Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi BC848BWT1

Name: BC848BWT1
Brand: onsemi
SKU: BC848BWT1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BC848BWT1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC848BWT1.pdf

Description:: TRANS NPN 30V 0.1A SC70-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,313

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BC848BWT1 from onsemi is an NPN silicon general-purpose transistor in SC-70 (SOT-323) package, rated for V_CEO = 30 V, I_C = 100 mA, and h_FE = 200–450 at I_C = 2.0 mA / V_CE = 5.0 V, used in low-power signal amplification and switching circuits on compact PCBs.

For engineers reviewing the BC848BWT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal limits, package dimensions, DC gain behavior, saturation voltage performance, and real-world substitution guidance - all specific to the BC848B variant in SOT-323.

Technical Context

This device operates as a discrete NPN bipolar junction transistor optimized for linear amplification and digital switching in space-constrained surface-mount designs. Its f_T = 100 MHz supports audio and low-speed digital signal handling, while C_obo = 4.5 pF minimizes high-frequency coupling in bias networks.

The BC848BWT1 exhibits V_BE(sat) = 0.7–0.9 V at I_C/I_B = 10 and V_CE(sat) ≤ 0.6 V at I_C = 10 mA / I_B = 0.5 mA, enabling efficient low-voltage logic-level interfacing with microcontrollers and gate drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit for 24 V and lower logic/signal stages.
I_C (continuous)	100 mA - Continuous collector current rating; supports LED drivers, sensor buffers, and small-signal relay control.
h_FE	200–450 @ I_C = 2.0 mA - Guaranteed DC current gain range ensures predictable base drive sizing in amplifier and switch designs.
V_CE(sat)	≤ 0.6 V @ I_C = 10 mA / I_B = 0.5 mA - Low saturation voltage reduces power loss and improves efficiency in saturated-switch applications.
f_T	100 MHz - Current-gain bandwidth product enables stable operation up to mid-audio frequencies without unintended oscillation.
P_D (T_A = 25°C)	150 mW - Power dissipation limit on FR-5 board defines thermal derating requirements for ambient temperatures above 25°C.

Pinout & Package

BC848BWT1 uses the SC-70 (SOT-323) package - a 3-pin, surface-mount, plastic-molded case measuring 2.10 × 1.24 × 0.90 mm (L × W × H), optimized for automated placement and reflow soldering on dense PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased junction; requires current-limited drive (e.g., via 10 kΩ resistor from MCU GPIO) to achieve target I_C.
2	Emitter	Common reference node for NPN configuration; typically tied to ground or low-side return path in switching topologies.
3	Collector	Output current sink; connects to load (e.g., LED anode or relay coil) referenced to positive supply; handles up to 100 mA DC.

Key Features

Feature	Design Value
Pb-free SC-70 package	Complies with RoHS Directive 2011/65/EU; suitable for lead-free reflow profiles (peak ≤ 260°C) without reliability degradation.
Guaranteed h_FE bin (B grade)	200–450 at I_C = 2.0 mA ensures consistent gain across production lots, reducing need for per-unit calibration in analog front-ends.
Low V_BE(on)	580–770 mV @ I_C = 2.0–10 mA enables reliable turn-on with 3.3 V or 5 V logic sources without level-shifting.
Thermal resistance R_JA	833 °C/W on FR-5 board allows ~150 mW dissipation at T_A = 25°C; derates linearly to ~0 mW at T_A ≈ 107°C.

Applications

LED Driver Circuit	Microcontroller GPIO Expander
Use Scenario: Driving multiple indicator LEDs from a 3.3 V MCU with limited I/O current capability. IC Role / Device Role / Timing Role: NPN switch controlling LED cathode connection to ground; operated in saturation mode. Use Value: V_CE(sat) ≤ 0.6 V ensures >90% of supply voltage reaches LED, maximizing brightness at 10–20 mA drive levels.	Use Scenario: Adding discrete output capability to a resource-constrained microcontroller lacking sufficient GPIO pins. IC Role / Device Role / Timing Role: Level-translating buffer that converts weak MCU outputs into robust 100 mA sink signals. Use Value: h_FE ≥ 200 guarantees full saturation with ≤ 50 µA base current, preserving MCU drive strength across multiple channels.
Sensor Signal Amplifier	Low-Power Relay Interface
Use Scenario: Boosting weak analog signals from temperature or light sensors before ADC sampling. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias network and emitter degeneration. Use Value: f_T = 100 MHz and NF = 10 dB support clean amplification of DC–20 kHz sensor outputs without added noise or phase shift.	Use Scenario: Controlling 5–12 V DC relays in battery-powered industrial sensors or smart home nodes. IC Role / Device Role / Timing Role: Low-side switch activating relay coil with flyback diode protection. Use Value: V_CEO = 30 V safely accommodates relay coil back-EMF spikes up to 24 V systems, preventing premature breakdown.

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving multiple indicator LEDs from a 3.3 V MCU with limited I/O current capability.

IC Role / Device Role / Timing Role: NPN switch controlling LED cathode connection to ground; operated in saturation mode.

Use Value: V_CE(sat) ≤ 0.6 V ensures >90% of supply voltage reaches LED, maximizing brightness at 10–20 mA drive levels.

Use Scenario: Adding discrete output capability to a resource-constrained microcontroller lacking sufficient GPIO pins.

IC Role / Device Role / Timing Role: Level-translating buffer that converts weak MCU outputs into robust 100 mA sink signals.

Use Value: h_FE ≥ 200 guarantees full saturation with ≤ 50 µA base current, preserving MCU drive strength across multiple channels.

Sensor Signal Amplifier

Low-Power Relay Interface

Use Scenario: Boosting weak analog signals from temperature or light sensors before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias network and emitter degeneration.

Use Value: f_T = 100 MHz and NF = 10 dB support clean amplification of DC–20 kHz sensor outputs without added noise or phase shift.

Use Scenario: Controlling 5–12 V DC relays in battery-powered industrial sensors or smart home nodes.

IC Role / Device Role / Timing Role: Low-side switch activating relay coil with flyback diode protection.

Use Value: V_CEO = 30 V safely accommodates relay coil back-EMF spikes up to 24 V systems, preventing premature breakdown.

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
BC847BWT1	V_CEO = 45 V, V_CBO = 50 V, h_FE = 200–450 (same bin), same SC-70 package and pinout.	Higher voltage rating supports 36 V automotive or industrial bus interfaces where 30 V margin is insufficient.	Select BC847BWT1 when operating above 24 V rails or requiring higher breakdown safety margin; otherwise BC848BWT1 offers optimal cost/performance at ≤24 V.
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300 @ I_C = 10 mA, same SOT-23 package (not pin-compatible with SOT-323).	Requires PCB layout change due to different footprint; higher I_C rating (200 mA) suits heavier loads but lacks BC848B's tight h_FE bin.	Choose MMBT3904LT1G only if SOT-23 is already standardized in design and higher current or looser gain tolerance is acceptable.

Compared with BC847BWT1, BC848BWT1 trades 15 V of collector-emitter headroom for tighter h_FE consistency and lower cost in ≤24 V applications; versus MMBT3904LT1G, it retains SOT-323 compatibility and superior gain uniformity but requires dedicated layout support.

Availability

BC848BWT1 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, sensor signal amplification, and low-power relay interfaces requiring stable component supply across prototyping, pilot production, and volume manufacturing.

Supply support for BC848BWT1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BC848BWT1 belongs to the BC846/BC847/BC848 series - a family of general-purpose NPN transistors engineered for cost-sensitive, space-constrained linear and switching applications in portable and embedded electronics.

FAQ

What is the maximum continuous collector current for BC848BWT1?

The BC848BWT1 has a maximum continuous collector current (I_C) of 100 mA at T_A = 25°C. This rating assumes proper PCB thermal relief and derates linearly with ambient temperature - for example, to approximately 60 mA at T_A = 70°C based on its R_JA = 833 °C/W and P_D = 150 mW limit. Exceeding this current risks thermal runaway or permanent degradation of the BC848BWT1.

Is BC848BWT1 pin-compatible with BC847BWT1?

Yes, BC848BWT1 and BC847BWT1 share identical SC-70 (SOT-323) packaging, pin assignment (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), and mechanical dimensions. They differ only in absolute maximum ratings - specifically V_CEO (30 V vs. 45 V) and V_CBO (30 V vs. 50 V) - making them direct drop-in replacements where voltage stress remains below 30 V.

What is the guaranteed h_FE range for BC848BWT1 at typical operating conditions?

The BC848BWT1 is binned to h_FE = 200–450 when tested at I_C = 2.0 mA and V_CE = 5.0 V, per the official onsemi datasheet Rev. 5. This range is tighter than the 'C' grade (420–800) and broader than the 'A' grade (110–220), offering balanced gain predictability and cost for general-purpose amplification and switching using the BC848BWT1.

Does BC848BWT1 support Pb-free reflow soldering?

Yes, BC848BWT1 is offered in both standard and Pb-free versions (e.g., BC848BWT1G), with the latter compliant with RoHS Directive 2011/65/EU. The SC-70 package is qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds, without compromising wire bond integrity or die attach reliability of the BC848BWT1.

What is the typical noise figure of BC848BWT1 in low-level amplification?

The BC848BWT1 has a specified noise figure (NF) of ≤10 dB when measured at I_C = 0.2 mA, V_CE = 5.0 V, R_S = 2.0 kΩ, f = 1.0 kHz, and BW = 200 Hz. This makes the BC848BWT1 suitable for low-noise preamplification of weak sensor signals - such as thermistor or photodiode outputs - where preserving signal-to-noise ratio is critical before further processing.

BC848BWT1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 150 mW

Frequency - Transition:: 100MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-3 (SOT323)

BC848BWT1 FAQ

1.How can I place an order for BC848BWT1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC848BWT1 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 BC848BWT1 reliable?

The price and inventory of BC848BWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848BWT1 is usually 5 days.

3.What payment methods are accepted for BC848BWT1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848BWT1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC848BWT1?

BC848BWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC848BWT1 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 BC848BWT1?

For technical support, including BC848BWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848BWT1 requirements.

6.How does Aetrix verify that BC848BWT1 is sourced from the original manufacturer or authorized distributors?

All BC848BWT1 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 BC848BWT1 meets industry standards.

7.What is the process for return or replacement of BC848BWT1?

All BC848BWT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC848BWT1, 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 BC848BWT1 part is unused and in its original packaging.

Return procedure for BC848BWT1:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…