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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. PMBT3906MB,315

Name: PMBT3906MB,315
Brand: Nexperia USA Inc.
SKU: PMBT3906MB,315
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBT3906MB,315

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: 3-XFDFN

Datasheet:: PMBT3906MB,315.pdf

Description:: TRANS PNP 40V 0.2A DFN1006B-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PMBT3906MB from Nexperia is a PNP bipolar junction transistor optimized for low-voltage, high-speed switching in space-constrained applications; rated at −40 V V_CEO, −200 mA I_C, with DC current gain (h_FE) of 100–300 at −10 mA collector current and −1 V V_CE; used in mobile power management and signal-level logic inversion.

For engineers reviewing the PMBT3906MB datasheet, PMBT3906MB pinout, PMBT3906MB application, or PMBT3906MB equivalent, key selection criteria include its AEC-Q101 qualification, ultra-small DFN1006B-3 (SOT883B) footprint, low 0.37 mm profile, and verified switching performance (t_on ≤ 70 ns, t_off ≤ 300 ns) under automotive-grade thermal conditions.

Technical Context

This PNP transistor operates as a saturated switch or small-signal amplifier with fixed polarity biasing-base-emitter forward-biased to turn on conduction between emitter and collector. Its design targets fast digital transitions and low quiescent current in battery-powered systems.

Thermal performance is defined for FR4 PCB mounting: R_th(j-a) = 212 K/W with 1 cm² collector pad, enabling reliable operation up to T_j = 150 °C. The device supports reflow-only soldering per JEDEC J-STD-020, with no wave or hand-soldering recommended.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum safe collector-emitter voltage with base open; defines off-state blocking capability in high-side switch configurations.
I_C	−200 mA - Continuous DC collector current rating; sets maximum load drive capacity in linear or saturated operation.
h_FE	100–300 - DC current gain at V_CE = −1 V, I_C = −10 mA; determines required base drive current for target collector load.
V_CE(sat)	−750 mV max at I_C = −10 mA, I_B = −1 mA - Low saturation voltage minimizes power loss and heating during on-state switching.
t_off	≤ 300 ns - Turn-off time with I_Boff = +1 mA, V_CC = −3 V; enables use in >1 MHz digital control signals.
R_th(j-a)	212 K/W - Thermal resistance with 1 cm² copper pad; informs heatsinking requirements for sustained 150 mW dissipation at ambient.

Pinout & Package

Package: DFN1006B-3 (SOT883B), leadless ultra-small plastic SMD package measuring 1.0 mm × 0.6 mm × 0.37 mm, with 0.35 mm pitch and three solder lands. Designed for board-space-critical mobile and wearable electronics.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal; forward-biasing B–E junction (−0.7 V typical) enables PNP conduction path from emitter to collector.
2	Emitter (E)	Current source terminal; connected to higher potential rail in high-side switch topology; carries full load current.
3	Collector (C)	Current sink terminal; routed to load or ground reference; electrically isolated from package thermal pad (no internal connection).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 2 kV); suitable for infotainment and body-control modules.
Ultra-low profile (0.37 mm height)	Enables stacking with thin batteries or placement under displays in smartphones and wearables without mechanical interference.
Board-space reduction	DFN1006B-3 occupies only 0.6 mm² PCB area-60% smaller than SOT23-3-reducing layout congestion in multi-rail PMIC subsystems.
Fast switching (t_on/t_off)	70 ns / 300 ns timing ensures clean edge integrity in 1–2 MHz PWM dimming and enable/disable sequencing for LED drivers.

Applications

Mobile Power Switching

Automotive Signal Inversion

Use Scenario: Enabling/disabling 3.3 V LDO outputs in smartphone application processors based on GPIO control.

IC Role / Device Role / Timing Role: PNP switch configured in high-side mode, driven by active-low enable signal to assert regulated voltage to peripheral ICs.

Use Value: −750 mV V_CE(sat) limits dropout to <1% at 100 mA load, preserving system efficiency while supporting 2 MHz enable toggling.

Use Scenario: Level-shifting and inverting CAN transceiver standby control signals in automotive gateway ECUs.

IC Role / Device Role / Timing Role: Logic inverter stage converting 5 V microcontroller output to −12 V-compatible enable input for analog front-end circuitry.

Use Value: AEC-Q101 qualification and −40 V V_CEO ensure robustness against load-dump transients and long-term reliability in 15-year vehicle lifecycles.

Wearable Sensor Biasing

IoT Edge Node Wake-Up Control

Use Scenario: Providing programmable bias current to MEMS microphone preamplifiers in hearables with dynamic gain adjustment.

IC Role / Device Role / Timing Role: Constant-current source using emitter-degeneration resistor, controlled via PWM-modulated base drive.

Use Value: Tight h_FE spread (100–300) and low I_CBO (≤−50 nA) minimize unit-to-unit gain variation and dark-current drift across temperature.

Use Scenario: Isolating ultra-low-power MCU reset lines from noisy RF module power rails during BLE advertisement bursts.

IC Role / Device Role / Timing Role: High-side isolation switch decoupling reset domain, activated only during RF transmit windows to prevent false resets.

Use Value: 300 ns t_off guarantees sub-microsecond disable timing, eliminating race conditions between RF activation and MCU reset assertion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PMBT3906,315	Same die, but in larger SOT23-3 package (2.9 mm × 1.3 mm); R_th(j-a) = 300 K/W; no AEC-Q101 certification.	Acceptable for non-automotive consumer boards where board area is not constrained and qualification is not required.	Select when legacy footprint compatibility or manual reworkability outweighs size and qualification needs.
BC807-16,215	Higher h_FE (160–230 typ), same −40 V/−200 mA rating, but in SOT23-3; not AEC-Q101 qualified; V_CE(sat) = −700 mV min.	Better suited for linear amplification due to tighter h_FE tolerance, but lacks automotive validation and ultra-small form factor.	Prefer for analog gain stages requiring predictable β, not for space-limited switching nodes requiring AEC compliance.

Compared with PMBT3906MB, PMBT3906,315 trades miniaturization and automotive qualification for easier handling and thermal margin, while BC807-16,215 offers improved gain consistency at the cost of footprint size and automotive suitability-making PMBT3906MB uniquely balanced for next-gen compact, qualified designs.

Availability

PMBT3906MB is available at Aetrix Electronics and suitable for mobile power switching, automotive signal inversion, wearable sensor biasing, and IoT edge node wake-up control requiring stable component supply across high-mix, low-volume production runs.

Supply support for PMBT3906MB 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies-delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

The PMBT3906MB belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for miniaturized, thermally efficient switching in automotive infotainment, body electronics, and portable electronics.

FAQ

Is PMBT3906MB compatible with lead-free reflow soldering processes?

Yes-PMBT3906MB is qualified for lead-free reflow only, per JEDEC J-STD-020. Peak temperature must not exceed 260 °C for ≤30 seconds. Wave and hand soldering are explicitly not recommended due to thermal stress on the ultra-thin DFN1006B-3 package and risk of solder joint voiding.

What is the maximum allowable PCB copper area for thermal relief with PMBT3906MB?

The 212 K/W R_th(j-a) value assumes a 1 cm² copper pad connected to the collector land. Increasing pad area beyond this yields diminishing returns; no specification exists for >2 cm². Thermal simulation is advised if ambient exceeds 85 °C or power dissipation exceeds 120 mW continuously.

Can PMBT3906MB be used in linear amplification mode?

Yes-it supports small-signal amplification with h_FE = 100–300 at I_C = −10 mA and V_CE = −1 V. However, its primary characterization and qualification focus is switching performance; linearity, noise figure (NF = 4 dB), and f_T = 250 MHz are secondary parameters-not optimized for RF or precision analog use.

Does the marking code "0100" correspond directly to PMBT3906MB?

Yes-the binary marking "0100" (hex 0x04) is the official top-side laser mark for PMBT3906MB on DFN1006B-3 packages, per Nexperia's marking standard. It is distinct from PMBT3904MB (NPN complement), which uses "0101". No other Nexperia part shares this exact marking.

PMBT3906MB,315 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 3-XFDFN

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):: 500nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DFN1006B-3

PMBT3906MB,315 FAQ

1.How can I place an order for PMBT3906MB,315 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBT3906MB,315 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 PMBT3906MB,315 reliable?

The price and inventory of PMBT3906MB,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT3906MB,315 is usually 5 days.

3.What payment methods are accepted for PMBT3906MB,315?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT3906MB,315 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBT3906MB,315?

PMBT3906MB,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBT3906MB,315 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 PMBT3906MB,315?

For technical support, including PMBT3906MB,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT3906MB,315 requirements.

6.How does Aetrix verify that PMBT3906MB,315 is sourced from the original manufacturer or authorized distributors?

All PMBT3906MB,315 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 PMBT3906MB,315 meets industry standards.

7.What is the process for return or replacement of PMBT3906MB,315?

All PMBT3906MB,315 units undergo pre-shipment inspection (PSI). If there is an issue with PMBT3906MB,315, 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 PMBT3906MB,315 part is unused and in its original packaging.

Return procedure for PMBT3906MB,315:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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