The 5526R series from API Delevan, Inc., is a lineup of fixed inductors designed for surface mount applications. These inductors come in air core wirewound construction, offering a robust solution for high-frequency circuits. They are available in two primary inductance values: 491 nH and 538 nH, both with a ±5% tolerance and a current rating of 2 mA.

These components are commonly found in a variety of electronic systems where precise inductive behavior is required without the need for external magnetic cores. If you're working on RF filters, power supply decoupling, or impedance matching networks, these inductors are a go-to choice. One thing worth noting is their air core design, which helps minimize parasitic capacitance and inductance variations due to temperature changes, making them ideal for applications where stability over a wide range of temperatures is crucial.

Engineers tend to reach for this when they need a compact, surface-mountable inductor that doesn't introduce significant parasitics into the circuit. The ±5% tolerance ensures consistent performance across different batches, which is particularly important in production environments. Additionally, the 2 mA current rating makes them suitable for low-power applications where higher currents might be problematic.