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onsemi BC547BZL1
- Part No.:
- BC547BZL1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
BC547BZL1.pdf
- Description:
- TRANS NPN 45V 0.1A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
BC547BZL1 from ON Semiconductor is an NPN silicon general-purpose amplifier transistor in TO-92 package, rated for VCEO = 45 V, IC = 100 mA, and hFE = 200–450 (at IC = 2 mA, VCE = 5 V). It delivers low VCE(sat) = 0.25 V (at IC = 10 mA, IB = 0.5 mA) and fT = 300 MHz, commonly used in audio preamplifier stages and signal switching circuits.
For engineers reviewing the BC547BZL1 datasheet, pinout, applications, or equivalent options, key selection considerations include its DC current gain range, saturation voltage under defined drive conditions, thermal resistance (RJA = 200 °C/W), and TO-92 mechanical compatibility with legacy through-hole PCB layouts.
Technical Context
The BC547BZL1 operates as a discrete bipolar junction transistor optimized for linear amplification and low-speed switching. Its hFE binning (B-grade) guarantees minimum DC current gain of 200 at IC = 2 mA and VCE = 5 V, with typical fT = 300 MHz ensuring usable bandwidth in audio and low-frequency RF applications. The device features VBREBO = 6.0 V and Cobo = 1.7 pF, supporting stable biasing and minimal Miller effect in common-emitter configurations.
Thermal design is constrained by RJA = 200 °C/W and RJC = 83.3 °C/W, requiring careful attention to ambient temperature and PCB copper area when operating near PD = 625 mW (TA = 25°C). Junction temperature must remain within −55°C to +150°C, with derating applied above 25°C at 5.0 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage headroom in amplifier rails. |
| IC | 100 mA - Continuous collector current limit; sets upper bound for load-driving capability in switching or active loads. |
| hFE | 200–450 - DC current gain range at IC = 2 mA, VCE = 5 V; determines base drive requirements and bias stability. |
| VCE(sat) | 0.25 V - Saturation voltage at IC = 10 mA, IB = 0.5 mA; impacts power loss and logic-level compatibility in switch mode. |
| fT | 300 MHz - Current-gain bandwidth product; supports audio amplification and low-MHz signal conditioning without instability. |
| RJA | 200 °C/W - Junction-to-ambient thermal resistance; requires ≥1 cm² copper pour for full-power operation at room ambient. |
Pinout & Package
BC547BZL1 uses the industry-standard TO-92 (Case 29, Style 17) plastic package with 3 leads, designed for through-hole mounting and manual soldering. Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter - verified per ON Semiconductor marking diagram and package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Collector) | Main output current terminal | Carries amplified load current; connects to supply rail or pull-up resistor in common-emitter configuration. |
| 2 (Base) | Control input terminal | Accepts bias current to modulate collector current; requires series resistor to limit drive and ensure hFE-based gain stability. |
| 3 (Emitter) | Reference/return terminal | Typically grounded or connected to emitter degeneration resistor; establishes DC operating point and AC signal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free TO-92 packaging | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow and hand-soldering processes. |
| Guaranteed hFE bin (B grade) | 200–450 at IC = 2 mA ensures predictable base drive sizing and reduces need for gain compensation in production. |
| Low VCE(sat) | 0.25 V enables efficient switching in 5 V logic interfaces and minimizes power dissipation in saturated operation. |
| High fT | 300 MHz supports wideband audio amplification and fast edge response in pulse applications up to ~50 MHz. |
| −55°C to +150°C operation | Enables deployment in automotive under-hood, industrial control, and outdoor equipment without derating penalties. |
Applications
| Audio Preamp Stage | LED Driver Switch |
|---|---|
|
Use Scenario: Low-noise voltage amplification of microphone or line-level signals prior to ADC sampling. IC Role / Device Role / Timing Role: Discrete NPN transconductance amplifier in common-emitter topology with emitter degeneration. Use Value: hFE = 200–450 and NF = 2.0 dB (at IC = 0.2 mA) enable high SNR and stable gain without feedback complexity. |
Use Scenario: Digital on/off control of indicator or status LEDs from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated switch with base-driven current limiting. Use Value: VCE(sat) = 0.25 V ensures <10 mW dissipation at 20 mA LED current, eliminating need for heat sinking. |
| Signal Level Shifter | Relay Driver Interface |
|
Use Scenario: Translating 3.3 V logic outputs to 5 V or 12 V domains for sensor or peripheral interfacing. IC Role / Device Role / Timing Role: Common-emitter level translator with pull-up to higher rail. Use Value: VCEO = 45 V provides 3× margin over 12 V systems, preventing breakdown during transient coupling. |
Use Scenario: Driving 5 V or 12 V relay coils from low-current MCU outputs. IC Role / Device Role / Timing Role: High-gain current amplifier isolating controller from inductive load. Use Value: hFE ≥ 200 allows 5 mA base drive to switch 100 mA coil current, reducing MCU pin loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC547CZL1 | Higher hFE bin (420–800 at IC = 2 mA); otherwise identical ratings and package. | Better suited for ultra-low-base-drive designs (e.g., battery-powered sensors), but may require tighter bias stability controls. | Select BC547CZL1 only if gain >400 is required and thermal drift compensation is implemented. |
| 2N3904RLRPG | Lower VCEO = 40 V, same IC = 200 mA, hFE = 100–300, TO-92 package, Pb-free. | Marginally lower voltage rating limits use in 36 V+ supplies; higher IC supports heavier loads but increases saturation loss. | Choose 2N3904RLRPG where cost sensitivity outweighs 5 V VCEO margin and higher IC is unused. |
Compared with BC547CZL1 and 2N3904RLRPG, the BC547BZL1 offers balanced gain (200–450), robust 45 V rating, and proven thermal performance in TO-92-making it optimal for cost-sensitive, medium-voltage analog and interface circuits where predictable hFE and low saturation loss are prioritized.
Availability
BC547BZL1 is available at Aetrix Electronics and suitable for audio signal conditioning, LED switching, level translation, and relay driving applications requiring stable component supply across industrial, consumer, and prototyping environments.
Supply support for BC547BZL1 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 power management, analog, sensor, and discrete solutions for automotive, industrial, and consumer markets.
The BC547BZL1 belongs to ON Semiconductor's legacy BC546–BC548 family of general-purpose NPN transistors, engineered for reliability, consistency, and broad compatibility in linear amplification and switching roles across decades of electronics design.
FAQ
What is the maximum collector-emitter voltage rating for BC547BZL1?
The BC547BZL1 has a guaranteed VCEO rating of 45 VDC, meaning it can safely withstand up to 45 volts between collector and emitter with base open. This rating is validated per ON Semiconductor's BC546/D datasheet Rev. 5 and applies directly to the BC547BZL1 variant. Exceeding this voltage risks avalanche breakdown and permanent device failure.
Does BC547BZL1 have a Pb-free construction?
Yes, BC547BZL1 is manufactured with Pb-free materials and complies with RoHS Directive 2011/65/EU. Its TO-92 package uses lead-free molding compound and termination plating, confirmed in ON Semiconductor's ordering information table and Pb-Free strategy documentation referenced in the BC546/D datasheet.
What is the DC current gain (hFE) range specified for BC547BZL1?
The BC547BZL1 is binned to the "B" gain group, with hFE guaranteed between 200 and 450 when tested at IC = 2 mA and VCE = 5 V, per the Electrical Characteristics table in the BC546/D datasheet. This range reflects production-tested minimum and maximum values-not typical or average figures.
Can BC547BZL1 be used in switching applications?
Yes, BC547BZL1 is routinely used in switching applications such as LED drivers and relay interfaces. Its VCE(sat) = 0.25 V (at IC = 10 mA, IB = 0.5 mA) and fast fT = 300 MHz support reliable saturation and turn-off behavior up to ~100 kHz. Ensure base drive meets hFE-based current requirements and include flyback protection for inductive loads.
What package type and pin configuration does BC547BZL1 use?
BC547BZL1 uses the TO-92 (Case 29, Style 17) package with standardized pinout: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter. This configuration is explicitly documented in the marking diagram and package dimensions section of the BC546/D datasheet and verified across ON Semiconductor's BC547x ordering table.
BC547BZL1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 15nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92 (TO-226)
BC547BZL1 FAQ
1.How can I place an order for BC547BZL1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC547BZL1 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 BC547BZL1 reliable?
The price and inventory of BC547BZL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC547BZL1 is usually 5 days.
3.What payment methods are accepted for BC547BZL1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC547BZL1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC547BZL1?
BC547BZL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC547BZL1 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 BC547BZL1?
For technical support, including BC547BZL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC547BZL1 requirements.
6.How does Aetrix verify that BC547BZL1 is sourced from the original manufacturer or authorized distributors?
All BC547BZL1 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 BC547BZL1 meets industry standards.
7.What is the process for return or replacement of BC547BZL1?
All BC547BZL1 units undergo pre-shipment inspection (PSI). If there is an issue with BC547BZL1, 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 BC547BZL1 part is unused and in its original packaging.
Return procedure for BC547BZL1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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