Product Overview
DO3316P-224 SMD Power Inductor 220uH 800mA Unshielded Ferrite Drum Core
Condition
Unused NOS. Units visible in tape, each showing red/red/yellow dot markings on black toroid bodies with no visible damage. Sourced from an electronics distributor consolidating inventory. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
DO3316P-224 surface mount power inductor, 220uH inductance, 800mA current rating. Part of the Coilcraft DO3316P series. Unshielded drum core ferrite construction with red/red/yellow dot color coding confirmed on the physical units. Dimensions 12.95mm x 9.4mm x 5.21mm. Designed for SMD installation on a PCB - not compatible with through-hole applications without modification.
Key Features
- Inductance: 220uH, ±20% tolerance
- RMS current (Irms): 800mA
- Saturation current (Isat): 800mA
- DC resistance max (DCR): 0.61 ohm
- Self-resonant frequency (SRF): 5MHz typical
- Core material: Ferrite, unshielded drum core construction
- Package: SMD, 12.95mm x 9.4mm x 5.21mm
- Color coding: Red/red/yellow dots confirmed on physical units
Applications
- Repair tech pulling a failed power inductor off a laptop or gaming console board and soldering in the DO3316P-224 to restore the DC-DC converter stage
- Prototype engineer integrating this into a power management module layout, verifying inductance and DCR against the design budget before committing to a board run
- Industrial maintenance tech replacing a failed filter inductor on a control board to clear voltage ripple and get a drive or PLC back online
- Maker or hobbyist building a boost or buck converter on a custom PCB and needing a compact 220uH SMD inductor for the energy storage stage
- Small-batch fabricator populating boards for embedded systems requiring stable, low-noise power delivery
Frequently Asked Questions
Is this compatible with standard Coilcraft DO3316P-224 PCB footprints?
The part number and physical dimensions (12.95mm x 9.4mm x 5.21mm) match the Coilcraft DO3316P-224. Buyers using a PCB footprint designed for the standard DO3316P-224 should find this a direct fit. The seller's sourcing notes identify these as Coilcraft DO3316P-224 units.
What is the inductance tolerance?
±20%. This is the standard tolerance for the DO3316P-224 series. For precision or highly sensitive filtering applications, verify that ±20% is acceptable for your design.
Is this part shielded?
No. This is an unshielded drum core inductor. The open magnetic flux path can generate EMI and may be more susceptible to external magnetic fields compared to shielded alternatives. Factor this into your layout and application requirements before ordering.
What quantity is included?
Photos show units in tape. The quantity available is listed in the store. Each unit carries the same red/red/yellow dot markings and NOS condition.
Are accessories or documentation included?
Not included. This is the inductor only.
Red, red, yellow - the color code that tells the whole story at a glance. These sat in distributor stock untouched, and now they are ready to go to work in whatever circuit needs a steady 220uH to keep things smooth.
