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

Infineon Technologies BC 846A E6327

Name: BC 846A E6327
Brand: Infineon Technologies
SKU: BC 846A E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC 846A E6327

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC 846A E6327.pdf

Description:: TRANS NPN 65V 0.1A PG-SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC846A E6327 from Infineon Technologies is an NPN silicon general-purpose bipolar junction transistor (BJT) designed for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 110–220 at I_C = 10 µA–2 mA), low V_CE(sat) (≤250 mV at I_C = 10 mA, I_B = 0.5 mA), and low noise (F = 1.2–4 dB at 1 kHz), with V_CEO = 65 V and SOT23 package.

For engineers reviewing the BC846A E6327 datasheet, BC846A E6327 pinout, BC846A E6327 application, or BC846A E6327 equivalent, key selection criteria include its AEC-Q101 qualification for automotive use, RoHS-compliant Pb-free construction, and verified performance in low-noise preamplifier and switching driver roles across industrial and consumer electronics.

Technical Context

This NPN BJT operates in linear and saturated modes with defined breakdown limits: V_CEO = 65 V, V_CBO = 80 V, and V_EBO = 6 V. Its h_FE grouping (A-grade) ensures consistent current amplification across I_C = 10 µA to 2 mA, supporting stable biasing in discrete amplifier topologies.

Thermal design is enabled by R_thJS ≤ 240 K/W (SOT23), enabling continuous operation up to T_j = 150 °C. The device exhibits f_T = 250 MHz (typ.) and C_cb = 0.95 pF (typ.), confirming suitability for AF and low-MHz signal conditioning-not RF or high-speed switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	65 V - Supports rail voltages up to 48 V DC with safety margin in audio preamp and logic interface stages.
h_FE (min/typ/max)	110 / 200 / 420 at I_C = 10 µA, V_CE = 5 V - Ensures reliable small-signal amplification and predictable base drive requirements.
V_CE(sat)	≤250 mV at I_C = 10 mA, I_B = 0.5 mA - Minimizes conduction loss in low-power switching and active-load applications.
f_T	250 MHz (typ.) - Validates usable bandwidth for audio and sub-10 MHz analog signal paths without phase distortion.
Noise Figure	1.2–4 dB at I_C = 200 µA, f = 1 kHz - Confirmed low-noise performance for microphone preamps and sensor front-ends.
P_tot	330 mW at T_S ≤ 71 °C - Defines thermal derating envelope for PCB layout with standard copper pour in SOT23 footprint.

Pinout & Package

BC846A E6327 is housed in a standard SOT23 plastic surface-mount package (JEDEC TO-236AB), with 3 terminals: emitter, base, and collector. Pin 1 = emitter, Pin 2 = base, Pin 3 = collector - confirmed per Infineon's official marking and configuration diagram for BC846 series.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; sets reference for V_BE bias and defines common-emitter topology polarity.
Pin 2 (Base)	Control input	Receives current-limited drive (typically via resistor); controls collector current with h_FE-dependent linearity.
Pin 3 (Collector)	Output current source	Delivers amplified current to load; voltage swing limited by V_CEO and external supply rail.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics under stress conditions including temperature cycling and HTRB, enabling use in engine control and body modules.
Low V_CE(sat)	250 mV max at I_C/I_B = 20 - Reduces power dissipation in saturated-switch applications like LED drivers and relay interfaces.
RoHS-compliant Pb-free	Meets EU Directive 2011/65/EU - Eliminates lead in solder joint formation and supports lead-free reflow profiles (peak ≤ 260 °C).
Low-noise AF operation	F = 1.2 dB typ. at 1 kHz - Enables high-fidelity signal amplification in microphone biasing and audio codec front-ends.

Applications

Audio Preamplifier Stage

Automotive Sensor Interface

Use Scenario: Low-level signal amplification from electret microphones or piezoelectric sensors before ADC sampling.

IC Role / Device Role / Timing Role: NPN BJT configured as common-emitter amplifier with fixed bias network.

Use Value: Achieves ≥40 dB voltage gain with <4 dB noise figure at 1 kHz, preserving SNR in battery-powered voice recorders.

Use Scenario: Signal conditioning for resistive temperature sensors (e.g., NTC thermistors) in HVAC or coolant monitoring modules.

IC Role / Device Role / Timing Role: Discrete current-source driver for ratiometric bridge excitation and level-shifting into MCU ADC inputs.

Use Value: Stable h_FE and low V_CE(sat) ensure <±0.5% gain drift over −40°C to +125°C operating range.

Logic-Level Translator

LED Driver Switch

Use Scenario: Interfacing 3.3 V microcontroller GPIOs to 5 V or 12 V peripheral control lines.

IC Role / Device Role / Timing Role: Single-transistor level shifter in open-collector or push-pull configuration.

Use Value: Fast turn-on (t_on < 50 ns) and guaranteed saturation at I_B/I_C = 1/10 enable clean digital edge transitions without shoot-through.

Use Scenario: Driving indicator LEDs or low-current status lamps in industrial HMIs and dashboard panels.

IC Role / Device Role / Timing Role: Low-side switch with base resistor biasing and collector-connected LED anode.

Use Value: V_CE(sat) ≤ 250 mV minimizes heat generation at 20 mA LED current, eliminating need for heatsinking on FR4 PCBs.

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
BC846B E6327	Higher h_FE (200–450 min/typ/max at I_C = 2 mA) but identical V_CEO, V_CE(sat), and package.	Better suited for high-gain amplifier stages where precise gain matching is less critical than signal fidelity.	Select when higher current gain reduces required base drive current, easing MCU GPIO loading in low-power designs.
MMBT3904LT1G	Same V_CEO (60 V), lower h_FE (100–300), slightly higher V_CE(sat) (300 mV max), and identical SOT23 footprint.	More widely available in high-volume distribution channels but lacks AEC-Q101 qualification.	Prefer for cost-sensitive consumer applications where automotive reliability is not mandated.

Compared with BC846B E6327 and MMBT3904LT1G, BC846A E6327 offers the lowest guaranteed h_FE and best noise performance-making it optimal for precision low-noise amplification where gain consistency and signal integrity outweigh raw gain magnitude.

Availability

BC846A E6327 is available at Aetrix Electronics and suitable for audio preamplifiers, automotive sensor interfaces, and LED driver switches requiring stable component supply across production lifecycles.

Supply support for BC846A E6327 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 BC846A belongs to Infineon's BC846–BC850 family of AEC-Q101-qualified general-purpose NPN transistors, engineered for reliability in automotive signal conditioning and industrial analog front-ends.

FAQ

Is BC846A E6327 pin-compatible with BC846B E6327?

Yes - both share identical SOT23 package, pinout (E-B-C), and absolute maximum ratings. The only difference is h_FE grouping: BC846A specifies h_FE = 110–220, while BC846B specifies 200–450 at I_C = 2 mA. No PCB redesign is needed for substitution, though gain-dependent circuit behavior should be verified.

What is the maximum junction temperature and how does it affect thermal design?

The maximum junction temperature (T_j) is 150 °C. With R_thJS ≤ 240 K/W in SOT23, sustained power dissipation must stay below 330 mW at T_S ≤ 71 °C. For ambient temperatures above 70 °C, thermal derating is required - e.g., at T_A = 100 °C, P_tot must be reduced to ~150 mW using standard PCB copper area guidelines.

Does BC846A E6327 support pulsed operation beyond its DC power rating?

Yes - pulse operation is supported with duty cycle (D) and pulse width (t_p) constraints. At D = 0.01 and t_p = 100 µs, peak power can reach 5× DC rating (1.65 W). Pulse limits are defined in Infineon's Application Note AN2002-07, and require adherence to safe operating area (SOA) curves to avoid second breakdown.

Can BC846A E6327 replace BC546 in existing designs?

Yes - BC846A E6327 is a direct SOT23 drop-in replacement for through-hole BC546 (TO-92), sharing identical V_CEO = 65 V, h_FE grading, and electrical characteristics. Layout adaptation is required for SMT assembly, but no schematic or biasing changes are needed due to matched DC parameters and noise performance.

BC 846A E6327 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:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 65 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 110 @ 2mA, 5V

Power - Max:: 330 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BC 846A E6327 FAQ

1.How can I place an order for BC 846A E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC 846A E6327 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 BC 846A E6327 reliable?

The price and inventory of BC 846A E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC 846A E6327 is usually 5 days.

3.What payment methods are accepted for BC 846A E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC 846A E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC 846A E6327?

BC 846A E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC 846A E6327 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 BC 846A E6327?

For technical support, including BC 846A E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC 846A E6327 requirements.

6.How does Aetrix verify that BC 846A E6327 is sourced from the original manufacturer or authorized distributors?

All BC 846A E6327 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 BC 846A E6327 meets industry standards.

7.What is the process for return or replacement of BC 846A E6327?

All BC 846A E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BC 846A E6327, 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 BC 846A E6327 part is unused and in its original packaging.

Return procedure for BC 846A E6327:

1.Submit a request within 90 days.

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

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