105-821H

Overview

The Delevan 105-821H is a fixed surface-mount RF inductor with an inductance of 820 nH and a tolerance of ±3%. It features an unshielded wirewound construction suitable for high-frequency applications. The component supports a maximum DC current of 385 mA and has a maximum DC resistance of 650 mOhms. It exhibits a minimum Q factor of 30 and a self-resonant frequency of 155 MHz. The physical dimensions are 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height.

Feature Summary

• Unshielded wirewound design for RF signal processing
• Compact nonstandard package footprint for PCB mounting
• Stable inductance characteristics at high frequencies

Applications

• RF circuit filtering
• Impedance matching networks
• High-frequency signal conditioning

Procurement Notes

Verify component status carefully as the 105-821H is listed as obsolete or discontinued by major distributors. Confirm availability through authorized channels or secondary markets if sourcing is required. Ensure that any replacement parts meet identical electrical specifications and mechanical dimensions to maintain circuit integrity without redesign.

Selection Notes

Select this component when an unshielded 820 nH inductor is required for RF applications. Consider the 385 mA current rating and 650 mOhm resistance limits during design. Evaluate the 155 MHz self-resonant frequency to ensure operation remains within the desired bandwidth. Compare against shielded alternatives if electromagnetic interference mitigation is necessary.

Part Context

This part belongs to the Delevan 105/R series of fixed RF inductors. It utilizes a wirewound technology distinct from chip-style inductors. The series provides standard values for radio frequency circuits. The manufacturer API Delevan Inc. produces these components for specialized electronic applications requiring precise inductance.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The component is marked as obsolete. Designers should consult official manufacturer substitution guides or engineering support for valid cross-reference data before implementation.