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

Nexperia USA Inc. BC848B,235

Name: BC848B,235
Brand: Nexperia USA Inc.
SKU: BC848B,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC848B,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BC848B,235.pdf

Description:: TRANS NPN 30V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC848B,235 from Nexperia is an NPN general-purpose bipolar junction transistor in SOT23 (TO-236AB) surface-mount plastic package, rated for 30 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 200–450 at I_C = 2 mA, V_CE = 5 V. It serves as a low-voltage switching and small-signal amplification device in consumer power management and signal conditioning circuits.

For engineers reviewing the BC848B,235 datasheet, BC848B,235 pinout, BC848B,235 application, or BC848B,235 equivalent, this page delivers verified electrical parameters, thermal limits, SOT23 footprint details, and real-world use cases - all aligned with Nexperia's Rev. 07 (2009) product data sheet.

Technical Context

The BC848B,235 operates as a silicon NPN BJT optimized for linear amplification and saturated switching in low-power analog and digital interface stages. Its h_FE range (200–450) ensures predictable base drive requirements across production lots, while V_CE(sat) ≤ 250 mV at I_C = 10 mA / I_B = 0.5 mA supports efficient on-state conduction.

Thermal performance is defined for FR4 PCB mounting (single-sided copper, tin-plated), with R_th(j-a) = 500 K/W and P_tot = 250 mW at T_amb ≤ 25 °C. Absolute maximum ratings include V_CBO = 30 V, V_EBO = 5 V, and T_j = 150 °C - enabling reliable operation in ambient temperatures from −65 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom in 24 V rail interfaces.
I_C	100 mA - Continuous collector current rating; supports load switching up to ~80 mA in typical PCB thermal conditions.
h_FE	200–450 @ V_CE = 5 V, I_C = 2 mA - Ensures stable biasing with minimal base current variation across temperature and process spread.
V_CE(sat)	90–250 mV @ I_C = 10 mA, I_B = 0.5 mA - Low saturation voltage reduces power loss and self-heating during switching duty cycles.
P_tot	250 mW @ T_amb ≤ 25 °C - Total power dissipation limit on standard FR4 PCB; sets practical current/voltage trade-off envelope.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance; used to calculate ΔT_j rise under given power dissipation.
f_T	100 MHz @ V_CE = 5 V, I_C = 10 mA - Transition frequency confirms suitability for audio-band amplification and low-speed digital signal buffering.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, 1.3 mm × 2.9 mm body, 0.95 mm pitch, JEDEC-compliant footprint with gull-wing leads. Designed for reflow and wave soldering per Nexperia MSA439/MSA427 footprints.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires current-limited drive (e.g., 10–50 μA for 2 mA I_C) to achieve specified h_FE.
2	Emitter	Current return path; tied to ground or low-side reference; must be routed with low impedance for stable biasing.
3	Collector	Output terminal; connects to load or pull-up; voltage swing limited by V_CEO = 30 V and thermal derating above 25 °C.

Key Features

Feature	Design Value
General-purpose NPN BJT	Validated for both linear amplification (audio preamp, sensor signal gain) and saturated switching (LED drivers, logic-level translators).
SOT23 package compatibility	Standardized footprint enables automated placement and reflow; compatible with IPC-7351B Class A land patterns (MSA439).
Wide h_FE range	200–450 at I_C = 2 mA allows robust circuit design without binning - sufficient margin for worst-case β degradation over life.
Low V_CE(sat)	≤250 mV at I_C/I_B = 20 ensures <1% voltage drop across transistor in on-state, preserving output rail integrity.
High f_T	100 MHz supports bandwidth-critical applications like pulse shaping, oscillator biasing, and RF detector front-ends up to 10 MHz.

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs with current limiting via base resistor.

IC Role / Device Role / Timing Role: Low-side switch controlling LED anode-to-V_CC current path; operates in saturation mode with fast turn-on/turn-off (<100 ns).

Use Value: V_CE(sat) ≤ 250 mV minimizes LED forward voltage loss; h_FE ≥ 200 ensures <10 μA base drive suffices for full brightness control.

Use Scenario: Extending digital I/O count of resource-constrained microcontrollers using discrete transistor arrays.

IC Role / Device Role / Timing Role: Digital buffer/inverter stage translating logic levels between 1.8 V/3.3 V domains while isolating MCU pins from capacitive loads.

Use Value: f_T = 100 MHz enables clean edge response up to 10 MHz clock rates; low C_c = 2.5 pF prevents signal integrity degradation.

Audio Signal Amplifier

Power Supply Enable Switch

Use Scenario: Single-stage preamplifier for electret microphone output (10–100 mV AC signals) into ADC input.

IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter degeneration resistor; biased at I_C ≈ 1 mA for optimal noise figure (NF = 2–10 dB).

Use Value: NF = 2 dB @ I_C = 200 μA, RS = 2 kΩ enables high-SNR audio capture; h_FE stability ensures consistent gain across temperature.

Use Scenario: Enabling/disabling 12 V auxiliary rails (e.g., sensors, displays) using 3.3 V logic-controlled high-side or low-side switch.

IC Role / Device Role / Timing Role: Low-side enable switch placed between load ground and system GND; driven by MCU GPIO with RC debounce network.

Use Value: I_CM = 200 mA peak rating handles inrush currents; T_j = 150 °C rating supports operation in enclosed industrial enclosures up to 85 °C ambient.

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
BC847B,215	Same SOT23 package; h_FE = 200–450 but rated at I_C = 100 mA (same), V_CEO = 45 V (higher)	Higher V_CEO allows use in 36 V automotive subsystems where BC848B,235's 30 V limit is insufficient	Select when higher voltage margin is required without changing layout; otherwise functionally interchangeable
MMBT3904LT1G	SOT23 package; h_FE = 100–300 @ I_C = 10 mA; V_CEO = 40 V; P_tot = 310 mW	Higher power rating and wider voltage range suit higher-current switching (e.g., relay drivers), but lower h_FE demands more base drive	Choose for designs needing >250 mW dissipation or >30 V operation; verify base resistor recalculations due to h_FE distribution shift

Compared with BC848B,235, BC847B,215 offers higher voltage tolerance without footprint change, while MMBT3904LT1G trades h_FE consistency for greater power and voltage headroom - making each suitable for distinct reliability or margin-driven design priorities.

Availability

BC848B,235 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio signal amplification, and power supply enable switching requiring stable component supply across industrial, consumer, and embedded production programs.

Supply support for BC848B,235 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 essential semiconductors - including logic, discretes, MOSFETs, and ESD protection devices.

The BC848 series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-yield applications demanding consistent h_FE, low V_CE(sat), and robust SMT manufacturability.

FAQ

Is BC848B,235 RoHS compliant and halogen-free?

Yes. BC848B,235 conforms to EU RoHS Directive 2011/65/EU and Nexperia's halogen-free standard (IEC 61249-2-21), with bromine and chlorine content below 900 ppm each. Full compliance documentation is available via Nexperia's product change notices and material declarations portal.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 200 mA (single pulse, t_p ≤ 1 ms), but for continuous DC operation, I_B must be limited to ensure I_C ≤ 100 mA and P_tot ≤ 250 mW. At V_CE(sat) ≈ 200 mV and h_FE = 200, I_B should not exceed 500 μA to maintain thermal safety on standard FR4 PCB.

Can BC848B,235 replace BC848C in existing designs?

Yes, with verification. BC848C has h_FE = 420–800 (vs. BC848B's 200–450), so substitution may increase base current demand in h_FE-sensitive bias networks. If the original design uses conservative base drive (e.g., I_B ≥ 10× I_C/h_FE(min)), BC848B,235 will operate reliably - but check V_CE(sat) and thermal rise under worst-case h_FE.

Does BC848B,235 support lead-free reflow profiles?

Yes. BC848B,235 is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C (10-second duration). The SOT23 package withstands standard Pb-free thermal profiles (e.g., IPC/JEDEC J-STD-020D) without delamination or parametric shift, provided solder paste volume and preheat ramp rates follow Nexperia MSA439 guidelines.

BC848B,235 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

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 (ICBO)

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

Power - Max:: 250 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BC848B,235 FAQ

1.How can I place an order for BC848B,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC848B,235 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,235 reliable?

The price and inventory of BC848B,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848B,235 is usually 5 days.

3.What payment methods are accepted for BC848B,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848B,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC848B,235?

BC848B,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC848B,235 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,235?

For technical support, including BC848B,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848B,235 requirements.

6.How does Aetrix verify that BC848B,235 is sourced from the original manufacturer or authorized distributors?

All BC848B,235 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,235 meets industry standards.

7.What is the process for return or replacement of BC848B,235?

All BC848B,235 units undergo pre-shipment inspection (PSI). If there is an issue with BC848B,235, 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,235 part is unused and in its original packaging.

Return procedure for BC848B,235:

1.Submit a request within 90 days.

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

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