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

Nexperia USA Inc. BC846BW/DG/B3X

Name: BC846BW/DG/B3X
Brand: Nexperia USA Inc.
SKU: BC846BW/DG/B3X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC846BW/DG/B3X

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC846BW/DG/B3X.pdf

Description:: TRANS NPN 65V 0.1A SOT-323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC846BW/DG/B3X from Nexperia is an NPN general-purpose transistor in SOT323 (SC-70) package, rated for 65 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 200–450 at V_CE = 5 V, I_C = 2 mA. It serves as a compact switching or linear amplification device in space-constrained consumer and industrial PCBs.

For engineers reviewing the BC846BW/DG/B3X datasheet, BC846BW/DG/B3X pinout, BC846BW/DG/B3X application, or BC846BW/DG/B3X equivalent, key selection criteria include its 200 mW power dissipation at T_amb ≤ 25 °C, 2.2 mm × 1.35 mm footprint, low V_CE(sat) of 200 mV (typ.) at I_C = 100 mA / I_B = 5 mA, and guaranteed h_FE group B performance across –55 °C to +150 °C junction temperature range.

Technical Context

This transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: V_CBO = 80 V, V_EBO = 6 V, and T_j = 150 °C. Its thermal resistance R_th(j-a) is 625 K/W on standard FR4 PCB, enabling reliable operation under pulsed loads up to 200 mA peak with 1 ms pulse width.

Electrical characteristics are specified at 25 °C ambient and validated across –55 °C to +150 °C. Key nonlinear behaviors - including h_FE roll-off above 10 mA, V_BE temperature coefficient of ~–2 mV/K, and C_c = 2 pF - support stable biasing and high-frequency small-signal use up to 100 MHz f_T.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	65 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in switching applications.
I_C	100 mA continuous - Sustained collector current capability; supports logic-level load switching and pre-driver stages.
h_FE	200–450 at V_CE = 5 V, I_C = 2 mA - Tight gain binning (Group B) enables predictable bias design without trimming.
V_CE(sat)	200 mV typ. at I_C = 100 mA, I_B = 5 mA - Low saturation voltage minimizes conduction loss in digital switch configurations.
P_tot	200 mW at T_amb ≤ 25 °C - Power handling on standard FR4 PCB; derates linearly above 25 °C ambient.
f_T	100 MHz - Transition frequency confirms suitability for RF front-end amplification and fast-switching control loops.
C_c	2 pF - Collector-base capacitance limits Miller effect in high-speed switching; aids EMI control.

Pinout & Package

SOT323 (SC-70) is a 3-pin, surface-mount plastic package measuring 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for automated placement and reflow soldering on dense PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Current-controlled input node; requires series resistor to limit I_B and ensure saturation or linear operation.
2	Emitter (E)	Reference terminal for bias network; connected to ground or low-side return path in common-emitter configuration.
3	Collector (C)	Output current sink node; interfaces with load (e.g., LED, relay coil, logic gate input) in switching mode.

Key Features

Feature	Design Value
High-voltage NPN structure	65 V V_CEO rating enables use in 24 V and 48 V industrial control rails without derating.
Gain-binned Group B	h_FE = 200–450 ensures consistent current amplification across production lots, reducing calibration overhead.
Ultra-small SOT323 footprint	2.2 mm × 1.35 mm area saves >60% board space vs. SOT23, critical for wearables and IoT sensor nodes.
Thermal robustness	R_th(j-a) = 625 K/W on FR4 allows sustained 100 mA operation up to +85 °C ambient with no heatsink.
Low-noise amplification	NF = 2–10 dB at 1 kHz supports audio preamp and sensor signal conditioning without external filtering.

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs in portable instrumentation.

IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground.

Use Value: V_CE(sat) ≤ 200 mV ensures >95% LED forward voltage utilization and minimal self-heating at 20 mA.

Use Scenario: Amplifying weak analog sensor signals (e.g., thermistor, photodiode) before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter-degeneration bias for stable DC gain and bandwidth.

Use Value: f_T = 100 MHz and h_FE ≥ 200 enable 10 kHz–1 MHz signal amplification with <1% distortion at 2 mA I_C.

Power Supply Enable Switch

Level Translation Interface

Use Scenario: Enabling/disabling 12 V auxiliary rails using 3.3 V logic in embedded power management subsystems.

IC Role / Device Role / Timing Role: High-side or low-side switch controlling PMOS/NMOS gate drive or LDO EN pin.

Use Value: 65 V V_CEO and 100 mA I_C allow direct control of 12 V/24 V enable lines without additional protection circuitry.

Use Scenario: Translating 1.8 V logic outputs to 5 V-compatible inputs in mixed-voltage microcontroller systems.

IC Role / Device Role / Timing Role: Active pull-up level shifter using common-collector (emitter-follower) configuration.

Use Value: V_BE ≈ 660 mV at I_C = 2 mA ensures accurate 1.8 V → 5 V translation with <5 ns propagation delay.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BW	Same SOT323 package; h_FE = 200–450 (Group B), but V_CEO = 45 V (vs. 65 V)	Limited to ≤36 V systems; unsuitable for 48 V industrial bus interfaces	Select when lower voltage rating is acceptable and cost optimization is prioritized
MMBT3904LT1G	SOT23 package; h_FE = 100–300; V_CEO = 40 V; P_tot = 310 mW	Larger footprint (2.9 mm × 1.3 mm); higher power but lower voltage and gain consistency	Choose for legacy designs requiring SOT23 compatibility or higher power margin at lower voltage

Compared with BC846BW/DG/B3X, BC847BW trades 20 V breakdown headroom for identical gain binning and footprint, while MMBT3904LT1G offers greater power handling in a larger package but lacks the 65 V rating and tight h_FE spread needed for precision biasing in high-reliability 48 V systems.

Availability

BC846BW/DG/B3X is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, power supply enable switching, and level translation interfaces requiring stable component supply and consistent gain performance.

Supply support for BC846BW/DG/B3X 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BC846xW series belongs to Nexperia's general-purpose transistor product line, engineered for cost-sensitive, space-constrained applications demanding consistent gain, low saturation voltage, and robust thermal performance in consumer and industrial electronics.

FAQ

What is the maximum operating temperature for BC846BW/DG/B3X?

The BC846BW/DG/B3X has a maximum junction temperature (T_j) of 150 °C and storage temperature range of –65 °C to +150 °C. Its thermal resistance R_th(j-a) is 625 K/W on standard FR4 PCB, meaning it can sustain 100 mA collector current up to +85 °C ambient without exceeding T_j = 150 °C, assuming no additional heatsinking.

How does the h_FE variation affect bias stability in amplifier designs?

BC846BW/DG/B3X is binned to Group B (h_FE = 200–450), significantly tighter than standard BC846W (110–450). This reduces base current uncertainty by >2×, enabling stable DC bias in common-emitter amplifiers without emitter degeneration resistors - critical for low-component-count sensor front-ends.

Can BC846BW/DG/B3X replace BC846B in through-hole designs?

No - BC846BW/DG/B3X uses SOT323 (SC-70) surface-mount packaging, while through-hole BC846B uses TO-92. The pinouts, thermal profiles, and PCB layout requirements differ fundamentally. Direct replacement requires redesigning the footprint, thermal relief, and assembly process; no mechanical or soldering compatibility exists.

Is BC846BW/DG/B3X suitable for automotive applications?

No - BC846BW/DG/B3X is not AEC-Q101 qualified and lacks automotive-specific testing (e.g., HTOL, temperature cycling, ESD robustness per ISO 10605). Nexperia explicitly states non-automotive qualification in its legal disclaimers; use only in consumer, industrial, or commercial equipment where automotive reliability standards do not apply.

BC846BW/DG/B3X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BC846xW

Package/Case:: SC-70, SOT-323

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:: 400mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 2mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

BC846BW/DG/B3X FAQ

1.How can I place an order for BC846BW/DG/B3X through Aetrix?

Please submit a Request for Quotation (RFQ) for BC846BW/DG/B3X 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 BC846BW/DG/B3X reliable?

The price and inventory of BC846BW/DG/B3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BW/DG/B3X is usually 5 days.

3.What payment methods are accepted for BC846BW/DG/B3X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BW/DG/B3X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC846BW/DG/B3X?

BC846BW/DG/B3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC846BW/DG/B3X 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 BC846BW/DG/B3X?

For technical support, including BC846BW/DG/B3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BW/DG/B3X requirements.

6.How does Aetrix verify that BC846BW/DG/B3X is sourced from the original manufacturer or authorized distributors?

All BC846BW/DG/B3X 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 BC846BW/DG/B3X meets industry standards.

7.What is the process for return or replacement of BC846BW/DG/B3X?

All BC846BW/DG/B3X units undergo pre-shipment inspection (PSI). If there is an issue with BC846BW/DG/B3X, 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 BC846BW/DG/B3X part is unused and in its original packaging.

Return procedure for BC846BW/DG/B3X:

1.Submit a request within 90 days.

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

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