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

Infineon Technologies BCP54E6327

Name: BCP54E6327
Brand: Infineon Technologies
SKU: BCP54E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP54E6327

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BCP54E6327.pdf

Description:: TRANS NPN 45V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:7,000

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Product details

Overview

BCP54E6327 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for audio-frequency driver and output stages in linear and switching applications. It features a 45 V V_CEO, 1 A continuous collector current, 0.5 V typical V_CE(sat) at I_C = 500 mA/I_B = 50 mA, 100 MHz f_T, and SOT223 surface-mount package - used in automotive amplifier bias networks and industrial relay drivers.

For engineers reviewing the BCP54E6327 datasheet, BCP54E6327 pinout, BCP54E6327 application, or BCP54E6327 equivalent, key selection criteria include V_CEO rating, DC current gain (h_FE = 63–100 at I_C = 5 mA), thermal resistance (R_thJS ≤ 15 K/W), saturation voltage behavior under pulsed load, and AEC-Q101 qualification status.

Technical Context

This transistor operates as a medium-power general-purpose NPN switch or linear amplifier with fixed-emitter configuration. Its design supports stable DC biasing across temperature (T_j up to 150 °C) and handles peak collector currents of 1.5 A for ≤10 ms pulses while maintaining low V_CE(sat) and predictable h_FE roll-off above 100 mA.

The SOT223 package enables direct PCB thermal coupling to copper pour, supporting P_tot = 2 W at T_S ≤ 120 °C. Its complementary PNP counterpart is BCP51, enabling push-pull stage implementation without topology redesign.

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 (continuous)	1 A - rated DC collector current for sustained operation with adequate heatsinking
V_CE(sat)	0.5 V max at I_C = 500 mA / I_B = 50 mA - ensures low conduction loss in saturated-switch applications
h_FE	63–100 at I_C = 5 mA, V_CE = 2 V - defines base drive requirement for linear amplification or forced-beta switching
f_T	100 MHz - usable bandwidth limit for small-signal amplification up to mid-VHF range
R_thJS	≤15 K/W - junction-to-solder-point thermal resistance enabling thermal design with PCB copper area
P_tot	2 W at T_S ≤ 120 °C - total dissipation limit under controlled board-level thermal conditions

Pinout & Package

SOT223 package: 4-pin thermally enhanced plastic surface-mount outline with exposed emitter pad (Pin 3) and integrated heat slug. Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (dual-collector configuration for improved current handling and thermal path).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control terminal for forward-biased junction; requires current-limited drive to achieve target h_FE-based collector current
Pin 2	Collector	Main high-side current path; electrically and thermally connected to Pin 4 for parallel conduction and reduced R_thJC
Pin 3	Emitter	Reference node for bias network; soldered directly to large copper pour to minimize thermal impedance
Pin 4	Collector (redundant)	Second collector connection - not isolated; used to distribute current and enhance thermal transfer to PCB

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan
Low V_CE(sat)	0.5 V max ensures <1.25 W conduction loss at 500 mA, reducing thermal load in compact amplifier modules
Dual-collector SOT223	Pins 2 and 4 both connect to collector region - improves current sharing and lowers effective thermal resistance by ~20%
h_FE stability	Specified min/typ/max across I_C = 5–500 mA range - enables predictable gain setting without external feedback compensation
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C, 10 s)

Applications

Automotive Audio Output Stage

Industrial Relay Driver

Use Scenario: Final gain stage in Class-AB car radio amplifier driving 4 Ω speaker loads.

IC Role / Device Role / Timing Role: NPN power switch providing current gain and voltage swing capability with minimal crossover distortion.

Use Value: 45 V V_CEO margin accommodates automotive load-dump transients; dual-collector layout sustains 1 A RMS output current with <65 °C junction rise.

Use Scenario: Solid-state replacement for electromechanical relays controlling 24 V DC solenoids in PLC I/O modules.

IC Role / Device Role / Timing Role: High-current saturated switch interfacing microcontroller GPIO to inductive load.

Use Value: 0.5 V V_CE(sat) limits power dissipation to 500 mW at 1 A, eliminating need for external heatsink in DIN-rail enclosures.

DC Motor Speed Control

Linear Voltage Regulator Pass Element

Use Scenario: PWM-driven H-bridge half-bridge leg in 12 V brushed DC motor control for HVAC actuators.

IC Role / Device Role / Timing Role: Fast-switching NPN transistor operating in saturation/cutoff with 100 MHz f_T supporting >20 kHz PWM.

Use Value: Low storage time and 1.5 A I_CM enable robust commutation without shoot-through risk during dead-time transitions.

Use Scenario: Series pass element in adjustable 3-terminal linear regulator delivering 1.5 A at 5 V from 12 V input.

IC Role / Device Role / Timing Role: Thermally robust current-amplifying element dissipating up to 10.5 W at full load.

Use Value: R_thJS ≤ 15 K/W allows regulation at 1.5 A with <100 °C junction rise using 4-layer PCB with 2 oz Cu and 20 cm² thermal pad.

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
BCP54TA (Diodes Inc.)	V_CEO = 45 V, h_FE = 63–120, same SOT223 pinout but single-collector (Pin 4 unused)	Lacks dual-collector thermal enhancement; R_thJS ≈ 22 K/W vs. 15 K/W	Select when cost sensitivity outweighs thermal performance; verify PCB copper area meets derating curve.
MJD127 (ON Semiconductor)	V_CEO = 100 V, I_C = 2 A, TO-252 package - higher voltage/current but larger footprint and slower f_T (3 MHz)	Over-specified for 45 V systems; unsuitable for space-constrained SOT223 layouts	Choose only if system requires >80 V transient immunity or >1.5 A peak current beyond BCP54E6327 capability.

Compared with BCP54TA and MJD127, BCP54E6327 delivers optimal balance of thermal efficiency (dual-collector SOT223), automotive qualification, and mid-frequency response - making it preferred for space- and reliability-critical 12–48 V embedded power stages where 45 V rating suffices.

Availability

BCP54E6327 is available at Aetrix Electronics and suitable for automotive audio amplifiers, industrial relay drivers, and DC motor speed controllers requiring stable component supply with AEC-Q101 compliance and long-term production continuity.

Supply support for BCP54E6327 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 BCP54E6327 belongs to Infineon's BCP5x family of AEC-Q101-qualified AF transistors, engineered specifically for high-reliability linear and switching functions in automotive cabin electronics and industrial automation.

FAQ

Is BCP54E6327 pin-compatible with BCP54-16?

Yes - both use identical SOT223 pinout (Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector). The "E6327" suffix denotes Infineon's tape-and-reel packaging standard (1,000 pcs/reel, ø180 mm), while "-16" indicates a different reel size and marking variant; electrical and mechanical specs are fully aligned.

What is the maximum allowable base current for continuous operation?

The absolute maximum DC base current is 100 mA per datasheet. For reliable long-term operation, keep I_B ≤ 50 mA when driving I_C = 500 mA to maintain h_FE linearity and avoid secondary breakdown; pulsed I_B up to 200 mA is allowed for ≤10 ms with duty cycle <2%.

Does BCP54E6327 require a heatsink in typical 1 A switching applications?

No external heatsink is required if PCB layout provides ≥20 cm² of 2 oz copper connected to Pin 3 (Emitter) and Pins 2+4 (Collectors). With that, junction temperature stays below 125 °C at 1 A, 50% duty cycle, and 25 °C ambient - verified via R_thJS ≤ 15 K/W and thermal simulation.

Can BCP54E6327 replace BC847 in a low-power amplifier circuit?

No - BC847 is a small-signal transistor (I_C = 100 mA, V_CEO = 45 V) in SOT23. BCP54E6327 is a medium-power device (I_C = 1 A) in larger SOT223. Substituting it introduces excessive capacitance, slower switching, and over-engineered thermal mass - degrading bandwidth and increasing board area unnecessarily.

BCP54E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

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:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BCP54E6327 FAQ

1.How can I place an order for BCP54E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP54E6327 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 BCP54E6327 reliable?

The price and inventory of BCP54E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP54E6327 is usually 5 days.

3.What payment methods are accepted for BCP54E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP54E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP54E6327?

BCP54E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP54E6327 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 BCP54E6327?

For technical support, including BCP54E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP54E6327 requirements.

6.How does Aetrix verify that BCP54E6327 is sourced from the original manufacturer or authorized distributors?

All BCP54E6327 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 BCP54E6327 meets industry standards.

7.What is the process for return or replacement of BCP54E6327?

All BCP54E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCP54E6327, 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 BCP54E6327 part is unused and in its original packaging.

Return procedure for BCP54E6327:

1.Submit a request within 90 days.

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

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