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

Infineon Technologies BCX54E6327

Name: BCX54E6327
Brand: Infineon Technologies
SKU: BCX54E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX54E6327

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: BCX54E6327.pdf

Description:: SMALL SIGNAL BIPOLAR TRANSISTOR

Quantity:: RFQ Add To RFQ list

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Inventory:85,000

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Product details

Overview

BCX54E6327 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for audio-frequency driver and output stages, featuring 45 V V_CEO, 1.5 A DC collector current, 1 W total power dissipation at T_S = 130 °C, 100 MHz transition frequency, and low 0.5 V V_CE(sat) at I_C = 500 mA / I_B = 50 mA - used in compact linear amplifier outputs and switching regulators.

For engineers reviewing the BCX54E6327 datasheet, BCX54E6327 pinout, BCX54E6327 application, or BCX54E6327 equivalent, key selection criteria include V_CEO/V_CBO rating alignment, h_FE group (10/16), thermal resistance (R_thJS = 20 K/W), SOT89 package footprint compatibility, and saturation voltage performance under pulsed load conditions.

Technical Context

This transistor operates as a medium-power NPN switch or linear amplifier with fixed-emitter bias topology. Its h_FE is specified across three test points (I_C = 5 mA, 150 mA, 500 mA), supporting both small-signal gain stability and high-current drive capability.

The device uses a planar epitaxial structure with emitter ballasting, enabling robust operation up to T_j = 150 °C and pulse loads governed by duty cycle-dependent derating curves. Thermal design relies on soldering-point referenced R_thJS, not ambient-based R_thJA.

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 (DC)	1.5 A - continuous collector current limit defining steady-state power stage capacity
P_tot	1 W at T_S = 130 °C - total dissipation limit tied to soldering point temperature, not ambient
f_T	100 MHz - transition frequency confirming usable bandwidth up to ~10–20 MHz in practical amplifier designs
V_CE(sat)	0.5 V at I_C = 500 mA / I_B = 50 mA - low saturation voltage enabling <100 mW conduction loss per switch event
h_FE (grp 16)	160–250 - guaranteed DC current gain range at I_C = 150 mA, ensuring predictable base drive requirements
R_thJS	20 K/W - junction-to-soldering-point thermal resistance, critical for PCB copper pour sizing

Pinout & Package

BCX54E6327 is housed in a SOT89 surface-mount plastic package with standardized 3-pin layout and heat sink tab (pin 2). The package provides mechanical stability and thermal path via the exposed emitter pad.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires current-limited drive (max I_B = 200 mA peak) to avoid second breakdown
2	Collector	Main power terminal; connected to heat sink tab for thermal management and current return path
3	Emitter	Reference terminal; internally bonded to package tab and serves as primary ground reference in TO-220-equivalent layouts

Key Features

Feature	Design Value
Low V_CE(sat)	0.5 V at rated I_C/I_B enables <10% voltage drop in 5 V rail switching applications
High f_T	100 MHz supports stable operation in 1–5 MHz PWM gate drivers and AF amplifiers up to 20 kHz
Thermal robustness	R_thJS = 20 K/W allows 50 °C rise over solder point at full 1 W dissipation with minimal copper area
Grouped h_FE	h_FE gr.16 (160–250) ensures consistent base resistor selection across production lots
Complementary pairing	Matched with BCX51 series PNP devices for push-pull output stages without gain mismatch

Applications

Audio Power Amplifier Output Stage

DC-DC Converter Switch

Use Scenario: Final output pair in Class AB headphone amplifier driving 32 Ω loads with ±12 V rails.

IC Role / Device Role / Timing Role: NPN emitter-follower output transistor delivering linear current gain and low output impedance.

Use Value: 0.5 V V_CE(sat) minimizes quiescent power loss and thermal stress during idle and peak output conditions.

Use Scenario: High-side switch in 24 V input, 5 V output buck converter operating at 250 kHz.

IC Role / Device Role / Timing Role: Synchronously switched NPN power transistor controlled by PWM signal with base current limiting.

Use Value: 100 MHz f_T ensures fast turn-on/turn-off transitions, reducing switching losses below 100 ns.

Linear Voltage Regulator Pass Element

Industrial Sensor Signal Conditioning

Use Scenario: Series pass transistor in adjustable 3-terminal regulator supplying 1.2–15 V at up to 1 A.

IC Role / Device Role / Timing Role: Continuously biased NPN transistor regulating output voltage via feedback-controlled base current.

Use Value: 1.5 A I_C rating and 45 V V_CEO support wide input/output differential margins without derating.

Use Scenario: Current-source driver for 4–20 mA loop transmitter interfacing with RTD or strain gauge bridges.

IC Role / Device Role / Timing Role: Precision current mirror active element maintaining stable 20 mA output under varying load impedance.

Use Value: Tight h_FE grouping (160–250) reduces current error to <±2% across temperature and unit variance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCX54-16	Same die, identical h_FE group (16), same SOT89 package, differing only in reel packaging code (E6433 vs E6327)	No functional difference; E6433 denotes 4,000-piece reel vs E6327's 1,000-piece reel	Select based on volume procurement needs and line-side reel change frequency
MJD122G	Higher V_CEO (100 V), higher I_C (3 A), TO-252 package, R_thJS = 10 K/W - physically larger and thermally superior	Used where higher voltage margin or >1.5 A peak current is required; incompatible SOT89 footprint	Choose only if redesigning PCB layout and requiring extended voltage headroom or lower thermal resistance

Compared with BCX54E6327, BCX54-16 offers identical electrical and thermal behavior in a different reel format, while MJD122G delivers higher voltage/current capability at the cost of package incompatibility and increased board space.

Availability

BCX54E6327 is available at Aetrix Electronics and suitable for audio amplifier output stages, DC-DC converter switches, linear voltage regulator pass elements, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for BCX54E6327 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, and industrial control ICs and discrete devices.

BCX54E6327 belongs to Infineon's BCX54–BCX56 family of silicon NPN transistors engineered for reliable, high-current audio-frequency amplification and switching in space-constrained SMT applications.

FAQ

What is the maximum allowable junction temperature for BCX54E6327?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the "Maximum Ratings" table. Operation above this temperature risks permanent degradation of h_FE, increased leakage, and accelerated failure. Derating begins at T_S = 130 °C, where P_tot drops linearly to zero at 150 °C.

Can BCX54E6327 be used in avalanche mode?

No - BCX54E6327 is not rated or characterized for avalanche operation. Its V_CEO rating assumes safe operating area (SOA) compliance with defined voltage/current/time limits. Intentional avalanche use may cause uncontrolled secondary breakdown and irreversible damage.

Is the SOT89 package lead-free and RoHS-compliant?

Yes - BCX54E6327 is manufactured in accordance with RoHS Directive 2011/65/EU and uses lead-free terminations. The SOT89 package meets JEDEC standard J-STD-020 moisture sensitivity level (MSL) 3, requiring bake prior to reflow if exposed >168 hours at ≤30 °C/60% RH.

How does h_FE vary with collector current and temperature?

h_FE peaks near I_C = 150 mA (160–250 for group 16), declines at I_C = 500 mA (min 25), and decreases ~0.5%/°C above 25 °C. At −50 °C, h_FE drops ~30% versus room temperature; at 125 °C, it falls ~40%, per Figure EHP00451 in the datasheet.

BCX54E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

BCX54E6327 FAQ

1.How can I place an order for BCX54E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX54E6327 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 BCX54E6327 reliable?

The price and inventory of BCX54E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX54E6327 is usually 5 days.

3.What payment methods are accepted for BCX54E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX54E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX54E6327?

BCX54E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX54E6327 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 BCX54E6327?

For technical support, including BCX54E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX54E6327 requirements.

6.How does Aetrix verify that BCX54E6327 is sourced from the original manufacturer or authorized distributors?

All BCX54E6327 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 BCX54E6327 meets industry standards.

7.What is the process for return or replacement of BCX54E6327?

All BCX54E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCX54E6327, 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 BCX54E6327 part is unused and in its original packaging.

Return procedure for BCX54E6327:

1.Submit a request within 90 days.

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

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