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

Infineon Technologies BCX71JE6433HTMA1

Name: BCX71JE6433HTMA1
Brand: Infineon Technologies
SKU: BCX71JE6433HTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX71JE6433HTMA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCX71JE6433HTMA1.pdf

Description:: TRANS PNP 45V 0.1A PG-SOT23

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Product details

Overview

BCX71JE6433HTMA1 from Infineon Technologies is a PNP silicon small-signal transistor in SOT-23 package, rated for V_CEO = 45 V, I_C = 100 mA, and P_tot = 330 mW at T_S ≤ 71 °C. It delivers h_FE = 250–500 (at I_C = 10 µA, V_CE = 5 V), V_CE(sat) ≤ 0.25 V (I_C = 10 mA, I_B = 0.25 mA), and low noise (F = 2 dB @ I_C = 200 µA, f = 1 kHz), suited for audio-frequency input stages and driver circuits in automotive and industrial control modules.

For engineers reviewing the BCX71JE6433HTMA1 datasheet, BCX71JE6433HTMA1 pinout, BCX71JE6433HTMA1 application, or BCX71JE6433HTMA1 equivalent, key selection criteria include guaranteed h_FE group J performance, low V_CE(sat) under medium drive, thermal resistance R_thJS ≤ 240 K/W, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PNP transistor operates in linear amplification and switching modes with verified DC current gain spanning 250–500 across h_FE group J at low collector currents (10 µA–2 mA) and sustaining ≥170 at I_C = 50 mA, V_CE = 1 V. Its low-noise design (2 dB NF @ 1 kHz) and stable h-parameters (h_21e = 330–520, h_22e = 30–50 µS) support high-fidelity analog signal conditioning.

The device features complementary NPN pairing with BCX70 series, supports pulsed operation up to I_CM = 200 mA (t_p ≤ 10 ms), and maintains V_(BR)CEO = 45 V and V_(BR)CBO = 45 V with I_CBO ≤ 20 µA at 150 °C - enabling robust biasing in temperature-varying sensor interface and power management circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	100 mA - continuous DC collector current rating defining linear/saturation operating envelope
h_FE (I_C = 10 µA)	250–500 - guaranteed DC current gain range for low-current bias networks and preamplifier stages
V_CE(sat)	≤ 0.25 V @ I_C = 10 mA, I_B = 0.25 mA - enables efficient switching with minimal conduction loss
f_T	250 MHz - transition frequency confirming usable bandwidth up to mid-VHF for RF-coupled AF drivers
R_thJS	≤ 240 K/W - junction-to-soldering-point thermal resistance supporting thermal design on standard PCB copper
F (Noise Figure)	2 dB @ I_C = 200 µA, f = 1 kHz - quantifies low-noise capability critical for microphone preamps and sensor front-ends

Pinout & Package

BCX71JE6433HTMA1 is housed in a RoHS-compliant SOT-23 plastic surface-mount package with standardized pin assignment: Pin 1 = Base (B), Pin 2 = Emitter (E), Pin 3 = Collector (C).

Pin/Terminal	Circuit Role	Design Meaning
1 (B)	Base terminal	Controls minority-carrier injection; requires current-limited drive for predictable h_FE-based amplification
2 (E)	Emitter terminal	Common reference node in CE configuration; connects to ground or negative rail in PNP bias schemes
3 (C)	Collector terminal	Output node carrying amplified current; reverse-biased during active operation, forward-biased in saturation

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control sensors and body electronics
Low V_CE(sat)	≤ 0.25 V ensures <1.5 mW dissipation at 10 mA collector load, reducing thermal stress in dense layouts
Group J h_FE binning	250–500 gain range enables consistent bias point setting without post-manufacture trimming
Low-noise operation	2 dB noise figure at 1 kHz supports high-SNR audio preamplification without external filtering
Complementary NPN pairing	Direct match with BCX70 series simplifies push-pull stage design in Class-A/B output drivers

Applications

Automotive Sensor Interface

Audio Input Stage

Use Scenario: Amplifying low-level signals from resistive temperature sensors (RTDs) and Hall-effect position sensors in engine control units.

IC Role / Device Role / Timing Role: PNP common-emitter amplifier providing DC-coupled gain with stable quiescent point over −40 °C to +125 °C.

Use Value: Group J h_FE consistency eliminates calibration drift; V_CEO = 45 V withstands load-dump transients per ISO 7637-2.

Use Scenario: First-stage amplification of electret microphone outputs in infotainment head units and hands-free systems.

IC Role / Device Role / Timing Role: Low-noise, high-input-impedance preamplifier configured in common-collector or common-emitter topology.

Use Value: 2 dB noise figure preserves SNR below 10 kHz; SOT-23 footprint enables compact PCB layout near acoustic ports.

Industrial Level Shifter

Power Supply Enable Switch

Use Scenario: Translating logic-level signals between 3.3 V microcontrollers and 12 V/24 V fieldbus transceivers in PLC I/O modules.

IC Role / Device Role / Timing Role: PNP switch operating in saturation mode to invert and level-shift digital control lines.

Use Value: V_CE(sat) ≤ 0.25 V minimizes voltage drop; I_C = 100 mA rating supports driving multiple gate inputs simultaneously.

Use Scenario: Enabling/disabling auxiliary 5 V or 3.3 V LDO rails in battery-powered instrumentation using MCU GPIO.

IC Role / Device Role / Timing Role: High-side switch controlling power path to downstream analog subsystems.

Use Value: Complementary BCX70 pairing allows matched turn-on/turn-off timing; AEC-Q101 qualification ensures reliability in harsh environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCX71K E6327	h_FE = 350–630 (group K), V_CE(sat) ≤ 0.55 V @ I_C = 50 mA - higher gain but higher saturation voltage	Better for high-gain bias networks; less suitable for low-loss switching above 20 mA	Select when circuit demands >400 h_FE at I_C = 2 mA but can tolerate higher V_CE(sat)
BC807-40,215	NXP part, SOT-23, h_FE = 250–630 (group 40), V_CE(sat) ≤ 0.7 V @ I_C = 500 mA - higher current rating but higher saturation loss	Targeted at higher-power switching; not optimized for low-noise AF amplification	Prefer for general-purpose switching where noise and precision gain are secondary to current handling

Compared with BCX71KE6327 and BC807-40,215, BCX71JE6433HTMA1 offers the best balance of low-noise performance (2 dB), tight h_FE binning (250–500), and low V_CE(sat) (≤0.25 V), making it optimal for precision analog front-ends and automotive sensor interfaces requiring stable gain and thermal resilience.

Availability

BCX71JE6433HTMA1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, audio input stages, industrial level shifters, and power supply enable switches requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX71JE6433HTMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

BCX71JE6433HTMA1 belongs to Infineon's BCX7x PNP transistor family, designed specifically for high-reliability analog signal conditioning and switching in automotive and industrial environments where AEC-Q101 qualification and low-noise operation are mandatory.

FAQ

What is the maximum junction temperature for BCX71JE6433HTMA1?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent degradation of h_FE, increased leakage, and bond-wire failure. Derating is required above T_S = 71 °C to maintain P_tot ≤ 330 mW.

Is BCX71JE6433HTMA1 pin-compatible with BCX70 series devices?

No - BCX71JE6433HTMA1 (PNP) and BCX70 series (NPN) share identical SOT-23 pinout (B-E-C), but polarity reversal means direct substitution without circuit redesign is not possible. They are complementary, not pin-compatible replacements.

Does BCX71JE6433HTMA1 require external base resistors in switching applications?

Yes - base current must be limited to prevent excessive I_B and ensure reliable saturation. For I_C = 10 mA with h_FE ≥ 250, minimum I_B ≈ 40 µA; typical drive uses 0.25 mA (per datasheet test condition), requiring ~10 kΩ resistor from 3.3 V logic.

How does the noise figure vary with collector current?

Measured noise figure is 2 dB at I_C = 200 µA and remains ≤ 3 dB up to I_C = 2 mA. Above 2 mA, noise increases due to shot noise dominance; datasheet graphs confirm F rises to ~5 dB at I_C = 10 mA, limiting optimal low-noise use to sub-mA bias conditions.

BCX71JE6433HTMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Transistor Type:: PNP

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

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

Vce Saturation (Max) @ Ib, Ic:: 550mV @ 1.25mA, 50mA

Current - Collector Cutoff (Max):: 20nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 2mA, 5V

Power - Max:: 330 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BCX71JE6433HTMA1 FAQ

1.How can I place an order for BCX71JE6433HTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX71JE6433HTMA1 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 BCX71JE6433HTMA1 reliable?

The price and inventory of BCX71JE6433HTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX71JE6433HTMA1 is usually 5 days.

3.What payment methods are accepted for BCX71JE6433HTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX71JE6433HTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX71JE6433HTMA1?

BCX71JE6433HTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX71JE6433HTMA1 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 BCX71JE6433HTMA1?

For technical support, including BCX71JE6433HTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX71JE6433HTMA1 requirements.

6.How does Aetrix verify that BCX71JE6433HTMA1 is sourced from the original manufacturer or authorized distributors?

All BCX71JE6433HTMA1 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 BCX71JE6433HTMA1 meets industry standards.

7.What is the process for return or replacement of BCX71JE6433HTMA1?

All BCX71JE6433HTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCX71JE6433HTMA1, 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 BCX71JE6433HTMA1 part is unused and in its original packaging.

Return procedure for BCX71JE6433HTMA1:

1.Submit a request within 90 days.

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

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