105-392K

Overview

The Delevan 105-392K is an unshielded surface-mount RF inductor with a nominal inductance of 3.9 uH and a tolerance of 1%. It features a maximum DC resistance of 2.8 Ohms and supports a maximum DC current of 185 mA. The component exhibits a minimum Q factor of 25 and a self-resonant frequency of 57 MHz. Its physical dimensions are 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height.

Feature Summary

• Unshielded wirewound construction for radio frequency applications
• Temperature stable ferrite core design
• Standard SMD/SMT termination style for PCB mounting

Applications

• RF circuit filtering
• Impedance matching networks
• General purpose radio frequency signal processing

Procurement Notes

Verify end-of-life status before integration, as the component is listed as discontinued. Confirm RoHS compliance details through official documentation, as records indicate non-compliance. Ensure supply chain sources provide valid traceability for legacy components. Validate that replacement strategies account for the obsolescence of this specific Delevan part number.

Selection Notes

Select this component for low-current RF applications requiring precise 3.9 uH inductance. Consider the 1% tolerance for tight circuit requirements. Evaluate the 185 mA current limit against operational loads. Compare the 57 MHz self-resonant frequency with target signal frequencies to ensure effective operation within the desired bandwidth constraints.

Part Context

This part belongs to the Delevan 105/R series of micro chip inductors. It shares dimensional similarities with other variants in the family but differs in electrical specifications. The series targets compact RF designs where standard shielding is not required. It represents a legacy solution from API Delevan for specialized electronic assemblies.

Replacement Considerations

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