Alternatives to onsemi FDC633N
onsemi FDC633N and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 FDC633Nonsemi |  STT6N3LLH6STMicroelectronics | DMN3033LDM-7Diodes Incorporated | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts share the identical SOT-23-6 pin layout with Pins 1, 2, 5, 6 as Drain, Pin 3 as Gate, and Pin 4 as Source.Both parts are packaged in standard SOT-23-6 (TSOP-6 / SuperSOT-6) surface-mount packages with compatible landing footprints.The electrical parameters meet or exceed the original FDC633N in every critical aspect, including breakdown voltage (30V), current, and drive capability. | The pin configuration matches the original perfectly (Pins 1, 2, 5, 6 = Drain, Pin 3 = Gate, Pin 4 = Source).Packaged in standard SOT-26 / SOT-23-6 with identical physical package dimensions.Meets key voltage (30V) and power dissipation requirements while providing higher current handling. | ||
 AI Summary | FDC633N by onsemi: N-Channel 30 V 5.2A (Ta) 1.6W (Ta) Surface Mount SuperSOT™-6. | The STT6N3LLH6 is an exceptional, active drop-in replacement for the obsolete FDC633N. It features a matching 30V rating, a higher 6A current rating, and an improved on-resistance of 25 mOhm. Most importantly, its low 1.0V maximum gate threshold voltage matches the original, preserving support for low-voltage 2.5V gate drive designs.
| The DMN3033LDM-7 is a highly robust, active alternative with a higher current handling of 6.9A and a lower Rds(on) of 33 mOhm. It is fully pin-compatible and physically identical to the FDC633N, though it requires a slightly higher turn-on gate voltage.
| |
| Lifecycle Status | Obsolete | Active | Unknown | |
| Market Availability | Discontinued | In stock | Unknown | |
| REACH | Unknown | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
| Description | N-Channel 30 V 5.2A (Ta) 1.6W (Ta) Surface Mount SuperSOT™-6 | N-Channel 30 V 6A (Tc) 1.6W (Tc) Surface Mount SOT-23-6 | The DMN3033LDM-7 is a highly robust, active alternative with a higher current handling of 6.9A and a lower Rds(on) of 33 mOhm. It is fully p | |
| Manufacturer | onsemi | STMicroelectronics | Diodes Incorporated | |
| Type | Transistors | Transistors | Component | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 7 days | 18 weeks | Unknown | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.21.0095 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| FET Type | N-Channel | - | - | |
| Vgs (Max) | ±8V | - | - | |
| Technology | MOSFET (Metal Oxide) | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 | - | - | |
| Vgs(th) (Max) @ Id | 1V @ 250µA | - | - | |
| Operating Temperature | -55°C ~ 150°C (TJ) | - | - | |
| Rds On (Max) @ Id, Vgs | 42mOhm @ 5.2A, 4.5V | - | - |
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Frequently asked questions
Yes. The onsemi FDC633N 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 onsemi FDC633N are the STT6N3LLH6 (STMicroelectronics) and the DMN3033LDM-7 (Diodes Incorporated), out of 3 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 FDC633N 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 FDC633N (onsemi) is a part in the Transistors category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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