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Diodes Incorporated MMBT3906LP-7B
- Part No.:
- MMBT3906LP-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- 3-UFDFN
- Datasheet:
-
MMBT3906LP-7B.pdf
- Description:
- TRANS PNP 40V 0.2A X1-DFN1006-3
- Quantity:
- Payment:
- Shipping:
Inventory:69,890
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Product details
Overview
MMBT3906LP-7B from Diodes Incorporated is a PNP small-signal transistor in X1-DFN1006-3 package, rated for -40V VCEO, -200mA IC, and 1000mW power dissipation at enhanced thermal layout. It delivers hFE = 100–300 at IC = -10mA, VCE = -1.0V, and supports fast switching with tf ≤ 75ns. Used in compact load switching, level translation, and bias networks in space-constrained consumer and industrial PCBs.
For engineers reviewing the MMBT3906LP-7B datasheet, MMBT3906LP-7B pinout, MMBT3906LP-7B application, or MMBT3906LP-7B equivalent, key selection criteria include its -40V breakdown rating, 0.5mm profile, NiPdAu terminal finish, complementary pairing with MMBT3904LP, and AEC-Q101 readiness for automotive-grade designs.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with verified DC current gain (hFE) spanning 60–300 across collector currents from -100µA to -100mA. Its low VCE(sat) of -0.25V at IC = -10mA/IB = -1.0mA enables efficient switching in low-voltage logic interfaces.
Thermal performance is defined under two mounting conditions: RθJA = 310°C/W on minimal pad layout and 120°C/W with 25mm × 25mm exposed collector copper-enabling design flexibility for power density vs. thermal margin trade-offs in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40V - Ensures safe operation in 24V and 36V rail systems with margin against transients |
| IC | -200mA - Supports driving LEDs, small relays, or logic-level shifters without external buffering |
| PD | 1000mW - Achievable only with full-exposed-pad thermal layout; 400mW standard PCB limit |
| hFE | 100–300 @ IC = -10mA - Enables predictable base drive sizing for stable saturation in digital switches |
| fT | 300MHz - Sufficient for <10MHz digital signal routing and moderate-speed PWM control |
| VBE(sat) | -0.65 to -0.95V - Low base-emitter drop reduces base drive power loss in high-duty-cycle applications |
| ESD HBM | 4000V - Meets JEDEC Class 3A, supporting robust handling in automated assembly lines |
Pinout & Package
Package: X1-DFN1006-3 - 1.0mm × 0.6mm footprint, 0.5mm height, molded green compound (UL 94V-0), NiPdAu-plated terminals, 0.0008g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | E | Current sink node; connected to higher potential in PNP switch configuration |
| Pin 2 (Base) | B | Control input; requires ~1mA drive for full saturation at 10mA collector load |
| Pin 3 (Collector) | C | Output node tied to load and supply; thermally coupled to exposed pad for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | 0.60mm² area - 13× smaller than SOT-23, enabling dense routing in wearables and IoT nodes |
| Low-profile package | 0.5mm max height - minimizes Z-axis stack-up for thin-profile modules and stacked PCB assemblies |
| Complementary NPN pair | MMBT3904LP - identical X1-DFN1006-3 package and thermal specs, simplifying dual-rail driver layout |
| Automotive-ready construction | AEC-Q101 qualified process - supports PPAP-capable production in IATF 16949 facilities |
| Green material compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets IPC-1752A Tier 2 reporting requirements |
Applications
| LED Driver Circuit | Logic-Level Translator |
|---|---|
Use Scenario: Driving 20mA indicator LEDs from 3.3V microcontroller GPIO pins in battery-powered sensors. IC Role / Device Role / Timing Role: PNP switch sinking current from LED anode to ground, enabling active-low control with voltage inversion. Use Value: VCE(sat) ≤ -0.25V ensures >3.0V forward drop across LED at full brightness, maximizing luminous efficiency. | Use Scenario: Converting 1.8V logic outputs to interface with 5V legacy peripherals in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Level-shifting transistor configured as emitter-follower with pull-up resistor on collector. Use Value: hFE ≥ 100 at low IC guarantees clean transition edges and <10ns propagation delay in bidirectional mode. |
| Load Switch for Sensor Bias | Base Bias Network for Power Amplifier |
Use Scenario: Enabling/disabling analog sensor bias current (e.g., RTD excitation) to reduce standby power in smart meters. IC Role / Device Role / Timing Role: High-side switch controlling current path to sensor bridge, controlled by MCU sleep/wake signal. Use Value: -40V VCEO and -200mA IC allow direct integration into 24V industrial sensor rails without series resistors. | Use Scenario: Providing stable quiescent base current to Class AB audio output stage in portable amplifiers. IC Role / Device Role / Timing Role: Constant-current source using emitter degeneration resistor, stabilized by hFE consistency across temperature. Use Value: hFE variation <±15% from -40°C to +125°C maintains amplifier bias point within ±5% drift. |
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 |
|---|---|---|---|
| DMG1012TQ-7 | Same X1-DFN1006-3 package; VCEO = -20V, IC = -1.2A, MOSFET-based | Lower gate drive requirement but no linear-region control; unsuitable for analog biasing | Select for high-current digital switching where VGS(th) matching and zero gate current matter |
| BC807-25,215 | SOT-23 package; VCEO = -45V, IC = -500mA, hFE = 160–400 | Larger footprint (+13× area), higher thermal resistance (RθJA = 300°C/W unmounted) | Select when board space allows and higher IC headroom or legacy footprint compatibility is required |
Compared with DMG1012TQ-7 and BC807-25,215, the MMBT3906LP-7B uniquely balances ultra-compact size, -40V robustness, and BJT linearity for analog bias and low-power switching-making it optimal for miniaturized, thermally constrained, and mixed-signal designs.
Availability
MMBT3906LP-7B is available at Aetrix Electronics and suitable for LED driver circuits, logic-level translators, sensor bias switches, and amplifier bias networks requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for MMBT3906LP-7B 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBT3906LP belongs to Diodes' LP (Low-Profile) small-signal transistor family, engineered specifically for space-constrained, high-density PCBs in consumer, computing, and automotive electronics where thermal efficiency and footprint reduction are primary design drivers.
FAQ
What is the maximum allowable continuous collector current for MMBT3906LP-7B at 85°C ambient?
At TA = 85°C, derating applies: maximum IC = -200mA × (1 − (85 − 25)/150) = -120mA, based on the 150°C maximum junction temperature and 120°C/W RθJA with full thermal pad. This assumes 25mm × 25mm 2oz copper; on standard FR4, limit to -80mA.
Can MMBT3906LP-7B be used in linear amplifier configurations?
Yes-it supports linear operation with verified hFE stability and VCE(sat) linearity down to IC = -100µA. However, fT = 300MHz and Cobo = 4.5pF limit usable bandwidth to <10MHz; thermal runaway risk requires emitter degeneration resistors above 50mA.
Is the marking "3N" on MMBT3906LP-7B traceable to specific lot or wafer data?
"3N" is the product type code per Diodes' marking standard (DS31836 Rev. 8-2), not a lot identifier. Full traceability-including wafer lot, date code, and assembly site-is provided in the barcoded reel label and Diodes' Certificate of Conformance, available upon request for qualified customers.
Does MMBT3906LP-7B require special reflow profile due to its DFN package?
Yes-X1-DFN1006-3 requires peak reflow temperature ≤ 260°C for ≤ 30 seconds, per J-STD-020 Level 1 moisture sensitivity. Pre-bake is unnecessary, but stencil aperture must match 0.15mm nominal solder paste thickness to avoid bridging between pins 1 and 2.
MMBT3906LP-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-UFDFN
- 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 (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-3
MMBT3906LP-7B FAQ
1.How can I place an order for MMBT3906LP-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBT3906LP-7B 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 MMBT3906LP-7B reliable?
The price and inventory of MMBT3906LP-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT3906LP-7B is usually 5 days.
3.What payment methods are accepted for MMBT3906LP-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT3906LP-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBT3906LP-7B?
MMBT3906LP-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBT3906LP-7B 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 MMBT3906LP-7B?
For technical support, including MMBT3906LP-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT3906LP-7B requirements.
6.How does Aetrix verify that MMBT3906LP-7B is sourced from the original manufacturer or authorized distributors?
All MMBT3906LP-7B 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 MMBT3906LP-7B meets industry standards.
7.What is the process for return or replacement of MMBT3906LP-7B?
All MMBT3906LP-7B units undergo pre-shipment inspection (PSI). If there is an issue with MMBT3906LP-7B, 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 MMBT3906LP-7B part is unused and in its original packaging.
Return procedure for MMBT3906LP-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBT3906LP-7B Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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