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

Nexperia USA Inc. PMST3906,135

Name: PMST3906,135
Brand: Nexperia USA Inc.
SKU: PMST3906,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMST3906,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: PMST3906,135.pdf

Description:: TRANS PNP 40V 0.2A SOT-323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PMST3906,135 from Nexperia is a PNP bipolar junction transistor optimized for low-power switching and amplification in space-constrained designs, featuring -40 V V_CEO, -200 mA I_C, DC current gain (h_FE) of 100–300 at -10 mA, AEC-Q101 qualification, and housed in an ultra-compact SOT323 (SC-70) package measuring 2.0 × 1.25 × 0.95 mm - widely deployed in automotive body electronics and portable power management circuits.

For engineers reviewing the PMST3906,135 datasheet, PMST3906,135 pinout, PMST3906,135 application, or PMST3906,135 equivalent, key selection criteria include verified PNP switching performance under pulsed conditions (t_p ≤ 300 µs), guaranteed V_CE(sat) ≤ -400 mV at -50 mA/-5 mA drive, thermal resistance R_th(j-a) = 625 K/W on FR4, and automotive-grade reliability per AEC-Q101.

Technical Context

This discrete PNP transistor operates with open-base V_CEO = -40 V and open-emitter V_CBO = -40 V, supporting robust blocking in high-side switch configurations. Its h_FE remains stable across -55 °C to +150 °C ambient, with typical values of 100–300 at -10 mA and dropping to ≥30 at -100 mA - enabling predictable gain-controlled biasing in analog front-ends.

Switching behavior is characterized by t_on = 70 ns and t_off = 300 ns under defined test conditions (I_Bon = -1 mA, I_Boff = 1 mA), while V_BE(sat) reaches -950 mV at -50 mA/-5 mA, confirming strong base drive capability for fast saturation in digital logic interfacing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-40 V - Maximum collector-emitter voltage before breakdown in open-base configuration; defines safe operating range in high-side load switches.
I_C	-200 mA - Continuous collector current rating; supports moderate-current switching in LED drivers and sensor interface stages.
h_FE	100–300 - DC current gain at V_CE = -1 V, I_C = -10 mA, pulsed; enables precise base resistor sizing for stable bias networks.
V_CE(sat)	≤ -400 mV - Collector-emitter saturation voltage at I_C = -50 mA, I_B = -5 mA; ensures low conduction loss in saturated-switch applications.
R_th(j-a)	625 K/W - Junction-to-ambient thermal resistance on FR4 PCB with single-sided copper; informs derating requirements above 25 °C ambient.
f_T	250 MHz - Transition frequency at V_CE = -20 V, I_C = -10 mA; validates suitability for RF preamplifier or high-speed signal conditioning roles.
AEC-Q101	Qualified - Meets stress-test requirements for discrete semiconductors in automotive environments; supports under-hood and infotainment use.

Pinout & Package

SOT323 (SC-70) plastic surface-mount package: 3-terminal, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body height, designed for reflow soldering with standardized footprint per Figure 8.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal accepting negative base current to initiate conduction; requires external current-limiting resistor for safe drive.
2	Emitter (E)	Current source terminal in PNP operation; connected to higher potential rail (e.g., V_CC) in high-side switch topologies.
3	Collector (C)	Output terminal sinking current to load; placed at lower potential (e.g., GND or switched node) during active conduction.

Key Features

Feature	Design Value
Ultra-small footprint	SOT323 package occupies <1.5 mm² PCB area - ideal for wearables, compact ECUs, and multi-channel sensor modules.
Automotive-grade reliability	AEC-Q101 qualification confirms performance across -65 °C to +150 °C storage and operating ranges, including temperature cycling and HTRB.
Pulsed switching capability	t_on/t_off ≤ 70/300 ns under defined test conditions - supports >1 MHz digital signal routing and PWM-driven loads.
Low saturation voltage	V_CE(sat) ≤ -400 mV at -50 mA ensures <20 mW conduction loss - critical for battery-powered systems minimizing heat generation.
High-frequency response	f_T = 250 MHz enables use in IF amplifiers, oscillator buffers, and EMI-filtered signal paths up to ~100 MHz.

Applications

Automotive Door Module

Portable Medical Sensor Interface

Use Scenario: Driving small solenoids and status LEDs in door lock actuators and mirror control units.

IC Role / Device Role / Timing Role: PNP high-side switch controlling 12 V loads with microcontroller GPIO-level base drive.

Use Value: AEC-Q101 qualification ensures long-term reliability in vibration-prone cabin environments; -400 mV V_CE(sat) limits self-heating during repeated actuation cycles.

Use Scenario: Level-shifting and buffering analog signals from low-voltage biosensors to 3.3 V ADC inputs.

IC Role / Device Role / Timing Role: Low-noise PNP emitter-follower providing impedance transformation without inversion.

Use Value: NF = 4 dB at 10 Hz–15.7 kHz enables clean amplification of ECG/PPG waveforms; h_FE stability over temperature maintains gain accuracy.

Industrial PLC Input Stage

Smart Home Motion Detector

Use Scenario: Isolating and conditioning 24 V DC field signals into 5 V logic-compatible levels for microcontroller input.

IC Role / Device Role / Timing Role: Discrete PNP switch converting sink-type industrial inputs to active-high logic signals.

Use Value: -40 V V_CEO withstands common-mode transients on factory floor wiring; 625 K/W R_th(j-a) allows operation without heatsinking at 50 mA continuous.

Use Scenario: Enabling/disabling IR LED arrays and PIR sensor bias rails in battery-operated occupancy sensors.

IC Role / Device Role / Timing Role: Low-quiescent-current PNP switch managing power domains to extend coin-cell life.

Use Value: ICBO ≤ -50 nA minimizes standby leakage; SOT323 footprint reduces board area by >60% vs. SOT23, enabling sub-20 mm² sensor modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-16,215	V_CEO = -45 V, I_C = -500 mA, h_FE = 100–250, SOT23 package (larger footprint, higher I_C)	Higher current handling but larger size; less suitable for ultra-dense layouts where SOT323 is mandated.	Select when >200 mA load current or higher V_CEO margin is required; verify PCB pad compatibility with SOT23.
MMBT3906LT1G	V_CEO = -40 V, I_C = -200 mA, h_FE = 100–300, SOT23 package, no AEC-Q101 qualification	Identical electrical specs but lacks automotive qualification; not approved for under-hood or safety-critical functions.	Acceptable for consumer or industrial non-automotive use; avoid where AEC-Q101 compliance is contractually required.

Compared with BC807-16,215 and MMBT3906LT1G, the PMST3906,135 uniquely combines AEC-Q101 qualification, SOT323 miniaturization, and verified -400 mV V_CE(sat) - making it the preferred choice for space-limited automotive subsystems requiring zero-defect reliability.

Availability

PMST3906,135 is available at Aetrix Electronics and suitable for automotive body electronics, portable medical instrumentation, industrial PLC input conditioning, and smart home motion detection systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PMST3906,135 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

The PMST3906,135 belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust, miniaturized switching and amplification in harsh-environment automotive and industrial control applications.

FAQ

Is PMST3906,135 pin-compatible with the NPN PMST3904?

No - PMST3906,135 is a PNP transistor with pinout Base–Emitter–Collector (1–2–3), while PMST3904 is its NPN complement with identical SOT323 package but reversed polarity and complementary pin function mapping. Direct substitution requires circuit topology revision, including supply rail and signal polarity adjustments.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is -100 mA per limiting values table, but for continuous DC operation, IBM must be limited to ensure junction temperature stays within 150 °C. At Tamb = 25 °C, with P_tot = 200 mW and typical V_BE(sat) ≈ -950 mV, continuous I_B should not exceed -10 mA to maintain safe thermal margin on standard FR4.

Does PMST3906,135 support pulse-width modulation (PWM) drive?

Yes - the device is characterized for pulsed operation (t_p ≤ 300 µs, duty cycle δ ≤ 0.02) in h_FE and V_CE(sat) tests, and switching times (t_on = 70 ns, t_off = 300 ns) confirm suitability for PWM frequencies up to 1–2 MHz in low-duty-cycle applications such as LED dimming or gate driving.

Can PMST3906,135 be used in linear amplifier configurations?

Yes - its h_FE stability across -55 °C to +150 °C and low noise figure (NF = 4 dB) support Class-A and emitter-follower linear amplification. However, thermal derating is essential: at Tamb = 85 °C, P_tot must be reduced to ~100 mW, limiting usable I_C to approximately -60 mA for sustained analog operation.

PMST3906,135 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-70, SOT-323

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:: 200 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

PMST3906,135 FAQ

1.How can I place an order for PMST3906,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMST3906,135 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 PMST3906,135 reliable?

The price and inventory of PMST3906,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMST3906,135 is usually 5 days.

3.What payment methods are accepted for PMST3906,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMST3906,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMST3906,135?

PMST3906,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMST3906,135 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 PMST3906,135?

For technical support, including PMST3906,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMST3906,135 requirements.

6.How does Aetrix verify that PMST3906,135 is sourced from the original manufacturer or authorized distributors?

All PMST3906,135 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 PMST3906,135 meets industry standards.

7.What is the process for return or replacement of PMST3906,135?

All PMST3906,135 units undergo pre-shipment inspection (PSI). If there is an issue with PMST3906,135, 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 PMST3906,135 part is unused and in its original packaging.

Return procedure for PMST3906,135:

1.Submit a request within 90 days.

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

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