Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. PMBT3904MB,315

Name: PMBT3904MB,315
Brand: Nexperia USA Inc.
SKU: PMBT3904MB,315
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PMBT3904MB,315

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: 3-XFDFN

Datasheet:: PMBT3904MB,315.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,990

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PMBT3904MB from Nexperia is an AEC-Q101-qualified NPN general-purpose switching transistor in a DFN1006B-3 (SOT883B) ultra-small leadless package, rated for 40 V V_CEO, 200 mA I_C, and 100–300 h_FE at I_C = 10 mA. It serves as a compact, low-profile discrete switch in space-constrained mobile and automotive signal-path control circuits.

For engineers reviewing the PMBT3904MB datasheet, PMBT3904MB pinout, PMBT3904MB application, or PMBT3904MB equivalent, key selection criteria include its 0.37 mm package height, AEC-Q101 qualification, 120–300 mV V_CEsat at I_C/I_B = 10, and binary-marked DFN1006B-3 footprint compatibility with high-density PCB layouts.

Technical Context

This NPN transistor operates in active and saturation regions for digital switching and linear amplification, with base-emitter and collector-base junctions rated to 6 V and 60 V respectively. Its DC current gain spans 60–300 across I_C = 0.1–100 mA and temperature range −55 °C to 150 °C.

Switching performance is characterized by t_on ≤ 70 ns and t_off ≤ 250 ns under defined test conditions (V_CC = 3 V, I_Bon = 1 mA, I_Boff = −1 mA), supported by low parasitic capacitances: C_c = 4 pF and C_e = 8 pF at specified bias points.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-voltage switching rails.
I_C	200 mA - Continuous DC collector current rating; sets maximum load drive capability in logic-level interface stages.
h_FE	100–300 - DC current gain at V_CE = 1 V, I_C = 10 mA; determines required base drive current for saturation.
V_CEsat	120–300 mV - Collector-emitter saturation voltage at I_C = 50 mA, I_B = 5 mA; directly impacts conduction loss and thermal rise.
R_th(j-a)	212 K/W - Junction-to-ambient thermal resistance on FR4 PCB with 1 cm² collector pad; enables power dissipation calculation under real mounting conditions.
f_T	300 MHz - Transition frequency at V_CE = 20 V, I_C = 10 mA; indicates usable bandwidth for RF-coupled or high-speed switching applications.

Pinout & Package

Package: DFN1006B-3 (SOT883B), ultra-small leadless plastic package measuring 1.0 mm × 0.6 mm × 0.37 mm with 0.35 mm pitch and transparent top-view marking.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal for forward-biasing the BE junction; requires current-limited drive to achieve target I_C in saturation.
2	Emitter (E)	Current return path; internally connected to substrate in DFN package; must be routed to lowest-impedance ground plane.
3	Collector (C)	Main output terminal; electrically tied to exposed thermal pad in SOT883B; requires ≥1 cm² copper pour for thermal management.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards.
Ultra-low profile (0.37 mm height)	Enables stacking under shields or integration into ultra-thin handheld and wearables without mechanical interference.
Binary top-side marking ("0111")	Enables automated optical inspection (AOI) and traceability without laser etching; pin 1 indicated by orientation mark.
Reflow-only soldering compatibility	Guarantees interconnect integrity only when processed per JEDEC J-STD-020 reflow profile; excludes wave or hand-soldering.

Applications

LED Driver Stage

Automotive Door Module

Use Scenario: Driving discrete indicator LEDs in portable consumer electronics with 3.3 V logic supply.

IC Role / Device Role / Timing Role: Discrete NPN switch controlling LED anode current path; replaces integrated drivers where BOM cost and board area are critical.

Use Value: 120 mV typical V_CEsat minimizes forward voltage drop and preserves margin for LED forward voltage variation across batches and temperatures.

Use Scenario: Controlling window lift motor enable signals in Class A automotive door modules.

IC Role / Device Role / Timing Role: Level-shifting and isolation switch between microcontroller GPIO and motor driver IC input.

Use Value: AEC-Q101 qualification ensures operation over −40 °C to +125 °C ambient, meeting ISO 16750-4 requirements for interior modules.

Smartphone Power Sequencing

IoT Sensor Node Bias Control

Use Scenario: Enabling/disabling analog sensor power rails during sleep/wake cycles in battery-powered smartphones.

IC Role / Device Role / Timing Role: Low-leakage (≤50 nA I_CBO) high-side switch isolating LDO outputs from downstream circuitry.

Use Value: 50 nA collector-base leakage at 30 V ensures <1 µA total quiescent drain during deep sleep, extending battery life beyond 30 days.

Use Scenario: Biasing MEMS microphone reference voltage in ultra-low-power IoT edge nodes.

IC Role / Device Role / Timing Role: Precision current source configured in common-emitter mode with emitter degeneration resistor.

Use Value: Tight h_FE distribution (100–300) and low V_BEsat variation (±50 mV) enable stable 100 µA bias current across temperature without trimming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
PMBT3904,315	Same die, but in SOT23 package (2.9 mm × 1.3 mm × 1.1 mm); higher R_th(j-a) (300 K/W); no AEC-Q101 qualification.	Used in non-automotive industrial controls where board space is less constrained and qualification not required.	Select when legacy SOT23 footprint compatibility or higher power handling (P_tot = 250 mW) outweighs size and qualification needs.
BC846BW,115	Higher h_FE (110–220), same DFN1006B-3 package, but only qualified to standard JEDEC levels (not AEC-Q101); V_CEO = 65 V.	Preferred in telecom line-card biasing where higher voltage margin and tighter gain binning are prioritized over automotive compliance.	Select when V_CEO > 40 V or h_FE consistency at low I_C (<1 mA) is critical, and AEC-Q101 is not mandated.

Compared with PMBT3904,315 and BC846BW,115, the PMBT3904MB uniquely combines AEC-Q101 qualification, 0.37 mm height, and 40 V/200 mA ratings-making it the only option for space-limited automotive modules requiring production-grade reliability without footprint redesign.

Availability

PMBT3904MB is available at Aetrix Electronics and suitable for automotive door modules, smartphone power sequencing, IoT sensor node bias control, and LED driver stages requiring stable component supply across extended temperature ranges and high-volume production.

Supply support for PMBT3904MB 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, delivering high-performance, reliable discrete, logic, and MOSFET components for automotive, industrial, and mobile markets.

The PMBT3904MB belongs to Nexperia's AEC-Q101-qualified small-signal transistor portfolio, engineered specifically for miniaturized, thermally constrained automotive and portable electronics where reliability and footprint reduction are primary design drivers.

FAQ

What is the maximum allowable junction temperature for PMBT3904MB?

The absolute maximum junction temperature (T_j) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation above this value risks permanent parametric shift or catastrophic failure. Derating is required above 25 °C ambient, using the specified R_th(j-a) = 212 K/W on FR4 with 1 cm² collector pad.

Is PMBT3904MB compatible with standard SMT reflow profiles?

Yes-PMBT3904MB is qualified for JEDEC J-STD-020-compliant reflow only. Peak temperature must not exceed 260 °C for ≤30 seconds. Wave soldering, hand soldering, or infrared rework are not recommended and void reliability guarantees per the datasheet.

How is pin 1 identified on the DFN1006B-3 package?

Pin 1 is identified by a binary marking pattern ("0111") and orientation mark on the top surface of the DFN1006B-3 package. The reading direction is indicated by an arrow adjacent to the marking; pin 1 corresponds to the first bit (leftmost "0") when read in that direction, confirmed by the transparent top-view graphic in Figure 1.

Does PMBT3904MB have a built-in ESD protection diode?

No-PMBT3904MB does not integrate ESD protection diodes. Its HBM ESD rating is 8 kV (Class 3A) per AEC-Q101, achieved through process-level robustness, not on-die clamps. External TVS or series resistors are recommended if used in connector-facing or unshielded signal paths.

PMBT3904MB,315 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 3-XFDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 200 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 200mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 500nA (ICBO)

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

Power - Max:: 250 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DFN1006B-3

PMBT3904MB,315 FAQ

1.How can I place an order for PMBT3904MB,315 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBT3904MB,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 PMBT3904MB,315 reliable?

The price and inventory of PMBT3904MB,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT3904MB,315 is usually 5 days.

3.What payment methods are accepted for PMBT3904MB,315?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT3904MB,315 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBT3904MB,315?

PMBT3904MB,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBT3904MB,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 PMBT3904MB,315?

For technical support, including PMBT3904MB,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT3904MB,315 requirements.

6.How does Aetrix verify that PMBT3904MB,315 is sourced from the original manufacturer or authorized distributors?

All PMBT3904MB,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 PMBT3904MB,315 meets industry standards.

7.What is the process for return or replacement of PMBT3904MB,315?

All PMBT3904MB,315 units undergo pre-shipment inspection (PSI). If there is an issue with PMBT3904MB,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 PMBT3904MB,315 part is unused and in its original packaging.

Return procedure for PMBT3904MB,315:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…