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

Infineon Technologies BC818K16WE6327HTSA1

Name: BC818K16WE6327HTSA1
Brand: Infineon Technologies
SKU: BC818K16WE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC818K16WE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC818K16WE6327HTSA1.pdf

Description:: TRANS NPN 25V 0.5A PG-SOT323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC818K16WE6327HTSA1 from Infineon Technologies is an NPN silicon general-purpose audio-frequency transistor in SOT-323 package, rated for 25 V V_CEO, 500 mA I_C, and 250 mW P_tot at T_S ≤ 130 °C, with h_FE = 100–160 (IC = 100 mA, V_CE = 1 V), V_CE(sat) ≤ 0.7 V (IC = 500 mA, IB = 50 mA), and f_T = 170 MHz - used in low-voltage switching and linear amplification stages of automotive body control modules.

For engineers reviewing the BC818K16WE6327HTSA1 datasheet, BC818K16WE6327HTSA1 pinout, BC818K16WE6327HTSA1 application, or BC818K16WE6327HTSA1 equivalent, key selection criteria include verified V_CE(sat) at high I_C, thermal derating behavior in SOT-323, h_FE group consistency across temperature, and AEC-Q101 qualification for automotive ambient operation.

Technical Context

This transistor operates as a single-element NPN bipolar junction device optimized for linear amplification and saturated switching in DC-coupled or capacitively coupled AF signal paths. Its design emphasizes low V_CE(sat) and stable h_FE over −40 °C to 150 °C, with guaranteed minimum h_FE = 100 at I_C = 100 mA and V_CE = 1 V per h_FE-group 16 specification.

Thermal performance is defined by R_thJS ≤ 80 K/W (SOT-323 package, T_S ≤ 130 °C), and maximum ratings include V_CBO = 30 V, V_EBO = 5 V, and I_CM = 1000 mA (non-repetitive peak). It is Pb-free and RoHS-compliant, qualified per AEC-Q101 for automotive use.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 V - maximum collector-emitter voltage before breakdown under open-base condition; sets upper rail limit for switching applications.
I_C	500 mA continuous - usable collector current level before thermal derating; supports medium-power driver stages.
h_FE (100 mA, 1 V)	100–160 - guaranteed DC current gain range for group 16; enables predictable base drive sizing in amplifier bias networks.
V_CE(sat)	≤ 0.7 V at I_C = 500 mA, I_B = 50 mA - low saturation voltage reduces conduction loss in switch-mode operation.
f_T	170 MHz - transition frequency defines usable bandwidth for small-signal amplification up to ~10–20 MHz.
P_tot	250 mW at T_S ≤ 130 °C - total power dissipation limit in SOT-323; requires PCB copper area for thermal management.
R_thJS	≤ 80 K/W - junction-to-solder-point thermal resistance; informs heatsinking requirements for sustained 300–400 mW pulsed loads.

Pinout & Package

SOT-323 (SC-70) plastic surface-mount package with standard 3-pin configuration: compact footprint (2.1 × 1.25 × 0.95 mm), gull-wing leads, and moisture sensitivity level (MSL) 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input terminal	Receives base drive current to modulate collector current; requires series resistor for bias stability and ESD protection.
2 (Emitter)	Common reference node	Connected to ground or low-impedance return path; forms emitter-follower or common-emitter topology anchor point.
3 (Collector)	Output current terminal	Delivers amplified/saturated output current; routed to load or next stage; must observe V_CEO and I_C limits.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood applications including temperature cycling, humidity, and mechanical shock per JESD47.
Low V_CE(sat)	≤ 0.7 V ensures <100 mW conduction loss at 500 mA, critical for thermally constrained PCB layouts.
Stable h_FE vs. temperature	h_FE maintains ≥70% of 25 °C value at 105 °C, enabling robust bias design in engine bay environments.
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C, 10 s).

Applications

Automotive Door Module Driver

Industrial Sensor Signal Conditioning

Use Scenario: Driving LED status indicators and small solenoid locks in vehicle door control units exposed to −40 °C to 105 °C ambient.

IC Role / Device Role / Timing Role: NPN switch operating in saturation mode with fixed base bias, delivering 350 mA pulses to 12 V loads.

Use Value: Low V_CE(sat) minimizes self-heating during repeated actuation; AEC-Q101 qualification ensures long-term reliability under vibration and thermal cycling.

Use Scenario: Amplifying millivolt-level bridge outputs from pressure transducers in factory automation PLC I/O modules.

IC Role / Device Role / Timing Role: Common-emitter DC amplifier with emitter degeneration resistor, providing 20–30 dB voltage gain at <100 kHz.

Use Value: Tight h_FE grouping (100–160) enables consistent gain calibration across production batches without individual trimming.

Consumer Audio Preamp Stage

Power Supply Enable Switch

Use Scenario: First-stage voltage amplification in battery-powered portable audio devices with 3.3 V supply rails.

IC Role / Device Role / Timing Role: Linear amplifier biased at I_C = 1 mA, V_CE = 1.5 V, operating in Class-A for low-noise performance.

Use Value: f_T = 170 MHz provides ample gain-bandwidth margin for 20 kHz audio bandwidth with stable phase response.

Use Scenario: Enabling/disabling 5 V auxiliary rails in embedded computing systems using microcontroller GPIO signals.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS gate drive or LDO EN pin with 50 µs turn-on/turn-off.

Use Value: Fast switching enabled by low C_cb (3 pF) and C_eb (40 pF), reducing propagation delay and minimizing shoot-through risk.

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
BC817-16W	V_CEO = 45 V, P_tot = 250 mW, same SOT-323 package, h_FE = 100–160, but higher V_CBO (50 V) and lower thermal resistance (R_thJS ≤ 80 K/W same).	Higher voltage headroom allows use in 24 V industrial systems where BC818K16W's 25 V rating is limiting.	Select BC817-16W when V_CEO > 25 V is required; otherwise, BC818K16WE6327HTSA1 offers tighter thermal spec for automotive ambient.
MMBT3904LT1G	V_CEO = 40 V, P_tot = 310 mW, SOT-23 package, h_FE = 100–300 (standard grade), no AEC-Q101 qualification.	Higher power rating and wider h_FE spread suit cost-sensitive consumer applications; lacks automotive qualification and thermal derating data.	Choose MMBT3904LT1G for non-automotive designs needing higher I_C headroom; avoid where AEC-Q101 compliance is mandatory.

Compared with BC817-16W and MMBT3904LT1G, BC818K16WE6327HTSA1 uniquely combines AEC-Q101 qualification, 25 V/500 mA rating optimized for 12 V automotive domains, and documented thermal behavior in SOT-323 - making it the preferred choice for safety-critical body electronics where reliability under thermal stress is non-negotiable.

Availability

BC818K16WE6327HTSA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, consumer audio preamplifiers, and power supply enable circuits requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BC818K16WE6327HTSA1 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, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The BC818K series belongs to Infineon's AEC-Q101-qualified discrete transistor portfolio, designed specifically for automotive body electronics, lighting, and comfort systems where robustness, thermal stability, and long-term parametric consistency are essential.

FAQ

Is BC818K16WE6327HTSA1 pin-compatible with BC817K16WE6327HTSA1?

No - both use SOT-323 packaging and share identical pinout (1=Base, 2=Emitter, 3=Collector), but BC818K16W has V_CEO = 25 V while BC817K16W has V_CEO = 45 V. Substitution requires verification of voltage margin in the target circuit; direct replacement may cause premature failure in 36 V or 48 V systems.

What is the maximum allowable base current for continuous operation?

The absolute maximum rated base current is I_B = 100 mA, but for reliable long-term operation at 25 °C, design should limit continuous I_B to ≤ 20 mA. At I_C = 500 mA, the recommended I_B is 50 mA per datasheet test condition - this is acceptable only for short-duration pulses with duty cycle < 10% and adequate thermal relief.

Does BC818K16WE6327HTSA1 support operation at 125 °C junction temperature?

No - the maximum rated junction temperature is T_j = 150 °C, but the device is characterized and guaranteed only up to T_j = 125 °C for h_FE and V_CE(sat) specifications. Operation above 125 °C requires derating of I_C and P_tot per the thermal curves in Figure 7, and lifetime reliability decreases significantly beyond 125 °C.

Can this transistor be used in RF matching networks above 10 MHz?

It is not recommended - although f_T = 170 MHz indicates theoretical small-signal gain at higher frequencies, the device lacks specified S-parameters, noise figure, or impedance matching data above 100 MHz. Its C_cb = 3 pF and C_eb = 40 pF introduce significant capacitive loading that degrades Q-factor and insertion loss in tuned RF circuits.

BC818K16WE6327HTSA1 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):: 25 V

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 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

BC818K16WE6327HTSA1 FAQ

1.How can I place an order for BC818K16WE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC818K16WE6327HTSA1 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 BC818K16WE6327HTSA1 reliable?

The price and inventory of BC818K16WE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC818K16WE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BC818K16WE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC818K16WE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC818K16WE6327HTSA1?

BC818K16WE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC818K16WE6327HTSA1 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 BC818K16WE6327HTSA1?

For technical support, including BC818K16WE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC818K16WE6327HTSA1 requirements.

6.How does Aetrix verify that BC818K16WE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BC818K16WE6327HTSA1 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 BC818K16WE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BC818K16WE6327HTSA1?

All BC818K16WE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC818K16WE6327HTSA1, 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 BC818K16WE6327HTSA1 part is unused and in its original packaging.

Return procedure for BC818K16WE6327HTSA1:

1.Submit a request within 90 days.

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

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