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

Nexperia USA Inc. PMBTA42-QVL

Name: PMBTA42-QVL
Brand: Nexperia USA Inc.
SKU: PMBTA42-QVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBTA42-QVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: PMBTA42-QVL.pdf

Description:: TRANS NPN 300V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

PMBTA42-QVL from Nexperia is a 300 V, 100 mA NPN high-voltage transistor in SOT23 package, designed for switching and amplification in high-voltage signal paths. It delivers DC current gain (h_FE) ≥40 at I_C = 30 mA, V_CE = 10 V, and supports automotive-grade reliability per AEC-Q101. Used in telephony line interface circuits where high breakdown voltage and low leakage are critical.

For engineers reviewing the PMBTA42-QVL datasheet, PMBTA42-QVL pinout, PMBTA42-QVL application, or PMBTA42-QVL equivalent, key selection criteria include V_CEO = 300 V, I_C = 100 mA continuous, h_FE ≥40 at 30 mA, V_CE(sat) ≤ 500 mV, and AEC-Q101 qualification for automotive signal conditioning.

Technical Context

This NPN bipolar junction transistor operates with open-base collector-emitter voltage rating of 300 V and emitter-base voltage limit of 6 V. Its transition frequency f_T is 50 MHz at V_CE = 20 V, I_C = 10 mA, enabling use in medium-speed switching and analog amplification up to ~10 MHz.

Thermal resistance R_th(j-a) is 500 K/W on FR4 PCB with single-sided copper, defining power derating above 25 °C ambient. Collector-base cutoff current I_CBO is ≤100 nA at V_CB = 200 V, supporting stable high-impedance biasing in HV monitoring nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 V - maximum safe collector-emitter voltage with base open; enables direct interface to telecom line voltages up to ±170 V peak.
I_C	100 mA - continuous collector current rating; supports relay drivers and HV logic-level translators.
h_FE	≥40 at I_C = 30 mA - ensures reliable current amplification in linear and active-region biasing schemes.
V_CE(sat)	≤500 mV at I_C = 20 mA, I_B = 2 mA - minimizes conduction loss in saturated-switch applications.
f_T	50 MHz - usable for RF pre-driver stages and broadband analog signal conditioning below 10 MHz.
I_CBO	≤100 nA at V_CB = 200 V - guarantees low leakage in high-impedance HV sensing and protection circuits.

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal for forward-biased junction; requires current-limited drive to ensure h_FE-based gain control.
2	Emitter (E)	Current sink node; connected to ground or low-side reference in common-emitter configurations.
3	Collector (C)	High-voltage output node; rated for 300 V standoff and 100 mA continuous current in switching mode.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive temperature range (−65 °C to +150 °C) and mechanical stress; suitable for under-hood signal conditioning.
V_CEO = 300 V	Enables direct integration into telephone line interface units (LIUs), ring generator circuits, and HV sensor front-ends without external voltage clamping.
V_BE(sat) ≤ 900 mV	Reduces base drive power requirement in high-side switch configurations using resistor-limited bias networks.
R_th(j-a) = 500 K/W	Defines thermal derating slope: P_tot drops to zero at T_amb = 75 °C on standard FR4 PCB.

Applications

Telecom Line Interface

Automotive HV Signal Switching

Use Scenario: Isolating and conditioning analog voice signals on PSTN lines with ±170 V ringing voltage.

IC Role / Device Role / Timing Role: NPN high-voltage switch controlling line feed current and polarity reversal in SLIC-compatible circuits.

Use Value: 300 V V_CEO eliminates need for series Zener clamping; 100 nA I_CBO maintains signal integrity during idle states.

Use Scenario: Driving solenoid valves or fuel injector pre-drivers in engine control modules requiring >200 V transient tolerance.

IC Role / Device Role / Timing Role: High-voltage level-shifting switch translating 3.3/5 V MCU outputs to 24–48 V load domains.

Use Value: AEC-Q101 qualification ensures operation across −40 °C to +125 °C junction; 500 mV V_CE(sat) limits power dissipation during sustained activation.

Industrial Sensor Signal Conditioning

Power Supply Feedback Control

Use Scenario: Amplifying low-current outputs from HV photodiodes or piezoelectric sensors operating at 100–250 V bias.

IC Role / Device Role / Timing Role: Linear-mode NPN amplifier stage providing gain before ADC input, biased in active region.

Use Value: h_FE ≥40 at 30 mA ensures predictable transconductance; 50 MHz f_T supports bandwidths up to 5 MHz for fast transient detection.

Use Scenario: Optocoupler-driven feedback path in isolated flyback or forward converters with >200 V primary-side regulation.

IC Role / Device Role / Timing Role: Current-sinking transistor in secondary-side error amplifier output stage, interfacing with optocoupler LED.

Use Value: 6 V V_EBO allows safe reverse-biasing during converter startup; 100 mA I_C handles typical opto-LED currents without saturation collapse.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX653	V_CEO = 300 V, I_C = 1 A, h_FE = 100–300 - higher current and gain, larger SOT89 package.	Not suitable for space-constrained SOT23 layouts; better for higher-power driver stages.	Select when >100 mA continuous current or tighter h_FE tolerance is required; verify PCB footprint compatibility.
MPSA42	V_CEO = 300 V, I_C = 500 mA, no AEC-Q101 qualification - legacy through-hole TO-92 device.	Lacks automotive qualification and SMT compatibility; used in prototyping or non-automotive industrial gear.	Choose only for cost-sensitive, non-automotive, through-hole designs where reflow assembly is not required.

Compared with ZTX653 and MPSA42, PMBTA42-QVL uniquely combines AEC-Q101 qualification, SOT23 footprint, and 300 V/100 mA rating-making it optimal for automotive telecom interfaces and compact HV signal chains where reliability and size are jointly constrained.

Availability

PMBTA42-QVL is available at Aetrix Electronics and suitable for telecom line interface units, automotive solenoid drivers, industrial sensor signal conditioners, and isolated power supply feedback circuits requiring stable component supply across extended temperature ranges.

Supply support for PMBTA42-QVL 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 PMBTA42-QVL belongs to Nexperia's AEC-Q101-qualified high-voltage transistor family, engineered specifically for robust signal switching and amplification in automotive and industrial systems exposed to elevated voltage transients.

FAQ

Is PMBTA42-QVL pin-compatible with standard SOT23 NPN transistors like BC847?

No. While both use SOT23 packages, PMBTA42-QVL has Base–Emitter–Collector pinout (1–2–3), whereas BC847 follows Emitter–Base–Collector (1–2–3). Incorrect PCB layout will reverse bias the junctions. Always verify pin assignment using Table 2 in the datasheet.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms), but continuous base current must be limited to ensure I_C ≤ 100 mA and junction temperature stays ≤150 °C. At I_C = 30 mA and h_FE = 40, recommended I_B is 0.75 mA - derate further for ambient >70 °C.

Can PMBTA42-QVL be used in avalanche mode?

No. The device is not characterized or rated for controlled avalanche operation. Its 300 V V_CEO rating assumes safe operating area (SOA) compliance with defined voltage/current/time boundaries. Exceeding SOA risks permanent parametric shift or failure.

Does the "-QVL" suffix indicate tape-and-reel packaging?

Yes. The "-QVL" suffix denotes the version supplied in 3,000-piece 8 mm tape-and-reel format per EIA-481 standard, optimized for automated SMT placement. This differs from "-Q" (bulk) or "-QX" (7-inch reel) variants, all sharing identical electrical specifications.

PMBTA42-QVL 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):: 300 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 2mA, 20mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 30mA, 10V

Power - Max:: 250 mW

Frequency - Transition:: 50MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PMBTA42-QVL FAQ

1.How can I place an order for PMBTA42-QVL through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBTA42-QVL 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 PMBTA42-QVL reliable?

The price and inventory of PMBTA42-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBTA42-QVL is usually 5 days.

3.What payment methods are accepted for PMBTA42-QVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBTA42-QVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBTA42-QVL?

PMBTA42-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBTA42-QVL 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 PMBTA42-QVL?

For technical support, including PMBTA42-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBTA42-QVL requirements.

6.How does Aetrix verify that PMBTA42-QVL is sourced from the original manufacturer or authorized distributors?

All PMBTA42-QVL 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 PMBTA42-QVL meets industry standards.

7.What is the process for return or replacement of PMBTA42-QVL?

All PMBTA42-QVL units undergo pre-shipment inspection (PSI). If there is an issue with PMBTA42-QVL, 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 PMBTA42-QVL part is unused and in its original packaging.

Return procedure for PMBTA42-QVL:

1.Submit a request within 90 days.

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

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