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

Infineon Technologies BC857CE6327HTSA1

Name: BC857CE6327HTSA1
Brand: Infineon Technologies
SKU: BC857CE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC857CE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC857CE6327HTSA1.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC857CE6327HTSA1 from Infineon Technologies is a PNP silicon small-signal transistor optimized for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 420–520 at I_C = 2 mA), low V_CE(sat) (≤300 mV at I_C = 10 mA, I_B = 0.5 mA), and low noise (F = 1–4 dB at 1 kHz), making it suitable for low-distortion preamplifier and level-shifting applications in automotive and industrial control modules.

For engineers reviewing the BC857CE6327HTSA1 datasheet, BC857CE6327HTSA1 pinout, BC857CE6327HTSA1 application, or BC857CE6327HTSA1 equivalent, key selection criteria include verified h_FE group C performance, SOT23 package thermal resistance (R_thJS ≤ 240 K/W), AEC-Q101 qualification, and complementary NPN pairing with BC847C/BC848C series.

Technical Context

This PNP bipolar junction transistor operates in linear amplification and saturated switching modes. Its design emphasizes low-noise analog performance across 30 Hz–15 kHz and stable DC gain across temperature (h_FE maintained ≥420 at I_C = 2 mA, T_A = 25°C) with tight grouping (h_FE-grp.C).

It features a maximum V_CEO of 45 V, V_CBO of 50 V, and V_EBO of 5 V - enabling use in 24 V rail systems with margin. The device meets AEC-Q101 stress testing for automotive under-hood environments and supports Pb-free (RoHS-compliant) reflow soldering per JEDEC J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - supports operation in 24 V automotive and industrial supply rails with safety margin
h_FE (I_C = 2 mA)	420–520 - enables high-gain, low-bias-current amplifier stages without external feedback trimming
V_CE(sat)	≤300 mV @ I_C = 10 mA, I_B = 0.5 mA - reduces conduction loss in active-load and level-shift driver configurations
f_T	250 MHz typ. - ensures stable gain and phase response up to mid-VHF, supporting wideband AF and control-loop compensation
Noise figure	1–4 dB @ 1 kHz, 0.2 mA - meets low-noise requirements for microphone preamps and sensor signal conditioning
R_thJS	≤240 K/W - allows continuous 100 mA operation at board-level T_S ≤ 71°C without forced cooling

Pinout & Package

BC857CE6327HTSA1 is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm × 1.0 mm), rated for reflow soldering and qualified per AEC-Q101. Pin 1 is Base, Pin 2 is Emitter, Pin 3 is Collector - consistent with JEDEC TO-236AB outline and compatible with automated pick-and-place placement.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Accepts forward bias current to enable controlled collector-emitter conduction; requires series resistor for stable DC biasing
2 (Emitter)	Common reference terminal	Connected to higher-potential rail in PNP common-emitter configuration; serves as return path for base and collector currents
3 (Collector)	Output current sink	Delivers amplified load current to ground-referenced loads; polarity inverted relative to base drive

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood operation (−40°C to +150°C junction, humidity, vibration, HTOL)
Low-noise AF performance	F = 1–4 dB at 1 kHz enables direct coupling in sensitive analog front-ends without added filtering
High h_FE group C	Guaranteed h_FE ≥420 at I_C = 2 mA ensures predictable gain in discrete amplifier designs
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260°C, 10 s)

Applications

Automotive Door Module Preamp

Industrial PLC Input Isolation

Use Scenario: Amplifying low-level analog signals from door latch position sensors before ADC sampling.

IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with DC-coupled input.

Use Value: Low 1–4 dB noise figure preserves SNR; h_FE ≥420 enables single-stage gain >100 without feedback network complexity.

Use Scenario: Level-shifting and buffering 24 V digital inputs to 3.3 V microcontroller GPIO pins.

IC Role / Device Role / Timing Role: Saturated PNP switch providing active-low open-collector interface with current limiting.

Use Value: V_CE(sat) ≤300 mV minimizes power dissipation during sustained ON-state; AEC-Q101 rating ensures reliability in factory-floor environments.

Medical Patient Monitor Sensor Interface

Consumer Audio Tone Control Circuit

Use Scenario: Conditioning weak bio-potential signals (ECG, EMG) in battery-powered portable monitors.

IC Role / Device Role / Timing Role: First-stage low-noise preamplifier with emitter-follower output buffer.

Use Value: Verified 30 Hz–15 kHz low-noise performance avoids signal degradation; SOT23 footprint saves PCB space in compact wearable form factors.

Use Scenario: Implementing passive-active tone stack (bass/treble) in headphone amplifiers and DAC output stages.

IC Role / Device Role / Timing Role: Discrete PNP gain stage with adjustable emitter degeneration for harmonic shaping.

Use Value: Tight h_FE group C (420–520) ensures consistent gain matching across stereo channels; f_T = 250 MHz supports clean transient response up to 20 kHz.

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
BC857B,315 (Nexperia)	h_FE = 220–475 (group B), R_thJS = 250 K/W, same SOT23 package	Lower guaranteed gain; less suitable for high-precision gain-critical preamps	Select when cost sensitivity outweighs need for h_FE ≥420; verify bias stability over temperature
MMBT3906LT1G (ON Semiconductor)	V_CEO = 40 V, h_FE = 100–300, R_thJS = 375 K/W, SOT23	Narrower voltage margin and lower max gain; higher thermal resistance limits power handling	Use only in non-automotive, low-power (<50 mA) applications where AEC-Q101 is not required

Compared with BC857B and MMBT3906LT1G, BC857CE6327HTSA1 provides superior gain consistency (h_FE ≥420), tighter noise performance (1–4 dB), and automotive-grade reliability - making it the preferred choice for precision analog and safety-critical signal conditioning.

Availability

BC857CE6327HTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and medical sensor signal conditioning requiring stable component supply and long-term lifecycle support.

Supply support for BC857CE6327HTSA1 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.

This part belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors, designed specifically for high-reliability analog signal processing and driver functions in harsh-environment automotive and industrial control systems.

FAQ

Is BC857CE6327HTSA1 pin-compatible with BC847C?

No - BC857C is PNP while BC847C is NPN; both share identical SOT23 pinout (1=Base, 2=Emitter, 3=Collector), but polarity reversal means circuit redesign is required for substitution. Direct replacement is electrically invalid without topology adjustment.

What is the maximum continuous collector current at 100°C ambient?

At T_A = 100°C, derating applies: P_tot = 330 mW at T_S ≤ 71°C, so maximum I_C is limited by V_CE × I_C ≤ 330 mW. With V_CE = 5 V, I_C ≤ 66 mA; actual safe operating current depends on PCB copper area and airflow.

Does this part support lead-free reflow soldering?

Yes - BC857CE6327HTSA1 is RoHS-compliant and qualified for lead-free reflow per JEDEC J-STD-020. Peak temperature tolerance is 260°C for 10 seconds; recommended profile follows IPC/JEDEC J-STD-020D with ramp rate ≤3°C/s and time above 217°C ≤ 60–150 s.

How does h_FE vary with collector current?

h_FE peaks near I_C = 2–10 mA (420–520 for group C), then declines at higher currents due to high-level injection effects. At I_C = 100 mA, h_FE drops to ~180–290; design must account for this roll-off in high-current driver stages.

BC857CE6327HTSA1 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:: PNP

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

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

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 420 @ 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

BC857CE6327HTSA1 FAQ

1.How can I place an order for BC857CE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC857CE6327HTSA1 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 BC857CE6327HTSA1 reliable?

The price and inventory of BC857CE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BC857CE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC857CE6327HTSA1?

BC857CE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC857CE6327HTSA1 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 BC857CE6327HTSA1?

For technical support, including BC857CE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CE6327HTSA1 requirements.

6.How does Aetrix verify that BC857CE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BC857CE6327HTSA1 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 BC857CE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BC857CE6327HTSA1?

All BC857CE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC857CE6327HTSA1, 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 BC857CE6327HTSA1 part is unused and in its original packaging.

Return procedure for BC857CE6327HTSA1:

1.Submit a request within 90 days.

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

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