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

Nexperia USA Inc. PMBT4403-QR

Name: PMBT4403-QR
Brand: Nexperia USA Inc.
SKU: PMBT4403-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBT4403-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: PMBT4403-QR.pdf

Description:: TRANS PNP 40V 0.6A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PMBT4403-QR from Nexperia is a PNP bipolar junction transistor optimized for automotive-grade switching applications, featuring V_CEO = −40 V, I_C = −600 mA continuous, and AEC-Q101 qualification. It operates as a high-speed, low-saturation-voltage switch in power control stages of body electronics, lighting drivers, and load management circuits.

For engineers reviewing the PMBT4403-QR datasheet, PMBT4403-QR pinout, PMBT4403-QR application, or PMBT4403-QR equivalent, key selection criteria include guaranteed h_FE (100–300 at −150 mA), fast switching (t_on ≤ 40 ns, t_off ≤ 350 ns), and thermal robustness up to T_j = 150 °C on FR4 PCBs.

Technical Context

This PNP transistor uses epitaxial planar technology with a base-emitter junction designed for stable DC current gain across −55 °C to +150 °C ambient. Its breakdown voltages-V_(BR)CEO = −40 V, V_(BR)CBO = −40 V, and V_(BR)EBO = −5 V-define safe operating limits under open-base, open-emitter, and open-collector conditions respectively.

Switching performance is characterized by low V_CEsat (−750 mV max at I_C = −500 mA / I_B = −50 mA) and controlled charge storage (t_s ≤ 300 ns), enabling efficient operation in PWM-driven 12 V automotive loads such as solenoids and LED arrays.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines maximum supply rail compatibility in 12 V/24 V automotive systems.
I_C	−600 mA - Continuous collector current rating; supports driving medium-power loads like relays and small motors without forced cooling.
h_FE	100–300 - DC current gain at V_CE = −2 V, I_C = −150 mA; ensures reliable base drive sizing for saturation across temperature.
V_CEsat	−750 mV max - Collector-emitter saturation voltage at I_C = −500 mA / I_B = −50 mA; minimizes conduction loss and self-heating in switching mode.
f_T	200 MHz - Transition frequency at V_CE = −10 V, I_C = −20 mA; confirms suitability for high-speed digital switching up to ~10 MHz edge rates.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance on standard FR4 PCB; enables thermal design with ≤250 mW dissipation at 25 °C ambient.

Pinout & Package

Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive reliability.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires −15 mA typical base drive to saturate at −150 mA collector current.
2	Emitter (E)	Common reference terminal for PNP topology; connected to higher-potential rail (e.g., battery +12 V) in high-side switch configurations.
3	Collector (C)	Output current path; sinks load current to ground when transistor is active; rated for −600 mA continuous operation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Stress-tested for automotive temperature cycling (−40 °C to +125 °C), humidity, and mechanical shock-enables use in engine bay and cabin modules without derating.
Low V_CEsat	−750 mV max at high current ensures <1.1 W conduction loss at −500 mA, reducing thermal load in space-constrained PCB layouts.
Fast switching	t_on ≤ 40 ns and t_off ≤ 350 ns support PWM frequencies >100 kHz, minimizing audible noise in LED dimming and solenoid control.
High f_T	200 MHz transition frequency confirms sufficient gain-bandwidth for stable feedback in linear amplifier configurations (e.g., sensor signal conditioning).

Applications

Automotive Body Control Module (BCM)

LED Headlamp Dimming Circuit

Use Scenario: Switching 12 V incandescent or resistive loads (e.g., door lock actuators, window lift motors) under microcontroller GPIO control.

IC Role / Device Role / Timing Role: High-side PNP switch providing galvanic isolation between MCU logic and battery-referenced load.

Use Value: −40 V V_CEO withstands load-dump transients; −750 mV V_CEsat limits power loss to <0.4 W at 500 mA, eliminating need for heatsinking.

Use Scenario: PWM-controlled current sink for high-brightness white LEDs in adaptive front-lighting systems (AFS).

IC Role / Device Role / Timing Role: Fast-switching PNP current switch synchronizing with MCU PWM output to regulate LED brightness.

Use Value: 350 ns t_off enables clean 1–10 kHz dimming without trailing-edge distortion; AEC-Q101 qualification ensures 15-year field reliability.

Engine Control Unit (ECU) Sensor Interface

Industrial PLC Output Stage

Use Scenario: Linear amplification of low-level analog signals from NTC temperature sensors or pressure transducers in engine coolant circuits.

IC Role / Device Role / Timing Role: PNP emitter-follower buffer isolating sensitive sensor outputs from noisy ECU power domains.

Use Value: h_FE ≥ 100 over −40 °C to +150 °C maintains signal fidelity; low C_c (8.5 pF) preserves bandwidth beyond 1 MHz.

Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in factory automation control cabinets.

IC Role / Device Role / Timing Role: Robust discrete switch interfacing programmable logic controller (PLC) outputs to industrial loads.

Use Value: −600 mA I_C rating handles 200–500 mA solenoid hold currents; R_th(j-a) = 500 K/W allows operation at 70 °C ambient without airflow.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-40-Q	Same SOT23 package, identical V_CEO (−45 V) and I_C (−500 mA), but h_FE min = 250 (vs. 100 for PMBT4403-QR); lower f_T (100 MHz).	Preferred where tighter h_FE tolerance is needed for consistent base drive; less suitable for >5 MHz switching due to reduced bandwidth.	Select BC807-40-Q if gain consistency at low I_C (<50 mA) is critical; avoid for high-frequency PWM above 2 MHz.
MMBT4403	Non-automotive grade; same electrical specs but no AEC-Q101 qualification; higher R_th(j-a) (625 K/W) and narrower temp range (−65 °C to +150 °C).	Acceptable for commercial/industrial use only; not approved for automotive safety-critical or long-life deployments.	Choose MMBT4403 only for cost-sensitive non-automotive designs where qualification and extended temperature margin are not required.

Compared with BC807-40-Q and MMBT4403, the PMBT4403-QR uniquely balances AEC-Q101 compliance, −600 mA current capability, and 200 MHz f_T, making it optimal for automotive PWM switching where both reliability and speed are mandatory.

Availability

PMBT4403-QR is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting drivers, engine sensor interfaces, and industrial PLC output stages requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for PMBT4403-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 essential efficiency technologies, delivering high-performance, high-reliability discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The PMBT4403-QR belongs to Nexperia's AEC-Q101-qualified PNP transistor portfolio, engineered specifically for robust, low-loss switching in 12 V/24 V automotive subsystems where thermal stability and transient immunity are critical.

FAQ

Is PMBT4403-QR pin-compatible with standard SOT23 PNP transistors like BC807 or MMBT4403?

Yes-PMBT4403-QR uses standard SOT23 pinning: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This matches BC807 series and MMBT4403 footprints exactly, enabling drop-in replacement on existing PCBs without layout changes.

What is the maximum allowable peak collector current for PMBT4403-QR in pulsed operation?

The absolute maximum peak collector current (I_CM) is −800 mA, specified for single pulses with duration ≤1 ms and duty cycle ≤1%. This supports short-duration inrush current handling in relay or solenoid drive applications.

Does PMBT4403-QR require external base resistor protection when driven directly from a 3.3 V MCU GPIO?

Yes-a series base resistor is mandatory. With V_BEsat ≈ −1.3 V at I_B = −50 mA, a 3.3 V GPIO must limit base current to ≤20 mA using a minimum 100 Ω resistor to avoid exceeding I_BM = −200 mA peak rating and ensure reliable saturation.

How does the thermal performance of PMBT4403-QR compare on FR4 versus metal-core PCBs?

Rated R_th(j-a) = 500 K/W assumes standard FR4 with single-sided 1 oz copper and tin-plated pads. On 2-layer FR4 with thermal vias to inner ground planes, R_th(j-a) improves to ~350 K/W; metal-core boards can achieve <150 K/W, enabling >400 mW continuous dissipation.

PMBT4403-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:: PNP

Current - Collector (Ic) (Max):: 600 mA

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

Vce Saturation (Max) @ Ib, Ic:: 750mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 250 mW

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PMBT4403-QR FAQ

1.How can I place an order for PMBT4403-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBT4403-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 PMBT4403-QR reliable?

The price and inventory of PMBT4403-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT4403-QR is usually 5 days.

3.What payment methods are accepted for PMBT4403-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT4403-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBT4403-QR?

PMBT4403-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBT4403-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 PMBT4403-QR?

For technical support, including PMBT4403-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT4403-QR requirements.

6.How does Aetrix verify that PMBT4403-QR is sourced from the original manufacturer or authorized distributors?

All PMBT4403-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 PMBT4403-QR meets industry standards.

7.What is the process for return or replacement of PMBT4403-QR?

All PMBT4403-QR units undergo pre-shipment inspection (PSI). If there is an issue with PMBT4403-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 PMBT4403-QR part is unused and in its original packaging.

Return procedure for PMBT4403-QR:

1.Submit a request within 90 days.

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

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