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

Diodes Incorporated BC847A-7-F

Name: BC847A-7-F
Brand: Diodes Incorporated
SKU: BC847A-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847A-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: BC847A-7-F.pdf

Description:: TRANS NPN 45V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:106,139

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Product details

Overview

BC847A-7-F from Diodes Incorporated is an NPN small-signal transistor in SOT23 package, rated for 45 V V_CEO, 100 mA I_C, and 310 mW P_D, with DC current gain (h_FE) of 110–220 at 2 mA/5 V. It serves as a general-purpose switch or audio-frequency amplifier in low-power analog and digital interface circuits.

For engineers reviewing the BC847A-7-F datasheet, BC847A-7-F pinout, BC847A-7-F application, or BC847A-7-F equivalent, key selection criteria include V_CEO derating at elevated temperature, h_FE consistency across production lots, V_CE(sat) at 10 mA/0.5 mA drive, and thermal resistance under 1 oz FR4 layout conditions.

Technical Context

This transistor operates in active, saturation, and cutoff regions with verified switching performance up to 100 MHz f_T at 10 mA/5 V bias. Its 6 V V_EBO and 50 V V_CBO support reliable base-emitter and collector-base reverse blocking in signal routing and level-shifting topologies.

The device exhibits 90–250 mV V_CE(sat) at I_C = 10 mA/I_B = 0.5 mA and 200–600 mV under high-current saturation (I_C = 100 mA/I_B = 5 mA), enabling predictable on-state loss in discrete logic-level switching stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown under standard test conditions; defines safe operating ceiling in linear and switching applications.
I_C	100 mA - Continuous collector current rating; sets upper limit for steady-state conduction without thermal runaway on 1 oz FR4.
h_FE	110–220 - DC current gain range at 2 mA/5 V; determines required base drive for target collector current in amplifier or saturated switch designs.
V_CE(sat)	90–250 mV - Collector-emitter saturation voltage at 10 mA/0.5 mA; directly impacts power loss and voltage headroom in on-state operation.
f_T	100–300 MHz - Transition frequency at 5 V/10 mA; indicates usable bandwidth for RF-coupled AF amplifiers and fast-switching circuits.
R_θJA	403 °C/W - Junction-to-ambient thermal resistance on minimum pad layout; used to calculate junction temperature rise under given power dissipation.

Pinout & Package

BC847A-7-F is housed in a surface-mount SOT23 package with 3-pin configuration and 0.008 g mass. The molded plastic body meets UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Reference node for base-emitter bias; connects to ground or low-impedance return path in common-emitter configurations.
2 (Base)	Control input	Receives current-limited drive to modulate collector current; requires series resistor to limit I_B and prevent overdrive.
3 (Collector)	Current source terminal	Delivers amplified or switched output current; connects to load and supply rail in typical switching or amplification topologies.

Key Features

Feature	Design Value
Lead-free & RoHS 3 compliant	Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, bromine & chlorine <900 ppm each, antimony <1000 ppm.
SOT23 mechanical compatibility	Standardized footprint enables automated placement and reflow soldering; compatible with industry-standard pick-and-place nozzles and stencil apertures.
ESD robustness	HBM rating of 4000 V ensures handling resilience during board assembly and functional testing without external protection diodes.
Thermal derating capability	Power dissipation reduces linearly above +25°C ambient; maintains 100% P_D up to +70°C on 15 mm × 15 mm 1 oz copper PCB.

Applications

Industrial Sensor Interface

USB Port Power Switching

Use Scenario: Amplifying low-level signals from RTD or thermistor bridges in programmable logic controller (PLC) analog input modules.

IC Role / Device Role / Timing Role: NPN small-signal amplifier configured in common-emitter topology with emitter degeneration for stable gain and linearity.

Use Value: 200 mV V_CE(sat) at 10 mA ensures minimal voltage drop across collector load, preserving dynamic range for 0–10 V output scaling.

Use Scenario: Enabling/disabling 5 V power delivery to downstream USB peripherals via microcontroller GPIO control.

IC Role / Device Role / Timing Role: Low-side switch with base driven by 3.3 V MCU output through current-limiting resistor.

Use Value: 90 mV typical V_CE(sat) minimizes insertion loss and self-heating during continuous 100 mA load current.

Automotive Interior Lighting Control

Consumer Audio Pre-amplifier Stage

Use Scenario: Driving LED strings in dashboard backlighting where PWM dimming frequency exceeds 1 kHz.

IC Role / Device Role / Timing Role: Fast-switching NPN transistor operating in saturation/cutoff with 100 ns turn-on delay (typical).

Use Value: 300 MHz f_T supports clean edge transitions at 20 kHz PWM, reducing audible noise and EMI in cabin environment.

Use Scenario: First-stage voltage amplification in portable headphone amplifier ICs using discrete transistor topology.

IC Role / Device Role / Timing Role: Common-emitter amplifier biased at 2 mA with 4.7 kΩ collector load and 1 µF emitter bypass capacitor.

Use Value: 2–10 dB NF at 1 kHz enables low-noise signal conditioning before op-amp buffering, critical for SNR >95 dB.

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-7-F	h_FE = 200–450 (vs. 110–220); same V_CEO, V_CE(sat), and package	Higher gain enables lower base drive current but increases sensitivity to thermal drift in precision bias networks	Select when tighter h_FE tolerance is needed for consistent switching thresholds across temperature.
MMBT3904LT1G	V_CEO = 40 V (5 V lower); h_FE = 100–300; R_θJA = 375 °C/W (28 °C/W better)	Slightly reduced voltage margin but improved thermal performance on dense PCB layouts	Prefer for space-constrained consumer electronics where 5 V headroom reduction is acceptable and thermal relief is critical.

Compared with BC847B-7-F, the BC847A-7-F offers tighter h_FE spread for predictable base current design, while MMBT3904LT1G trades 5 V V_CEO margin for superior thermal resistance-making BC847A-7-F optimal for industrial signal conditioning where voltage safety margin and gain stability outweigh thermal optimization needs.

Availability

BC847A-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB power switching, and automotive lighting control requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for BC847A-7-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 industrial, automotive, and computing markets since 1959.

The BC846A–BC848C series was designed specifically for cost-sensitive, high-volume applications requiring consistent small-signal gain, low saturation voltage, and full RoHS compliance in compact SOT23 packaging.

FAQ

What is the maximum allowable junction temperature for BC847A-7-F?

The absolute maximum junction temperature is +150°C per the datasheet's Operating and Storage Temperature Range specification. Derating begins at +25°C ambient, with full 310 mW power dissipation permitted only below +70°C on a 15 mm × 15 mm 1 oz copper PCB per Figure 2.

Does BC847A-7-F support automotive-grade reliability requirements?

No-BC847A-7-F is not qualified to AEC-Q101. For automotive applications, Diodes offers the pin-compatible BC847AQ-7-F variant, which undergoes additional stress testing including HTOL, temperature cycling, and ESD per AEC-Q101 Rev H standards.

Can BC847A-7-F be used in linear amplifier configurations?

Yes-it is specified for AF amplifier applications with 2–10 dB noise figure at 1 kHz and 200–800 MHz f_T. Stable operation requires emitter degeneration and proper thermal management, as gain variation exceeds ±15% across -50°C to +150°C per Figure 5.

What is the marking code for BC847A-7-F on the SOT23 package?

The top-side marking is "K1Q", as confirmed in the Ordering Information table of DS11108 Rev. 28-2. This 3-character code uniquely identifies the BC847A grade within the BC846A–BC848C family and is laser-etched on the device body.

BC847A-7-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):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 15nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 110 @ 2mA, 5V

Power - Max:: 300 mW

Frequency - Transition:: 300MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BC847A-7-F FAQ

1.How can I place an order for BC847A-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847A-7-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 BC847A-7-F reliable?

The price and inventory of BC847A-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847A-7-F is usually 5 days.

3.What payment methods are accepted for BC847A-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847A-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847A-7-F?

BC847A-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847A-7-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 BC847A-7-F?

For technical support, including BC847A-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847A-7-F requirements.

6.How does Aetrix verify that BC847A-7-F is sourced from the original manufacturer or authorized distributors?

All BC847A-7-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 BC847A-7-F meets industry standards.

7.What is the process for return or replacement of BC847A-7-F?

All BC847A-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC847A-7-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 BC847A-7-F part is unused and in its original packaging.

Return procedure for BC847A-7-F:

1.Submit a request within 90 days.

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

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