105-681K

Overview

The Delevan 105-681K is a fixed micro chip inductor designed for surface-mount applications. It features an unshielded construction with a tolerance of ±10%. The component provides an inductance of 680 nH and supports a maximum DC current of 395 mA. Its maximum DC resistance is specified at 620 mOhms, with a minimum Q factor of 35. The self-resonant frequency reaches 175 MHz. Physical dimensions are non-standard, measuring approximately 2.3 mm by 1.7 mm.

Feature Summary

• Unshielded micro chip inductor design suitable for compact PCB layouts
• High self-resonant frequency capability for RF signal processing
• Surface-mount termination style for automated assembly integration

Applications

• RF circuit filtering and impedance matching
• Signal conditioning in communication modules
• Power supply noise suppression in portable electronics

Procurement Notes

Verify RoHS compliance status prior to procurement as documentation indicates potential variations. Confirm the specific manufacturing lot against the latest datasheet revisions to ensure parameter consistency. Check for authorized distributor availability due to potential stock fluctuations. Validate that the non-standard package dimensions align with the target PCB footprint requirements before finalizing orders.

Selection Notes

Select this component when a low-profile, unshielded inductor is required for high-frequency RF applications. Ensure the 395 mA current rating meets the circuit's operational demands without saturation. Consider the 620 mOhm DC resistance impact on power loss. Verify that the ±10% tolerance fits the system's precision requirements compared to tighter tolerance alternatives.

Part Context

This part belongs to the Delevan micro chip inductor series, characterized by small form factors for space-constrained designs. It serves as a passive component for filtering and energy storage in radio frequency circuits. The unshielded nature distinguishes it from shielded variants, potentially affecting nearby component placement strategies.

Replacement Considerations

Direct substitutes include parts with identical 680 nH inductance and similar current ratings. Verify physical footprint compatibility for the non-standard 2.3x1.7mm package. Ensure replacement components maintain the 175 MHz self-resonant frequency specification for RF performance parity.