103R-121F

Overview

The Delevan 103R-121F is an unshielded surface-mount RF inductor with a nominal inductance of 120 nH and ±1% tolerance. It features a maximum DC resistance of 125 mΩ and a rated current of 880 mA. The component exhibits a minimum Q factor of 42 at 100 MHz and a self-resonant frequency of 400 MHz. Designed for high-frequency applications, it operates within a temperature range of -55°C to +125°C and utilizes a ferrite core.

Feature Summary

• High precision ±1% inductance tolerance ensures stable performance in sensitive RF circuits
• Unshielded construction minimizes parasitic capacitance for optimal high-frequency signal integrity
• Ferrite core material provides efficient magnetic coupling with low core losses

Applications

• RF matching networks
• Impedance transformation stages
• High-frequency signal filtering

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with standard SMT reflow profiles and check for any recent lifecycle status updates or obsolescence notices prior to finalizing procurement plans.

Selection Notes

Select this component when tight inductance accuracy is critical for RF circuit tuning. The 120 nH value and 400 MHz self-resonant frequency make it suitable for VHF band applications. Consider the unshielded design implications regarding electromagnetic interference and layout spacing requirements during PCB integration.

Part Context

This part belongs to the Delevan 103 series of fixed RF inductors. These components are engineered for surface-mount technology and are characterized by their compact footprint and consistent electrical performance across wide temperature ranges. The series is widely used in telecommunications and consumer electronics requiring reliable passive RF components.

Replacement Considerations

Cross-reference with other 120 nH ±1% SMD inductors from manufacturers such as API Delevan or Murata. Verify that substitute parts match the 125 mΩ DCR limit and 880 mA current rating to maintain circuit performance without modification.