self-resonant frequency of 195 MHz provides adequate operational headroom. Consider the 590 mA current rating to ensure the inductor operates within its thermal limits during continuous duty cycles.

Part Context

This component belongs to the 103/R series of fixed inductors manufactured by Delevan. The series offers various inductance values tailored for radio frequency applications. The 103R-121H specifically utilizes a non-standard two-lead surface mount package, distinguishing it from shielded variants within the broader product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.