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 BC857BB5000

Name: BC857BB5000
Brand: Infineon Technologies
SKU: BC857BB5000
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BC857BB5000

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC857BB5000.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:270,000

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

Product details

Overview

BC857BB5000 from Nexperia is a PNP silicon small-signal transistor optimized for audio-frequency input stages and driver applications. It delivers high DC current gain (h_FE = 220–480 at I_C = 2 mA), low V_CE(sat) (max 250 mV at I_C = 10 mA/I_B = 0.5 mA), and low noise (1–4 dB NF at 1 kHz), enabling clean amplification in low-level analog signal paths.

For engineers reviewing the BC857BB5000 datasheet, BC857BB5000 pinout, BC857BB5000 application, or BC857BB5000 equivalent, key selection criteria include its SOT23 package compatibility, AEC-Q101 qualification status (not applicable to BC857BL3 variants), h_FE group B specification, and thermal resistance (R_thJS ≤ 240 K/W) for surface-mount thermal management.

Technical Context

This transistor operates as a linear PNP amplifier with complementary NPN pairing to BC847–BC850 series. Its design supports stable biasing across –65°C to +150°C storage and junction temperatures, with verified performance at V_CEO = 45 V, I_C = 100 mA, and f_T = 250 MHz (typ).

It features low C_cb (1.5 pF typ) and C_eb (8 pF typ) for minimal Miller effect in high-gain configurations, and h_21e = 330 (typ) at 1 kHz confirms strong forward current transfer in small-signal switching and amplification roles.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Supports rail-to-rail operation up to ±45 V supply in discrete amplifier stages
h_FE (I_C = 2 mA)	220–480 - Enables precise bias stability and predictable gain in emitter-follower or common-emitter topologies
V_CE(sat)	250 mV max - Minimizes conduction loss in active-load and level-shifting driver circuits
f_T	250 MHz typ - Ensures usable bandwidth beyond audio range into low-MHz signal conditioning
Noise Figure	1–4 dB - Critical for low-noise preamplifier front-ends in sensor interfaces and microphone inputs
R_thJS	≤240 K/W - Allows direct PCB copper pour thermal relief without heatsink in space-constrained SMT layouts
P_tot	330 mW @ T_S ≤ 71°C - Defines maximum continuous power handling under standard board thermal conditions

Pinout & Package

BC857BB5000 is housed in a standard SOT23 plastic surface-mount package (3.15 × 1.9 × 1.15 mm), with gull-wing leads and moisture sensitivity level (MSL) 1 per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to higher-potential rail in PNP configuration; defines reference for base bias network
2 (Base)	Control input	Receives current-limited drive to regulate collector current; requires series resistor for stable biasing
3 (Collector)	Output current source	Delivers amplified current to load; polarity inverted relative to base input in common-emitter mode

Key Features

Feature	Design Value
High h_FE group B	Guaranteed 220–480 at I_C = 2 mA enables consistent gain matching in dual-transistor circuits
Low V_CE(sat)	250 mV max reduces voltage headroom loss in battery-powered audio drivers and logic-level shifters
Low-noise operation	1–4 dB NF at 1 kHz supports high-fidelity signal amplification without added filtering complexity
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements (excluding BC857BL3 variant)
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU and IPC/JEDEC J-STD-020 MSL-1 reflow profile compatibility

Applications

Audio Preamp Stage

Level-Shifting Driver

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling.

IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with fixed-emitter bias.

Use Value: Low noise (1–4 dB) and high h_FE ensure SNR preservation without requiring additional op-amp stages.

Use Scenario: Translating 3.3 V logic outputs to 5 V or 12 V loads in industrial I/O modules.

IC Role / Device Role / Timing Role: Active pull-up switch in open-collector interface circuits.

Use Value: V_CE(sat) ≤ 250 mV minimizes voltage drop, ensuring full rail delivery to downstream TTL/CMOS inputs.

Complementary Pair Amplifier

Automotive Sensor Interface

Use Scenario: Building Class AB output stages with matched BC847B (NPN) for low-distortion audio buffering.

IC Role / Device Role / Timing Role: Upper leg of push-pull pair delivering current during positive half-cycle.

Use Value: Tight h_FE grouping (B grade) and thermal symmetry with BC847B enable balanced crossover behavior.

Use Scenario: Conditioning thermistor or potentiometer signals in engine control units (ECUs) and cabin climate systems.

IC Role / Device Role / Timing Role: Signal buffer isolating sensitive analog sensors from noisy digital domains.

Use Value: AEC-Q101 qualification and 150°C junction rating support reliable operation in under-hood environments.

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
BC857BW	SOT323 package (smaller footprint), R_thJS ≤ 250 K/W, not AEC-Q101 qualified	Preferred for ultra-dense PCBs where SOT23 real estate is constrained	Select when board area is critical and automotive qualification is not required
MMBT3906	Higher V_CEO (40 V), lower h_FE (100–300), same SOT23 package, AEC-Q101 qualified	Better suited for general-purpose switching than low-noise amplification	Choose when robustness in digital logic interfacing outweighs audio fidelity needs

Compared with BC857BW and MMBT3906, BC857BB5000 offers superior noise performance and tighter h_FE grouping-making it optimal for precision analog front-ends-while retaining SOT23 compatibility and AEC-Q101 compliance for automotive-grade designs.

Availability

BC857BB5000 is available at Aetrix Electronics and suitable for audio preamplifiers, industrial level-shifters, and automotive sensor interfaces requiring stable component supply and long-term manufacturability.

Supply support for BC857BB5000 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

Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, with leadership in logic, discrete, and MOSFET technologies.

BC857BB5000 belongs to Nexperia's BC847–BC860 family of general-purpose bipolar transistors, engineered for high-reliability analog signal conditioning and driver functions in automotive, industrial, and consumer electronics.

FAQ

What is the maximum operating temperature for BC857BB5000?

The BC857BB5000 has a maximum junction temperature (T_j) of 150°C and a storage temperature range of –65°C to +150°C. Its thermal resistance R_thJS is ≤240 K/W, meaning it can sustain continuous operation at full rated power only if the solder-point temperature remains ≤71°C per the derating curve.

Is BC857BB5000 pin-compatible with BC847B?

Yes-BC857BB5000 (PNP) and BC847B (NPN) share identical SOT23 pinout (Emitter-Base-Collector on pins 1-2-3) and mechanical footprint, enabling direct complementary placement in push-pull or differential amplifier layouts without layout revision.

Does BC857BB5000 require external biasing components?

Yes-this is a bare transistor requiring external base resistors for current-controlled biasing. Typical configurations include fixed-base, voltage-divider, or emitter-degenerated topologies. No integrated bias network or protection diodes are present on-die.

How does BC857BB5000 differ from BC857BL3?

BC857BB5000 uses the standard SOT23 package and is AEC-Q101 qualified; BC857BL3 uses the smaller TSLP-3-1 package, has lower power dissipation (250 mW), and is explicitly marked "not qualified according AEC Q101" per the datasheet.

BC857BB5000 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Bulk

Product Status:: Active

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:: 220 @ 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

BC857BB5000 FAQ

1.How can I place an order for BC857BB5000 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC857BB5000 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 BC857BB5000 reliable?

The price and inventory of BC857BB5000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857BB5000 is usually 5 days.

3.What payment methods are accepted for BC857BB5000?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857BB5000 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC857BB5000?

BC857BB5000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC857BB5000 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 BC857BB5000?

For technical support, including BC857BB5000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857BB5000 requirements.

6.How does Aetrix verify that BC857BB5000 is sourced from the original manufacturer or authorized distributors?

All BC857BB5000 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 BC857BB5000 meets industry standards.

7.What is the process for return or replacement of BC857BB5000?

All BC857BB5000 units undergo pre-shipment inspection (PSI). If there is an issue with BC857BB5000, 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 BC857BB5000 part is unused and in its original packaging.

Return procedure for BC857BB5000:

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…