Alternatives to onsemi MMBT3640
onsemi MMBT3640 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 MMBT3640onsemi |  MMBT4126LT1Gonsemi |  MMBTH81onsemi | +2more | |
|---|---|---|---|---|
| FFF Compatibility | SOT-23-3 package with standard pin layout matching the original MMBT3640 (Pin 1: Base, Pin 2: Emitter, Pin 3: Collector).Standard physical dimensions of SOT-23 (TO-236-3) align directly.Transition frequency is lower at 250 MHz compared to the original 500 MHz, which may affect ultra-high speed switching designs. | Housed in a standard SOT-23-3 package utilizing the same pinout style (1-Base, 2-Emitter, 3-Collector).Same footprint and packaging dimensions.Maximum collector current is limited to 50 mA compared to 200 mA on the original MMBT3640. | ||
 AI Summary | MMBT3640 by onsemi: Bipolar (BJT) Transistor PNP 12 V 200 mA 500MHz 225 mW Surface Mount SOT-23-3. | This is a direct manufacturer-recommended substitute from onsemi. It perfectly matches the physical footprint, pinout configuration, and 200 mA current capability while offering an improved 25 V breakdown voltage. The transition frequency is 250 MHz, which serves well for most high-speed switching needs though it is lower than the original's 500 MHz.
| This active RF transistor is ideal if the original MMBT3640 was being used in its upper frequency boundaries. It boasts an improved 600 MHz transition frequency and a 20 V rating, though its collector current is restricted to 50 mA. This is an excellent alternative for signal processing or low-current RF switching circuits.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Bipolar (BJT) Transistor PNP 12 V 200 mA 500MHz 225 mW Surface Mount SOT-23-3 | Bipolar (BJT) Transistor PNP 25 V 200 mA 250MHz 225 mW Surface Mount SOT-23-3 (TO-236) | RF Transistor PNP 20V 50mA 600MHz 225mW Surface Mount SOT-23-3 | |
| Manufacturer | onsemi | onsemi | onsemi | |
| Type | Transistors | Transistors | Transistors | |
| Datasheet | Open | Open | Open | |
| Lead Time | 39 weeks | 49 weeks | 11 weeks | |
| Country of Origin | JP | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.21.0075 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Power - Max | 225 mW | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | - | - | |
| Transistor Type | PNP | - | - | |
| Operating Temperature | -55°C ~ 150°C (TJ) | - | - | |
| Frequency - Transition | 500MHz | - | - | |
| Supplier Device Package | SOT-23-3 | - | - | |
| Vce Saturation (Max) @ Ib, Ic | 600mV @ 5mA, 50mA | - | - |
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Related parts
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|---|---|---|---|
 MMBT3904onsemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
| MMBT3904LT1onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 MMBT100Aonsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 MMBT2907ASTMicroelectronics | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| MMBD914onsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
| MMBT2907ALT1onsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi MMBT3640 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 MMBT3640 are the MMBT4126LT1G (onsemi) and the MMBTH81 (onsemi), 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 MMBT3640 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 MMBT3640 (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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