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

Infineon Technologies BC817K25WH6327XTSA1

Name: BC817K25WH6327XTSA1
Brand: Infineon Technologies
SKU: BC817K25WH6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC817K25WH6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC817K25WH6327XTSA1.pdf

Description:: TRANS NPN 45V 0.5A PG-SOT323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC817K25WH6327XTSA1 from Infineon Technologies is an NPN silicon general-purpose audio-frequency transistor in SOT-323 (SC-70) package, rated for 45 V V_CEO, 500 mA I_C, and minimum h_FE of 160 at 100 mA/1 V. It delivers low V_CE(sat) ≤ 0.7 V at 500 mA/50 mA drive and supports automotive-grade reliability per AEC-Q101. Used in discrete amplifier stages and load switching in automotive body control modules.

For engineers reviewing the BC817K25WH6327XTSA1 datasheet, BC817K25WH6327XTSA1 pinout, BC817K25WH6327XTSA1 application, or BC817K25WH6327XTSA1 equivalent, key selection criteria include guaranteed h_FE group K25 (160–250), SOT-323 thermal resistance R_thJS ≤ 80 K/W, V_CE(sat) performance at high I_C, and AEC-Q101 qualification for under-hood use.

Technical Context

This transistor operates as a linear or saturated switch in low-voltage analog and digital interface circuits. Its h_FE group K25 ensures consistent current amplification across production lots, while the 5 V V_EB0 rating enables robust base biasing in noisy environments.

The device exhibits f_T = 170 MHz at 50 mA/5 V, supporting stable operation up to mid-VHF frequencies in oscillator and RF detector front-ends. C_cb = 3 pF and C_eb = 40 pF values define its small-signal bandwidth limitations and input/output impedance matching requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; supports 24 V automotive supply rails with margin.
I_C	500 mA continuous - Enables direct driving of medium-power LEDs or relay coils without heatsinking.
h_FE (K25 group)	160–250 at 100 mA/1 V - Ensures predictable base drive requirements in linear amplifier and switch designs.
V_CE(sat)	≤ 0.7 V at I_C = 500 mA, I_B = 50 mA - Minimizes conduction loss and self-heating in saturated switching applications.
f_T	170 MHz - Supports stable gain in audio preamp and low-noise RF detector stages up to ~100 MHz.
R_thJS	≤ 80 K/W - Limits junction temperature rise to <100 °C at 250 mW dissipation in SOT-323 on standard PCBs.
AEC-Q101	Qualified - Validated for automotive applications including engine control, lighting, and HVAC actuators.

Pinout & Package

SOT-323 (SC-70) plastic surface-mount package, 3-terminal, lead-free (RoHS compliant), rated for T_j = 150 °C maximum junction temperature.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives base current to enable controlled collector current flow; requires series resistor for current limiting in digital drive.
2 (Emitter)	Reference terminal / current return path	Connected to ground or common reference; establishes emitter-base voltage threshold for turn-on.
3 (Collector)	Output current path	Delivers amplified or switched load current; routed to higher-potential rail or load in common-emitter configuration.

Key Features

Feature	Design Value
Guaranteed h_FE group K25	160–250 range ensures consistent DC gain across batches-reduces need for post-production gain binning in production test.
Low V_CE(sat)	≤ 0.7 V at full 500 mA load reduces power loss by >30% vs. generic transistors with 1.0 V saturation.
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical shock-enables drop-in use in BCM and lighting ECUs.
SOT-323 footprint	0.65 mm pitch, 2.1 × 1.25 mm outline-compatible with high-density PCB layouts and automated reflow assembly.

Applications

Automotive Lighting Control

Industrial Sensor Interface

Use Scenario: Driving LED strings in headlamp or tail lamp modules with PWM dimming.

IC Role / Device Role / Timing Role: Discrete NPN switch controlling LED current path between 12 V rail and ground.

Use Value: Low V_CE(sat) minimizes heat generation during 100% duty-cycle operation, extending LED driver lifetime.

Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor, potentiometer) into microcontroller ADC inputs.

IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance.

Use Value: Stable h_FE group ensures predictable gain and offset across temperature, improving measurement repeatability.

Consumer Audio Amplifier Stage

Power Supply Enable Switch

Use Scenario: First-stage preamplifier in portable speaker systems using single-supply 3.3 V or 5 V rails.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed-bias network.

Use Value: f_T = 170 MHz provides sufficient bandwidth for full audio spectrum (20 Hz–20 kHz) with flat gain response.

Use Scenario: Enabling/disabling auxiliary 3.3 V or 5 V rails in embedded controllers based on MCU GPIO signals.

IC Role / Device Role / Timing Role: Saturated switch turning on PMOS/NMOS pass FET gate drivers.

Use Value: Guaranteed h_FE ≥ 160 ensures reliable turn-on of gate drivers even at low V_CC (down to 3 V).

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BW,115	Lower V_CEO (45 V same), but h_FE group B (110–220); no AEC-Q101 qualification.	Not suitable for automotive under-hood use; acceptable for consumer-grade sensor interfaces.	Select when cost sensitivity outweighs automotive qualification and tighter h_FE tolerance.
MMBT3904LT1G	Same V_CEO/I_C, but h_FE min = 100 (group 1); R_thJS = 200 K/W (SOT-23) limits power handling.	Limited to low-duty-cycle or low-current switching due to higher thermal resistance.	Prefer for non-automotive, space-constrained designs where SOT-23 footprint is required over SOT-323.

Compared with BC817K25WH6327XTSA1, BC847BW offers lower cost but lacks automotive qualification and h_FE consistency, while MMBT3904LT1G trades thermal performance for wider package availability-making BC817K25WH6327XTSA1 optimal for AEC-Q101-compliant, thermally constrained switching.

Availability

BC817K25WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and consumer audio amplifier applications requiring stable component supply and AEC-Q101 compliance.

Supply support for BC817K25WH6327XTSA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

The BC817K series belongs to Infineon's AEC-Q101-qualified general-purpose bipolar transistor product line, designed specifically for reliable switching and amplification in automotive body electronics and industrial control systems.

FAQ

What is the pin configuration for BC817K25WH6327XTSA1?

BC817K25WH6327XTSA1 uses standard SOT-323 pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This matches JEDEC TO-236AB and is confirmed in Infineon's BC817K datasheet revision 2011-09-19, page 1. No variant or alternate mapping exists for this part number.

Is BC817K25WH6327XTSA1 suitable for automotive applications?

Yes-BC817K25WH6327XTSA1 is explicitly qualified to AEC-Q101 standards, with testing performed for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Its 150 °C max junction temperature and guaranteed h_FE group support under-hood deployment in lighting, HVAC, and body control modules.

How does the K25 h_FE group differ from K16 or K40?

The K25 group specifies h_FE = 160–250 at I_C = 100 mA and V_CE = 1 V, offering higher minimum gain than K16 (100–160) and lower maximum gain than K40 (250–630). This middle-range grouping balances drive efficiency and stability in feedback-sensitive circuits like linear regulators and sensor buffers.

Can BC817K25WH6327XTSA1 replace BC817-25 in existing designs?

Yes-BC817K25WH6327XTSA1 is the RoHS-compliant, AEC-Q101-qualified successor to BC817-25, sharing identical electrical specs, pinout, and SOT-323 package. The "K" suffix denotes automotive qualification, and "WH6327XTSA1" indicates tape-and-reel packaging per Infineon's ordering code convention.

BC817K25WH6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 160 @ 100mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 170MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT323

BC817K25WH6327XTSA1 FAQ

1.How can I place an order for BC817K25WH6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC817K25WH6327XTSA1 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 BC817K25WH6327XTSA1 reliable?

The price and inventory of BC817K25WH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817K25WH6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BC817K25WH6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817K25WH6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC817K25WH6327XTSA1?

BC817K25WH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC817K25WH6327XTSA1 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 BC817K25WH6327XTSA1?

For technical support, including BC817K25WH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817K25WH6327XTSA1 requirements.

6.How does Aetrix verify that BC817K25WH6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BC817K25WH6327XTSA1 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 BC817K25WH6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BC817K25WH6327XTSA1?

All BC817K25WH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC817K25WH6327XTSA1, 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 BC817K25WH6327XTSA1 part is unused and in its original packaging.

Return procedure for BC817K25WH6327XTSA1:

1.Submit a request within 90 days.

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

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