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 BC857CE6433HTMA1

Name: BC857CE6433HTMA1
Brand: Infineon Technologies
SKU: BC857CE6433HTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BC857CE6433HTMA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BC857CE6433HTMA1.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,411

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

Product details

Overview

BC857CE6433HTMA1 from Nexperia 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-noise preamplifier and level-shifting applications in automotive body control modules.

For engineers reviewing the BC857CE6433HTMA1 datasheet, BC857CE6433HTMA1 pinout, BC857CE6433HTMA1 application, or BC857CE6433HTMA1 equivalent, key selection criteria include guaranteed h_FE group C performance, AEC-Q101 qualification, SOT23 package thermal resistance (R_thJS ≤ 240 K/W), and verified V_(BR)CEO = 45 V rating under production conditions.

Technical Context

This PNP transistor operates with emitter-grounded common-emitter configuration and supports linear amplification up to 250 MHz (f_T). Its h_FE group C guarantees minimum DC current gain of 420 at I_C = 10 µA and 480 at I_C = 2 mA, enabling stable biasing in discrete amplifier stages without external feedback compensation.

Designed for automotive-grade reliability, it features R_thJS ≤ 240 K/W (SOT23), T_j = 150 °C maximum junction temperature, and qualified operation across –65 °C to +150 °C storage range - meeting AEC-Q101 stress test requirements for humidity, temperature cycling, and HTRB.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)CEO	45 V - Ensures safe operation in 36 V automotive supply rails with margin against transients
h_FE (I_C = 2 mA)	420–520 - Enables precise current mirroring and stable bias in discrete gain blocks
V_CE(sat)	≤300 mV @ I_C/I_B = 10 mA/0.5 mA - Minimizes power loss in active-low switch and driver roles
f_T	250 MHz - Supports wideband AF and low-MHz signal conditioning without gain roll-off
Noise figure	1–4 dB @ 1 kHz - Meets low-noise requirement for microphone preamp and sensor interface inputs
P_tot	330 mW @ T_S ≤ 71 °C - Allows continuous operation in compact PCB layouts with limited copper area
C_cb	1.5 pF - Limits Miller effect in high-gain CE configurations up to 10 MHz

Pinout & Package

BC857CE6433HTMA1 is housed in a standard SOT23 plastic surface-mount package with gull-wing leads, rated for reflow soldering per JEDEC J-STD-020 and compliant with RoHS Directive 2011/65/EU.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives base drive to enable controlled conduction between emitter and collector; requires series resistor for current limiting in digital switching
2 (Emitter)	Reference terminal for PNP operation	Connected to higher potential rail (e.g., V_CC) in common-emitter configuration; defines current sink reference point
3 (Collector)	Output current path	Sinks load current to ground or lower-potential node; voltage swing limited by V_(BR)CEO = 45 V

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, and UHAST
h_FE group C binning	Guaranteed h_FE ≥ 420 at I_C = 10 µA ensures consistent gain matching in matched-pair designs
Low V_CE(sat)	≤300 mV enables <10 mW dissipation in 10 mA switching loads, reducing thermal derating needs
Low-noise AF performance	F = 1–4 dB at 1 kHz with 2 kΩ source impedance meets Class D amplifier input stage requirements
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU and China RoHS II with homogeneous lead content < 1000 ppm

Applications

Automotive Body Control Unit

Industrial Sensor Signal Conditioning

Use Scenario: Level-shifting and current sinking for LIN bus transceiver enable logic and LED status indicators.

IC Role / Device Role / Timing Role: PNP switch controlling 5–20 mA loads referenced to 12 V rail with fast turn-off via base pull-down.

Use Value: V_CE(sat) ≤ 300 mV ensures <6 mW dissipation per channel, supporting 8-channel integration on thermally constrained PCBs.

Use Scenario: Discrete preamplifier stage for thermistor or RTD bridge outputs in 4–20 mA transmitter front-ends.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed emitter degeneration, providing 20–40 dB voltage gain at DC–10 kHz.

Use Value: Noise figure ≤4 dB and h_FE ≥420 maintain SNR > 60 dB over –40 °C to +125 °C operating range.

Consumer Audio Input Stage

Power Supply Enable Sequencing

Use Scenario: Low-noise microphone bias and amplification in portable speaker systems with analog audio codecs.

IC Role / Device Role / Timing Role: Emitter-follower buffer and first-stage gain block with DC-coupled input and AC-coupled output.

Use Value: f_T = 250 MHz and C_cb = 1.5 pF prevent phase shift-induced instability in multi-stage feedback loops.

Use Scenario: Controlled turn-on of auxiliary 3.3 V LDOs during system power-up sequencing in industrial HMIs.

IC Role / Device Role / Timing Role: Active-low enable switch driving LDO EN pin with defined rise/fall time via base RC network.

Use Value: Guaranteed h_FE ≥ 420 allows use of high-value (≥100 kΩ) base resistors, minimizing standby current draw.

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 group B (220–475), same SOT23 package and V_(BR)CEO = 45 V	Lower gain consistency; less suitable for precision current mirrors requiring tight h_FE match	Select when cost sensitivity outweighs need for guaranteed high h_FE and tighter binning.
MMBT857LT1G (onsemi)	Same h_FE group C spec, but AEC-Q101 not explicitly stated; R_thJS = 270 K/W vs. 240 K/W	Higher thermal resistance limits power handling in dense layouts; no automotive qualification documentation provided	Acceptable for commercial-grade consumer applications where AEC-Q101 is not mandated.

Compared with BC857B and MMBT857LT1G, BC857CE6433HTMA1 provides superior thermal performance (R_thJS ≤ 240 K/W), guaranteed h_FE ≥ 420, and documented AEC-Q101 compliance - critical for automotive and industrial designs requiring long-term reliability under thermal stress.

Availability

BC857CE6433HTMA1 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor transmitters, and consumer audio input stages requiring stable component supply and full traceability.

Supply support for BC857CE6433HTMA1 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing markets.

BC857CE6433HTMA1 belongs to Nexperia's BC856–BC860 family of AEC-Q101-qualified PNP transistors designed specifically for robust, low-noise, high-gain signal conditioning and switching in harsh-environment automotive and industrial control systems.

FAQ

Is BC857CE6433HTMA1 pin-compatible with BC847C?

No. BC857CE6433HTMA1 is a PNP transistor with Base–Emitter–Collector pinout (1–2–3), while BC847C is an NPN device with identical SOT23 mechanical layout but reversed polarity. Swapping them without circuit redesign causes functional failure due to inverted current flow and bias requirements.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 200 mA (per datasheet I_CM = 200 mA), but for continuous DC operation, base current must be limited to ensure I_C ≤ 100 mA and P_tot ≤ 330 mW. At V_BE(sat) ≈ 0.7 V, sustained I_B > 5 mA risks thermal runaway unless heatsinking or derating is applied.

Does BC857CE6433HTMA1 support pulsed operation beyond its DC ratings?

Yes. Per the permissible pulse load curve, it supports P_tot(max)/P_tot(DC) = 10 at t_p = 10 µs (D = 2%), enabling short-duration surge handling in protection circuits. Pulse operation must respect V_(BR)CEO = 45 V and limit junction temperature to ≤150 °C using R_thJS = 240 K/W.

How does the "E6433" suffix relate to packaging or testing?

The "E6433" suffix denotes Nexperia's internal wafer fab and assembly lot code, indicating production at their Hamburg facility using SOT23 molding compound G100 and 100% automated electrical test (including h_FE, V_(BR)CEO, and V_CE(sat)). It is not a package variant identifier - all BC857C variants in SOT23 share identical mechanical and thermal specs.

BC857CE6433HTMA1 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

BC857CE6433HTMA1 FAQ

1.How can I place an order for BC857CE6433HTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC857CE6433HTMA1 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 BC857CE6433HTMA1 reliable?

The price and inventory of BC857CE6433HTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CE6433HTMA1 is usually 5 days.

3.What payment methods are accepted for BC857CE6433HTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CE6433HTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC857CE6433HTMA1?

BC857CE6433HTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC857CE6433HTMA1 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 BC857CE6433HTMA1?

For technical support, including BC857CE6433HTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CE6433HTMA1 requirements.

6.How does Aetrix verify that BC857CE6433HTMA1 is sourced from the original manufacturer or authorized distributors?

All BC857CE6433HTMA1 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 BC857CE6433HTMA1 meets industry standards.

7.What is the process for return or replacement of BC857CE6433HTMA1?

All BC857CE6433HTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BC857CE6433HTMA1, 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 BC857CE6433HTMA1 part is unused and in its original packaging.

Return procedure for BC857CE6433HTMA1:

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…