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

onsemi BC184C_J35Z

Name: BC184C_J35Z
Brand: onsemi
SKU: BC184C_J35Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC184C_J35Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC184C_J35Z.pdf

Description:: TRANS NPN 30V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC184C_J35Z from Fairchild Semiconductor is a silicon NPN small-signal transistor in TO-92 package, rated for V_CEO = 30 V, I_C = 500 mA, and P_C = 350 mW at T_a = 25°C. It delivers h_FE ≥ 130 at V_CE = 5 V and I_C = 100 mA, with f_T = 150 MHz, and is used in audio preamplifier stages, signal switching, and low-power linear amplification circuits.

For engineers reviewing the BC184C_J35Z datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain linearity across 10 µA–100 mA, low noise figure (4 dB at 30 Hz–15 kHz), saturation voltage performance at high drive levels, and thermal derating behavior above 25°C ambient.

Technical Context

The BC184C_J35Z operates as a general-purpose NPN bipolar junction transistor optimized for linear amplification and switching in low-voltage, low-current analog signal paths. Its h_FE range spans 100–800 depending on I_C, with stable gain at I_C = 2 mA (typ. 240) and usable bandwidth up to 150 MHz at I_C = 10 mA.

It features low output capacitance (C_OB = 5 pF at V_CE = 10 V), enabling stable high-frequency operation without external compensation. Saturation characteristics are defined at two operating points: V_CE(sat) = 0.6 V (I_C = 10 mA, I_B = 0.5 mA) and 0.25 V (I_C = 100 mA, I_B = 5 mA), supporting both small- and medium-signal switching roles.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility in ≤30 V analog stages.
I_C (DC)	500 mA - Continuous collector current limit; supports medium-drive applications like relay drivers or buffer stages.
h_FE min	130 @ V_CE = 5 V, I_C = 100 mA - Minimum guaranteed DC gain at medium current; ensures predictable bias stability.
f_T	150 MHz - Unity-gain frequency; enables RF-capable amplification up to ~30 MHz with gain margin.
V_CE(sat)	0.25 V @ I_C = 100 mA, I_B = 5 mA - Low saturation voltage reduces power loss in switching mode.
C_OB	5 pF @ V_CE = 10 V, f = 1 MHz - Minimal Miller capacitance; preserves bandwidth in common-emitter configurations.
NF	4 dB @ V_CE = 5 V, I_C = 200 µA, f = 1 kHz - Confirmed low-noise performance for sensitive preamp inputs.

Pinout & Package

BC184C_J35Z is housed in a standard through-hole TO-92 package (3-lead, epoxy molded), with lead spacing of 1.27 mm (0.05") and overall length 4.58 mm. Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter - verified per Fairchild's official package drawing and pin identification diagram.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Main current output terminal	Carries amplified load current; connects to supply rail or active load in common-emitter amplifier.
2 (Base)	Control input terminal	Receives bias current to modulate collector current; requires series resistor for current-limited drive.
3 (Emitter)	Current return path	Typically grounded or connected to emitter degeneration resistor; sets DC operating point.

Key Features

Feature	Design Value
High h_FE consistency	Min. 130 at I_C = 100 mA ensures reliable bias design without excessive base drive overhead.
Low V_CE(sat)	0.25 V at full-rated I_C minimizes conduction loss in saturated-switching applications.
Low-noise operation	4 dB NF at 1 kHz enables use in microphone preamps and sensor front-ends without added noise penalty.
Stable f_T	150 MHz gain-bandwidth product supports wideband amplification up to audio-RF transition band.
TO-92 mechanical standardization	Industry-standard footprint allows direct replacement in legacy designs using BC107/BC108/BC109 family layouts.

Applications

Audio Preamplifier Stage	Low-Voltage Switching Load
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in battery-powered voice recorders. IC Role / Device Role / Timing Role: NPN small-signal transistor configured in common-emitter topology with emitter degeneration. Use Value: Delivers >30 dB voltage gain with <4 dB noise figure at 1 kHz, preserving SNR in low-level analog chains.	Use Scenario: Driving LED indicators or small solenoids from 5 V logic outputs in industrial control panels. IC Role / Device Role / Timing Role: Saturated switch with base current limiting and collector pull-up to 5 V rail. Use Value: Achieves V_CE(sat) ≤ 0.25 V at I_C = 100 mA, reducing power dissipation to <25 mW during on-state.
RF Signal Buffer	Linear Voltage Amplifier
Use Scenario: Isolating oscillator outputs from variable capacitive loads in 27 MHz CB radio transmitter modules. IC Role / Device Role / Timing Role: Common-collector (emitter-follower) buffer stage with minimal loading effect. Use Value: f_T = 150 MHz and C_OB = 5 pF ensure stable gain flatness up to 30 MHz with <0.5 dB roll-off.	Use Scenario: Building DC-coupled gain blocks in test equipment signal conditioning paths requiring linearity over ±2 V swing. IC Role / Device Role / Timing Role: Class-A linear amplifier biased at I_C = 2 mA with fixed emitter resistor. Use Value: h_FE = 240 (typ.) at I_C = 2 mA provides predictable transconductance and low THD (<0.5%) at 1 kHz.

Audio Preamplifier Stage

Low-Voltage Switching Load

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors in battery-powered voice recorders.

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

Use Value: Delivers >30 dB voltage gain with <4 dB noise figure at 1 kHz, preserving SNR in low-level analog chains.

Use Scenario: Driving LED indicators or small solenoids from 5 V logic outputs in industrial control panels.

IC Role / Device Role / Timing Role: Saturated switch with base current limiting and collector pull-up to 5 V rail.

Use Value: Achieves V_CE(sat) ≤ 0.25 V at I_C = 100 mA, reducing power dissipation to <25 mW during on-state.

RF Signal Buffer

Linear Voltage Amplifier

Use Scenario: Isolating oscillator outputs from variable capacitive loads in 27 MHz CB radio transmitter modules.

IC Role / Device Role / Timing Role: Common-collector (emitter-follower) buffer stage with minimal loading effect.

Use Value: f_T = 150 MHz and C_OB = 5 pF ensure stable gain flatness up to 30 MHz with <0.5 dB roll-off.

Use Scenario: Building DC-coupled gain blocks in test equipment signal conditioning paths requiring linearity over ±2 V swing.

IC Role / Device Role / Timing Role: Class-A linear amplifier biased at I_C = 2 mA with fixed emitter resistor.

Use Value: h_FE = 240 (typ.) at I_C = 2 mA provides predictable transconductance and low THD (<0.5%) at 1 kHz.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC547C	V_CEO = 45 V, h_FE = 420 (min) @ I_C = 2 mA, TO-92 package, same pinout (C-B-E).	Higher voltage rating and tighter h_FE binning support wider supply rails and precision biasing.	Preferred when V_CC exceeds 30 V or when tighter h_FE tolerance is required for production matching.
2N3904	V_CEO = 40 V, I_C = 200 mA, f_T = 300 MHz, TO-92, pinout C-B-E.	Higher f_T and lower I_C rating suit fast-switching and higher-frequency small-signal use.	Chosen for digital logic interfacing or RF amplifier stages where speed outweighs current capability.

Compared with BC184C_J35Z, BC547C offers higher breakdown voltage and improved h_FE consistency for stable biasing, while 2N3904 trades current capacity for greater bandwidth-making each suitable for distinct trade-offs between voltage headroom, gain predictability, and frequency response.

Availability

BC184C_J35Z is available at Aetrix Electronics and suitable for audio preamplifiers, low-voltage switching loads, and RF signal buffers requiring stable component supply, long-term obsolescence resilience, and consistent parametric performance across production lots.

Supply support for BC184C_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

Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016. Known for robust process technology and broad portfolio coverage.

The BC184C_J35Z belongs to Fairchild's legacy BC-series silicon NPN transistor family, engineered for general-purpose linear amplification and switching in consumer, industrial, and communications equipment where reliability and parameter consistency are critical.

FAQ

What is the maximum continuous collector current for BC184C_J35Z?

The BC184C_J35Z has a maximum continuous collector current (I_C) rating of 500 mA at T_a = 25°C. Derating is required above this ambient temperature-per the datasheet, power dissipation drops linearly to zero at 150°C junction temperature. This makes BC184C_J35Z suitable for moderate-drive analog stages but not high-current switching applications.

Does BC184C_J35Z have a specified noise figure, and under what conditions?

Yes, BC184C_J35Z specifies a noise figure (NF) of 4 dB under two test conditions: at V_CE = 5 V, I_C = 200 µA, f = 1 kHz, and at V_CE = 5 V, I_C = 200 mA, R_G = 2 kΩ, f = 30 Hz–15 kHz. This dual-point characterization confirms its suitability for both low-level sensor amplification and higher-current audio paths.

What is the pin configuration of BC184C_J35Z in the TO-92 package?

BC184C_J35Z uses the standard TO-92 pinout: Pin 1 is Collector, Pin 2 is Base, Pin 3 is Emitter-viewed with flat side facing outward and leads pointing downward. This matches the BC107/BC108/BC109 family and is confirmed in Fairchild's Rev. A1 datasheet package diagram and marking layout.

Is BC184C_J35Z suitable for RF amplifier applications?

Yes, BC184C_J35Z supports RF amplifier use up to ~30 MHz due to its 150 MHz f_T and low 5 pF output capacitance (C_OB). It is commonly deployed in VHF oscillator buffers and low-power receiver IF stages. However, for >50 MHz operation or high-efficiency PA design, devices with higher f_T (e.g., 2N3904) are preferred.

How does the h_FE of BC184C_J35Z vary with collector current?

BC184C_J35Z exhibits h_FE variation across I_C: minimum 100 at I_C = 10 µA, 250 at I_C = 2 mA, and 130 at I_C = 100 mA. This non-monotonic behavior reflects typical BJT gain compression at high current-designers should select bias points within the 2–10 mA range for optimal linearity and gain stability in BC184C_J35Z circuits.

BC184C_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):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 2mA, 5V

Power - Max:: 350 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC184C_J35Z FAQ

1.How can I place an order for BC184C_J35Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC184C_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 BC184C_J35Z reliable?

The price and inventory of BC184C_J35Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC184C_J35Z is usually 5 days.

3.What payment methods are accepted for BC184C_J35Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC184C_J35Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC184C_J35Z?

BC184C_J35Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC184C_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 BC184C_J35Z?

For technical support, including BC184C_J35Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC184C_J35Z requirements.

6.How does Aetrix verify that BC184C_J35Z is sourced from the original manufacturer or authorized distributors?

All BC184C_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 BC184C_J35Z meets industry standards.

7.What is the process for return or replacement of BC184C_J35Z?

All BC184C_J35Z units undergo pre-shipment inspection (PSI). If there is an issue with BC184C_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 BC184C_J35Z part is unused and in its original packaging.

Return procedure for BC184C_J35Z:

1.Submit a request within 90 days.

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

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