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Diodes Incorporated MMBT3906Q-7-F
- Part No.:
- MMBT3906Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBT3906Q-7-F.pdf
- Description:
- TRANS PNP 40V 0.2A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,390
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Product details
Overview
MMBT3906Q-7-F from Diodes Incorporated is a 40V PNP small-signal transistor in SOT23 package, rated for -200mA continuous collector current and -40V VCEO, with DC current gain (hFE) of 60–300 at IC = -10mA, used in medium-power switching and amplification circuits in industrial control and power management subsystems.
For engineers reviewing the MMBT3906Q-7-F datasheet, MMBT3906Q-7-F pinout, MMBT3906Q-7-F application, or MMBT3906Q-7-F equivalent, key selection criteria include verified PNP polarity, SOT23 thermal resistance (RθJA = 403°C/W), ESD robustness (HBM 4kV), complementary pairing with MMBT3904, and automotive-grade qualification per AEC-Q101.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with defined breakdown limits: VCBO = -40V, VCEO = -40V, and VEBO = -6.0V. Its hFE varies from 60 at low current (-100µA) to 30 at high current (-100mA), supporting both linear amplification and hard-switching roles.
Switching performance includes td/tr/ts/tf ≤ 35/35/225/75 ns under VCC = -3.0V, IC = -10mA conditions, while fT = 250 MHz ensures RF-capable operation up to low-VHF. Noise figure is 4.0 dB at IC = -100µA, making it suitable for low-noise preamplifier stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40 V - Maximum safe voltage across collector-emitter in common-emitter configuration, defining rail compatibility in negative-rail switching. |
| IC (cont.) | -200 mA - Continuous DC collector current limit; determines load-driving capability in relay drivers or LED sinks. |
| hFE | 60–300 - DC current gain range across IC = -100µA to -100mA; enables predictable base drive sizing in amplifier and switch designs. |
| VCE(sat) | -0.25 V @ IC = -10mA, IB = -1mA - Low saturation voltage minimizes conduction loss in high-efficiency switching applications. |
| fT | 250 MHz - Transition frequency confirms usable bandwidth for audio and low-speed digital signal conditioning. |
| ESD HBM | 4000 V - Human Body Model rating supports robust handling during PCB assembly and field service without added protection circuitry. |
| RθJA | 403 °C/W - Junction-to-ambient thermal resistance on minimal FR4 pad layout; informs derating requirements above 25°C ambient. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 flammability rating, and moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal in PNP operation | Connected to higher potential rail; defines current flow direction and bias polarity in circuit topology. |
| 2 (Base) | Control input for minority-carrier injection | Requires negative-going drive relative to emitter to turn on; base resistor sizing depends on hFE and load current. |
| 3 (Collector) | Current sink terminal | Typically tied to load and ground-return path; voltage swing limited by VCEO and saturation behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die construction | Ensures consistent hFE distribution and stable switching characteristics across temperature and production lots. |
| Complementary pairing with MMBT3904 | Enables direct substitution in push-pull, differential pair, and H-bridge driver topologies without redesign. |
| AEC-Q101 qualified variant (MMBT3906Q) | Validated for automotive underhood applications including body control modules and sensor interface circuits. |
| Halogen- and antimony-free "Green" compound | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm; supports eco-compliant manufacturing. |
Applications
| Industrial Sensor Interface | LED Current Sink Driver |
|---|---|
|
Use Scenario: Amplifying low-level analog signals from thermistors or pressure transducers before ADC sampling. IC Role / Device Role / Timing Role: PNP small-signal amplifier operating in common-emitter configuration with fixed bias network. Use Value: hFE stability over -40°C to +125°C and low noise figure (4.0 dB) preserve signal integrity in precision measurement paths. |
Use Scenario: Driving indicator LEDs in programmable logic controllers with active-low enable logic. IC Role / Device Role / Timing Role: Saturated switch sinking current from LED anode to ground via collector. Use Value: VCE(sat) ≤ -0.25 V at IC = -10mA reduces power dissipation and improves efficiency in high-density panel layouts. |
| Automotive Body Control Module | Power Supply Enable Switch |
|
Use Scenario: Controlling solenoid valves and window motor relays in AEC-Q101-compliant BCM designs. IC Role / Device Role / Timing Role: Medium-power switching element interfacing microcontroller GPIO to inductive loads. Use Value: Automotive-grade qualification (MMBT3906Q), -55°C to +150°C operating range, and 4kV HBM support reliable field operation. |
Use Scenario: Enabling/disabling auxiliary 3.3V or 5V rails in multi-voltage embedded systems using MCU-controlled logic. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS/NMOS gate drive path. Use Value: Fast switching (ts ≤ 225 ns) and tight VBE(sat) tolerance (-0.65 to -0.95 V) ensure precise rail sequencing and minimal dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC807-40,115 (Nexperia) | SOT23 package, VCEO = -45V, hFE = 250–630 at IC = -100mA; higher gain spread and wider VCEO margin. | Preferred in high-gain linear amplifiers but less optimized for fast switching due to longer storage time (ts ≈ 300 ns). | Select when higher hFE consistency at high current is critical; verify layout thermal relief for RθJA = 450°C/W. |
| PN2907A (ON Semiconductor) | TO-92 package, VCEO = -60V, IC = -600mA; larger footprint, higher power rating, and lower fT (100 MHz). | Suitable for through-hole prototyping and legacy designs requiring mechanical robustness over density. | Choose for manual assembly or repair scenarios where SOT23 rework is impractical; confirm board space and thermal mass compatibility. |
Compared with BC807-40 and PN2907A, MMBT3906Q-7-F delivers optimal balance of SOT23 miniaturization, 250 MHz fT, 4kV ESD resilience, and AEC-Q101 readiness-making it preferred for space-constrained, automotive-qualified, and mixed-signal embedded systems.
Availability
MMBT3906Q-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED current sink drivers, and automotive body control modules requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MMBT3906Q-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and consumer markets since 1969.
The MMBT3906Q-7-F belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-effective, high-yield replacement of legacy through-hole PNP devices in surface-mount power management and signal conditioning applications.
FAQ
What is the difference between MMBT3906 and MMBT3906Q?
The MMBT3906Q is the AEC-Q101-qualified automotive version of the MMBT3906, with additional stress testing for temperature cycling, humidity, and mechanical shock. Both share identical electrical specifications and SOT23 packaging, but only MMBT3906Q is certified for under-hood automotive use per JESD47 and AEC standards.
Can MMBT3906Q-7-F replace MMBT3904 in a circuit?
No-it cannot directly replace the NPN MMBT3904 due to opposite polarity, different biasing requirements, and reversed current flow direction. Swapping requires circuit topology revision, including inversion of supply rails and bias networks. They are complementary-not interchangeable-devices.
What is the maximum safe operating temperature for continuous use?
The MMBT3906Q-7-F has an operating junction temperature range of -55°C to +150°C. At ambient temperatures above 25°C, power dissipation must be derated linearly per the datasheet curve: maximum PD drops from 310 mW at 25°C to zero at ~105°C on standard FR4 layout.
Is the SOT23 marking "K3N" unique to this part?
Yes-"K3N" is the specific top-side laser marking for the MMBT3906 series in SOT23. It distinguishes this PNP transistor from other Diodes SOT23 devices (e.g., MMBT3904 uses "1AM") and confirms correct orientation during automated placement and visual inspection.
MMBT3906Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBT3906Q-7-F FAQ
1.How can I place an order for MMBT3906Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBT3906Q-7-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MMBT3906Q-7-F reliable?
The price and inventory of MMBT3906Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT3906Q-7-F is usually 5 days.
3.What payment methods are accepted for MMBT3906Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT3906Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBT3906Q-7-F?
MMBT3906Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBT3906Q-7-F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MMBT3906Q-7-F?
For technical support, including MMBT3906Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT3906Q-7-F requirements.
6.How does Aetrix verify that MMBT3906Q-7-F is sourced from the original manufacturer or authorized distributors?
All MMBT3906Q-7-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBT3906Q-7-F meets industry standards.
7.What is the process for return or replacement of MMBT3906Q-7-F?
All MMBT3906Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBT3906Q-7-F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MMBT3906Q-7-F part is unused and in its original packaging.
Return procedure for MMBT3906Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBT3906Q-7-F Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
onsemi
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Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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