108-333K

Overview

The Delevan 108-333K is a fixed surface-mount RF inductor with a nominal inductance of 33 µH and a tolerance of ±3%. It features an unshielded construction using a ferrite core, designed for high-frequency applications. The component has a maximum DC resistance of 13 Ohms and a rated current of 45 mA. Its self-resonant frequency is 12 MHz, with a minimum Q factor of 30. Operating temperature ranges from -55°C to +125°C. The package utilizes a nonstandard two-lead SMD configuration.

Feature Summary

• Unshielded design suitable for specific RF layout requirements
• Ferrite core construction for stable inductance characteristics
• Surface-mount termination style for automated assembly

Applications

• RF choke circuits
• High-frequency signal filtering
• Impedance matching networks

Procurement Notes

Verify the exact physical dimensions and lead configuration against the target PCB footprint, as the 108 series uses a nonstandard package distinct from common metric sizes. Confirm RoHS compliance status with the supplier, as documentation indicates potential non-compliance. Ensure the 45 mA current rating meets the circuit's operational requirements to prevent saturation or thermal issues during procurement validation.

Selection Notes

Select this component when a 33 µH inductance value is required with tight ±3% tolerance for precision RF applications. The unshielded nature allows for flexible board placement but requires careful consideration of nearby magnetic interference. The 12 MHz self-resonant frequency defines the upper operational limit for effective inductive behavior in the circuit design.

Part Context

This part belongs to the 108 series of fixed inductors manufactured by API Delevan. The series is characterized by its unique nonstandard package form factor, distinguishing it from standard inch or metric SMD footprints. It serves as a specialized passive component for niche RF engineering tasks requiring specific electrical parameters within a compact physical profile.

Replacement Considerations

Direct substitutes include the 108-333H, which shares similar electrical specifications but differs in tolerance (±3% vs ±10%). Verify that alternative parts match the nonstandard physical dimensions to ensure mechanical compatibility without modifying the existing PCB layout.

FAQ

Is the 108-333K shielded?

No, the 108-333K is an unshielded inductor.

What is the self-resonant frequency of this component?

The self-resonant frequency is 12 MHz.