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

Infineon Technologies BCP54H6327XTSA1

Name: BCP54H6327XTSA1
Brand: Infineon Technologies
SKU: BCP54H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP54H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCP54H6327XTSA1.pdf

Description:: TRANS NPN 45V 1A PG-SOT223-4-10

Quantity:: RFQ Add To RFQ list

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Inventory:2,695

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Product details

Overview

BCP54H6327XTSA1 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for audio-frequency driver and output stages in linear and switching applications. It delivers 1 A continuous collector current, 45 V collector-emitter breakdown voltage (V_(BR)CEO), and low 0.5 V collector-emitter saturation voltage (V_CE(sat)) at I_C = 500 mA / I_B = 50 mA, enabling efficient power amplification in compact consumer and industrial audio circuits.

For engineers reviewing the BCP54H6327XTSA1 datasheet, BCP54H6327XTSA1 pinout, BCP54H6327XTSA1 application, or BCP54H6327XTSA1 equivalent, key selection criteria include its SOT-223 package thermal resistance (R_thJS ≤ 15 K/W), DC current gain range (h_FE = 63–100 at I_C = 150 mA), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This transistor operates as a medium-power NPN switch or linear amplifier with complementary PNP counterparts (BCP51–BCP53). Its design emphasizes low V_CE(sat) and high I_C capability to minimize conduction loss in Class AB audio output stages and relay/LED driver circuits.

Thermal performance is defined by R_thJS ≤ 15 K/W and T_j = 150 °C maximum junction temperature, supporting operation up to 120 °C case temperature with 2 W total power dissipation. The device uses epitaxial planar technology and meets RoHS requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)CEO	45 V - Maximum safe collector-emitter voltage before avalanche breakdown under open-base conditions
I_C (continuous)	1 A - Continuous collector current rating enabling direct drive of small speakers or solenoids
V_CE(sat)	0.5 V @ I_C = 500 mA, I_B = 50 mA - Low saturation voltage reduces power loss and heat generation in switching mode
h_FE	63–100 @ I_C = 150 mA, V_CE = 2 V - Stable DC current gain supports predictable biasing in amplifier designs
f_T	100 MHz @ I_C = 50 mA, V_CE = 10 V - Sufficient transition frequency for AF and low-MHz signal amplification
R_thJS	≤ 15 K/W - Thermal resistance from junction to soldering point enables effective heat transfer to PCB copper pour
P_tot	2 W @ T_S ≤ 120 °C - Total power dissipation limit defining safe operating area with adequate heatsinking

Pinout & Package

BCP54H6327XTSA1 is housed in a surface-mount SOT-223 package with four terminals: emitter (pin 3), base (pin 1), collector (pins 2 and 4 tied internally), and tab (collector-connected thermal pad). The package supports PCB-level thermal management via the exposed collector tab.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input terminal; requires ~50 mA base drive for full saturation at 500 mA collector current
Pin 2	Collector	Main current-carrying terminal; electrically connected to Pin 4 and metal tab for thermal conduction
Pin 3	Emitter	Current return path; referenced to ground or negative rail in common-emitter configurations
Pin 4 / Tab	Collector (thermal)	Internally tied to collector; provides low-thermal-resistance path to PCB copper for heat dissipation

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control modules and body electronics
Low V_CE(sat)	0.5 V at rated I_C/I_B minimizes conduction loss and improves efficiency in switching regulators
SOT-223 thermal design	Exposed collector tab enables ≥1.5 W power handling on standard 2 oz copper with 2 cm² thermal pad
Complementary PNP pairing	Direct match with BCP51–BCP53 series for push-pull and H-bridge output stage implementation
Pb-free / RoHS compliant	Meets global environmental regulations without compromising electrical or thermal performance

Applications

Audio Power Amplifier Output Stage

Automotive Door Lock Actuator Driver

Use Scenario: Final output stage in Class AB headphone or speaker amplifier ICs requiring discrete boost capability.

IC Role / Device Role / Timing Role: NPN power switch delivering up to 1 A peak current into 8 Ω load with minimal crossover distortion.

Use Value: Low 0.5 V V_CE(sat) preserves headroom and reduces thermal load on PCB, enabling compact enclosure designs.

Use Scenario: Driving 12 V DC solenoid-based door lock mechanisms in passenger vehicles.

IC Role / Device Role / Timing Role: High-current saturated switch controlled by microcontroller GPIO with flyback diode protection.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; 45 V V_(BR)CEO accommodates load dump transients.

Industrial Relay Control Module

DC-DC Converter Pre-regulator Switch

Use Scenario: Solid-state replacement for electromechanical relays in PLC I/O modules.

IC Role / Device Role / Timing Role: Medium-power switching element interfacing 3.3 V/5 V logic to 24 V industrial control loads.

Use Value: 1 A I_C rating supports multiple relay coils in parallel; SOT-223 footprint simplifies layout and rework.

Use Scenario: Pre-regulation stage in multi-rail power supplies stepping down 48 V to 12 V before buck conversion.

IC Role / Device Role / Timing Role: Linear pass transistor operating in active region to reduce input ripple and EMI before downstream switching regulator.

Use Value: 100 MHz f_T and stable h_FE ensure predictable loop response; R_thJS ≤ 15 K/W maintains <100 °C junction rise at 1.2 W dissipation.

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	Same die, TO-92 package; higher R_thJA, lower P_tot (0.5 W)	Limited to low-power signal switching; unsuitable for >200 mA continuous loads	Select when through-hole assembly or minimal thermal demand is required
MJD112G	Higher V_(BR)CEO (100 V), higher V_CE(sat) (1.5 V), TO-252 package	Better for 48 V industrial systems but less efficient at 12 V due to higher saturation loss	Select when higher voltage margin outweighs conduction loss penalty

Compared with BCP54TA and MJD112G, BCP54H6327XTSA1 uniquely balances 45 V rating, 0.5 V V_CE(sat), and 2 W power handling in SOT-223-making it optimal for space-constrained 12–24 V automotive and industrial switching where thermal efficiency and AEC-Q101 compliance are jointly critical.

Availability

BCP54H6327XTSA1 is available at Aetrix Electronics and suitable for audio amplifier output stages, automotive actuator drivers, industrial relay modules, and DC-DC pre-regulators requiring stable component supply across production lifecycles.

Supply support for BCP54H6327XTSA1 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.

BCP54H6327XTSA1 belongs to the BCP54–BCP56 family of AEC-Q101-qualified AF transistors engineered for reliable, thermally efficient switching and amplification in automotive body electronics and industrial control systems.

FAQ

Is BCP54H6327XTSA1 pin-compatible with BCP54-16?

Yes-both share identical SOT-223 pin configuration (Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector/Tab) and mechanical outline. The "-16" suffix denotes a different packaging variant (reel size and marking), not a pinout or electrical change.

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is 100 mA per datasheet. For reliable long-term operation at I_C = 500 mA, design with I_B = 50 mA (h_FE ≥ 10), ensuring saturation while avoiding base-emitter junction overstress or thermal runaway.

Does this transistor require an external flyback diode when driving inductive loads?

Yes-BCP54H6327XTSA1 lacks integrated clamp diodes. When switching relays, solenoids, or motors, a fast-recovery diode (e.g., 1N4148 or BAT54) must be placed across the load to suppress inductive voltage spikes exceeding 45 V and prevent junction breakdown.

Can BCP54H6327XTSA1 be used in linear regulator pass applications?

Yes-it supports linear operation with V_CE > V_CE(sat), provided power dissipation remains within 2 W and junction temperature stays ≤150 °C. Use with adequate heatsinking and current limiting; note that h_FE variation with temperature affects regulation stability.

BCP54H6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

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:: PG-SOT223-4-10

BCP54H6327XTSA1 FAQ

1.How can I place an order for BCP54H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP54H6327XTSA1 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 BCP54H6327XTSA1 reliable?

The price and inventory of BCP54H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP54H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BCP54H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP54H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP54H6327XTSA1?

BCP54H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP54H6327XTSA1 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 BCP54H6327XTSA1?

For technical support, including BCP54H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP54H6327XTSA1 requirements.

6.How does Aetrix verify that BCP54H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BCP54H6327XTSA1 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 BCP54H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BCP54H6327XTSA1?

All BCP54H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCP54H6327XTSA1, 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 BCP54H6327XTSA1 part is unused and in its original packaging.

Return procedure for BCP54H6327XTSA1:

1.Submit a request within 90 days.

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

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