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

Diodes Incorporated AC848BQ-13

Name: AC848BQ-13
Brand: Diodes Incorporated
SKU: AC848BQ-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AC848BQ-13

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: AC848BQ-13.pdf

Description:: TRANS NPN 30V 0.1A SOT-23-3

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Product details

Overview

AC848BQ-13 from Diodes Incorporated is an AEC-Q101 qualified NPN small-signal transistor in SOT23 package, rated for V_CEO = 30 V, I_C = 100 mA, and h_FE = 200–450 at I_C = 2 mA / V_CE = 5 V. It delivers f_T = 100–300 MHz and V_CE(sat) ≤ 250 mV at I_C = 10 mA / I_B = 0.5 mA, supporting switching and audio-frequency amplifier functions in automotive control modules.

For engineers reviewing the AC848BQ-13 datasheet, AC848BQ-13 pinout, AC848BQ-13 application, or AC848BQ-13 equivalent, key selection criteria include its AEC-Q101 qualification, SOT23 thermal resistance (R_θJA = 403 °C/W on minimal pad), 30 V V_CEO rating, 300 MHz f_T, and 4000 V HBM ESD tolerance-critical for under-hood sensor interfaces and power management drivers.

Technical Context

This NPN BJT operates as a linear amplifier or saturated switch in low-power automotive signal paths. Its DC current gain band (h_FE = 200–450) and transition frequency (f_T ≥ 100 MHz) support stable AF amplification up to ~10 kHz and fast edge-controlled switching with t_on/t_off < 10 ns (typical).

Thermally, it sustains operation from −65 °C to +150 °C with 310 mW power dissipation on standard FR-4, and its 4000 V HBM/400 V MM ESD ratings enable robustness in unshielded harness-connected nodes without external protection diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 12 V automotive supply rails with transients.
I_C	100 mA continuous - Supports drive of LEDs, relays, and logic-level inputs without heatsinking in space-constrained modules.
h_FE	200–450 @ 2 mA / 5 V - Enables predictable biasing in emitter-follower and common-emitter configurations across temperature.
f_T	100–300 MHz - Ensures adequate gain margin for audio preamp stages and high-speed digital interface buffering.
V_CE(sat)	≤ 250 mV @ 10 mA / 0.5 mA - Minimizes conduction loss and self-heating in switching applications like fuel injector drivers.
R_θJA	403 °C/W - Requires minimal copper area (1 oz, single-sided) for thermal compliance in ambient up to +85 °C.
ESD HBM	4000 V - Eliminates need for external ESD protection in CAN/LIN node input conditioning circuits.

Pinout & Package

Package: SOT23 - Surface-mount plastic package (2.9 mm × 1.3 mm × 1.0 mm), UL 94V-0 rated, matte tin-plated leads, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-side return path; determines reference for V_BE bias and saturation behavior.
2 (Base)	Control input	Receives current-limited drive (e.g., via 10 kΩ resistor); governs h_FE-dependent collector current scaling.
3 (Collector)	Current source terminal	Supplies load current to V_CC; must withstand 30 V transients and dissipate ≤310 mW under worst-case duty cycle.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood use per stress test requirements including HTOL, TC, and ESD-enables direct integration into ASIL-B subsystems.
SOT23 footprint	Enables automated placement and reflow compatibility with standard pick-and-place equipment; reduces PCB real estate by >50% vs. TO-92.
h_FE band B (200–450)	Provides tight DC gain distribution for consistent bias point setting across production lots without trimming resistors.
Green, halogen-free construction	Meets EU RoHS 3 and automotive OEM material declarations (Br+Cl <1500 ppm, Sb <1000 ppm) for global vehicle homologation.
4000 V HBM ESD rating	Permits direct connection to exposed connectors (e.g., diagnostic ports) without series resistors or TVS clamps.

Applications

Engine Control Unit (ECU) Sensor Interface

Automotive Lighting Driver

Use Scenario: Amplifying low-level signals from crankshaft position sensors or knock sensors before ADC sampling.

IC Role / Device Role / Timing Role: NPN common-emitter amplifier stage providing 20–30 dB voltage gain with bandwidth >10 kHz.

Use Value: Maintains SNR >60 dB at 1 kHz due to NF ≤10 dB and stable h_FE across −40 °C to +125 °C.

Use Scenario: Switching LED strings in interior map lights or dashboard backlighting controlled by PWM MCU outputs.

IC Role / Device Role / Timing Role: Low-saturation NPN switch sinking up to 100 mA per channel with t_on/t_off <10 ns.

Use Value: Achieves >99% PWM fidelity at 1 kHz with V_CE(sat) ≤250 mV, minimizing thermal rise in sealed lamp housings.

Body Control Module (BCM) Relay Driver

Infotainment System Audio Preamp

Use Scenario: Driving 12 V coil relays for door lock actuators or window lift motors using 3.3 V MCU GPIO.

IC Role / Device Role / Timing Role: Saturated switch with base current gain sufficient to deliver 100 mA collector current from 0.5 mA base drive.

Use Value: Guarantees relay closure within 100 µs while limiting power dissipation to ≤150 mW at ambient +85 °C.

Use Scenario: First-stage amplification of microphone or line-in signals prior to codec digitization in head unit designs.

IC Role / Device Role / Timing Role: Common-emitter AF amplifier with f_T ≥100 MHz ensuring flat response to 20 kHz and low distortion.

Use Value: Delivers THD <1% at 1 kHz with 10 kΩ source impedance and 100 kΩ load, meeting OEM audio quality specs.

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
BC847BW,115	V_CEO = 45 V, h_FE = 110–800 (band W), R_θJA = 375 °C/W	Higher voltage margin but wider h_FE spread; less suitable for precision biasing in temperature-critical nodes	Select when higher V_CEO headroom is needed and gain variation can be accommodated via feedback.
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300, f_T = 300 MHz, non-AEC-Q101	Lacks automotive qualification and lower h_FE floor; requires additional validation for under-hood deployment	Acceptable for non-safety-critical cabin applications where cost is prioritized over qualification traceability.

Compared with BC847BW and MMBT3904LT1G, AC848BQ-13 provides tighter h_FE control (200–450), guaranteed AEC-Q101 compliance, and optimized thermal performance for space-constrained automotive modules-making it preferred for ECU, BCM, and lighting systems requiring zero-defect reliability.

Availability

AC848BQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, and automotive lighting systems requiring stable component supply, long-term lifecycle assurance, and full traceability to IATF16949-certified manufacturing lines.

Supply support for AC848BQ-13 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 automotive, industrial, and computing markets.

The AC847/AC848 series belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive signal conditioning, switching, and amplification in harsh-environment ECUs and body electronics.

FAQ

Is AC848BQ-13 pin-compatible with AC847BQ-7?

Yes-both use identical SOT23 pinout (Emitter-Base-Collector on pins 1-2-3) and share mechanical dimensions, thermal profiles, and absolute maximum ratings except V_CEO (30 V vs. 45 V) and V_CBO (30 V vs. 50 V). The AC848BQ-13 is not a drop-in replacement where 45 V collector-base standoff is required.

What is the marking code for AC848BQ-13 on the device body?

The top-side marking is "2K9", followed by a two-character date code (e.g., "M9" for September 2025). This matches the ordering information table in DS39448 Rev. 4–2, confirming authenticity and lot traceability per Diodes' packaging standards.

Does AC848BQ-13 require derating above 25°C ambient?

Yes-power dissipation must be linearly derated above +25°C at 0.77 mW/°C (based on R_θJA = 403 °C/W). At +85°C ambient, maximum allowable PD drops to 265 mW; at +125°C, it falls to 235 mW. Derating curves are provided in Figure 1 of DS39448.

Can AC848BQ-13 be used in linear regulator pass-transistor applications?

No-it is not characterized or qualified for linear regulator use. Its SOA limits (e.g., 200 mA peak I_C, 310 mW P_D) and lack of Safe Operating Area graphs in the datasheet indicate design intent for switching and AF amplification only-not continuous high-current, high-V_CE operation typical of pass devices.

AC848BQ-13 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):: 30 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

AC848BQ-13 FAQ

1.How can I place an order for AC848BQ-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AC848BQ-13 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 AC848BQ-13 reliable?

The price and inventory of AC848BQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AC848BQ-13 is usually 5 days.

3.What payment methods are accepted for AC848BQ-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AC848BQ-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AC848BQ-13?

AC848BQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AC848BQ-13 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 AC848BQ-13?

For technical support, including AC848BQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AC848BQ-13 requirements.

6.How does Aetrix verify that AC848BQ-13 is sourced from the original manufacturer or authorized distributors?

All AC848BQ-13 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 AC848BQ-13 meets industry standards.

7.What is the process for return or replacement of AC848BQ-13?

All AC848BQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with AC848BQ-13, 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 AC848BQ-13 part is unused and in its original packaging.

Return procedure for AC848BQ-13:

1.Submit a request within 90 days.

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

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