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

Infineon Technologies BCP49H6419XTMA1

Name: BCP49H6419XTMA1
Brand: Infineon Technologies
SKU: BCP49H6419XTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP49H6419XTMA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCP49H6419XTMA1.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCP49H6419XTMA1 from Infineon Technologies is an NPN silicon Darlington transistor in SOT223 package, rated for 60 V V_CEO, 500 mA DC collector current, and minimum h_FE of 2000 at 100 µA/1 V - used in automotive lighting control, relay drivers, and low-frequency power switching where high current gain and robust thermal performance are required.

For engineers reviewing the BCP49H6419XTMA1 datasheet, BCP49H6419XTMA1 pinout, BCP49H6419XTMA1 application, or BCP49H6419XTMA1 equivalent, this page delivers verified electrical specs, validated SOT223 terminal mapping, AEC-Q101 qualification status, thermal resistance (R_thJS ≤17 K/W), and real-world use cases in automotive and industrial load switching.

Technical Context

This Darlington pair integrates two NPN transistors in cascade to achieve ultra-high DC current gain (up to 10,000 at 100 mA), enabling microcontroller-level base drive to switch loads up to 500 mA. It features V_CEO = 60 V and V_CBO = 80 V, supporting operation in 24 V automotive systems with margin.

Thermal design is enabled by its SOT223 package with R_thJS ≤17 K/W and P_tot = 1.5 W at T_S = 124 °C. Saturation voltages are specified at V_CEsat ≤1 V and V_BEsat ≤1.5 V under IC = 100 mA / IB = 0.1 mA conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - supports 24 V nominal automotive bus with 150 % overvoltage margin
I_C (DC)	500 mA - sufficient for driving solenoids, small relays, and LED arrays
h_FE min	2000 @ 100 µA/1 V - enables direct GPIO drive without external pre-biasing
V_CEsat max	1 V @ 100 mA/0.1 mA - limits conduction loss to ≤100 mW at rated current
R_thJS	≤17 K/W - allows 1.5 W dissipation with ≤25.5 K rise above solder point
f_T	200 MHz typ - supports switching up to ~10–20 kHz with stable gain
AEC-Q101	Qualified - certified for automotive electronics per stress test requirements

Pinout & Package

SOT223 package with exposed emitter pad for thermal enhancement; 4-terminal configuration with dual collector connection for current sharing and reduced saturation voltage.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input; requires current-limited drive due to Darlington input impedance
Pin 2	Collector	Main high-side load connection; electrically tied to Pin 4
Pin 3	Emitter	Power return path; large copper pad for heat sinking and low-impedance ground routing
Pin 4	Collector	Second collector terminal; paralleled with Pin 2 to reduce on-resistance and improve thermal distribution

Key Features

Feature	Design Value
Ultra-high h_FE	Min 2000 at low bias → eliminates need for multi-stage driver circuits
AEC-Q101 qualified	Validated for automotive temperature range (−40 °C to 150 °C junction)
SOT223 thermal performance	R_thJS ≤17 K/W → enables 1.5 W operation with minimal heatsinking
Dual collector terminals	Pins 2 & 4 internally connected → improves current sharing and reduces localized heating
Pb-free RoHS compliance	Meets EU Directive 2011/65/EU; no exemption required for lead content

Applications

Automotive Interior Lighting Control

Industrial Relay Driver Stage

Use Scenario: Switching 12 V/24 V incandescent or LED cabin lights using MCU GPIO output.

IC Role / Device Role / Timing Role: High-gain Darlington switch providing >100× current amplification from 5 mA MCU pin.

Use Value: Eliminates need for discrete base resistor network or secondary transistor stage; reduces BOM count and PCB area.

Use Scenario: Driving 24 V DC coil relays in PLC I/O modules with 3.3 V logic interface.

IC Role / Device Role / Timing Role: Final-stage load switch handling 300–500 mA coil current with <1 V saturation drop.

Use Value: Ensures reliable relay pull-in at low supply voltages while limiting self-heating to <0.5 W.

Low-Frequency Motor Speed Control

Power Supply Enable Switch

Use Scenario: PWM-based speed regulation of small DC fans or pumps in HVAC subsystems.

IC Role / Device Role / Timing Role: Low-frequency (<5 kHz) power switch operating in linear or saturated mode.

Use Value: Maintains h_FE >4000 at 10 mA bias, enabling precise duty-cycle control without gate-drive complexity.

Use Scenario: Enabling 5 V or 3.3 V auxiliary rails in automotive infotainment head units.

IC Role / Device Role / Timing Role: High-side enable switch with fast turn-off via base discharge path.

Use Value: Supports controlled power sequencing with <1 µs turn-off delay when paired with base pull-down resistor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP52H6419XTMA1	PNP complement; same package, V_CEO = −60 V, h_FE ≥2000	Used in high-side switching or complementary push-pull stages	Select when sourcing current from rail instead of sinking to ground
STBV33D	Higher V_CEO = 80 V, lower h_FE (min 1000), SOT223-4L	Better suited for 48 V telecom or industrial supplies	Choose for higher voltage margin where gain >2000 not required

Compared with BCP49H6419XTMA1, BCP52H6419XTMA1 provides polarity-matched functionality in identical packaging, while STBV33D trades gain for extended voltage rating - both require revalidation of base drive and thermal layout.

Availability

BCP49H6419XTMA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay drivers, and low-frequency motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BCP49H6419XTMA1 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, with global manufacturing and quality certification infrastructure.

The BCP49 series belongs to Infineon's bipolar power transistor product line, designed specifically for AEC-Q101-compliant automotive load switching applications demanding high gain, thermal robustness, and long-term reliability.

FAQ

What is the maximum continuous collector current for BCP49H6419XTMA1?

The absolute maximum DC collector current is 500 mA at T_S = 124 °C. Derating applies above this case temperature: total power dissipation drops linearly to zero at 150 °C junction temperature. Pulse operation up to 800 mA is permitted for t ≤ 300 µs with duty cycle ≤2%.

Is BCP49H6419XTMA1 suitable for 24 V automotive battery monitoring circuits?

Yes - its 60 V V_CEO rating provides 150 % margin over 24 V nominal systems, and AEC-Q101 qualification confirms operation from −40 °C to +150 °C junction. However, it must be used as a switch, not a linear regulator, due to limited safe operating area at high V_CE.

How does the dual-collector configuration affect PCB layout?

Pins 2 and 4 are internally shorted collectors, so both must be routed to the same net - typically the load supply rail. This configuration lowers effective on-resistance and spreads thermal load across two bond wires and pads, improving reliability under sustained 500 mA operation.

Can BCP49H6419XTMA1 replace BC817 in existing designs?

No - BC817 is a single NPN transistor (h_FE ≈ 100–630), while BCP49H6419XTMA1 is a Darlington with h_FE ≥2000 and higher V_CEsat. Direct substitution would cause excessive base current draw and potential saturation failure; redesign of base resistor and thermal layout is mandatory.

BCP49H6419XTMA1 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

BCP49H6419XTMA1 FAQ

1.How can I place an order for BCP49H6419XTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP49H6419XTMA1 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 BCP49H6419XTMA1 reliable?

The price and inventory of BCP49H6419XTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP49H6419XTMA1 is usually 5 days.

3.What payment methods are accepted for BCP49H6419XTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP49H6419XTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP49H6419XTMA1?

BCP49H6419XTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP49H6419XTMA1 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 BCP49H6419XTMA1?

For technical support, including BCP49H6419XTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP49H6419XTMA1 requirements.

6.How does Aetrix verify that BCP49H6419XTMA1 is sourced from the original manufacturer or authorized distributors?

All BCP49H6419XTMA1 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 BCP49H6419XTMA1 meets industry standards.

7.What is the process for return or replacement of BCP49H6419XTMA1?

All BCP49H6419XTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCP49H6419XTMA1, 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 BCP49H6419XTMA1 part is unused and in its original packaging.

Return procedure for BCP49H6419XTMA1:

1.Submit a request within 90 days.

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

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