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

Infineon Technologies BC808-40WE6327

Name: BC808-40WE6327
Brand: Infineon Technologies
SKU: BC808-40WE6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC808-40WE6327

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BC808-40WE6327.pdf

Description:: TRANS PNP 25V 0.5A PG-SOT23-3-11

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC808-40WE6327 from Infineon Technologies is a PNP silicon general-purpose audio-frequency transistor in SOT323 package, rated for 25 V V_CEO, 500 mA I_C, and 250 mW P_tot at T_S ≤ 130 °C, with h_FE = 250–630 (IC = 100 mA, V_CE = 1 V), V_CE(sat) ≤ 0.7 V (IC = 500 mA, IB = 50 mA), and f_T = 200 MHz - used in low-voltage switching and linear amplification stages of automotive body control modules.

For engineers reviewing the BC808-40WE6327 datasheet, BC808-40WE6327 pinout, BC808-40WE6327 application, or BC808-40WE6327 equivalent, key selection criteria include guaranteed h_FE group 40 performance across temperature, RoHS-compliant SOT323 thermal resistance (R_thJS ≤ 80 K/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a medium-power PNP bipolar junction transistor optimized for linear amplification and saturated switching in DC-coupled or low-frequency AC circuits. Its design emphasizes high current gain consistency (h_FE min 250 at 100 mA), low saturation voltage under heavy drive (V_CE(sat) ≤ 0.7 V), and stable cutoff behavior (I_CBO ≤ 0.1 µA at 25 °C).

The BC808-40WE6327 shares pinout and footprint compatibility with complementary NPN BC818-40W, enabling balanced push-pull designs. Its SOT323 package supports surface-mount reflow assembly while delivering R_thJS ≤ 80 K/W - critical for thermally constrained PCB layouts in space-constrained automotive ECUs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 12 V automotive supply rails.
I_C	500 mA - Continuous collector current rating; supports driving small relays or LED arrays without external heat sinking.
h_FE	250–630 - Guaranteed DC current gain group 40; ensures predictable base drive requirements across production lots and temperatures.
V_CE(sat)	≤ 0.7 V @ IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes power loss and self-heating in switching applications.
f_T	200 MHz - Transition frequency enables stable operation up to mid-audio frequencies (e.g., <100 kHz amplifier stages) with margin.
R_thJS	≤ 80 K/W - Junction-to-soldering-point thermal resistance; allows direct thermal modeling for board-level thermal management.
AEC-Q101	Qualified - Meets stress-test requirements for automotive electronics, including temperature cycling and HTRB.

Pinout & Package

BC808-40WE6327 uses the SOT323 (SC-70) plastic surface-mount package - 3-pin, 1.3 mm × 2.1 mm footprint, 0.95 mm height, gull-wing leads - optimized for automated placement and reflow soldering in high-density PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to higher potential rail in PNP common-emitter configurations.
2 (Base)	B	Control input; requires ~50 mA drive for full saturation at 500 mA collector load.
3 (Collector)	C	Output node; ties to load (e.g., relay coil or LED anode) and ground return path.

Key Features

Feature	Design Value
High h_FE group 40	Guaranteed 250–630 gain at 100 mA ensures consistent biasing and reduced base drive circuit complexity.
Low V_CE(sat)	≤ 0.7 V at full rated current lowers conduction losses and improves efficiency in battery-powered switches.
AEC-Q101 qualified	Validated for automotive under-hood environments, including 1000-hour HTOL and -40 °C to +125 °C operational range.
SOT323 thermal performance	R_thJS ≤ 80 K/W enables reliable 250 mW dissipation without heatsink in compact ECU modules.

Applications

Automotive Door Module Switching

Industrial Sensor Signal Conditioning

Use Scenario: Driving window lift motor enable logic and mirror fold/unfold relays in door control units.

IC Role / Device Role / Timing Role: PNP switch controlling 12 V relay coils with 500 mA peak load and fast turn-off via base pull-down.

Use Value: V_CE(sat) ≤ 0.7 V limits power loss to <350 mW during activation, reducing thermal stress on adjacent MCU pins.

Use Scenario: Amplifying low-level analog outputs (e.g., 0–100 mV) from strain-gauge pressure sensors in HVAC actuators.

IC Role / Device Role / Timing Role: Linear amplifier in common-emitter configuration with emitter degeneration resistor for DC stability.

Use Value: h_FE ≥ 250 ensures minimal base current error (<0.2% of collector current), preserving signal fidelity.

LED Driver for Dashboard Backlight

Power Supply Enable Control

Use Scenario: Current-switching driver for white LED strings (3× LEDs, 20 mA each) in instrument cluster backlighting.

IC Role / Device Role / Timing Role: Saturated PNP switch turning on LED cathodes connected to regulated 5 V rail.

Use Value: 500 mA I_C rating provides 10× headroom over required 20 mA, ensuring long-term reliability under voltage transients.

Use Scenario: Enabling/disabling secondary 3.3 V LDO output in multi-rail automotive power management ICs.

IC Role / Device Role / Timing Role: High-side enable switch controlled by microcontroller GPIO with open-drain interface.

Use Value: Complementary pairing with BC818-40W allows matched gain and timing in dual-rail sequencing circuits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP transistor switching and amplification applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC808-40LT1G	Same h_FE group and V_CEO, but SOT23 package (R_thJS ≤ 215 K/W) and no AEC-Q101 qualification.	Not suitable for automotive under-hood use; acceptable for industrial control panels with lower ambient temps.	Select when cost sensitivity outweighs thermal or qualification requirements.
MMBT4403	Lower h_FE (min 100), same V_CEO (25 V), but higher V_CE(sat) (≤ 0.75 V) and no AEC-Q101 certification.	Limited to non-safety-critical consumer electronics; insufficient gain margin for precision sensor biasing.	Choose only for legacy designs where footprint compatibility is prioritized over gain stability.

Compared with BC808-40LT1G and MMBT4403, BC808-40WE6327 delivers superior thermal performance (80 vs. 215 K/W), guaranteed high h_FE, and automotive qualification - making it the only option for thermally demanding, safety-relevant vehicle subsystems.

Availability

BC808-40WE6327 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and LED lighting control requiring stable component supply and AEC-Q101 compliance.

Supply support for BC808-40WE6327 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.

BC808-40WE6327 belongs to Infineon's BC807/BC808 family - engineered for robust, high-gain PNP switching in automotive and industrial environments where reliability under thermal stress is critical.

FAQ

Is BC808-40WE6327 pin-compatible with BC808-40W?

Yes - both share identical SOT323 package, pinout (E-B-C), and electrical specifications. The "E6327" suffix denotes tape-and-reel packaging per JEDEC standard J-STD-020, with no functional difference from "W" variants.

What is the maximum operating temperature for continuous operation?

The device supports continuous operation up to T_j = 150 °C. At ambient temperatures above 85 °C, derating applies: P_tot decreases linearly from 250 mW at T_S = 130 °C to zero at 150 °C junction temperature.

Can BC808-40WE6327 replace BC807-40W in a circuit?

No - BC807-40W has V_CEO = 45 V and V_CBO = 50 V, while BC808-40WE6327 is rated for 25 V and 30 V respectively. Substitution risks premature breakdown in 36 V or 48 V systems.

Does this part support lead-free reflow profiles?

Yes - BC808-40WE6327 is RoHS-compliant and qualified for standard Pb-free reflow (JEDEC J-STD-020, peak 260 °C, 20–40 sec), with moisture sensitivity level (MSL) 1 - unlimited floor life at ≤30 °C/60% RH.

BC808-40WE6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

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:: 250 @ 100mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23-3-11

BC808-40WE6327 FAQ

1.How can I place an order for BC808-40WE6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC808-40WE6327 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 BC808-40WE6327 reliable?

The price and inventory of BC808-40WE6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC808-40WE6327 is usually 5 days.

3.What payment methods are accepted for BC808-40WE6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC808-40WE6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC808-40WE6327?

BC808-40WE6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC808-40WE6327 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 BC808-40WE6327?

For technical support, including BC808-40WE6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC808-40WE6327 requirements.

6.How does Aetrix verify that BC808-40WE6327 is sourced from the original manufacturer or authorized distributors?

All BC808-40WE6327 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 BC808-40WE6327 meets industry standards.

7.What is the process for return or replacement of BC808-40WE6327?

All BC808-40WE6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC808-40WE6327, 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 BC808-40WE6327 part is unused and in its original packaging.

Return procedure for BC808-40WE6327:

1.Submit a request within 90 days.

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

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