103R-331J

Overview

The Delevan 103R-331J is a fixed, unshielded RF inductor designed for surface-mount technology applications. It features a nominal inductance of 330 nH with a tolerance of ±5%. The component has a nonstandard footprint measuring 2.54 mm by 2.54 mm and a maximum seated height of 1.91 mm. Key electrical specifications include a maximum DC resistance of 235 mOhms and a minimum Q factor of 25. The self-resonant frequency is rated at 300 MHz, and the maximum DC current rating is 645 mA.

Feature Summary

• Unshielded construction suitable for high-frequency RF circuits
• Surface-mount design with a compact 2.54 mm x 2.54 mm footprint
• High self-resonant frequency capability for signal integrity

Applications

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

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required tolerance and packaging options. Confirm that the nonstandard lead configuration matches the target PCB layout constraints. Cross-reference the maximum DC current rating against the circuit's operational load to prevent thermal issues. Ensure the unshielded nature does not interfere with adjacent sensitive components in dense assemblies.

Selection Notes

Select this component when a small form factor is required for RF stages operating near 300 MHz. The low DC resistance supports efficient power handling up to 645 mA. Consider the unshielded design if magnetic coupling with nearby parts must be minimized or managed through layout spacing rather than containment.

Part Context

This part belongs to the API Delevan series of fixed RF inductors. These components are engineered for stability in radio frequency environments. The 103R series typically offers various inductance values within a consistent physical envelope, allowing designers to standardize board space while adjusting circuit parameters.

Replacement Considerations

Direct substitutes require matching the 330 nH value, 2.54 mm x 2.54 mm footprint, and similar DCR limits. Verify that alternative manufacturers provide comparable Q factors at the target frequency.