103R-183H

Overview

The Delevan 103R-183H is a fixed surface-mount RF inductor with an inductance of 18 µH and a tolerance of ±3%. It features an unshielded ferrite core design, measuring 2.54 mm x 2.54 mm x 1.91 mm. The component has a maximum DC resistance of 5.8 Ohms and supports a maximum DC current of 130 mA. It exhibits a Q factor of at least 25 at 2.5 MHz and a self-resonant frequency of 28 MHz.

Feature Summary

• Unshielded wirewound construction for minimal parasitic capacitance
• Ferrite core material optimized for high-frequency stability
• Low-profile SMD package suitable for dense PCB layouts

Applications

• RF signal processing circuits
• Impedance matching networks
• Filtering applications in communication equipment

Procurement Notes

Verify the specific suffix 'H' against the manufacturer's latest datasheet to confirm tolerance and impedance specifications. Ensure compatibility with RoHS directives if required by the end application. Confirm lead availability directly with authorized distributors as stock levels fluctuate.

Selection Notes

Select this component when a compact, unshielded RF inductor is required for frequencies around 2.5 MHz. Compare the 130 mA current rating against circuit requirements. Consider the 5.8 Ohm DCR impact on power loss. Verify that the non-shielded design does not interfere with nearby sensitive components.

Part Context

This part belongs to the Delevan 103/R series of low-profile SMD RF inductors. The series offers various inductance values in a standardized 0100 footprint. The 'R' suffix typically denotes the series family, while 'H' indicates specific tolerance and performance characteristics within that line.

Replacement Considerations

The 103-183H is a verified substitute with identical electrical parameters and physical dimensions. Check for RoHS compliance differences between legacy and current production batches.