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

Infineon Technologies BCX51H6327XTSA1

Name: BCX51H6327XTSA1
Brand: Infineon Technologies
SKU: BCX51H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX51H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX51H6327XTSA1.pdf

Description:: TRANS PNP 45V 1A PG-SOT89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCX51H6327XTSA1 from Infineon Technologies is a PNP silicon bipolar junction transistor designed for audio-frequency driver and output stages. It features V_CEO = 45 V, I_C = 1 A continuous collector current, V_CE(sat) ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA, h_FE = 63–100 at I_C = 150 mA, and SOT-89 surface-mount package-used in low-voltage linear amplifiers and relay drivers.

For engineers reviewing the BCX51H6327XTSA1 datasheet, BCX51H6327XTSA1 pinout, BCX51H6327XTSA1 application, or BCX51H6327XTSA1 equivalent, key selection criteria include guaranteed V_CEO rating, low saturation voltage under high-current switching, DC gain consistency across I_C = 5–500 mA, thermal resistance (R_thJS ≤ 15 K/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PNP BJT operates in linear and saturated switching modes with fixed-emitter biasing topology. Its complementary NPN counterparts (BCX54–BCX56) enable push-pull stage design, while the SOT-89 thermally enhanced package supports >1 W dissipation at T_S ≤ 120 °C.

Electrical behavior is characterized by tight V_(BR)CEO tolerance (45 V min), low leakage (I_CBO ≤ 0.1 µA at 30 V), and f_T = 125 MHz typical-enabling stable operation up to mid-AF range without parasitic oscillation in properly decoupled layouts.

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	1 A - Continuous DC collector current rating at T_S ≤ 120 °C
V_CE(sat)	≤ 0.5 V @ I_C = 500 mA, I_B = 50 mA - Low conduction loss in saturated switch applications
h_FE	63–100 @ I_C = 150 mA, V_CE = 2 V - Predictable current amplification for bias network design
f_T	125 MHz typ. @ I_C = 50 mA, V_CE = 10 V - Supports stable small-signal amplification up to ~10 MHz practical bandwidth
R_thJS	≤ 15 K/W - Enables 2 W total power dissipation with ≤30 K temperature rise from solder point to junction
AEC-Q101	Qualified - Meets stress-test requirements for automotive electronic components (temperature cycling, HTRB, etc.)

Pinout & Package

SOT-89 package: 3-pin, single-ended surface-mount plastic case with exposed emitter pad for thermal enhancement and mechanical anchoring. Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Receives forward-biased current to turn on PNP conduction; requires current-limiting resistor in series with driving source
2 (Collector)	High-side current sink	Connected to positive supply rail in common-emitter switch; carries full load current when saturated
3 (Emitter)	Reference terminal	Typically tied to system ground or higher potential; provides low-impedance thermal path via exposed metal tab

Key Features

Feature	Design Value
Low V_CE(sat)	Ensures <0.5 V drop at 500 mA, minimizing power loss and heat generation in switching regulators and LED drivers
AEC-Q101 qualification	Validates robustness for automotive body electronics including HVAC actuators and lighting control modules
Complementary NPN pairing	Enables direct replacement with BCX54–BCX56 in push-pull or Class-B amplifier designs without layout change
RoHS-compliant Pb-free finish	Meets EU Directive 2011/65/EU and supports lead-free reflow soldering profiles (peak 260 °C)

Applications

Automotive Door Lock Actuator

Industrial Relay Driver

Use Scenario: Driving 12 V DC solenoid coils in vehicle door latch mechanisms requiring intermittent 800 mA pulses.

IC Role / Device Role / Timing Role: PNP switch sinking current from coil to ground during activation; base driven by microcontroller GPIO through current-limiting resistor.

Use Value: V_CEO = 45 V exceeds 14 V nominal battery + load dump margin; R_thJS ≤ 15 K/W prevents thermal shutdown during repeated 500 ms actuation cycles.

Use Scenario: Controlling 24 V industrial relays with 500 Ω coil impedance in PLC I/O modules.

IC Role / Device Role / Timing Role: High-side switch (emitter-connected to 24 V) enabling ground-referenced logic control of relay coil.

Use Value: h_FE ≥ 63 ensures sufficient drive capability with ≤5 mA base current; SOT-89 footprint allows compact board layout near relay terminals.

Audio Pre-amplifier Stage

DC Motor Speed Control

Use Scenario: Low-noise voltage amplifier in portable audio equipment feeding line-level signals to ADC inputs.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased at I_C = 5 mA with emitter degeneration resistor.

Use Value: f_T = 125 MHz provides >10 MHz bandwidth margin at audio frequencies; low I_CBO (<0.1 µA) minimizes offset drift over temperature.

Use Scenario: PWM-controlled H-bridge half-bridge element for bidirectional 12 V brushed DC motor in medical pumps.

IC Role / Device Role / Timing Role: Complementary PNP switch paired with NPN in totem-pole output stage for low-side current sourcing.

Use Value: V_(BR)CBO = 45 V withstands inductive kickback; fast turn-off due to low minority-carrier lifetime enables clean 20 kHz PWM edge transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCX51-16H6327XTSA1	Same die, but h_FE binned to 100–160 range (vs. 63–100); identical V_CEO, V_CE(sat), and package	Preferred where tighter h_FE tolerance reduces need for feedback trimming in precision current sources	Select when gain consistency across production units is critical and higher h_FE simplifies base drive design
MMBT5087LT1G	Lower I_C rating (150 mA), smaller SOT-23 package, V_CEO = 50 V, h_FE = 85–375 - wider gain spread, no AEC-Q101 qualification	Suitable only for signal-level switching or low-power bias networks-not for 500 mA+ loads	Choose only for space-constrained PCBs with sub-200 mA current demands and non-automotive environments

Compared with BCX51H6327XTSA1, BCX51-16 offers higher and tighter h_FE for improved current-source accuracy, while MMBT5087LT1G sacrifices current capacity and automotive qualification for footprint reduction-making it unsuitable for direct replacement in power-switching roles.

Availability

BCX51H6327XTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial relay interfaces, audio pre-amplifier stages, and DC motor control circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX51H6327XTSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

The BCX51 series belongs to Infineon's general-purpose bipolar transistor product line, engineered for reliable linear amplification and medium-current switching in cost-sensitive, thermally constrained applications across automotive and industrial markets.

FAQ

Is BCX51H6327XTSA1 pin-compatible with BCX51-16H6327XTSA1?

Yes-both share identical SOT-89 package outline, pin 1 (Base), pin 2 (Collector), pin 3 (Emitter) assignment, and mechanical footprint. The only difference is h_FE binning; electrical and thermal characteristics otherwise match exactly, enabling drop-in substitution in existing layouts.

What is the maximum allowable PCB copper area for thermal relief under 2 W dissipation?

With R_thJS ≤ 15 K/W and 2 W dissipation, junction-to-solder-point rise is ≤30 K. To maintain T_j ≤ 150 °C at T_A = 85 °C, use ≥100 mm² of 2-oz copper connected to the emitter pad via ≥3 thermal vias (0.3 mm diameter) to internal ground plane.

Can BCX51H6327XTSA1 be used in avalanche mode?

No-this device is not rated or characterized for controlled avalanche operation. Its V_(BR)CEO = 45 V is a DC breakdown limit; exceeding it risks irreversible junction damage. For inductive load protection, always use external flyback diodes or snubbers.

Does the "H6327" suffix indicate tape-and-reel packaging?

Yes-"H6327" denotes Infineon's standard 1,000-piece tape-and-reel packaging on 180 mm reels, with moisture sensitivity level (MSL) 1 and Pb-free RoHS-compliant finish, ready for automated SMT placement without baking.

BCX51H6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1 A

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

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 150mA, 2V

Power - Max:: 2 W

Frequency - Transition:: 125MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT89

BCX51H6327XTSA1 FAQ

1.How can I place an order for BCX51H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX51H6327XTSA1 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 BCX51H6327XTSA1 reliable?

The price and inventory of BCX51H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX51H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BCX51H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX51H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX51H6327XTSA1?

BCX51H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX51H6327XTSA1 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 BCX51H6327XTSA1?

For technical support, including BCX51H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX51H6327XTSA1 requirements.

6.How does Aetrix verify that BCX51H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BCX51H6327XTSA1 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 BCX51H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BCX51H6327XTSA1?

All BCX51H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCX51H6327XTSA1, 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 BCX51H6327XTSA1 part is unused and in its original packaging.

Return procedure for BCX51H6327XTSA1:

1.Submit a request within 90 days.

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

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