105R-821F

Overview

The Delevan 105R-821F is an unshielded surface-mount RF inductor with a nominal inductance of 820 nH and a tolerance of ±1%. It features a maximum DC resistance of 650 mOhms and supports a maximum DC current of 385 mA. The component exhibits a minimum Q factor of 30 at its self-resonant frequency of 155 MHz. Designed for PCB mounting, it operates within a temperature range of -55°C to +125°C.

Feature Summary

• Unshielded wirewound construction for RF applications
• High self-resonant frequency capability
• Compact surface-mount footprint

Applications

• RF circuit filtering
• Impedance matching networks
• Oscillator circuits

Procurement Notes

Verify the specific suffix (e.g., F, G) against official API Delevan documentation to confirm exact tolerance and availability status. Confirm RoHS compliance requirements as historical data may vary by production batch. Ensure the ordering information matches the precise electrical parameters required for the design.

Selection Notes

Select this component when an unshielded SMD inductor with 820 nH nominal value is required. Verify that the 385 mA current rating and 650 mOhm DCR meet the circuit constraints. Consider the 155 MHz self-resonant frequency limit for high-frequency operation suitability.

Part Context

This part belongs to the 105/R series of fixed RF inductors manufactured by API Delevan. These components are designed for general-purpose radio frequency applications requiring stable inductance values in a small surface-mount package.

Replacement Considerations

Direct substitutes include the 105-821HS and 105R-821G from the same manufacturer family. Verify pin compatibility and electrical parameter alignment before substitution.