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

Nexperia USA Inc. PMBTA42,235

Name: PMBTA42,235
Brand: Nexperia USA Inc.
SKU: PMBTA42,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBTA42,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: PMBTA42,235.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PMBTA42,235 from Nexperia is an NPN high-voltage transistor in SOT23 package, rated for 300 V V_CEO, 100 mA I_C, and AEC-Q101 qualified for automotive use. It functions as a switching or amplification device in high-voltage biasing, line interface, and relay driver circuits within telephony and professional communication equipment.

For engineers reviewing the PMBTA42,235 datasheet, PMBTA42,235 pinout, PMBTA42,235 application, or PMBTA42,235 equivalent, key selection criteria include its 300 V collector-emitter breakdown voltage, 250 mW power dissipation at T_amb ≤ 25 °C, DC current gain (h_FE) ≥ 40 at I_C = 30 mA, and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

The PMBTA42,235 is a silicon NPN bipolar junction transistor optimized for high-voltage linear and switching operation. Its structure supports stable DC current gain across I_C = 1–30 mA and maintains low V_CEsat ≤ 500 mV at I_C = 20 mA / I_B = 2 mA, enabling efficient saturation in low-power control stages.

Thermal performance is defined for FR4 PCB mounting with single-sided copper: R_th(j-a) = 500 K/W and maximum junction temperature of 150 °C. The device meets AEC-Q101 stress test requirements, confirming robustness under automotive thermal cycling, humidity, and mechanical shock conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 V - Enables safe operation in 200 V DC bias rails with 50% safety margin
I_C	100 mA - Supports load switching up to ~1 W at 10 V, suitable for LED drivers and small solenoids
h_FE	≥40 at I_C = 30 mA - Ensures reliable base drive efficiency with minimal current sourcing overhead
V_CEsat	≤500 mV - Reduces conduction loss and self-heating in saturated switch mode
P_tot	250 mW at T_amb ≤ 25 °C - Defines maximum continuous power on standard FR4 PCB without heatsinking
f_T	50 MHz - Supports signal amplification up to audio band and low-speed digital edge shaping

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, tin-plated leads, compatible with reflow and wave soldering per IPC-7095.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input requiring ~2 mA drive for full saturation at 20 mA collector load
2	Emiter (E)	Common reference node; tied to ground or negative rail in low-side switch configuration
3	Collector (C)	High-voltage output node; handles up to 300 V transient spikes in telecom line interfaces

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing
300 V V_CEO rating	Supports direct interface with legacy telephone line voltages (e.g., -48 V nominal with ringing transients)
SOT23 footprint	Enables automated placement and high-density routing on compact PCBs without lead-forming
Low V_BEsat	≤900 mV at I_C = 20 mA / I_B = 2 mA - simplifies logic-level base drive from 3.3 V or 5 V microcontrollers

Applications

Telecom Line Interface

Automotive Sensor Biasing

Use Scenario: Isolating and conditioning analog signals on POTS telephone lines with ±170 V ringing transients.

IC Role / Device Role / Timing Role: High-voltage NPN switch controlling AC-coupled signal path and protecting downstream circuitry.

Use Value: Withstands 300 V V_CEO, limits leakage to ≤100 nA at 200 V, and provides clean turn-on/turn-off for line supervision.

Use Scenario: Providing stable bias current to Hall-effect or thermistor-based sensors in engine control modules.

IC Role / Device Role / Timing Role: Precision current source configured in emitter-follower mode with feedback stabilization.

Use Value: h_FE ≥ 40 ensures predictable current mirroring; AEC-Q101 qualification guarantees operation over –40 °C to +125 °C ambient.

Industrial Relay Driver

LED Signage Power Switch

Use Scenario: Driving 24 V DC coil relays in programmable logic controllers with opto-isolated inputs.

IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to inductive load via flyback diode protection.

Use Value: 250 mW P_tot and 500 mV V_CEsat minimize thermal rise during sustained 100 mA coil activation.

Use Scenario: Sequencing high-brightness LED strings in outdoor signage using PWM-controlled constant-current sinks.

IC Role / Device Role / Timing Role: Saturated switch regulating current through external sense resistor in series with LED chain.

Use Value: Fast f_T = 50 MHz enables clean PWM edges up to 10 kHz; SOT23 allows dense array layout behind display panels.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC817-40,215	V_CEO = 45 V, h_FE = 250–630, P_tot = 300 mW	Lower voltage rating; suited for 5–24 V logic-level switching only	Select when higher h_FE and lower V_CEsat are prioritized over HV capability
PMBTA44,235	V_CEO = 400 V, same SOT23 package and pinout, h_FE ≥ 40	Higher breakdown margin for 277 V AC-derived rails or surge-prone industrial environments	Drop-in upgrade where >300 V headroom is required without layout change

Compared with BC817-40,215 and PMBTA44,235, the PMBTA42,235 uniquely balances 300 V capability, AEC-Q101 compliance, and SOT23 scalability-making it optimal for cost-sensitive, space-constrained telecom and automotive auxiliary circuits where 300 V is the design ceiling.

Availability

PMBTA42,235 is available at Aetrix Electronics and suitable for telephony infrastructure, automotive sensor modules, industrial relay drivers, and LED signage systems requiring stable component supply and long-term lifecycle support.

Supply support for PMBTA42,235 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 PMBTA42,235 belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for robust operation in telecom line interfaces, automotive subsystems, and industrial control where voltage resilience and AEC-Q101 reliability are mandatory.

FAQ

Is PMBTA42,235 suitable for automotive applications?

Yes. The PMBTA42,235 is AEC-Q101 qualified, tested for temperature cycling, high-temperature reverse bias, and electrostatic discharge per automotive stress standards. It operates reliably from –65 °C to +150 °C junction temperature and is approved for use in engine control, body electronics, and infotainment subsystems.

What is the maximum continuous collector current at 85 °C ambient?

At T_amb = 85 °C, derating applies: P_tot drops linearly from 250 mW at 25 °C to zero at 150 °C. Using R_th(j-a) = 500 K/W, maximum I_C is ~63 mA at V_CE = 10 V to maintain T_j ≤ 150 °C. Full 100 mA rating applies only at T_amb ≤ 25 °C.

Does PMBTA42,235 have a complementary PNP device?

Yes. The PMBTA92,235 is the designated PNP complement, sharing identical SOT23 package, pinout (1: Emitter, 2: Base, 3: Collector), voltage ratings (300 V V_CEO), and AEC-Q101 qualification. Both are designed for matched pair use in push-pull or differential amplifier configurations.

Can PMBTA42,235 be used in linear amplifier mode?

Yes, but with constraints. Its f_T = 50 MHz and h_FE stability support low-frequency linear amplification (e.g., <1 MHz). However, thermal resistance (500 K/W) and limited P_tot restrict usable quiescent power; bias networks must ensure T_j stays below 150 °C under worst-case signal swing and ambient conditions.

PMBTA42,235 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

PMBTA42,235 FAQ

1.How can I place an order for PMBTA42,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBTA42,235 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 PMBTA42,235 reliable?

The price and inventory of PMBTA42,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBTA42,235 is usually 5 days.

3.What payment methods are accepted for PMBTA42,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBTA42,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBTA42,235?

PMBTA42,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBTA42,235 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 PMBTA42,235?

For technical support, including PMBTA42,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBTA42,235 requirements.

6.How does Aetrix verify that PMBTA42,235 is sourced from the original manufacturer or authorized distributors?

All PMBTA42,235 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 PMBTA42,235 meets industry standards.

7.What is the process for return or replacement of PMBTA42,235?

All PMBTA42,235 units undergo pre-shipment inspection (PSI). If there is an issue with PMBTA42,235, 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 PMBTA42,235 part is unused and in its original packaging.

Return procedure for PMBTA42,235:

1.Submit a request within 90 days.

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

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