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

Infineon Technologies BCX70JE6327HTSA1

Name: BCX70JE6327HTSA1
Brand: Infineon Technologies
SKU: BCX70JE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX70JE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCX70JE6327HTSA1.pdf

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

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Product details

Overview

BCX70JE6327HTSA1 from Infineon Technologies is an NPN silicon small-signal transistor designed for audio-frequency input stages and driver applications. It delivers h_FE = 250–500 (at I_C = 10 µA, 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 F = 2 dB (I_C = 200 µA, f = 1 kHz, ∆f = 200 Hz, R_S = 2 kΩ). It is used in compact audio preamplifier gain blocks.

For engineers reviewing the BCX70JE6327HTSA1 datasheet, BCX70JE6327HTSA1 pinout, BCX70JE6327HTSA1 application, or BCX70JE6327HTSA1 equivalent, key selection criteria include DC current gain group J specification, SOT23 package thermal limits (R_thJS ≤ 240 K/W), low-noise AF performance up to 15 kHz, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This transistor operates as a linear amplifying device in Class-A or Class-AB small-signal stages, with verified h-parameter set (h_21e = 330–520, h_11e = 4.5–7.5 kΩ at I_C = 2 mA, V_CE = 5 V, f = 1 kHz) and transition frequency f_T = 250 MHz. Its low V_CE(sat) and high h_FE support efficient biasing in low-voltage, low-power analog signal chains.

The BCX70J variant belongs to the BCW60/BCX70 family's high-gain, low-noise subgroup (J/K), with complementary PNP BCX71J available. It meets AEC-Q101 stress testing requirements for automotive electronics and features Pb-free RoHS-compliant packaging.

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 = 10 µA)	250–500 - enables stable low-current biasing in high-impedance microphone preamp inputs
V_CE(sat)	≤ 0.25 V @ I_C = 50 mA - minimizes power loss and self-heating in driver-stage switching
f_T	250 MHz - ensures sufficient gain margin beyond audio band, supporting wideband stability
F (Noise Figure)	2 dB @ I_C = 200 µA - meets low-noise requirement for 30 Hz–15 kHz audio front-ends
R_thJS	≤ 240 K/W - defines maximum junction-to-solder-point thermal resistance for PCB layout derating
P_tot	330 mW @ T_S ≤ 71 °C - sets continuous power limit under defined board thermal conditions

Pinout & Package

BCX70JE6327HTSA1 is housed in a standard SOT23 (TO-236) plastic surface-mount package with 3-pin configuration and gull-wing leads. The package supports automated placement and reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or negative rail in common-emitter amplifier configurations
2 (Base)	Control input	Receives bias current to modulate collector current; requires series resistor for stable DC setting
3 (Collector)	Current source output	Drives load or next stage; voltage swing limited by V_CEO = 45 V rating

Key Features

Feature	Design Value
High DC current gain group J	h_FE = 250–500 at I_C = 10 µA - reduces base drive requirements in low-power sensor interfaces
Low collector-emitter saturation voltage	V_CE(sat) ≤ 0.25 V @ I_C = 50 mA - improves efficiency in active-load and switch-mode driver circuits
Low noise performance	F = 2 dB @ 1 kHz - enables use in sensitive audio preamplifiers without added noise floor degradation
AEC-Q101 qualified	Qualified for automotive electronic systems - supports deployment in infotainment and body control modules
Pb-free RoHS compliance	Meets EU Directive 2011/65/EU - eliminates lead in solder joint and package materials

Applications

Audio Preamp Stage

Automotive Door Module Driver

Use Scenario: Amplifying low-level signals from electret microphones in vehicle cabin voice capture systems.

IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter topology with emitter degeneration for linearity.

Use Value: 2 dB noise figure and 250–500 h_FE ensure clean signal gain before ADC sampling without introducing audible hiss.

Use Scenario: Driving LED indicators and small solenoids in door lock/unlock actuation circuits.

IC Role / Device Role / Timing Role: Switching transistor controlling 50 mA loads from MCU GPIO pins.

Use Value: V_CE(sat) ≤ 0.25 V minimizes power dissipation and heat rise in space-constrained door modules.

Industrial Sensor Interface

Consumer Audio Line Driver

Use Scenario: Buffering and level-shifting analog outputs from temperature or pressure sensors to PLC inputs.

IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance.

Use Value: h_FE ≥ 250 ensures minimal loading on high-impedance sensor sources across temperature range.

Use Scenario: Output stage in portable headphone amplifiers delivering 10–20 mW into 32 Ω loads.

IC Role / Device Role / Timing Role: Class-A gain block operating at I_C ≈ 2 mA with V_CE = 5 V for low-distortion linearity.

Use Value: f_T = 250 MHz provides ample bandwidth margin for THD control up to 20 kHz.

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
BCX70K	h_FE = 350–630 (higher gain group); same V_CEO, V_CE(sat), and package	Preferred where tighter gain tolerance or higher loop gain is needed in feedback amplifiers	Select BCX70K when design requires >500 h_FE minimum at low I_C; verify stability with increased β
BC847BJ	Same SOT23 package; h_FE = 200–450 (group B/J), but lower V_CEO = 45 V (same), no AEC-Q101 qualification	Used in commercial-grade consumer electronics where automotive qualification is not required	Choose BC847BJ for cost-sensitive non-automotive designs; avoid in safety-critical or temperature-cycled environments

Compared with BCX70K and BC847BJ, BCX70JE6327HTSA1 uniquely combines AEC-Q101 qualification, guaranteed h_FE ≥ 250 at 10 µA, and 2 dB noise figure-making it optimal for automotive audio front-ends requiring both reliability and signal fidelity.

Availability

BCX70JE6327HTSA1 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor signal conditioning, and portable audio equipment requiring stable component supply and long-term manufacturability.

Supply support for BCX70JE6327HTSA1 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 BCX70 series belongs to Infineon's AEC-Q101-qualified small-signal transistor product line, engineered for reliable operation in automotive audio, body electronics, and sensor interface applications under extended temperature and vibration stress.

FAQ

What is the maximum operating junction temperature for BCX70JE6327HTSA1?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Absolute Maximum Ratings table. Operation above this temperature risks permanent degradation of h_FE and increased leakage. Derating is required above T_S = 71 °C to maintain P_tot ≤ 330 mW, per the thermal resistance curve (R_thJS ≤ 240 K/W).

Is BCX70JE6327HTSA1 pin-compatible with BC847 series transistors?

Yes-both use the SOT23 package with identical pinout (Emitter-Base-Collector on pins 1-2-3). However, BCX70J has higher V_CEO (45 V vs. 45 V for BC847B/C), tighter h_FE grouping, and AEC-Q101 qualification. Electrical substitution is possible only if gain, noise, and qualification requirements align.

Does BCX70JE6327HTSA1 support pulsed operation beyond its DC power rating?

Yes-the permissible pulse load chart shows P_tot(max)/P_tot(DC) ratio up to 5× for pulse widths < 100 µs (duty cycle D < 2%). For example, 1.65 W peak power is allowed for t_p = 10 µs pulses, provided average power remains within 330 mW limits and thermal mass prevents junction overheating.

How does the noise performance of BCX70JE6327HTSA1 compare across different h_FE groups?

Noise figure is specified only for h_FE group FF (F = 2 dB), but test data shows consistent low-noise behavior across J/K groups due to shared epitaxial process and geometry. Measured V_n = 0.135 µV (10–50 Hz) confirms suitability for sub-100 µV signal amplification regardless of h_FE subgroup.

BCX70JE6327HTSA1 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:: 250 @ 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

BCX70JE6327HTSA1 FAQ

1.How can I place an order for BCX70JE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX70JE6327HTSA1 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 BCX70JE6327HTSA1 reliable?

The price and inventory of BCX70JE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX70JE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCX70JE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX70JE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX70JE6327HTSA1?

BCX70JE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX70JE6327HTSA1 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 BCX70JE6327HTSA1?

For technical support, including BCX70JE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX70JE6327HTSA1 requirements.

6.How does Aetrix verify that BCX70JE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCX70JE6327HTSA1 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 BCX70JE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCX70JE6327HTSA1?

All BCX70JE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCX70JE6327HTSA1, 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 BCX70JE6327HTSA1 part is unused and in its original packaging.

Return procedure for BCX70JE6327HTSA1:

1.Submit a request within 90 days.

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

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