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Infineon Technologies BC 846B E6433
- Part No.:
- BC 846B E6433
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC 846B E6433.pdf
- Description:
- TRANS NPN 65V 0.1A PG-SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
BC846B E6433 from Nexperia is an NPN silicon general-purpose bipolar junction transistor designed for audio-frequency input stages and driver applications. It delivers high DC current gain (hFE = 200–450 at IC = 2 mA), low VCE(sat) (max 250 mV at IC = 10 mA / IB = 0.5 mA), and low noise (F = 1.2–4 dB at 1 kHz), meeting AEC-Q101 qualification for automotive use.
For engineers reviewing the BC846B E6433 datasheet, BC846B E6433 pinout, BC846B E6433 application, or BC846B E6433 equivalent, key selection criteria include its SOT23 package compatibility, guaranteed hFE group B performance, RoHS-compliant Pb-free construction, and thermal resistance (RthJS ≤ 240 K/W) under TS ≤ 71 °C conditions.
Technical Context
The BC846B operates as a medium-speed, low-noise NPN amplifier/driver with fT = 250 MHz at IC = 10 mA and VCE = 5 V. Its hFE is specified across two test points (IC = 10 µA and 2 mA), supporting both biasing stability and switching linearity.
It features complementary PNP counterparts (BC856–BC860 series), enabling push-pull stage design. The device's Ccb = 0.95 pF and Ceb = 9 pF support stable AF bandwidth up to 15 kHz with minimal Miller effect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - supports rail voltages up to 48 V in automotive signal conditioning without breakdown |
| hFE (IC = 2 mA) | 200–450 - ensures reliable current amplification in low-power preamp and level-shifting circuits |
| VCE(sat) | ≤ 250 mV - minimizes conduction loss in active-load and switch-mode driver configurations |
| fT | 250 MHz - enables stable operation in wideband AF amplifiers and fast-switching digital interfaces |
| Noise figure | 1.2–4 dB - meets low-noise requirements for microphone preamps and sensor signal chains |
| RthJS | ≤ 240 K/W - defines maximum junction-to-solder-point thermal rise under continuous 330 mW dissipation |
Pinout & Package
BC846B E6433 is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm × 1.0 mm), optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Provides low-impedance return path; tied to ground or negative rail in common-emitter configuration |
| 2 (Base) | Control input | Accepts bias current to regulate collector current; requires current-limiting resistor in discrete driver designs |
| 3 (Collector) | Current source terminal | Delivers amplified output current; connected to load or next-stage input via pull-up or active termination |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements (HTOL, TC, HTRB), enabling use in engine control and body modules |
| Pb-free (RoHS compliant) | Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C) |
| Low VCE(sat) | 250 mV max at IC/IB = 10 mA/0.5 mA - reduces power loss and self-heating in battery-powered drivers |
| High hFE consistency | Group B binning (200–450) ensures predictable gain matching across production lots for analog feedback loops |
Applications
| Audio Pre-amplifier Stage | Automotive Door Module Driver |
|---|---|
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: Low-noise NPN small-signal amplifier in common-emitter topology with emitter degeneration. Use Value: Achieves 1.2 dB noise figure at 1 kHz, preserving SNR in voice-recognition systems operating at 200 µA collector bias. | Use Scenario: Driving LED indicators and small solenoids in vehicle door control units. IC Role / Device Role / Timing Role: Medium-current switch controlling 20–50 mA loads from MCU GPIO pins. Use Value: Delivers <250 mV saturation voltage at 10 mA drive, minimizing heat generation in thermally constrained plastic housings. |
| Industrial Sensor Signal Conditioning | Consumer Appliance Power Sequencing |
Use Scenario: Level-shifting and buffering analog outputs from temperature or pressure transducers. IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance. Use Value: Maintains hFE ≥ 200 at IC = 10 µA, ensuring stable DC gain over -40 °C to +125 °C ambient range. | Use Scenario: Enabling/disabling auxiliary power rails during startup and fault recovery in smart home hubs. IC Role / Device Role / Timing Role: Discrete load switch controlled by microcontroller reset logic. Use Value: Withstands VCEO = 65 V and operates reliably at Tj = 150 °C, supporting robust sequencing under brown-out conditions. |
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 |
|---|---|---|---|
| BC846BW | SOT323 package (smaller footprint); RthJS ≤ 240 K/W but lower Ptot = 250 mW at TS ≤ 124 °C | Better suited for space-constrained portable devices where thermal mass is limited | Select when board area is critical and peak dissipation remains below 200 mW |
| MMBT3904LT1G | Higher VCEO = 40 V; hFE = 100–300 (no group B binning); fT = 300 MHz | Preferred in high-speed digital interface applications requiring faster edge rates | Choose when higher transition frequency outweighs need for low-noise AF performance |
Compared with BC846BW and MMBT3904LT1G, BC846B E6433 offers superior noise performance and tighter hFE grouping for precision analog stages, while maintaining full AEC-Q101 compliance and SOT23 manufacturability.
Availability
BC846B E6433 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer audio front-ends requiring stable component supply and long-term lifecycle assurance.
Supply support for BC846B E6433 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, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
The BC846 series belongs to Nexperia's general-purpose bipolar transistor product line, engineered specifically for cost-sensitive, high-volume AF amplification and switching applications demanding AEC-Q101 reliability and RoHS compliance.
FAQ
What is the maximum junction temperature for BC846B E6433?
The absolute maximum junction temperature (Tj) is 150 °C, validated per AEC-Q101 stress testing. Operation above this limit risks permanent degradation of hFE and increased leakage. Thermal design must ensure RthJS ≤ 240 K/W and board-level heat spreading to maintain safe margin under worst-case ambient and power dissipation.
Is BC846B E6433 pin-compatible with BC847B?
Yes - both share identical SOT23 pinout (Emitter-Base-Collector on pins 1-2-3) and mechanical footprint. However, BC847B has lower VCEO (45 V vs. 65 V) and reduced Ptot (330 mW vs. 330 mW at same TS), so substitution requires verification of voltage headroom and thermal margin in the target circuit.
Does BC846B E6433 support lead-free reflow soldering?
Yes - it is fully RoHS-compliant and qualified for lead-free reflow per JEDEC J-STD-020. Peak temperature tolerance is 260 °C for 30 seconds, with moisture sensitivity level (MSL) rated at 1, meaning no dry-pack or baking is required prior to assembly.
What is the typical noise voltage at 10 Hz for BC846B E6433?
The datasheet does not specify noise voltage at 10 Hz; it provides noise figure (F = 1.2–4 dB at 1 kHz, ∆f = 200 Hz) and equivalent noise voltage only for BC850 series (Vn = 0.135 µV, f = 10–50 Hz). For sub-100 Hz noise-critical designs, consult Nexperia's BC850C characterization data or perform bench measurement under matched conditions.
BC 846B E6433 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:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 65 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 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
BC 846B E6433 FAQ
1.How can I place an order for BC 846B E6433 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC 846B E6433 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 BC 846B E6433 reliable?
The price and inventory of BC 846B E6433 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC 846B E6433 is usually 5 days.
3.What payment methods are accepted for BC 846B E6433?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC 846B E6433 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC 846B E6433?
BC 846B E6433 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC 846B E6433 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 BC 846B E6433?
For technical support, including BC 846B E6433 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC 846B E6433 requirements.
6.How does Aetrix verify that BC 846B E6433 is sourced from the original manufacturer or authorized distributors?
All BC 846B E6433 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 BC 846B E6433 meets industry standards.
7.What is the process for return or replacement of BC 846B E6433?
All BC 846B E6433 units undergo pre-shipment inspection (PSI). If there is an issue with BC 846B E6433, 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 BC 846B E6433 part is unused and in its original packaging.
Return procedure for BC 846B E6433:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC 846B E6433 Tags
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