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

Diodes Incorporated BC846BQ-13-F

Name: BC846BQ-13-F
Brand: Diodes Incorporated
SKU: BC846BQ-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC846BQ-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: BC846BQ-13-F.pdf

Description:: TRANS NPN 65V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:20,000

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Product details

Overview

BC846BQ-13-F from Diodes Incorporated is an NPN small-signal transistor in SOT23 package, rated for 80 V collector-base voltage, 65 V collector-emitter voltage, and 100 mA continuous collector current, with DC current gain (h_FE) of 200–450 at I_C = 2 mA, used in low-power switching and audio-frequency amplifier stages in consumer and industrial control circuits.

For engineers reviewing the BC846BQ-13-F datasheet, BC846BQ-13-F pinout, BC846BQ-13-F application, or BC846BQ-13-F equivalent, key selection criteria include V_CEO/V_CBO ratings, h_FE spread at defined bias points, V_CE(sat) at I_C = 10 mA/100 mA, thermal resistance (R_θJA = 403 °C/W), and RoHS/Green compliance status.

Technical Context

This transistor operates as a general-purpose NPN bipolar junction device optimized for linear amplification and saturated switching. Its h_FE range (200–450) and low V_CE(sat) (90–250 mV at I_C = 10 mA) support stable biasing in Class-A amplifiers and fast turn-on in digital logic interfaces.

Thermal performance is defined for 1 oz copper FR4 PCB layouts: R_θJA = 403 °C/W (minimum pad) and 357 °C/W (15 mm × 15 mm pad), enabling predictable derating up to +150 °C junction temperature. ESD robustness includes 4 kV HBM and 400 V MM ratings.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	80 V - maximum reverse-biased collector-base voltage before breakdown; sets upper limit for voltage swing in common-emitter switch configurations
V_CEO	65 V - maximum collector-emitter voltage under open-base condition; defines safe operating ceiling for load-side voltage in relay drivers
I_C (continuous)	100 mA - maximum steady-state collector current; determines usable load current in LED drivers or signal buffers
h_FE	200–450 @ I_C = 2 mA, V_CE = 5 V - current gain spread impacts base drive design margin and stability in amplifier feedback networks
V_CE(sat)	90–250 mV @ I_C = 10 mA / I_B = 0.5 mA - low saturation voltage minimizes power loss and heating in high-duty-cycle switching applications
f_T	100–300 MHz - transition frequency enables reliable operation up to ~50 MHz in RF preamp or broadband signal conditioning stages
R_θJA	403 °C/W - thermal resistance on minimal PCB pad; requires careful layout planning for ambient temperatures above +70 °C

Pinout & Package

Package: SOT23 - surface-mount plastic package with 3-pin configuration, 0.008 g mass, UL 94V-0 flammability rating, and matte tin-plated leads compliant with MIL-STD-202 solderability requirements.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; defines reference node for bias network and output swing
2 (Base)	Control input	Receives current-limited drive signal; requires series resistor to limit I_B and ensure saturation or linear operation
3 (Collector)	Current source terminal	Drives load (e.g., relay coil, LED, next-stage input); voltage swing limited by V_CEO and external supply

Key Features

Feature	Design Value
Automated insertion compatibility	SOT23 footprint supports high-speed pick-and-place assembly without lead forming or orientation issues
Lead-free & RoHS 3 compliant	Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, bromine & chlorine <1500 ppm total
High ESD tolerance	4 kV HBM rating enables handling in standard production environments without special static mitigation
Wide operating temperature	-65 °C to +150 °C junction range supports deployment in automotive under-hood and industrial motor-control enclosures

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving discrete indicator LEDs or low-current segment displays from 3.3 V or 5 V logic rails.

IC Role / Device Role / Timing Role: NPN switch controlling LED anode-to-V_CC current path with emitter grounded.

Use Value: V_CE(sat) ≤ 250 mV ensures >95% efficiency at 20 mA, minimizing self-heating and enabling compact PCB layout.

Use Scenario: Extending digital output capability of resource-constrained MCUs via discrete transistor arrays.

IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between MCU GPIO and higher-voltage peripherals.

Use Value: h_FE ≥ 200 allows microamp-level base drive while delivering 10–100 mA collector current reliably.

Audio Pre-amplifier Stage

Relay Control Interface

Use Scenario: Low-noise voltage amplification of microphone or sensor signals in portable audio devices.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration resistor for linearity.

Use Value: NF = 2–10 dB at 1 kHz and I_C = 200 µA enables clean signal gain without significant noise floor elevation.

Use Scenario: Isolating and driving 5–12 V DC relays from logic-level control signals in PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated switch interfacing MCU outputs to relay coils with flyback diode protection.

Use Value: V_CEO = 65 V safely accommodates 12 V relay coil transients and L/R decay spikes.

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
BC847B-13-F	Lower V_CEO (45 V vs. 65 V), same h_FE range and package	Not suitable for 60 V rail applications; acceptable in 5–24 V systems with tighter voltage margins	Select when system V_CC ≤ 30 V and cost optimization is prioritized over voltage headroom
MMBT3904LT1G	Higher V_CEO (40 V), wider h_FE spread (100–300), identical SOT23 footprint	Limited use in 65 V designs; better suited for high-volume consumer electronics with looser gain tolerance	Choose for legacy-compatible drop-in replacement where V_CEO margin is not critical and supply chain diversification is needed

Compared with BC846BQ-13-F, BC847B-13-F trades 20 V collector-emitter headroom for identical gain and cost, while MMBT3904LT1G offers broader availability but lower voltage rating and less consistent h_FE, making BC846BQ-13-F optimal for 60 V–class industrial switching where reliability and specification margin are essential.

Availability

BC846BQ-13-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and relay control interfaces requiring stable component supply across automotive, industrial automation, and consumer electronics programs.

Supply support for BC846BQ-13-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for power management, signal integrity, and protection applications.

The BC846–BC848 series belongs to Diodes' general-purpose bipolar transistor product line, designed specifically for cost-sensitive, high-volume switching and amplification tasks in space-constrained PCBs.

FAQ

What is the maximum allowable junction temperature for BC846BQ-13-F?

The absolute maximum junction temperature is +150 °C, with storage temperature matching this range. Operation above this limit risks permanent degradation of h_FE and increased leakage currents. Derating begins at +25 °C ambient per the 403 °C/W R_θJA curve, requiring thermal analysis for sustained loads above 50 mW.

Is BC846BQ-13-F qualified for automotive applications?

Yes - the "Q" suffix denotes Diodes' automotive-grade variant, qualified to AEC-Q101 standards. It features enhanced process controls, extended temperature validation (-40 °C to +150 °C), and lot-level traceability, distinguishing it from commercial-grade BC846B-13-F.

How does the h_FE variation affect bias network design?

With h_FE ranging from 200 to 450 at I_C = 2 mA, base resistors must be sized to guarantee saturation across the full spread. For example, driving 10 mA collector current requires I_B ≥ 22.2 µA (10 mA ÷ 450) minimum, but designing for 50 µA ensures margin even at lowest gain.

Can BC846BQ-13-F replace BC846A-13-F in existing designs?

Yes - both share identical package, pinout, and absolute maximum ratings. The primary difference is h_FE: BC846A has 110–220 vs. BC846B's 200–450. Substitution is safe if the circuit tolerates higher gain, but verify stability in feedback loops and avoid in precision current mirrors where gain matching matters.

BC846BQ-13-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

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

Power - Max:: 310 mW

Frequency - Transition:: 300MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BC846BQ-13-F FAQ

1.How can I place an order for BC846BQ-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BC846BQ-13-F 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 BC846BQ-13-F reliable?

The price and inventory of BC846BQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BQ-13-F is usually 5 days.

3.What payment methods are accepted for BC846BQ-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BQ-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC846BQ-13-F?

BC846BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC846BQ-13-F 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 BC846BQ-13-F?

For technical support, including BC846BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BQ-13-F requirements.

6.How does Aetrix verify that BC846BQ-13-F is sourced from the original manufacturer or authorized distributors?

All BC846BQ-13-F 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 BC846BQ-13-F meets industry standards.

7.What is the process for return or replacement of BC846BQ-13-F?

All BC846BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BC846BQ-13-F, 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 BC846BQ-13-F part is unused and in its original packaging.

Return procedure for BC846BQ-13-F:

1.Submit a request within 90 days.

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

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