105R-391G

Overview

The Delevan 105R-391G is a fixed surface-mount RF inductor designed for high-frequency applications. It provides an inductance of 390 nH with a tight ±2% tolerance, ensuring precise circuit performance. The component features a maximum DC resistance of 280 mOhm and a current rating of 585 mA. Its self-resonant frequency is specified at 185 MHz, making it suitable for microwave and RF filtering tasks. The unit operates within a temperature range of -55°C to 125°C and is tested at 25 MHz.

Feature Summary

• High precision inductance with ±2% tolerance for stable RF performance
• Compact surface-mount design optimized for space-constrained PCB layouts
• Wide operating temperature range supporting harsh environmental conditions

Applications

• RF signal filtering circuits
• Microwave communication systems
• Impedance matching networks

Procurement Notes

Verify the specific suffix (G vs K) against the original equipment manufacturer's bill of materials, as tolerance and packaging may differ. Confirm that the 105R-391G designation matches the required 390 nH value and 2% tolerance specifications. Ensure compatibility with existing surface-mount reflow profiles and check for any regional shipping restrictions or obsolete status alerts from authorized distributors before finalizing procurement orders.

Selection Notes

Select this component when a precise 390 nH inductance with minimal deviation is critical for RF stability. The low DC resistance supports efficient power handling up to 585 mA without excessive heat generation. Consider the 185 MHz self-resonant frequency limit to ensure operation remains below resonance for inductive behavior. Evaluate the physical footprint requirements against available board space and verify thermal management capabilities for the intended operating environment.

Part Context

This part belongs to the API Delevan micro i-chip inductor family, known for compact SMD designs. Similar variants include the 105R-471K and 105-271K, which offer different inductance values and tolerances. The series is engineered for consistent performance in high-frequency electronic applications requiring reliable passive components.

Replacement Considerations

Cross-reference with API Delevan part numbers such as 105R-471K for different inductance needs. Verify exact electrical parameters and package dimensions before substituting to maintain circuit integrity.