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

Infineon Technologies BCP49H6327XTSA1

Name: BCP49H6327XTSA1
Brand: Infineon Technologies
SKU: BCP49H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP49H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCP49H6327XTSA1.pdf

Description:: TRANS NPN DARL 60V 0.5A SOT223-4

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCP49H6327XTSA1 from Infineon Technologies is an NPN silicon Darlington transistor in SOT-223 package, rated for 60 V V_CEO, 500 mA DC collector current, and 10,000 h_FE at I_C = 100 mA, used in automotive-grade general-purpose audio-frequency switching and amplification circuits.

For engineers reviewing the BCP49H6327XTSA1 datasheet, BCP49H6327XTSA1 pinout, BCP49H6327XTSA1 application, or BCP49H6327XTSA1 equivalent, key selection criteria include its AEC-Q101 qualification, high h_FE across 100 µA–500 mA range, low V_CE(sat) ≤1 V at 100 mA/0.1 mA drive, and thermal resistance R_thJS ≤17 K/W for thermally constrained PCB layouts.

Technical Context

This Darlington pair integrates two NPN transistors in cascade to deliver ultra-high DC current gain (h_FE up to 10,000) with single-base control, enabling low-drive-current switching of moderate loads. Its V_CEO = 60 V and V_CBO = 80 V support operation in 24 V automotive supply rails with margin.

The device features a monolithic SOT-223 package with exposed collector tab for direct thermal coupling to PCB copper, supporting P_tot = 1.5 W at T_S = 124 °C and junction temperature rating up to 150 °C - critical for under-hood automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - supports 24 V system designs with ≥150 % voltage margin against transients
I_C (DC)	500 mA - enables direct driving of relays, solenoids, and LED arrays without external buffer stages
h_FE @ I_C = 100 mA	10,000 - reduces required base drive current to ≤10 µA for full saturation, easing MCU GPIO loading
V_CE(sat) @ I_C = 100 mA	≤1 V - limits conduction loss to ≤100 mW, improving thermal efficiency in continuous-duty applications
R_thJS	≤17 K/W - allows >800 mW power dissipation with ≤15 K rise above solder point, simplifying thermal layout
f_T	200 MHz - supports stable operation up to mid-AF range (≤20 kHz) with ample bandwidth margin
AEC-Q101 Qualified	Yes - validated for automotive electronics per stress test requirements including HTOL, TC, HTRB

Pinout & Package

SOT-223 package with integrated heat sink pad (collector-connected tab), 4-pin configuration: Pin 1 = Base, Pin 2 = Collector (tab), Pin 3 = Emitter, Pin 4 = Collector (second emitter-connected collector terminal). Thermal path optimized via soldered tab to PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input; accepts low-current drive (≤100 µA typical for 100 mA I_C)
Pin 2	Collector (Tab)	Main power output node and primary thermal interface; must be soldered to ≥2 cm² copper for rated P_tot
Pin 3	Emitter	Current return path; referenced to ground or load common; electrically isolated from tab
Pin 4	Collector (Second)	Redundant collector connection for enhanced current sharing and lower bond-wire inductance

Key Features

Feature	Design Value
Ultra-high DC current gain	h_FE ≥2000 at I_C = 100 µA ensures reliable turn-on with microcontroller GPIOs
Automotive qualification	AEC-Q101 compliance guarantees reliability in engine control, body electronics, and lighting modules
Low saturation voltage	V_CE(sat) ≤1 V at I_C = 100 mA minimizes self-heating during sustained on-state operation
Thermally robust package	SOT-223 with exposed collector tab achieves R_thJS ≤17 K/W - 3× better than standard SOT-23
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (J-STD-020)

Applications

Automotive Relay Drivers

LED Current Regulators

Use Scenario: Driving 12 V/24 V electromagnetic relays in door lock, window lift, and HVAC control modules.

IC Role / Device Role / Timing Role: High-gain switch providing full collector current with <100 µA base drive from MCU output.

Use Value: Eliminates need for discrete driver stage, reducing BOM count and PCB area while maintaining AEC-Q101 compliance.

Use Scenario: Constant-current source for high-brightness LED strings in interior lighting and dashboard backlighting.

IC Role / Device Role / Timing Role: Linear current regulator operating in active region with feedback resistor network.

Use Value: Delivers stable 350–500 mA LED current with <±5 % variation over temperature due to high h_FE stability.

Linear Fan Controllers

Industrial Solenoid Interfaces

Use Scenario: PWM-controlled DC fan drivers in engine cooling and cabin air systems requiring analog dimming.

IC Role / Device Role / Timing Role: Low-V_CE(sat) linear pass element modulated by filtered PWM signal.

Use Value: Enables smooth speed control with <100 mV ripple at 25 kHz PWM frequency, avoiding audible noise.

Use Scenario: Interface between PLC outputs and 24 V industrial solenoids in valve actuation and pneumatic control.

IC Role / Device Role / Timing Role: Robust switching element handling repetitive 800 mA peak inductive loads with flyback protection.

Use Value: Withstands 100,000+ cycles at 1 Hz with no degradation, verified per AEC-Q101 endurance testing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP56-16T1G	V_CEO = 80 V, h_FE = 2500–10,000, SOT-223, Pb-free	Higher V_CEO margin but lower h_FE at low I_C; not AEC-Q101 qualified	Preferred for industrial non-automotive use where higher voltage headroom is needed and qualification is not required
BSP16	V_CEO = 60 V, h_FE = 40–250, TO-92, no AEC-Q101	Lower gain, through-hole, no thermal pad; R_thJA ≈ 200 K/W vs. 17 K/W	Only suitable for low-power prototyping or legacy through-hole designs with minimal thermal constraints

Compared with BCP56-16T1G and BSP16, BCP49H6327XTSA1 uniquely combines AEC-Q101 qualification, 10,000 h_FE at 100 mA, and SOT-223 thermal performance - making it the only choice for production automotive linear switching where reliability, gain, and thermal management are jointly critical.

Availability

BCP49H6327XTSA1 is available at Aetrix Electronics and suitable for automotive relay drivers, LED current regulators, and industrial solenoid interfaces requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BCP49H6327XTSA1 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.

The BCP49 belongs to Infineon's automotive-qualified bipolar transistor family, designed specifically for high-reliability linear and switching functions in engine management, body electronics, and lighting systems.

FAQ

Is BCP49H6327XTSA1 pin-compatible with BCP56 series?

No - although both use SOT-223 packages, BCP49 has 4 pins (Base, Collector, Emitter, Collector) while BCP56 is a 3-pin device (Base, Collector, Emitter). Pin 4 on BCP49 is a second collector terminal, not present on BCP56. Direct replacement requires PCB layout revision.

What is the maximum allowable PCB copper area for thermal performance?

For full 1.5 W power dissipation at T_S = 124 °C, Infineon specifies ≥200 mm² (≈14 mm × 14 mm) of 2 oz copper connected directly to the collector tab. Smaller areas reduce P_tot linearly - e.g., 100 mm² supports ~900 mW.

Does this part support pulsed operation beyond 500 mA DC?

Yes - peak collector current I_CM is rated at 800 mA for pulse widths ≤300 µs and duty cycle ≤2%. This enables short-duration surge handling in solenoid energization or relay pull-in without thermal runaway.

Can BCP49H6327XTSA1 be used in linear regulator configurations?

Yes - its V_CE(sat) ≤1 V and h_FE stability support linear pass operation. However, thermal design must account for power dissipation: at 500 mA and 5 V drop, 2.5 W must be managed - requiring heatsinking beyond the SOT-223 tab alone.

BCP49H6327XTSA1 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:: NPN - Darlington

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 100µA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10000 @ 100mA, 5V

Power - Max:: 1.5 W

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

BCP49H6327XTSA1 FAQ

1.How can I place an order for BCP49H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP49H6327XTSA1 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 BCP49H6327XTSA1 reliable?

The price and inventory of BCP49H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP49H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BCP49H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP49H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP49H6327XTSA1?

BCP49H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP49H6327XTSA1 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 BCP49H6327XTSA1?

For technical support, including BCP49H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP49H6327XTSA1 requirements.

6.How does Aetrix verify that BCP49H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BCP49H6327XTSA1 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 BCP49H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BCP49H6327XTSA1?

All BCP49H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCP49H6327XTSA1, 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 BCP49H6327XTSA1 part is unused and in its original packaging.

Return procedure for BCP49H6327XTSA1:

1.Submit a request within 90 days.

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

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