105R-391F

Overview

The Delevan 105R-391F is a fixed surface-mount RF inductor with an inductance of 390 nH and a tolerance of ±1%. It features a maximum DC resistance of 280 mOhms and a rated current of 585 mA. The component utilizes an iron core and operates within a temperature range of -55°C to +125°C. It has a minimum Q factor of 35 at its test frequency and a self-resonant frequency of 185 MHz. The physical dimensions are 2.54 mm x 2.54 mm with a maximum height of 1.91 mm.

Feature Summary

• Unshielded surface-mount design for RF applications
• High precision ±1% inductance tolerance
• Iron core construction for stable performance

Applications

• RF choke circuits
• Impedance matching networks
• Filtering in radio frequency systems

Procurement Notes

Verify component availability as the 105 series may be discontinued or subject to limited supply constraints. Confirm RoHS compliance status, as some sources indicate non-compliance. Ensure the specific suffix 'F' matches the required ±1% tolerance specification during procurement to avoid confusion with other tolerance variants.

Selection Notes

Select this component when precise inductance control is critical due to its tight ±1% tolerance. Consider the 185 MHz self-resonant frequency limit for high-frequency operation. Evaluate the 585 mA current rating against circuit requirements to prevent saturation. Compare physical footprint compatibility with existing PCB layouts.

Part Context

This part belongs to the 105(R) series of fixed inductors manufactured by API Delevan Inc. The series includes various inductance values and tolerance options, such as the 105-391J variant which offers ±5% tolerance. The 105R-391F specifically targets applications requiring higher precision than standard general-purpose inductors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The 105-391J is a related variant but differs in tolerance (±5% vs ±1%) and DCR specifications. Cross-reference with other 105 series parts only if electrical parameters align precisely.