SRR4018-121Y

Fixed Inductors Overview

The Bourns SRR4018-121Y is a shielded surface-mount power inductor from the SRN/SRR4018 series, featuring a wirewound construction on a ferrite core. It provides an inductance of 120 µH with a tolerance of ±30%. The component supports a maximum DC current of 330 mA and has a maximum DC resistance of 1.95 Ω. It operates within a temperature range of -25°C to 120°C, exhibits a minimum quality factor of 9 at 100 kHz, and reaches a self-resonant frequency of approximately 1.9 MHz.

Fixed Inductors Feature Summary

• Shielded drum core design minimizes electromagnetic interference
• Wirewound structure ensures stable inductance performance
• RoHS compliant molded package for environmental safety

Fixed Inductors Applications

• DC-DC converter output filtering
• Power supply input filtering stages
• General-purpose signal processing circuits

Fixed Inductors Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to confirm electrical tolerances and packaging details. Ensure the selected variant matches the required current rating and inductance value for the target circuit design. Cross-reference the part number with official distributor catalogs to confirm availability and compliance status before finalizing procurement orders.

Fixed Inductors Selection Notes

Select this component based on its 120 µH inductance and 330 mA current handling capability. Evaluate the 1.95 Ω DC resistance for potential power loss constraints. Confirm that the 1.9 MHz self-resonant frequency aligns with the operating frequency requirements of the application circuit to ensure effective filtering performance.

Fixed Inductors Part Context

This component belongs to the Bourns SRR4018 series of shielded surface-mount power inductors. The series utilizes a wirewound technique on a ferrite core, offering high reliability for power management applications. The 4018 package size provides a compact footprint suitable for space-constrained printed circuit board layouts.

Fixed Inductors Replacement Considerations

Direct substitutes include other 120 µH shielded SMD inductors with similar current ratings, such as those from the same Bourns family or compatible competitors like TDK or Murata, provided they match the 4018 footprint and electrical specifications.