Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies BCX70HE6327HTSA1

Name: BCX70HE6327HTSA1
Brand: Infineon Technologies
SKU: BCX70HE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCX70HE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCX70HE6327HTSA1.pdf

Description:: TRANS NPN 45V 0.1A PG-SOT23

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,705

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCX70HE6327HTSA1 from Infineon Technologies is an NPN silicon small-signal transistor in SOT-23 package, designed for audio-frequency input stages and driver circuits. It delivers h_FE = 200–330 (at I_C = 2 mA, V_CE = 5 V), V_CEO = 45 V, V_CE(sat) ≤ 0.25 V (I_C = 50 mA, I_B = 1.25 mA), and low noise of 2 dB (f = 1 kHz, ∆f = 200 Hz, R_S = 2 kΩ), enabling high-fidelity preamplifier and line-driver applications.

For engineers reviewing the BCX70HE6327HTSA1 datasheet, BCX70HE6327HTSA1 pinout, BCX70HE6327HTSA1 application, or BCX70HE6327HTSA1 equivalent, key selection criteria include DC current gain group H, low V_CE(sat) at medium current, thermal resistance R_thJS ≤ 240 K/W, and AEC-Q101 qualification for automotive signal conditioning.

Technical Context

This transistor operates as a linear amplifying device with fixed-emitter bias topology in analog front-end stages. Its h-parameter set (h_21e = 260–330, h_11e = 3.6–4.5 kΩ, h_22e = 24–30 µS at I_C = 2 mA) supports stable small-signal voltage amplification with predictable input/output impedance matching.

Designed for operation up to T_j = 150 °C and qualified per AEC-Q101, it sustains reliable gain and saturation performance across automotive temperature ranges. The f_T = 250 MHz enables bandwidth margin beyond 15 kHz audio requirements while maintaining low C_cb = 0.95 pF and C_eb = 9 pF for minimal Miller effect.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Supports rail voltages up to ±22.5 V in split-supply audio stages without breakdown
h_FE (I_C = 2 mA)	260–330 - Ensures consistent bias point stability in Class-A preamp designs
V_CE(sat)	≤ 0.25 V @ I_C/I_B = 50/1.25 mA - Minimizes power loss and self-heating in driver output stages
f_T	250 MHz - Provides >16× headroom above 15 kHz audio band, preserving transient fidelity
Noise figure	2 dB @ 1 kHz - Meets low-noise requirement for microphone preamplifiers and sensor interfaces
R_thJS	≤ 240 K/W - Enables thermal design margin for continuous operation at P_tot = 330 mW up to T_S = 71 °C
C_cb	0.95 pF - Limits high-frequency feedback in common-emitter configurations

Pinout & Package

BCX70HE6327HTSA1 is housed in a RoHS-compliant SOT-23 plastic surface-mount package with standard lead frame geometry and gull-wing terminations.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Accepts base drive current to modulate collector current; requires series resistor for stable biasing
2 (Emitter)	Reference terminal for current source/sink	Connected to ground or emitter degeneration resistor; defines DC operating point
3 (Collector)	Output current terminal	Delivers amplified current to load; must be decoupled for RF stability in high-gain stages

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive ambient temperature range (−40 °C to +150 °C junction)
Low V_CE(sat)	0.25 V max at I_C = 50 mA ensures <12.5 mW dissipation in saturated switching
High h_FE consistency	Group H guarantees h_FE ≥ 260 at I_C = 2 mA, reducing binning dependency in production
Low-noise operation	2 dB noise figure at 1 kHz enables use in electret microphone biasing without added op-amp stage
Pb-free construction	RoHS-compliant materials meet EU Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles

Applications

Audio Preamp Stage

Automotive Sensor Interface

Use Scenario: Low-noise amplification of electret microphone output in infotainment head units.

IC Role / Device Role / Timing Role: NPN transconductance amplifier providing 20–30 dB voltage gain with DC-coupled bias.

Use Value: 2 dB noise figure and 260+ h_FE enable SNR > 65 dB without additional active filtering.

Use Scenario: Signal conditioning for resistive temperature sensors (RTDs) in engine coolant modules.

IC Role / Device Role / Timing Role: Current-source driver for constant-current excitation of 100 Ω Pt100 elements.

Use Value: Stable h_FE over −40 °C to +125 °C ensures <±0.5% gain drift across full automotive temperature range.

Line Driver Circuit

Industrial Analog Input

Use Scenario: Buffered output stage driving 600 Ω balanced audio lines in programmable logic controller (PLC) I/O modules.

IC Role / Device Role / Timing Role: Emitter-follower configured transistor delivering low-Z output with unity voltage gain.

Use Value: V_CE(sat) ≤ 0.25 V and R_thJS ≤ 240 K/W allow continuous 10 mA output into 600 Ω with <100 mW dissipation.

Use Scenario: Amplification of 4–20 mA loop signals in industrial process transmitters.

IC Role / Device Role / Timing Role: High-linearity small-signal amplifier in current-to-voltage conversion stage.

Use Value: f_T = 250 MHz and h_21e = 330 ensure <0.1% THD at 1 kHz and fast step response for 4–20 mA loop diagnostics.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BH6327XTSA1	V_CEO = 45 V, h_FE = 200–450 (group B), V_CE(sat) ≤ 0.25 V - wider h_FE spread, same package	Higher h_FE tolerance reduces need for emitter degeneration but increases sensitivity to thermal drift	Select when tighter production binning is not required and cost optimization is prioritized
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300 (standard grade), no AEC-Q101 qualification	Lacks automotive qualification and has lower V_CEO, limiting use to commercial-grade consumer audio	Choose only for non-automotive applications where AEC-Q101 compliance is unnecessary

Compared with BCX70HE6327HTSA1, BC847BH6327XTSA1 offers broader h_FE range but identical thermal and saturation specs, while MMBT3904LT1G trades AEC-Q101 validation and 5 V higher V_CEO for lower unit cost in non-automotive designs.

Availability

BCX70HE6327HTSA1 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial analog signal chains, and high-reliability audio equipment requiring stable component supply and AEC-Q101 traceability.

Supply support for BCX70HE6327HTSA1 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.

BCX70 belongs to Infineon's BCW/BCX family of general-purpose bipolar transistors engineered for high-reliability analog signal conditioning in automotive and industrial environments.

FAQ

What is the maximum continuous collector current for BCX70HE6327HTSA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 71 °C. At higher board temperatures, derating applies per the P_tot vs. T_S curve: at T_S = 100 °C, maximum I_C drops to approximately 65 mA to maintain junction temperature below 150 °C.

Is BCX70HE6327HTSA1 suitable for switching applications?

Yes - its V_CE(sat) ≤ 0.25 V at I_C/I_B = 50/1.25 mA and t_on/t_off < 50 ns (typical) support low-loss switching up to 100 kHz. However, it is optimized for linear operation; for high-speed digital switching, dedicated small-signal switches like BCP53 are preferred.

Does BCX70HE6327HTSA1 require external bias stabilization?

Yes - due to h_FE variation with temperature and current, emitter degeneration (e.g., 10–100 Ω resistor) and collector feedback biasing are recommended for stable Q-point in amplifier designs. The datasheet provides h_FE vs. I_C curves to guide bias network selection.

How does the AEC-Q101 qualification impact PCB layout for BCX70HE6327HTSA1?

AEC-Q101 qualification mandates validated thermal and mechanical robustness, but imposes no unique layout rules. Standard SOT-23 practices apply: minimize copper pour under the package, ensure ≥0.2 mm solder mask dam between pins, and route base/collector traces away from noisy power planes to preserve low-noise performance.

BCX70HE6327HTSA1 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:: Last Time Buy

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 550mV @ 1.25mA, 50mA

Current - Collector Cutoff (Max):: 20nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 180 @ 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

BCX70HE6327HTSA1 FAQ

1.How can I place an order for BCX70HE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX70HE6327HTSA1 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 BCX70HE6327HTSA1 reliable?

The price and inventory of BCX70HE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX70HE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCX70HE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX70HE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX70HE6327HTSA1?

BCX70HE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX70HE6327HTSA1 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 BCX70HE6327HTSA1?

For technical support, including BCX70HE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX70HE6327HTSA1 requirements.

6.How does Aetrix verify that BCX70HE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCX70HE6327HTSA1 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 BCX70HE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCX70HE6327HTSA1?

All BCX70HE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCX70HE6327HTSA1, 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 BCX70HE6327HTSA1 part is unused and in its original packaging.

Return procedure for BCX70HE6327HTSA1:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…