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

onsemi BC547B_S00Z

Name: BC547B_S00Z
Brand: onsemi
SKU: BC547B_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC547B_S00Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: BC547B_S00Z.pdf

Description:: TRANS NPN 50V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC547B_S00Z from ON Semiconductor is a general-purpose NPN epitaxial silicon transistor used for low-power switching and amplification in discrete analog and digital circuits. It features V_CEO = 45 V, I_C = 100 mA, h_FE = 200–450 (Class B), f_T = 300 MHz, and TO-92 package - commonly deployed in signal conditioning stages of sensor interfaces and LED driver bias networks.

For engineers reviewing the BC547B_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain tolerance, saturation voltage at defined I_B/I_C, noise figure in audio preamp use, and thermal derating above 25°C ambient.

Technical Context

This device operates as a single-element bipolar junction transistor with fixed emitter-base-collector topology. Its h_FE classification (B) guarantees minimum DC current gain of 200 at V_CE = 5 V and I_C = 2 mA, and maximum of 450 under same conditions. Saturation behavior is characterized at two operating points: V_CE(sat) ≤ 250 mV at I_C = 10 mA/I_B = 0.5 mA, and ≤ 600 mV at I_C = 100 mA/I_B = 5 mA.

Thermal limits are defined by T_J = 150°C maximum junction temperature and P_C = 500 mW total power dissipation at 25°C ambient. Device capacitance includes C_ob = 3.5–6.0 pF at V_CB = 10 V and C_ib = 9 pF at V_EB = 0.5 V, supporting stable operation up to 300 MHz f_T.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in low-voltage switching rails.
I_C (DC)	100 mA - Continuous collector current limit; sets upper bound for load-driving capability in linear or saturated mode.
h_FE Class	B (200–450) - Guaranteed DC current gain spread at V_CE = 5 V, I_C = 2 mA; enables predictable base drive sizing.
f_T	300 MHz - Current gain-bandwidth product at V_CE = 5 V, I_C = 10 mA; supports RF amplifier and fast-switching applications.
V_CE(sat)	≤250 mV @ I_C=10 mA/I_B=0.5 mA - Low saturation voltage ensures minimal conduction loss in switch-mode operation.
P_C	500 mW @ T_A=25°C - Total power dissipation limit; requires thermal derating above ambient per datasheet curve.
NF	2.0–10.0 dB @ V_CE=5 V, I_C=200 μA, f=1 kHz - Noise figure range suitable for low-level audio preamplifier stages.

Pinout & Package

BC547B_S00Z is housed in a standard JEDEC TO-92 3-lead plastic package with straight leads (bulk format). Pin assignment follows conventional configuration: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Main current output terminal	Connected to higher-potential rail or load; carries full collector current; thermally coupled to die substrate.
2 (Base)	Control input terminal	Receives forward-biased current to modulate collector-emitter conduction; requires current-limiting resistor in most designs.
3 (Emitter)	Current return path	Typically tied to ground or low-side reference; provides common return for base and collector currents.

Key Features

Feature	Design Value
Switching & amplification dual-use	Validated across linear (small-signal gain) and saturated (on/off control) modes per datasheet test conditions.
Low-noise performance	2.0–10.0 dB noise figure at 1 kHz enables use in microphone preamps and sensor signal chains without added noise floor.
High-voltage tolerance	V_CEO = 45 V allows direct interface with 24 V industrial logic and relay drivers without level-shifting.
TO-92 mechanical compatibility	Standardized footprint enables drop-in replacement with BC546/BC548/BC549 variants and legacy Fairchild parts.
Complementary PNP pairing	Designed as NPN counterpart to BC557/BC558 series, enabling matched push-pull output stages.

Applications

Audio Preamp Stage	Sensor Signal Conditioning
Use Scenario: Amplifying low-amplitude signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: Small-signal NPN amplifier configured in common-emitter topology with emitter degeneration. Use Value: 200–450 h_FE and 2.0–10.0 dB noise figure ensure adequate voltage gain and minimal signal-to-noise degradation at audio frequencies.	Use Scenario: Converting high-impedance sensor outputs (e.g., thermistors, photodiodes) into low-impedance current-mode signals. IC Role / Device Role / Timing Role: Transimpedance or current-buffering stage with fixed bias network. Use Value: Low V_CE(sat) ≤250 mV and stable h_FE enable accurate current mirroring and linearity over temperature.
LED Driver Bias Control	Logic-Level Interface Translation
Use Scenario: Switching indicator LEDs or low-current status lights in microcontroller-based systems. IC Role / Device Role / Timing Role: Saturated switch controlling LED anode/cathode current path. Use Value: I_C = 100 mA rating and V_CE(sat) ≤250 mV minimize power loss and heat generation during continuous on-state.	Use Scenario: Level-shifting between 3.3 V MCU GPIO and 5 V peripheral logic inputs. IC Role / Device Role / Timing Role: Inverting buffer with pull-up resistor on collector to translate logic thresholds. Use Value: Fast f_T = 300 MHz and low C_ib/C_ob support clean edge transitions up to 10 MHz without ringing or delay distortion.

Audio Preamp Stage

Sensor Signal Conditioning

Use Scenario: Amplifying low-amplitude signals from electret microphones or piezoelectric sensors before ADC sampling.

IC Role / Device Role / Timing Role: Small-signal NPN amplifier configured in common-emitter topology with emitter degeneration.

Use Value: 200–450 h_FE and 2.0–10.0 dB noise figure ensure adequate voltage gain and minimal signal-to-noise degradation at audio frequencies.

Use Scenario: Converting high-impedance sensor outputs (e.g., thermistors, photodiodes) into low-impedance current-mode signals.

IC Role / Device Role / Timing Role: Transimpedance or current-buffering stage with fixed bias network.

Use Value: Low V_CE(sat) ≤250 mV and stable h_FE enable accurate current mirroring and linearity over temperature.

LED Driver Bias Control

Logic-Level Interface Translation

Use Scenario: Switching indicator LEDs or low-current status lights in microcontroller-based systems.

IC Role / Device Role / Timing Role: Saturated switch controlling LED anode/cathode current path.

Use Value: I_C = 100 mA rating and V_CE(sat) ≤250 mV minimize power loss and heat generation during continuous on-state.

Use Scenario: Level-shifting between 3.3 V MCU GPIO and 5 V peripheral logic inputs.

IC Role / Device Role / Timing Role: Inverting buffer with pull-up resistor on collector to translate logic thresholds.

Use Value: Fast f_T = 300 MHz and low C_ib/C_ob support clean edge transitions up to 10 MHz without ringing or delay distortion.

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
BC547C_S00Z	Higher h_FE range (420–800) vs. BC547B_S00Z's 200–450; otherwise identical ratings.	Preferred where tighter base drive control or lower base current is required (e.g., battery-powered sensor nodes).	Select BC547C_S00Z only if gain consistency at low I_C is critical; may require revalidation of saturation margin.
2N3904	V_CEO = 40 V (vs. 45 V); h_FE = 100–300 (Class A/B); f_T = 300 MHz; same TO-92 package.	Widely available but lower max V_CEO; acceptable in ≤40 V systems with relaxed gain tolerance.	Use 2N3904 when supply voltage stays below 40 V and design tolerates wider h_FE variation.

Compared with BC547C_S00Z and 2N3904, BC547B_S00Z offers optimal balance of gain predictability (200–450), 45 V breakdown margin, and proven stability in industrial sensor and LED drive roles - making it preferred for designs requiring consistent saturation behavior across production lots.

Availability

BC547B_S00Z is available at Aetrix Electronics and suitable for audio preamplifiers, sensor signal conditioners, LED driver circuits, and logic-level translators requiring stable component supply and long-term manufacturability.

Supply support for BC547B_S00Z 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete devices for automotive, industrial, and consumer markets.

The BC547B_S00Z belongs to ON Semiconductor's legacy general-purpose bipolar transistor family, designed for cost-sensitive, high-reliability discrete signal amplification and switching in non-critical industrial and consumer electronics.

FAQ

What is the pin configuration of BC547B_S00Z?

The BC547B_S00Z uses a standard TO-92 package with pinout: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter. This configuration is consistent across all BC546–BC550 variants and verified in Fairchild/ON Semiconductor datasheet Figure 7 and ordering table footnotes.

Does BC547B_S00Z support linear amplification applications?

Yes, BC547B_S00Z supports linear amplification with verified small-signal parameters: h_FE = 200–450 at I_C = 2 mA, f_T = 300 MHz, and NF = 2.0–10.0 dB at 1 kHz. These values are measured under linear operating conditions and documented in the official datasheet Electrical Characteristics table.

What is the maximum junction temperature for BC547B_S00Z?

The absolute maximum junction temperature (T_J) for BC547B_S00Z is 150°C, as specified in the Absolute Maximum Ratings table. Derating is required above 25°C ambient per the thermal resistance curve in the datasheet's Typical Performance Characteristics section.

Is BC547B_S00Z RoHS compliant?

Yes, BC547B_S00Z is RoHS compliant. ON Semiconductor confirms compliance for this part number in its official product change notices and environmental compliance documentation accessible via www.onsemi.com under Product Compliance Reports.

Can BC547B_S00Z replace BC547B without modification?

Yes, BC547B_S00Z is the updated ON Semiconductor designation for the legacy Fairchild BC547B, resulting from underscore-to-dash nomenclature alignment post-acquisition. Electrical specs, package, and pinout are identical - no PCB or schematic changes are needed for migration.

BC547B_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

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

Current - Collector Cutoff (Max):: 15nA (ICBO)

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

Power - Max:: 500 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC547B_S00Z FAQ

1.How can I place an order for BC547B_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC547B_S00Z 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 BC547B_S00Z reliable?

The price and inventory of BC547B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC547B_S00Z is usually 5 days.

3.What payment methods are accepted for BC547B_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC547B_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC547B_S00Z?

BC547B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC547B_S00Z 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 BC547B_S00Z?

For technical support, including BC547B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC547B_S00Z requirements.

6.How does Aetrix verify that BC547B_S00Z is sourced from the original manufacturer or authorized distributors?

All BC547B_S00Z 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 BC547B_S00Z meets industry standards.

7.What is the process for return or replacement of BC547B_S00Z?

All BC547B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with BC547B_S00Z, 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 BC547B_S00Z part is unused and in its original packaging.

Return procedure for BC547B_S00Z:

1.Submit a request within 90 days.

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

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