Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies BCP51E6327HTSA1

Name: BCP51E6327HTSA1
Brand: Infineon Technologies
SKU: BCP51E6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCP51E6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCP51E6327HTSA1.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,085

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCP51E6327HTSA1 from Infineon Technologies is a PNP silicon bipolar junction transistor designed for audio-frequency driver and output stages in linear and switching applications. It features 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, 125 MHz f_T, and SOT-223 surface-mount package. It is RoHS-compliant and AEC-Q101 qualified for automotive-grade reliability.

For engineers reviewing the BCP51E6327HTSA1 datasheet, BCP51E6327HTSA1 pinout, BCP51E6327HTSA1 application, or BCP51E6327HTSA1 equivalent, key selection criteria include DC current gain (h_FE = 63–100 at I_C = 150 mA), thermal resistance (R_thJS ≤ 15 K/W), saturation voltage behavior under pulsed load, and complementary NPN pairing with BCP54 series.

Technical Context

This PNP transistor operates in active, saturation, and cutoff regions with defined breakdown limits: V_(BR)CEO = 45 V, V_(BR)CBO = 45 V, and V_(BR)EBO = 5 V. Its h_FE varies from 25 (min at I_C = 5 mA) to 100 (typ at I_C = 150 mA), supporting both small-signal amplification and medium-power switching.

Thermal performance is characterized by R_thJS ≤ 15 K/W and P_tot = 2 W at T_S ≤ 120°C, with pulse capability up to I_CM = 1.5 A (t_p ≤ 10 ms). The device exhibits f_T = 125 MHz at I_C = 50 mA, confirming suitability for AF and low-MHz signal handling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage before avalanche breakdown in common-emitter configuration.
I_C	1 A - Continuous DC collector current rating; supports medium-power output stage loads without forced cooling.
V_CE(sat)	0.5 V max at I_C = 500 mA / I_B = 50 mA - Low saturation voltage minimizes conduction loss in switching applications.
h_FE	63–100 at I_C = 150 mA - Stable DC current gain enables predictable base drive design for linear amplifiers and saturated switches.
f_T	125 MHz - Transition frequency confirms usable bandwidth up to mid-AF range, suitable for audio drivers and fast-switching control.
R_thJS	≤15 K/W - Junction-to-solder-point thermal resistance allows effective heat transfer to PCB copper when mounted per SOT-223 footprint.
P_tot	2 W at T_S ≤ 120°C - Total power dissipation limit defines maximum steady-state thermal load on the die.

Pinout & Package

SOT-223 package with 4-pin configuration: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (tab-connected). The exposed collector tab provides low-inductance, high-current path and serves as primary thermal interface to PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control terminal for forward-biased junction; requires current-limited drive to achieve target h_FE-dependent I_C.
Pin 2	Collector	Main current sink node; electrically and thermally connected to Pin 4 (collector tab) for enhanced power handling.
Pin 3	Emitter	Current source node in PNP operation; tied to higher potential rail in typical common-emitter amplifier or switch.
Pin 4	Collector (Tab)	Exposed metal pad soldered to PCB ground/power plane; critical for thermal management and low-impedance collector return path.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical stress-enables use in engine control, body electronics, and ADAS subsystems.
Low V_CE(sat)	0.5 V max ensures <1.5 W conduction loss at 3 A peak (with appropriate base drive), improving efficiency in Class-B/AB output stages.
Complementary NPN pairing	Designed alongside BCP54–BCP56 series for matched gain, V_CE(sat), and f_T in push-pull audio amplifiers and H-bridge drivers.
Pb-free & RoHS-compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles and industrial environmental compliance requirements.

Applications

Automotive Audio Amplifier Output Stage

Industrial Linear Power Regulator Pass Element

Use Scenario: Final output stage in 10–20 W automotive head unit amplifier driving 4 Ω speakers.

IC Role / Device Role / Timing Role: PNP pass transistor in complementary emitter-follower configuration, delivering bidirectional current into speaker load.

Use Value: Low V_CE(sat) reduces heat generation during high-current peaks; AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient.

Use Scenario: Series pass element in adjustable 3–15 V, 1 A linear regulator for sensor signal conditioning modules.

IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via feedback loop; operates in active region for ripple suppression.

Use Value: Stable h_FE over I_C range simplifies base bias network design; 2 W P_tot supports full-load operation with minimal heatsinking.

DC Motor Driver Half-Bridge High-Side Switch

LED Constant-Current Driver (Medium Power)

Use Scenario: High-side switch in brushed DC motor control for HVAC actuators or seat positioners.

IC Role / Device Role / Timing Role: PNP transistor switched between saturation and cutoff by microcontroller GPIO through base resistor network.

Use Value: 1 A I_C rating handles stall currents of 12 V/5 W motors; fast turn-off enabled by f_T > 100 MHz supports PWM frequencies up to 20 kHz.

Use Scenario: Constant-current sink for 350 mA white LED strings in automotive interior lighting.

IC Role / Device Role / Timing Role: Current-regulating element in emitter-degenerated configuration with precision sense resistor.

Use Value: Tight h_FE distribution (63–100) ensures consistent LED brightness across production lots; SOT-223 thermal mass stabilizes current under ambient variation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP51TA	Same die, identical V_CEO, I_C, h_FE, and SOT-223 package; differs only in tape-and-reel packaging (3000 pcs vs. 1000 pcs) and date code format.	No functional difference; suitable for identical circuit designs and layout footprints.	Select based on volume procurement needs and preferred reel size.
MJD2955G	Higher V_CEO (60 V), lower f_T (3 MHz), TO-220 package; 1.5 A I_C but larger thermal footprint and slower switching.	Preferred where higher voltage margin is required and board space permits through-hole mounting.	Choose MJD2955G only if V_CEO > 45 V is mandatory and SOT-223 footprint cannot be used.

Compared with BCP51TA, BCP51E6327HTSA1 offers identical electrical performance with optimized logistics packaging; versus MJD2955G, it trades voltage headroom and package size for superior RF response, smaller footprint, and better thermal integration on FR4 PCBs.

Availability

BCP51E6327HTSA1 is available at Aetrix Electronics and suitable for automotive audio amplifiers, industrial linear regulators, DC motor drivers, and medium-power LED drivers requiring stable component supply and AEC-Q101 compliance.

Supply support for BCP51E6327HTSA1 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 BCP51 series belongs to Infineon's bipolar transistor product line, engineered for robust, high-reliability AF and medium-speed switching in automotive and industrial environments where thermal stability and process consistency are critical.

FAQ

Is BCP51E6327HTSA1 pin-compatible with BCP52 or BCP53?

No. While all three share the SOT-223 package and pinout (B-C-E-C), their absolute maximum ratings differ: BCP51 has V_CEO = 45 V, BCP52 = 60 V, and BCP53 = 80 V. Substituting without verifying voltage margin may cause premature failure under transient conditions.

What is the recommended PCB layout for thermal performance?

Maximize copper area connected to Pin 4 (collector tab) using ≥2 cm² of 2-oz copper with ≥4 thermal vias (0.3 mm diameter) to inner ground planes. Keep base and emitter traces short and wide to minimize parasitic inductance in switching applications.

Does this transistor support PWM operation at 20 kHz?

Yes. With f_T = 125 MHz and t_fall/t_rise < 100 ns (per typical switching curves), BCP51E6327HTSA1 supports clean 20 kHz PWM in half-bridge configurations when driven with adequate base current (≥50 mA peak) and proper snubbing.

Can it replace a BC327 in existing designs?

Only with layout and bias verification. BC327 uses SOT-23 (3-pin) while BCP51E6327HTSA1 is SOT-223 (4-pin, higher power). Electrical parameters differ: BC327 has lower I_C (0.5 A) and V_CEO (45 V), but also lower h_FE spread and no AEC-Q101 rating. Not a drop-in replacement.

BCP51E6327HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT223-4-10

BCP51E6327HTSA1 FAQ

1.How can I place an order for BCP51E6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP51E6327HTSA1 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 BCP51E6327HTSA1 reliable?

The price and inventory of BCP51E6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP51E6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCP51E6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP51E6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP51E6327HTSA1?

BCP51E6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP51E6327HTSA1 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 BCP51E6327HTSA1?

For technical support, including BCP51E6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP51E6327HTSA1 requirements.

6.How does Aetrix verify that BCP51E6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCP51E6327HTSA1 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 BCP51E6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCP51E6327HTSA1?

All BCP51E6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCP51E6327HTSA1, 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 BCP51E6327HTSA1 part is unused and in its original packaging.

Return procedure for BCP51E6327HTSA1:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…