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

Infineon Technologies BC858BL3E6327

Name: BC858BL3E6327
Brand: Infineon Technologies
SKU: BC858BL3E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC858BL3E6327

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC858BL3E6327.pdf

Description:: TRANS PNP 30V 0.1A PG-SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC858BL3E6327 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It features V_CEO = 30 V, h_FE = 420–520 (at I_C = 2 mA), V_CE(sat) ≤ 300 mV (I_C = 10 mA, I_B = 0.5 mA), and low noise of 1 dB (f = 1 kHz, I_C = 0.2 mA). It is used in bias-stable amplifier front-ends for industrial sensor signal conditioning.

For engineers reviewing the BC858BL3E6327 datasheet, BC858BL3E6327 pinout, BC858BL3E6327 application, or BC858BL3E6327 equivalent, key selection criteria include guaranteed h_FE group C performance, AEC-Q101 qualification for automotive-grade reliability, SOT-323 package thermal resistance (R_thJS ≤ 60 K/W), and complementary pairing with BC848C NPN devices.

Technical Context

This transistor operates as a linear active-mode PNP switch or amplifier with fixed-emitter biasing topology. Its h_FE group C (min 420 at I_C = 2 mA) ensures consistent gain across production lots, while V_CE(sat) ≤ 300 mV enables low-loss switching in discrete logic level translators.

The device uses epitaxial base construction to achieve f_T = 250 MHz and C_cb = 1.5 pF, supporting stable operation up to 100 MHz with minimal Miller effect. Its 5 V V_EB0 rating allows direct connection to 3.3 V microcontroller GPIOs without external base clamping.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines safe operating range in 24 V rail interface circuits.
h_FE (I_C = 2 mA)	420–520 - Guaranteed DC current gain for group C; enables predictable bias point setting in emitter-follower buffers.
V_CE(sat)	≤300 mV - Low saturation voltage at I_C = 10 mA/I_B = 0.5 mA; reduces power loss in discrete load switches.
f_T	250 MHz - Transition frequency at I_C = 20 mA/V_CE = 5 V; supports RF pre-driver use up to 100 MHz.
C_cb	1.5 pF - Collector-base capacitance at V_CB = 10 V; limits high-frequency feedback in common-emitter amplifiers.
R_thJS	≤60 K/W - Junction-to-soldering-point thermal resistance; allows 250 mW dissipation at T_S ≤ 135 °C in SOT-323 layout.
Q101 Qualified	AEC-Q101 compliant - Validated for automotive temperature cycling, humidity, and mechanical shock per stress test standard.

Pinout & Package

BC858BL3E6327 is housed in a RoHS-compliant SOT-323 (SC-70) plastic surface-mount package with gull-wing leads and a 1.3 mm × 2.1 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives base drive current to modulate collector current; requires series resistor for digital GPIO interfacing.
2 (Emitter)	Reference terminal for current source/sink	Connected to higher potential rail in PNP configuration; establishes emitter voltage reference for bias stability.
3 (Collector)	Output current path	Delivers amplified/saturated output current to load; polarity inverted relative to base signal in common-emitter mode.

Key Features

Feature	Design Value
Low-noise audio operation	1 dB noise figure at I_C = 0.2 mA, enabling clean signal amplification in microphone preamps.
High h_FE consistency	Group C gain binning (420–520) ensures <±5% gain variation across batches for precision bias networks.
Automotive-grade reliability	AEC-Q101 qualification confirms suitability for under-hood temperature cycling (−40 °C to +125 °C junction).
Complementary NPN pairing	Designed as PNP counterpart to BC848C; matched V_CE(sat), h_FE, and f_T enable balanced push-pull drivers.

Applications

Audio Input Stage

Level Translation

Use Scenario: Amplifying weak signals from electret microphones in battery-powered voice recorders.

IC Role / Device Role / Timing Role: PNP common-emitter preamplifier with emitter-degeneration bias for gain stability.

Use Value: 1 dB noise figure and 420+ h_FE preserve SNR while enabling single-supply 3.3 V operation.

Use Scenario: Converting 1.8 V logic outputs to 5 V-compatible levels for legacy industrial I/O modules.

IC Role / Device Role / Timing Role: Discrete PNP level shifter in open-collector configuration with pull-up resistor.

Use Value: V_CE(sat) ≤ 300 mV ensures <0.3 V drop at 10 mA, maintaining valid HIGH-level margin for TTL inputs.

Current Sink Driver

Temperature-Stable Bias

Use Scenario: Driving LED indicators in automotive dashboard clusters requiring 10–20 mA sink current.

IC Role / Device Role / Timing Role: Saturated PNP switch controlling cathode-side LED current path.

Use Value: AEC-Q101 qualification and R_thJS ≤ 60 K/W support continuous 20 mA operation at 105 °C ambient.

Use Scenario: Setting precise quiescent current in Class-A op-amp output stages for instrumentation amplifiers.

IC Role / Device Role / Timing Role: Active current source using emitter-follower configuration with voltage reference input.

Use Value: Tight h_FE grouping minimizes current drift across temperature (±10% over −40 °C to +125 °C).

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC858BVL	Same SOT-323 package; h_FE group B (220–475); lower max f_T (100 MHz)	Lower gain consistency; unsuitable for precision bias where group C tolerance is required	Select when cost sensitivity outweighs gain stability needs in non-critical switching.
MMBT3906LT1G	Same SOT-23 package; h_FE 100–300; V_CEO = 40 V; not AEC-Q101 qualified	Larger footprint; lacks automotive qualification; higher V_CE(sat) (400 mV typical)	Choose only for non-automotive consumer designs where qualification is not mandated.

Compared with BC858BVL and MMBT3906LT1G, BC858BL3E6327 delivers superior gain consistency (group C), lower saturation voltage, and certified automotive reliability-making it optimal for safety-critical bias and driver functions where parameter drift must be minimized.

Availability

BC858BL3E6327 is available at Aetrix Electronics and suitable for automotive dashboard lighting control, industrial sensor signal conditioning, and portable audio preamplification requiring stable component supply and long-term lifecycle assurance.

Supply support for BC858BL3E6327 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 infrastructure.

BC858BL3E6327 belongs to the BC856–BC860 family of general-purpose PNP transistors engineered for high-reliability analog signal conditioning and discrete logic interfacing in automotive and industrial environments.

FAQ

What is the maximum allowable junction temperature for BC858BL3E6327?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Absolute Maximum Ratings table. Operation above this limit risks permanent degradation of h_FE and increased leakage. Derating is required above T_S = 135 °C, where total power dissipation drops linearly to zero at 150 °C.

Is BC858BL3E6327 pin-compatible with BC848C?

No-BC858BL3E6327 (PNP) and BC848C (NPN) share identical SOT-323 pinout (1=Base, 2=Emitter, 3=Collector), but their polarities are opposite. Direct substitution without circuit rework will cause functional failure; they are complementary, not interchangeable.

Does BC858BL3E6327 require external ESD protection in PCB layout?

No dedicated external ESD protection is required-the device meets HBM ESD rating of ±4 kV per AEC-Q101. However, layout best practices (short traces, ground plane proximity, and avoidance of floating nodes) remain essential to maintain that rating in system-level assembly.

Can BC858BL3E6327 operate in linear (active) mode at V_CE = 1 V?

Yes-its h_FE vs. I_C curves confirm stable DC current gain down to V_CE = 1 V. At I_C = 2 mA, h_FE remains ≥420 in this region, making it suitable for low-voltage linear regulators and active load applications with minimal headroom.

BC858BL3E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 650mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 15nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 220 @ 2mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BC858BL3E6327 FAQ

1.How can I place an order for BC858BL3E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC858BL3E6327 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 BC858BL3E6327 reliable?

The price and inventory of BC858BL3E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC858BL3E6327 is usually 5 days.

3.What payment methods are accepted for BC858BL3E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC858BL3E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC858BL3E6327?

BC858BL3E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC858BL3E6327 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 BC858BL3E6327?

For technical support, including BC858BL3E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC858BL3E6327 requirements.

6.How does Aetrix verify that BC858BL3E6327 is sourced from the original manufacturer or authorized distributors?

All BC858BL3E6327 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 BC858BL3E6327 meets industry standards.

7.What is the process for return or replacement of BC858BL3E6327?

All BC858BL3E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC858BL3E6327, 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 BC858BL3E6327 part is unused and in its original packaging.

Return procedure for BC858BL3E6327:

1.Submit a request within 90 days.

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

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