The MMBT3906 is a general-purpose PNP bipolar junction transistor (BJT) designed for low-power amplification and switching applications. Manufactured by onsemi, this device is offered in a compact SOT-23 surface-mount package. Although now obsolete, it remains widely referenced in legacy designs.

Download the official datasheet for the MMBT3906 to access detailed electrical characteristics and circuit guidelines:
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Series | SOT-23 |
| Packaging | Tape & Reel (TR), Cut Tape (CT), Digi-Reel® |
| Part Status | Obsolete |
| Transistor Type | PNP |
| Collector Current (Ic) | 200 mA (max) |
| Collector-Emitter Breakdown Voltage (Vce) | 40 V |
| Vce Saturation | 300mV @ 5mA, 50mA |
| Cutoff Current (ICBO) | 100 nA |
| DC Gain (hFE) | 100 @ 10mA, 1V |
| Power Dissipation | 200 mW |
| Transition Frequency | 300 MHz |
| Operating Temperature | -55°C ~ 150°C |
| Mounting Type | Surface Mount |
| Package | TO-236-3 (SOT-23-3) |
| Supplier Package | SOT-23-3 |
Looking for MMBT3906 or equivalent parts? Contact Onzuu, your trusted electronic component distributor. We offer sourcing, BOM services, and global delivery.
Onzuu is a reliable B2B electronic components distributor offering competitive pricing, fast global shipping, and comprehensive BOM services. We specialize in hard-to-find and obsolete parts like the MMBT3906.
The MMBT3906 remains a reference transistor for general-purpose applications in legacy and compact designs. With low power dissipation, reasonable switching performance, and wide availability through distributors like Onzuu, it’s a practical choice where PNP SMD transistors are required.
| Operating Temperature | 150°C (TJ) | |
| Frequency - Transition | 250MHz | |
| Current - Collector (Ic) (Max) | 200 mA | |
| Vce Saturation (Max) @ Ib, Ic | 400mV @ 5mA, 50mA | |
| ECCN | EAR99 | |
| Mounting Type | Surface Mount | |
| Product Status | Obsolete | |
| Voltage - Collector Emitter Breakdown (Max) | 40 V | |
| Supplier Device Package | SOT-23-3 | |
| Series | - | |
| Transistor Type | PNP | |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | |
| Power - Max | 350 mW | |
| REACH Status | REACH Unaffected | |
| Mfr | STMicroelectronics | |
| Current - Collector Cutoff (Max) | - | |
| HTSUS | 8541.21.0075 | |
| Package | Tape & Reel (TR) | |
| RoHS Status | ROHS3 Compliant | |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 100 @ 10mA, 1V | |
| Base Product Number | MMBT | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
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