Alternatives to STMicroelectronics ECMF02-4CMX8
STMicroelectronics ECMF02-4CMX8 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 ECMF02-4CMX8STMicroelectronics |  ECMF2-40A100N6STMicroelectronics |  ECMF2-40A100M6YSTMicroelectronics | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Housed in a 6-pin uQFN-6L package instead of the original 8-pin uQFN-8L package, requiring a complete footprint and landing pattern layout redesign.Significantly smaller dimensions (1.40mm x 1.35mm vs 2.50mm x 1.20mm) and different physical shape.Successfully filters and protects the D+/D- differential data lines, but lacks the auxiliary ESD protection channels for the VBUS and ID lines that the original 8-pin part offered. | Housed in a uQFN-6L package instead of the original uQFN-8L, resulting in layout incompatibility.Smaller physical dimensions (1.40mm x 1.35mm vs 2.50mm x 1.20mm) requiring a new footprint.Filters and protects the main USB differential pair, but misses the extra VBUS/ID lines. | ||
 AI Summary | ECMF02-4CMX8 by STMicroelectronics: 2 Line Common Mode Choke Surface Mount DCR 4Ohm. | This is the official newer-generation replacement recommended by STMicroelectronics. While it offers superior modern ESD and EMI filtering performance, it has a smaller 6-pin footprint and lacks auxiliary VBUS/ID ESD protection.
| An automotive-qualified equivalent of the ECMF2-40A100N6, offering superior structural reliability for harsh environments at the cost of requiring a layout redesign.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 2 Line Common Mode Choke Surface Mount DCR 4Ohm | 2 Line Common Mode Choke Surface Mount 100mA DCR 3Ohm (Typ) | Line Common Mode Choke DCR | |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics | |
| Type | Common Mode Chokes | Common Mode Chokes | Common Mode Chokes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 13 weeks | 13 weeks | 13 weeks | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8548.00.0000 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Features | TVS Diode ESD Protection | - | - | |
| Filter Type | Signal Line | - | - | |
| Height (Max) | 0.022" (0.55mm) | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | 8-UFDFN | - | - | |
| Number of Lines | 2 | - | - | |
| Size / Dimension | 0.098" L x 0.047" W (2.50mm x 1.20mm) | - | - | |
| Operating Temperature | -30°C ~ 85°C | - | - |
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Frequently asked questions
Yes. The STMicroelectronics ECMF02-4CMX8 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the STMicroelectronics ECMF02-4CMX8 are the ECMF2-40A100N6 (STMicroelectronics) and the ECMF2-40A100M6Y (STMicroelectronics), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the ECMF02-4CMX8 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The ECMF02-4CMX8 (STMicroelectronics) is a part in the Common Mode Chokes category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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