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

Infineon Technologies BC817K25WE6327HTSA1

Name: BC817K25WE6327HTSA1
Brand: Infineon Technologies
SKU: BC817K25WE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC817K25WE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC817K25WE6327HTSA1.pdf

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

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Product details

Overview

BC817K25WE6327HTSA1 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 250 mW P_tot at T_S ≤ 130 °C. It delivers h_FE = 160–250 (Group K25) at I_C = 100 mA, V_CE = 1 V, with V_CE(sat) ≤ 0.7 V at I_C = 500 mA / I_B = 50 mA, used in low-voltage switching and signal amplification stages of automotive body control modules.

For engineers reviewing the BC817K25WE6327HTSA1 datasheet, BC817K25WE6327HTSA1 pinout, BC817K25WE6327HTSA1 application, or BC817K25WE6327HTSA1 equivalent, key selection criteria include guaranteed h_FE group (K25), SOT-323 thermal derating profile, V_CE(sat) performance under high I_C/I_B drive, AEC-Q101 qualification, and RoHS-compliant lead-free finish.

Technical Context

This transistor operates as a medium-current, medium-voltage NPN switch or linear amplifier with DC current gain tightly binned per h_FE group (K16/K25/K40). Its design emphasizes stable gain across temperature (−40 °C to 150 °C) and low saturation voltage under forced β = 10 conditions.

Thermal management is defined by R_thJS ≤ 80 K/W (SOT-323 variant), requiring board-level copper area and soldering point thermal path optimization. The device supports pulsed operation up to I_CM = 1000 mA with duty cycle-dependent derating per Infineon Application Note AN077.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown under open-base condition; sets upper rail limit for switching applications.
I_C	500 mA - Continuous DC collector current rating; defines maximum steady-state load drive capability.
h_FE (K25 group)	160–250 - Guaranteed DC current gain range at I_C = 100 mA, V_CE = 1 V; enables predictable base drive sizing.
V_CE(sat)	≤ 0.7 V at I_C = 500 mA / I_B = 50 mA - Low saturation voltage minimizes conduction loss in switching mode.
P_tot	250 mW at T_S ≤ 130 °C - Total power dissipation limit for SOT-323 package; requires thermal pad layout per AN077.
f_T	170 MHz - Transition frequency at I_C = 50 mA, V_CE = 5 V; supports audio and low-speed digital signal amplification.
AEC-Q101	Qualified - Meets stress test requirements for automotive electronics, including temperature cycling and HTRB.

Pinout & Package

BC817K25WE6327HTSA1 uses the SOT-323 (SC-70) plastic surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering on compact PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to ground or low-side reference; polarity defines NPN operation.
2 (Base)	B	Control input; requires current-limited drive (max I_B = 100 mA) to avoid thermal runaway.
3 (Collector)	C	Current source node; connects to load and supply rail; handles full switched current (up to 500 mA).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood and interior modules requiring extended temperature reliability (−40 °C to 150 °C).
h_FE group K25	Guaranteed 160–250 gain range ensures consistent base resistor selection across production lots.
V_CE(sat) ≤ 0.7 V	Reduces power loss and self-heating during saturated switching, improving efficiency in 5–12 V logic-level drivers.
SOT-323 package	0.65 mm pitch, 2.1 × 1.25 × 0.95 mm footprint; enables high-density routing in space-constrained ECUs and sensors.
Pb-free & RoHS	Lead-free terminations meet EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles.

Applications

Automotive Door Module Switching

Industrial Sensor Signal Conditioning

Use Scenario: Driving window lift motor relays and LED status indicators in door control units.

IC Role / Device Role / Timing Role: NPN switch controlling 12 V loads with microcontroller GPIO-level base drive.

Use Value: Low V_CE(sat) reduces heat generation in sealed enclosures; AEC-Q101 ensures 15-year field reliability.

Use Scenario: Amplifying millivolt-level bridge outputs from pressure transducers in PLC analog input cards.

IC Role / Device Role / Timing Role: Linear amplifier stage with fixed-gain bias network for DC-coupled signal boosting.

Use Value: Stable h_FE over temperature enables accurate gain calibration without active compensation.

Consumer Appliance Power Control

Medical Diagnostic Equipment Interface

Use Scenario: Switching solenoid valves and small fans in washing machine control boards.

IC Role / Device Role / Timing Role: Medium-current discrete switch replacing logic-level MOSFETs where gate drive complexity is undesirable.

Use Value: SOT-323 footprint allows direct replacement of legacy TO-92 parts without PCB redesign.

Use Scenario: Isolating and level-shifting TTL signals between patient-connected front-end sensors and isolated microcontrollers.

IC Role / Device Role / Timing Role: Digital buffer with current gain for noise-immune signal transmission across isolation barriers.

Use Value: High f_T (170 MHz) supports clean edge integrity for 1–5 MHz digital control signals.

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
BC817-25,115 (Nexperia)	Same h_FE group (160–250), identical SOT-23 package, but lower P_tot = 250 mW at T_S ≤ 115 °C.	Lacks AEC-Q101 qualification; suitable for industrial/commercial, not automotive.	Select when cost sensitivity outweighs automotive qualification requirement.
MMBT3904LT1G (ON Semiconductor)	h_FE = 100–300 (wider spread), V_CEO = 40 V, same SOT-23/SOT-323 compatibility, AEC-Q101 qualified.	Lower V_CEO limits use in 48 V systems; higher max h_FE may require base resistor recalibration.	Select when broader gain tolerance is acceptable and 40 V rating suffices.

Compared with BC817K25WE6327HTSA1, BC817-25,115 offers identical gain but no automotive qualification, while MMBT3904LT1G trades tighter h_FE control for wider availability and marginally lower voltage rating-both require validation of thermal layout and base drive network.

Availability

BC817K25WE6327HTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for BC817K25WE6327HTSA1 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 ICs, and discrete devices, with global manufacturing and quality certification to ISO/TS 16949.

This part belongs to Infineon's BC817K/BC818K family of AEC-Q101-qualified general-purpose transistors, designed specifically for reliable switching and amplification in harsh-environment automotive and industrial control systems.

FAQ

What is the maximum allowable junction temperature for BC817K25WE6327HTSA1?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent degradation of h_FE and increased leakage. Thermal design must ensure T_j remains below 150 °C under worst-case ambient and power dissipation conditions, using R_thJS ≤ 80 K/W and board-level thermal modeling.

Is BC817K25WE6327HTSA1 compatible with lead-free reflow soldering processes?

Yes, it is fully compatible with standard Pb-free reflow profiles per JEDEC J-STD-020. The device features matte tin (Sn) termination finish and is rated for peak temperatures up to 260 °C for 30 seconds. No special pre-bake or moisture sensitivity handling is required (MSL Level 1).

How does the K25 h_FE group differ from K16 or K40 in practical circuit design?

The K25 group guarantees h_FE = 160–250 at I_C = 100 mA, enabling precise base resistor calculation for predictable saturation. K16 (100–160) requires higher base drive for same I_C, while K40 (250–630) risks overdrive and unnecessary power loss if not adjusted-designers select K25 for balanced gain stability and drive efficiency.

Can BC817K25WE6327HTSA1 be used in linear amplifier configurations?

Yes, it is characterized for linear operation with specified f_T = 170 MHz and h_FE vs. I_C curves across temperature. For stable biasing, use emitter degeneration resistors and ensure V_CE ≥ 1 V to avoid saturation region distortion; thermal feedback via PCB copper is recommended for gain stability above 50 mW dissipation.

BC817K25WE6327HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

BC817K25WE6327HTSA1 FAQ

1.How can I place an order for BC817K25WE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC817K25WE6327HTSA1 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 BC817K25WE6327HTSA1 reliable?

The price and inventory of BC817K25WE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817K25WE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BC817K25WE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817K25WE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC817K25WE6327HTSA1?

BC817K25WE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC817K25WE6327HTSA1 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 BC817K25WE6327HTSA1?

For technical support, including BC817K25WE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817K25WE6327HTSA1 requirements.

6.How does Aetrix verify that BC817K25WE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BC817K25WE6327HTSA1 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 BC817K25WE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BC817K25WE6327HTSA1?

All BC817K25WE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC817K25WE6327HTSA1, 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 BC817K25WE6327HTSA1 part is unused and in its original packaging.

Return procedure for BC817K25WE6327HTSA1:

1.Submit a request within 90 days.

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

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