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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Nexperia USA Inc. PMBT3904VS,115

Name: PMBT3904VS,115
Brand: Nexperia USA Inc.
SKU: PMBT3904VS,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBT3904VS,115

Manufacturer:: Nexperia USA Inc.

Category:: Bipolar Transistor Arrays

Package:: SOT-563, SOT-666

Datasheet:: PMBT3904VS,115.pdf

Description:: TRANS 2NPN 40V 200MA SOT-666

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Product details

Overview

PMBT3904VS from Nexperia is a dual NPN general-purpose switching transistor in a SOT666 package, rated for 40 V V_CEO, 200 mA I_C, and DC current gain (h_FE) of 100–300 at I_C = 10 mA. It integrates two independent transistors on one die for compact board-level logic-level switching in space-constrained digital control circuits.

For engineers reviewing the PMBT3904VS datasheet, PMBT3904VS pinout, PMBT3904VS application, or PMBT3904VS equivalent, key selection criteria include per-transistor V_CEO/I_C ratings, SOT666 thermal resistance (R_th(j-a) = 347 K/W per device), dual-transistor pin mapping, and saturation voltage (V_CEsat = 120 mV typ. at I_C = 50 mA/I_B = 5 mA).

Technical Context

This dual NPN transistor supports independent biasing and switching of two signal paths within a single ultra-small footprint. Each transistor features matched h_FE (100–300), low V_CEsat (≤300 mV), and fast switching (t_on ≤ 70 ns, t_off ≤ 250 ns) under standard 3 V/1 mA drive conditions.

Thermal design is enabled by its per-device R_th(j-a) of 347 K/W on FR4 PCB and R_th(j-sp) of 100 K/W to solder point - optimized for reflow-only assembly. The SOT666 package (1.6 × 1.2 × 0.55 mm) maintains 0.5 mm lead pitch and defined solder land geometry per Figure 10.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - maximum safe collector-emitter voltage with base open; defines upper rail limit for 3.3 V/5 V logic interface switching.
I_C	200 mA - continuous collector current per transistor; supports driving small relays, LEDs, or logic gates without external heatsinking.
h_FE	100–300 at V_CE = 1 V, I_C = 10 mA - ensures reliable saturation with modest base drive (e.g., 10 µA–100 µA microcontroller GPIO).
V_CEsat	120 mV typical at I_C = 50 mA / I_B = 5 mA - minimizes conduction loss and self-heating in high-duty-cycle switching.
t_off	250 ns max at I_C = 10 mA, V_CC = 3 V - enables clean digital waveform reproduction up to ~1 MHz toggle rates.
R_th(j-a)	347 K/W per device on FR4 - determines junction temperature rise under 240 mW dissipation; requires no thermal pad for typical 100 mW operation.

Pinout & Package

SOT666 is a 6-lead ultra-small flat-lead surface-mount plastic package measuring 1.6 mm × 1.2 mm × 0.55 mm with 0.5 mm pitch. Its low-profile construction and standardized reflow footprint (per Figure 10) support automated placement and high-density routing.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter of TR1	Low-side return path for first transistor; connects directly to ground or load common in emitter-follower or switch configurations.
2	Base of TR1	Signal input for TR1; requires current-limited drive (e.g., series resistor from MCU GPIO) to achieve target I_B.
3	Collector of TR2	High-side output node for second transistor; used as active pull-up or switched supply rail in dual-rail logic interfaces.
4	Emitter of TR2	Return path for TR2; electrically isolated from E1 but shares same package thermal mass.
5	Base of TR2	Independent control input for TR2; enables asynchronous or complementary switching relative to TR1.
6	Collector of TR1	Primary switched output for TR1; commonly drives loads such as LEDs, small solenoids, or level-shifting networks.

Key Features

Feature	Design Value
Dual NPN topology	Two fully independent transistors in one SOT666 footprint - eliminates interposer routing and reduces PCB area by >40% vs. discrete SOT23 pairs.
Ultra-low V_CEsat	120 mV typical at I_C/I_B = 10 - enables efficient 3.3 V logic-level switching with <100 mW conduction loss at 100 mA.
Fast turn-off	t_off ≤ 250 ns - supports clean edge integrity in clock distribution, pulse-width modulation, and digital bus buffering.
Thermally optimized SOT666	R_th(j-sp) = 100 K/W - allows direct thermal coupling to copper pour or inner-layer planes without via arrays.
Reflow-solder compatible	Specified only for reflow process (no wave/hand-solder); footprint matches IPC-7351B SOT666 standard for zero-placement error.

Applications

LED Driver Pair

Logic-Level Signal Switching

Use Scenario: Driving dual-color indicator LEDs (e.g., status + fault) from a single 3.3 V microcontroller with separate anode/cathode control.

IC Role / Device Role: Dual NPN switch providing independent low-side sink paths for red/green LEDs with matched brightness and timing.

Use Value: Eliminates need for two discrete SOT23 transistors and associated passives; reduces BOM count by 3 components and saves 2.5 mm² PCB area.

Use Scenario: Level-shifting and enabling/disabling analog sensor outputs (e.g., thermistor divider, op-amp buffer) in battery-powered IoT nodes.

IC Role / Device Role: TR1 enables sensor power rail; TR2 switches sensor output to ADC input - both controlled by same MCU pin via split-resistor network.

Use Value: Enables full system sleep mode with <1 µA leakage (ICBO ≤ 50 nA per transistor), extending battery life beyond 5 years in low-duty-cycle sensing.

Dual-Rail Digital Interface

Compact Relay/Load Driver

Use Scenario: Isolating and translating between 1.8 V FPGA I/O banks and 3.3 V peripheral buses (e.g., SPI flash, UART transceivers) in portable medical devices.

IC Role / Device Role: TR1 pulls down 3.3 V bus lines; TR2 provides active pull-up using external 3.3 V supply - forming bidirectional level translator.

Use Value: Achieves sub-10 ns propagation delay asymmetry and <100 mV noise margin at 10 MHz data rates without external direction control signals.

Use Scenario: Driving two 12 V/50 mA automotive-grade relays (e.g., HVAC fan control, door lock actuator) from a single 5 V MCU GPIO bank.

IC Role / Device Role: TR1 and TR2 operate as independent grounded-emitter switches with flyback diodes integrated into relay coils.

Use Value: Delivers 200 mA per channel with V_CEsat ≤ 300 mV, limiting relay coil self-heating to <60 °C rise - meets AEC-Q200 Class 3 ambient requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC846BPDW1T1G	Same SOT363 package, but h_FE = 200–450 and V_CEO = 65 V; higher V_CEsat (200 mV min) and lower f_T (100 MHz).	Preferred where higher breakdown margin is needed (e.g., 24 V industrial I/O), but less optimal for 3.3 V logic-level saturation.	Select when V_CEO > 40 V is mandatory and board space permits larger SOT363 footprint (2.1 × 1.25 mm vs. SOT666's 1.6 × 1.2 mm).
EMX18T2R	SOT-563 package, identical pinout (E1-B1-C2-E2-B2-C1), but h_FE = 120–270 and P_tot = 300 mW; slightly higher R_th(j-a) (370 K/W).	Drop-in replacement in legacy designs using SOT-563 footprints; same thermal profile but tighter h_FE binning.	Choose for backward compatibility with existing SOT-563 layouts; not recommended for new designs targeting minimal area.

Compared with BC846BPDW1T1G and EMX18T2R, PMBT3904VS delivers the smallest footprint (SOT666), lowest thermal resistance per device (347 K/W), and best V_CEsat performance at 3.3 V logic drive - making it optimal for ultra-compact, thermally constrained consumer and portable electronics.

Availability

PMBT3904VS is available at Aetrix Electronics and suitable for LED driver pairs, logic-level signal switching, dual-rail digital interfaces, and compact relay/load drivers requiring stable component supply across high-mix production runs.

Supply support for PMBT3904VS 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 consumer markets.

PMBT3904VS belongs to Nexperia's general-purpose bipolar transistor family, engineered specifically for space-constrained digital switching applications where board area, thermal performance, and consistent h_FE matching are critical.

FAQ

What is the maximum operating temperature for PMBT3904VS?

The absolute maximum junction temperature (T_j) is 150 °C, with ambient operating range from −55 °C to +150 °C. Derating begins above 25 °C ambient: total device power dissipation drops linearly from 360 mW at 25 °C to 0 mW at 150 °C, per Figure 1.

Can PMBT3904VS be used in linear amplification applications?

No - it is characterized and qualified exclusively for switching operation. Its h_FE variation across I_C (Figure 3), lack of linearity specifications (e.g., distortion, output impedance), and absence of small-signal AC parameters confirm its design intent as a saturated switch, not an amplifier.

Is the SOT666 package RoHS and REACH compliant?

Yes - PMBT3904VS meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Nexperia confirms compliance via material declarations and third-party testing; full substance reporting is available upon request through Aetrix Electronics.

What is the marking code for PMBT3904VS on the device body?

The top-side marking is "ZC", as specified in Table 4 of the datasheet. This 2-character code uniquely identifies the PMBT3904VS variant within Nexperia's SOT666 transistor portfolio and is laser-etched on the package surface.

PMBT3904VS,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SOT-563, SOT-666

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Transistor Type:: 2 NPN (Dual)

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

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

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

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

Power - Max:: 360mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-666

PMBT3904VS,115 FAQ

1.How can I place an order for PMBT3904VS,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBT3904VS,115 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 PMBT3904VS,115 reliable?

The price and inventory of PMBT3904VS,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT3904VS,115 is usually 5 days.

3.What payment methods are accepted for PMBT3904VS,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT3904VS,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBT3904VS,115?

PMBT3904VS,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBT3904VS,115 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 PMBT3904VS,115?

For technical support, including PMBT3904VS,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT3904VS,115 requirements.

6.How does Aetrix verify that PMBT3904VS,115 is sourced from the original manufacturer or authorized distributors?

All PMBT3904VS,115 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 PMBT3904VS,115 meets industry standards.

7.What is the process for return or replacement of PMBT3904VS,115?

All PMBT3904VS,115 units undergo pre-shipment inspection (PSI). If there is an issue with PMBT3904VS,115, 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 PMBT3904VS,115 part is unused and in its original packaging.

Return procedure for PMBT3904VS,115:

1.Submit a request within 90 days.

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

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