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

Nexperia USA Inc. PMBT6429-QR

Name: PMBT6429-QR
Brand: Nexperia USA Inc.
SKU: PMBT6429-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBT6429-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PMBT6429-QR.pdf

Description:: TRANS NPN 45V 0.1A SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:9,060

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Product details

Overview

PMBT6429-QR from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT23 package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 500–1250 at 0.1 mA collector current; used for low-power switching and amplification in automotive signal conditioning circuits.

For engineers reviewing the PMBT6429-QR datasheet, PMBT6429-QR pinout, PMBT6429-QR application, or PMBT6429-QR equivalent, key selection criteria include its automotive qualification, low-leakage performance (ICBO ≤ 10 nA), SOT23 thermal resistance (500 K/W), and guaranteed h_FE range across operating conditions.

Technical Context

This discrete NPN bipolar junction transistor operates as a current-controlled switch or linear amplifier with base-emitter forward voltage (V_BE) of 560–660 mV at I_C = 1 mA and exhibits transition frequency (f_T) from 100 MHz to 700 MHz under V_CE = 5 V, I_C = 1 mA conditions.

Its absolute maximum ratings include 55 V V_CBO, 6 V V_EBO, 200 mA peak collector current (I_CM), and 150 °C maximum junction temperature - all validated per IEC 60134 and qualified to AEC-Q101 for automotive reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-voltage switching stages
I_C	100 mA - Continuous collector current rating; suitable for driving small relays, LEDs, or logic-level interface loads
h_FE	500–1250 - DC current gain at V_CE = 5 V, I_C = 0.1 mA; ensures stable biasing in low-current amplifier configurations
V_CE(sat)	≤ 600 mV at I_C = 100 mA, I_B = 5 mA - Low saturation voltage minimizes power loss in switching applications
f_T	100–700 MHz - Transition frequency confirms usable bandwidth up to VHF range for RF pre-amplifier or oscillator buffer roles
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance on FR4 PCB; informs derating requirements above 25 °C ambient

Pinout & Package

SOT23 plastic surface-mounted package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch) with gull-wing leads and standard footprint per Nexperia's sot023_fr reflow land pattern.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires ≥0.5 mA base drive to saturate at 100 mA collector load
2	Emitter (E)	Reference terminal for bias network; connected to ground or common return in common-emitter configuration
3	Collector (C)	Output current path; handles switched load up to 45 V and dissipates ≤250 mW at T_amb ≤ 25 °C

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use including temperature cycling, HTRB, and ESD testing per stress test standard
Low leakage current	ICBO ≤ 10 nA at V_CB = 30 V ensures minimal standby power loss in battery-critical systems
High h_FE consistency	Guaranteed 500–1250 range at low I_C enables predictable bias design without trimming resistors
Thermal robustness	Rated for operation from −65 °C to +150 °C junction temperature; supports under-hood deployment

Applications

Automotive Door Module Control

Telecom Line Interface Circuit

Use Scenario: Switching window lift motor drivers and mirror position actuators in door control units.

IC Role / Device Role / Timing Role: NPN switch controlling 12 V DC loads via microcontroller GPIO with current gain buffering.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; low V_CE(sat) reduces heat generation in confined module space.

Use Scenario: Amplifying analog voice signals between codec and line driver in VoIP gateways.

IC Role / Device Role / Timing Role: Low-noise small-signal amplifier stage with f_T > 100 MHz supporting full telephony bandwidth.

Use Value: Tight h_FE distribution enables consistent gain matching across dual-channel designs without calibration.

Industrial Sensor Signal Conditioning

Consumer Audio Input Stage

Use Scenario: Buffering and level-shifting output from thermistor or Hall-effect sensors to ADC inputs.

IC Role / Device Role / Timing Role: Emitter-follower configured for impedance transformation and DC-coupled signal translation.

Use Value: Low ICBO (<10 nA) prevents sensor offset drift; wide T_amb range (−65 to +150 °C) accommodates unregulated enclosures.

Use Scenario: Pre-amplifying microphone signals in portable Bluetooth speakers before DSP processing.

IC Role / Device Role / Timing Role: Low-voltage, low-current active load in single-supply amplifier topology.

Use Value: 250 mW P_tot and SOT23 footprint enable compact, cost-effective audio front-end integration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BW	Same SOT323 package; lower V_CEO (45 V vs. 45 V), identical h_FE range, but not AEC-Q101 qualified	Not approved for automotive production; limited to industrial/commercial grade use	Select when AEC-Q101 compliance is unnecessary and board space allows SOT323 footprint
MMBT3904LT1G	Same SOT23 package; higher I_C rating (200 mA), lower h_FE min (100), no automotive qualification	Higher current capability but wider h_FE variation affects bias stability in precision analog stages	Prefer where higher drive strength is needed and thermal margin exceeds 500 K/W requirement

Compared with BC847BW and MMBT3904LT1G, PMBT6429-QR uniquely combines AEC-Q101 qualification, tight h_FE spread, and low leakage in SOT23 - making it the only choice for automotive signal switching where long-term parametric stability is mandatory.

Availability

PMBT6429-QR is available at Aetrix Electronics and suitable for automotive electronics, telecom infrastructure, industrial sensor interfaces, and consumer audio requiring stable component supply across extended temperature ranges and lifecycle commitments.

Supply support for PMBT6429-QR 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PMBT6429-QR belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, designed specifically for robust, low-cost signal switching and amplification in harsh-environment automotive and industrial control systems.

FAQ

Is PMBT6429-QR pin-compatible with standard SOT23 NPN transistors like BC847 or MMBT3904?

Yes - PMBT6429-QR uses standard SOT23 pinout (1=Base, 2=Emitter, 3=Collector), matching BC847 and MMBT3904 footprints and solder patterns. However, its AEC-Q101 qualification, tighter h_FE range, and lower leakage are not replicated by those parts, so functional substitution requires validation of reliability and parametric margins.

What is the maximum allowable power dissipation at 85 °C ambient temperature?

At T_amb = 85 °C, derated power dissipation is 150 mW, calculated using R_th(j-a) = 500 K/W and T_j(max) = 150 °C. This assumes standard FR4 PCB mounting with single-sided copper; forced-air cooling or thermal vias may improve margin.

Does PMBT6429-QR support pulsed operation beyond its 100 mA continuous rating?

Yes - it supports 200 mA peak collector current (I_CM) for pulses ≤1 ms, provided duty cycle remains ≤1% and average power stays within P_tot limits. Pulse operation must respect V_CEO and thermal constraints to avoid secondary breakdown.

Can PMBT6429-QR be used in linear amplifier configurations?

Yes - its specified h_FE, V_BE, and f_T support Class-A and emitter-follower linear operation up to ~100 MHz. For stable bias, use emitter degeneration and ensure V_CE remains ≥1 V to avoid saturation distortion in small-signal applications.

PMBT6429-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 500 @ 10mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 700MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PMBT6429-QR FAQ

1.How can I place an order for PMBT6429-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBT6429-QR 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 PMBT6429-QR reliable?

The price and inventory of PMBT6429-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT6429-QR is usually 5 days.

3.What payment methods are accepted for PMBT6429-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT6429-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBT6429-QR?

PMBT6429-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBT6429-QR 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 PMBT6429-QR?

For technical support, including PMBT6429-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT6429-QR requirements.

6.How does Aetrix verify that PMBT6429-QR is sourced from the original manufacturer or authorized distributors?

All PMBT6429-QR 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 PMBT6429-QR meets industry standards.

7.What is the process for return or replacement of PMBT6429-QR?

All PMBT6429-QR units undergo pre-shipment inspection (PSI). If there is an issue with PMBT6429-QR, 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 PMBT6429-QR part is unused and in its original packaging.

Return procedure for PMBT6429-QR:

1.Submit a request within 90 days.

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

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