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onsemi BC548C_J35Z
- Part No.:
- BC548C_J35Z
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
BC548C_J35Z.pdf
- Description:
- TRANS NPN 30V 0.1A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,699
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Product details
Overview
BC548C_J35Z from ON Semiconductor is a general-purpose NPN epitaxial silicon transistor in TO-92 package, rated for VCEO = 30 V, IC = 100 mA, and hFE = 420–800 (Class C), optimized for low-noise amplification and medium-speed switching in analog and digital circuits.
For engineers reviewing the BC548C_J35Z datasheet, pinout, applications, or equivalent options, this part serves as a cost-effective, through-hole discrete solution where DC gain stability, low saturation voltage, and proven JEDEC-compliant reliability are required in consumer, industrial, and educational electronics.
Technical Context
This device operates as a single NPN bipolar junction transistor with fixed emitter-base and collector-base junction geometry. Its hFE classification (C-grade) ensures minimum DC current gain of 420 at IC = 2 mA and VCE = 5 V, and its fT = 300 MHz supports audio-frequency amplification and sub-MHz switching.
Designed for linear and saturated-mode operation, BC548C_J35Z exhibits VCE(sat) ≤ 250 mV at IC = 10 mA / IB = 0.5 mA and VBE(on) = 580–700 mV under same conditions - enabling predictable biasing in common-emitter amplifier and switch configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage before breakdown; defines usable supply headroom in low-voltage amplifier stages. |
| IC (DC) | 100 mA - Continuous collector current limit; sets maximum load drive capability in switching applications. |
| hFE (min–max) | 420–800 - Guaranteed DC current gain range at 2 mA/5 V; enables stable bias design without gain-dependent instability. |
| fT | 300 MHz - Unity-gain bandwidth; supports high-fidelity audio amplification up to ~100 kHz with margin. |
| VCE(sat) | ≤250 mV @ IC=10 mA/IB=0.5 mA - Low saturation voltage reduces power loss and heat generation in switching mode. |
| PC | 500 mW - Maximum dissipation at 25°C ambient; requires derating above 25°C per thermal resistance spec. |
Pinout & Package
BC548C_J35Z is housed in a standard JEDEC TO-92 3-lead plastic package with straight leads (bulk or ammo packaging). Pin identification follows conventional orientation: lead facing flat side, pins down, left-to-right = Collector (1), Base (2), Emitter (3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Collector | Main current output terminal | Connected to load or supply rail; must remain within VCBO = 30 V and PC limits during operation. |
| 2 - Base | Control input terminal | Receives forward-biased current to enable conduction; requires series resistor to limit IB and prevent thermal runaway. |
| 3 - Emitter | Current return path | Typically grounded or tied to reference node; establishes common point for bias network and signal return. |
Key Features
| Feature | Design Value |
|---|---|
| Class C hFE grading | Guaranteed 420–800 gain at 2 mA/5 V enables consistent bias point selection across production lots. |
| Low VCE(sat) | ≤250 mV at 10 mA/0.5 mA reduces conduction loss and improves efficiency in saturated-switch applications. |
| JEDEC TO-92 compliance | Standardized mechanical footprint ensures compatibility with legacy PCB footprints and automated assembly tooling. |
| 150°C max junction temperature | Supports reliable operation in enclosed or thermally constrained environments with appropriate board-level heatsinking. |
Applications
| Audio Pre-Amplifier Stage | LED Driver Switch |
|---|---|
|
Use Scenario: Amplifying weak microphone or sensor signals in battery-powered portable audio devices. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with emitter degeneration. Use Value: Class C hFE ensures stable gain across units; fT = 300 MHz provides ample bandwidth for full audio spectrum (20 Hz–20 kHz) with margin. |
Use Scenario: Driving indicator or status LEDs in industrial control panels and instrumentation displays. IC Role / Device Role / Timing Role: Saturated NPN switch controlling LED anode current via collector connection. Use Value: VCE(sat) ≤ 250 mV minimizes voltage drop and power loss, extending battery life and reducing thermal stress on PCB traces. |
| Signal Level Shifter | Relay Driver Interface |
|
Use Scenario: Translating logic-level signals between 3.3 V microcontrollers and 5 V peripheral buses. IC Role / Device Role / Timing Role: Common-emitter level translator with base resistor network and pull-up on collector. Use Value: VCEO = 30 V safely accommodates 5 V bus rails; hFE ≥ 420 ensures robust turn-on with minimal base drive current. |
Use Scenario: Isolating and amplifying MCU GPIO outputs to energize 5–12 V electromagnetic relay coils. IC Role / Device Role / Timing Role: Medium-current NPN driver stage with flyback diode protection. Use Value: IC = 100 mA rating covers typical relay coil currents (20–70 mA); TO-92 package allows manual prototyping and field repairability. |
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 | Same TO-92 package and hFE class (420–800), but VCEO = 45 V vs. BC548C_J35Z's 30 V. | Higher voltage headroom enables use in 36 V systems where BC548C_J35Z would be marginal. | Select BC547C when operating above 30 V collector supply; otherwise BC548C_J35Z offers tighter gain consistency in 5–24 V designs. |
| 2N3904 | TO-92 package, VCEO = 40 V, hFE = 100–300 (standard grade), fT = 300 MHz, but no Class C grading. | Lacks guaranteed high-gain binning; suitable for non-critical gain-stable designs. | Choose 2N3904 for cost-sensitive, non-amplifier applications where precise hFE is not required. |
Compared with BC547C and 2N3904, BC548C_J35Z delivers tighter hFE control (420–800) at lower VCEO, making it optimal for gain-critical, low-voltage amplifier stages where predictability outweighs voltage margin.
Availability
BC548C_J35Z is available at Aetrix Electronics and suitable for audio pre-amplifiers, LED drivers, level shifters, and relay interface circuits requiring stable component supply, long-term manufacturability, and JEDEC-standard through-hole compatibility.
Supply support for BC548C_J35Z 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, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.
BC548C_J35Z belongs to the legacy BC546–BC550 family originally developed by Fairchild and now maintained by ON Semiconductor for general-purpose discrete amplification and switching in cost-sensitive, reliability-focused applications.
FAQ
What is the pin configuration of BC548C_J35Z?
The BC548C_J35Z uses a standard TO-92 package with pinout: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter - verified per JEDEC TO-92 straight-lead configuration and confirmed in Fairchild's original datasheet Rev. 1.1.1. This arrangement is consistent across all BC546–BC550 variants.
What does the "_J35Z" suffix indicate in BC548C_J35Z?
The "_J35Z" suffix is a Fairchild-specific date/batch code indicating manufacturing week/year and internal traceability; it carries no electrical or functional difference from standard BC548C. ON Semiconductor maintains full compatibility and specifications for BC548C_J35Z as a BC548C variant.
Is BC548C_J35Z RoHS compliant?
Yes, BC548C_J35Z meets RoHS Directive 2011/65/EU requirements as confirmed by ON Semiconductor's material declarations and compliance documentation. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
Can BC548C_J35Z replace BC548B in existing designs?
Yes, BC548C_J35Z can directly replace BC548B in most applications because both share identical package, pinout, and absolute maximum ratings; however, BC548C_J35Z has higher guaranteed hFE (420–800 vs. 200–450), which may affect bias point stability in gain-sensitive circuits.
What is the maximum operating temperature for BC548C_J35Z?
The BC548C_J35Z has a maximum junction temperature (TJ) of 150°C and a storage temperature range of –65°C to +150°C. Derating begins at 25°C ambient, with thermal resistance RθJA ≈ 200°C/W typical for TO-92 in still air - requiring layout attention for sustained >100 mW dissipation.
BC548C_J35Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Bulk
- 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:
- 420 @ 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
BC548C_J35Z FAQ
1.How can I place an order for BC548C_J35Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BC548C_J35Z 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 BC548C_J35Z reliable?
The price and inventory of BC548C_J35Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC548C_J35Z is usually 5 days.
3.What payment methods are accepted for BC548C_J35Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC548C_J35Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC548C_J35Z?
BC548C_J35Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC548C_J35Z 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 BC548C_J35Z?
For technical support, including BC548C_J35Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC548C_J35Z requirements.
6.How does Aetrix verify that BC548C_J35Z is sourced from the original manufacturer or authorized distributors?
All BC548C_J35Z 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 BC548C_J35Z meets industry standards.
7.What is the process for return or replacement of BC548C_J35Z?
All BC548C_J35Z units undergo pre-shipment inspection (PSI). If there is an issue with BC548C_J35Z, 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 BC548C_J35Z part is unused and in its original packaging.
Return procedure for BC548C_J35Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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