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

Diodes Incorporated BC848B-7-F

Name: BC848B-7-F
Brand: Diodes Incorporated
SKU: BC848B-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC848B-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: BC848B-7-F.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC848B-7-F from Diodes Incorporated is an 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), with V_CE(sat) ≤ 250 mV at I_C = 10 mA / I_B = 0.5 mA. It is used in low-power switching and audio-frequency amplification circuits in consumer and industrial electronics.

For engineers reviewing the BC848B-7-F datasheet, BC848B-7-F pinout, BC848B-7-F application, or BC848B-7-F equivalent, key selection criteria include DC current gain spread, saturation voltage under defined drive conditions, thermal derating on standard PCB layouts, and compatibility with automated SMT assembly processes.

Technical Context

This device operates as a general-purpose bipolar junction transistor with fixed NPN polarity and base-emitter junction forward-biased control. Its h_FE binning (B-grade) guarantees minimum DC current gain of 200 and typical value of 290 at 2 mA collector current, enabling predictable biasing in linear and saturated switching modes.

The SOT23 package delivers R_θJA = 357 °C/W on 15 mm × 15 mm 1 oz copper, supporting continuous operation up to +150 °C junction temperature. Electrical performance is specified under pulsed test conditions (≤300 µs pulse width, ≤2% duty cycle) to minimize self-heating during characterization.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration.
I_C (cont.)	100 mA - Continuous collector current limit defining safe linear/switching operation at ambient temperature.
h_FE (min/typ)	200 / 290 - Confirmed DC current gain range at 2 mA, 5 V, ensuring stable bias point design in amplifier or switch driver stages.
V_CE(sat)	≤250 mV @ I_C=10 mA, I_B=0.5 mA - Low saturation voltage enables efficient low-side switching with minimal conduction loss.
f_T	100–300 MHz - Gain-bandwidth product confirming usable RF performance up to VHF band in tuned amplifier applications.
P_D	350 mW - Maximum power dissipation on 15 mm × 15 mm 1 oz copper PCB, setting thermal layout requirements.
ESD HBM	4,000 V - Robustness against human-body model electrostatic discharge supports handling in non-EPA environments.

Pinout & Package

SOT23 surface-mount plastic package with matte tin-plated leads, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020. Weight: 0.008 g. Dimensions: 2.90 mm × 1.30 mm × 0.915 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; defines reference for base drive and collector load placement.
2 (Base)	Control input	Receives current-limited drive signal; requires series resistor to set I_B for desired I_C and saturation margin.
3 (Collector)	Current source terminal	Connected to load (e.g., relay coil, LED, logic input); voltage swing limited by V_CEO and load supply.

Key Features

Feature	Design Value
Automated insertion compatibility	SOT23 footprint and lead geometry optimized for pick-and-place and reflow soldering in high-volume manufacturing.
Green compound construction	Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meeting RoHS 3 and automotive environmental standards.
Complementary PNP pairing	Direct counterpart BC858B-7-F available for push-pull or differential pair designs without redesign.
High-temperature operation	Rated for continuous operation from –65 °C to +150 °C junction temperature, supporting industrial and under-hood applications.

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving discrete indicator LEDs from 3.3 V or 5 V microcontroller outputs with current limiting.

IC Role / Device Role / Timing Role: NPN switch controlling LED anode-to-V_CC or cathode-to-ground path based on GPIO logic state.

Use Value: V_CE(sat) ≤ 250 mV ensures >95% efficiency at 10–20 mA LED current, minimizing heat rise in compact PCB layouts.

Use Scenario: Amplifying weak sensor signals or buffering digital lines between mixed-voltage domains (e.g., 1.8 V MCU to 5 V peripheral).

IC Role / Device Role / Timing Role: Common-emitter amplifier or level-shifting buffer stage with gain stability ensured by h_FE ≥ 200.

Use Value: f_T ≥ 100 MHz supports clean signal integrity up to 10 MHz digital edges and 1 kHz analog bandwidth without phase distortion.

Relay Coil Driver

Audio Pre-amplifier Stage

Use Scenario: Switching 5–24 V relay coils requiring 10–50 mA holding current in industrial control modules.

IC Role / Device Role / Timing Role: Saturated NPN switch providing low-impedance path from coil to ground, controlled by logic-level signal.

Use Value: I_C = 100 mA rating and 4.5 kΩ input impedance (h_ie) allow direct drive from most MCU GPIO pins with minimal base resistor sizing.

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

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased at 2 mA for optimal noise figure (NF = 2 dB) and linearity.

Use Value: NF = 2 dB at 1 kHz and I_C = 200 µA enables high signal-to-noise ratio in battery-powered front-end stages.

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	V_CEO = 45 V, V_CE(sat) ≤ 200 mV @ same I_C/I_B, h_FE = 200–450 (same bin)	Higher breakdown margin suits 24 V systems; lower V_CE(sat) reduces conduction loss in higher-current switching.	Select when operating collector voltage exceeds 30 V or when tighter saturation voltage tolerance is required.
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300 (wider spread), R_θJA = 357 °C/W (same), marking K1R identical	Broader h_FE distribution increases bias design margining effort; identical SOT23 footprint and thermal behavior.	Choose only if second-source qualification mandates ON Semiconductor pedigree; verify h_FE bin impact on circuit stability.

Compared with BC847B-7-F, BC848B-7-F trades 15 V lower V_CEO for tighter process control in 30 V rail applications; versus MMBT3904LT1G, it offers narrower h_FE spread and guaranteed green compliance without trade-offs in thermal or package performance.

Availability

BC848B-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, relay coil driving, and audio pre-amplifier stages requiring stable component supply across production lifecycles.

Supply support for BC848B-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, industry-qualified components for automotive, industrial, and consumer markets.

The BC846–BC848 series belongs to Diodes' general-purpose small-signal transistor product line, engineered for cost-sensitive, high-volume applications demanding consistent gain binning, robust ESD protection, and full RoHS 3 compliance.

FAQ

What is the maximum continuous collector current for BC848B-7-F?

The maximum continuous collector current is 100 mA at T_A = +25°C, derated linearly above +25°C based on R_θJA = 357 °C/W on 15 mm × 15 mm 1 oz copper. At +85°C ambient, usable I_C drops to approximately 78 mA to maintain T_J ≤ +150°C.

Is BC848B-7-F suitable for automotive applications?

BC848B-7-F is not AEC-Q101 qualified; however, Diodes offers the automotive-compliant BC848BQ-7-F variant with identical electrical specs and extended temperature validation. Use BC848BQ-7-F for under-hood or safety-critical automotive systems.

What does the 'B' suffix indicate in BC848B-7-F?

The 'B' denotes the h_FE gain bin: 200–450 at I_C = 2 mA and V_CE = 5 V. This distinguishes it from 'A' (110–220) and 'C' (420–800) variants, enabling precise bias network design without post-manufacturing sorting.

Can BC848B-7-F replace BC847B-7-F in existing designs?

Yes, with verification of V_CEO margin: BC848B-7-F has 30 V rating versus BC847B-7-F's 45 V. If circuit V_CE never exceeds 30 V and V_CE(sat) tolerance allows ≤250 mV (vs. BC847B's ≤200 mV), substitution is electrically valid and mechanically identical.

BC848B-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):: 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:: 300 mW

Frequency - Transition:: 300MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BC848B-7-F FAQ

1.How can I place an order for BC848B-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BC848B-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 BC848B-7-F reliable?

The price and inventory of BC848B-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 BC848B-7-F is usually 5 days.

3.What payment methods are accepted for BC848B-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848B-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC848B-7-F?

BC848B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC848B-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 BC848B-7-F?

For technical support, including BC848B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848B-7-F requirements.

6.How does Aetrix verify that BC848B-7-F is sourced from the original manufacturer or authorized distributors?

All BC848B-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 BC848B-7-F meets industry standards.

7.What is the process for return or replacement of BC848B-7-F?

All BC848B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC848B-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 BC848B-7-F part is unused and in its original packaging.

Return procedure for BC848B-7-F:

1.Submit a request within 90 days.

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

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