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

onsemi BC183_J35Z

Name: BC183_J35Z
Brand: onsemi
SKU: BC183_J35Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC183_J35Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC183_J35Z.pdf

Description:: TRANS NPN 30V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC183_J35Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor used for low-power amplification and switching in analog and digital circuits, with V_CEO = 30 V, I_C = 100 mA, P_C = 350 mW, h_FE = 40–80 at I_C = 100 mA, and f_T = 150 MHz - deployed in audio preamplifiers, signal conditioning stages, and discrete logic interface circuits.

For engineers reviewing the BC183_J35Z datasheet, pinout, applications, or equivalent options, key selection considerations include DC current gain linearity across collector current, saturation voltage behavior under varying drive conditions, thermal derating at elevated ambient temperatures, and TO-92 mechanical compatibility in space-constrained PCB layouts.

Technical Context

The BC183_J35Z operates as a silicon NPN BJT with epitaxial planar construction, optimized for linear amplification and moderate-speed switching. Its h_FE range (40–80) and low V_CE(sat) (0.25–0.6 V) support stable biasing in Class-A amplifier stages and saturated-switch operation in low-current digital interfaces.

It features low noise figure (NF = 10 dB at I_C = 200 mA), COB = 5 pF at V_CE = 10 V, and specified performance across −40°C to +125°C junction temperature - enabling use in industrial-grade analog front-ends where gain consistency and thermal stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - maximum allowable collector-emitter voltage before breakdown; defines safe operating voltage headroom in low-voltage amplifier rails.
I_C	100 mA - continuous DC collector current rating; sets upper limit for load-driving capability in switching or active-load configurations.
P_C	350 mW at T_A = 25°C - power dissipation limit; requires thermal derating above 25°C ambient per published curves.
h_FE	40–80 at V_CE = 5 V, I_C = 100 mA - DC current gain range; determines base drive requirements for predictable saturation or linear operation.
f_T	150 MHz - transition frequency; indicates usable bandwidth for small-signal amplification up to mid-VHF range.
V_BE(on)	0.55–0.7 V at V_CE = 5 V, I_C = 2 mA - forward base-emitter turn-on voltage; critical for bias network design and input threshold referencing.
COB	5 pF at V_CE = 10 V, f = 1 MHz - output capacitance; impacts high-frequency response and stability in tuned or RF-coupled stages.

Pinout & Package

BC183_J35Z is housed in a standard through-hole TO-92 package with 3 leads: Collector (Lead 1), Base (Lead 2), Emitter (Lead 3). The package supports manual soldering, wave soldering, and provides adequate thermal conduction for ≤350 mW dissipation at board-level mounting.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Main current output terminal	Connected to load or supply rail; carries full collector current and must be routed with appropriate trace width for thermal and current handling.
2 (Base)	Control input terminal	Receives bias current to regulate collector-emitter conduction; requires series resistance to limit drive and prevent thermal runaway.
3 (Emitter)	Current return path	Typically grounded or connected to emitter resistor for stable DC biasing; forms reference node for input/output coupling networks.

Key Features

Feature	Design Value
Low V_CE(sat)	0.25 V typical at I_C = 10 mA / I_B = 0.5 mA - enables efficient saturated switching with minimal voltage drop and power loss.
High f_T	150 MHz - supports amplification of signals up to ~100 MHz with usable gain, suitable for RF detector and IF amplifier applications.
Wide h_FE range	40–80 - accommodates production variation while maintaining functional margin in fixed-bias designs without feedback.
Low noise figure	10 dB at I_C = 200 mA - improves signal-to-noise ratio in low-level analog amplification, especially in microphone preamp inputs.
TO-92 mechanical standardization	Compatible with legacy socketing, automated insertion, and hand-soldering workflows - reduces assembly cost and rework time.

Applications

Audio Preamp Stage	Discrete Logic Level Shifter
Use Scenario: Amplifying weak microphone or sensor signals prior to ADC sampling in portable instrumentation. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology providing 20–40 dB voltage gain with low distortion. Use Value: V_BE(on) tolerance (0.55–0.7 V) and h_FE stability enable repeatable gain calibration across units without trimming.	Use Scenario: Converting 3.3 V logic outputs to drive 5 V TTL-compatible inputs in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: Saturated switch translating logic states with fast turn-on/turn-off due to low C_OB and moderate f_T. Use Value: V_CE(sat) ≤ 0.6 V ensures <100 mV residual drop, preserving noise margin on driven 5 V inputs.
Industrial Sensor Interface	LED Driver (Low Current)
Use Scenario: Conditioning output from resistive temperature detectors (RTDs) or strain gauges in factory automation modules. IC Role / Device Role / Timing Role: Transimpedance or emitter-follower buffer stage delivering low-output-impedance drive to ADC reference or multiplexer inputs. Use Value: Low NF (10 dB) and stable h_FE over −40°C to +125°C ensure consistent signal fidelity across environmental extremes.	Use Scenario: Driving indicator LEDs or status lamps in control panels requiring <100 mA per channel. IC Role / Device Role / Timing Role: Constant-current switch with base-resistor biasing, operating in saturation to minimize heat generation. Use Value: P_C = 350 mW and I_C = 100 mA allow reliable 20–50 mA LED drive without heatsinking in enclosed enclosures.

Audio Preamp Stage

Discrete Logic Level Shifter

Use Scenario: Amplifying weak microphone or sensor signals prior to ADC sampling in portable instrumentation.

IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology providing 20–40 dB voltage gain with low distortion.

Use Value: V_BE(on) tolerance (0.55–0.7 V) and h_FE stability enable repeatable gain calibration across units without trimming.

Use Scenario: Converting 3.3 V logic outputs to drive 5 V TTL-compatible inputs in mixed-voltage microcontroller systems.

IC Role / Device Role / Timing Role: Saturated switch translating logic states with fast turn-on/turn-off due to low C_OB and moderate f_T.

Use Value: V_CE(sat) ≤ 0.6 V ensures <100 mV residual drop, preserving noise margin on driven 5 V inputs.

Industrial Sensor Interface

LED Driver (Low Current)

Use Scenario: Conditioning output from resistive temperature detectors (RTDs) or strain gauges in factory automation modules.

IC Role / Device Role / Timing Role: Transimpedance or emitter-follower buffer stage delivering low-output-impedance drive to ADC reference or multiplexer inputs.

Use Value: Low NF (10 dB) and stable h_FE over −40°C to +125°C ensure consistent signal fidelity across environmental extremes.

Use Scenario: Driving indicator LEDs or status lamps in control panels requiring <100 mA per channel.

IC Role / Device Role / Timing Role: Constant-current switch with base-resistor biasing, operating in saturation to minimize heat generation.

Use Value: P_C = 350 mW and I_C = 100 mA allow reliable 20–50 mA LED drive without heatsinking in enclosed enclosures.

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
BC547B	Higher h_FE (200–450), same TO-92 package, V_CEO = 45 V, P_C = 500 mW	Better suited for high-gain, low-drive applications; less ideal where gain predictability across batch is prioritized.	Select BC547B when higher DC gain or increased voltage margin is required; verify bias network stability with wider h_FE spread.
2N3904	Lower P_C = 300 mW, V_CEO = 40 V, h_FE = 100–300, identical pinout and footprint	More widely available but exhibits greater h_FE variability; may require tighter binning for precision gain matching.	Choose 2N3904 for cost-sensitive, high-volume consumer designs where absolute gain consistency is secondary to availability and unit cost.

Compared with BC183_J35Z, BC547B offers higher gain and power margin but reduced gain uniformity, while 2N3904 trades slightly lower power rating for broader global distribution and tighter manufacturing controls - all three share TO-92 pinout and basic switching/amplifier functionality.

Availability

BC183_J35Z is available at Aetrix Electronics and suitable for audio preamplification, discrete logic interfacing, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.

Supply support for BC183_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 semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The BC183_J35Z belongs to Fairchild's legacy general-purpose transistor family, designed for cost-effective, robust amplification and switching in industrial, automotive, and consumer electronics where reliability and manufacturability were prioritized.

FAQ

What is the maximum collector current rating for BC183_J35Z?

The BC183_J35Z has a maximum continuous DC collector current rating of 100 mA at T_A = 25°C. Derating is required above this ambient temperature per the thermal resistance curve in the official datasheet. Exceeding 100 mA risks thermal runaway or permanent degradation of h_FE and V_CE(sat) in the BC183_J35Z.

Does BC183_J35Z support linear amplification at high frequencies?

Yes, the BC183_J35Z achieves a current-gain bandwidth product (f_T) of 150 MHz under standard test conditions (V_CE = 5 V, I_C = 10 mA), supporting small-signal linear amplification up to approximately 100 MHz. Performance depends on proper biasing, layout parasitics, and load impedance - actual usable bandwidth in a BC183_J35Z circuit may be lower due to stray capacitance and source resistance.

What is the pin configuration of BC183_J35Z?

The BC183_J35Z uses a standard TO-92 package with pin 1 = Collector, pin 2 = Base, pin 3 = Emitter - verified from Fairchild's BC183 Rev. A datasheet and confirmed across multiple authorized distributor footprints. This pinout is consistent with industry-standard NPN transistors like the 2N3904 and BC547, enabling direct substitution in many layouts if electrical parameters align.

Is BC183_J35Z suitable for low-noise audio applications?

Yes, the BC183_J35Z specifies a noise figure of 10 dB at I_C = 200 mA, RG = 2 kΩ, and f = 1 kHz, making it suitable for low-noise preamplifier stages in microphone and sensor interfaces. Optimal noise performance requires careful attention to emitter degeneration, bypassing, and grounding - the BC183_J35Z delivers measurable SNR improvement over higher-noise alternatives in properly designed circuits.

What is the storage temperature range for BC183_J35Z?

The BC183_J35Z has a specified storage and junction temperature range of −55°C to +150°C, per Fairchild's Absolute Maximum Ratings table. This wide range supports deployment in harsh environments such as automotive engine compartments or industrial control cabinets, provided PCB layout and thermal management maintain actual junction temperature within limits during operation of the BC183_J35Z.

BC183_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:: 40 @ 10µA, 5V

Power - Max:: 350 mW

Frequency - Transition:: 150MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC183_J35Z FAQ

1.How can I place an order for BC183_J35Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC183_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 BC183_J35Z reliable?

The price and inventory of BC183_J35Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC183_J35Z is usually 5 days.

3.What payment methods are accepted for BC183_J35Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC183_J35Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC183_J35Z?

BC183_J35Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC183_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 BC183_J35Z?

For technical support, including BC183_J35Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC183_J35Z requirements.

6.How does Aetrix verify that BC183_J35Z is sourced from the original manufacturer or authorized distributors?

All BC183_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 BC183_J35Z meets industry standards.

7.What is the process for return or replacement of BC183_J35Z?

All BC183_J35Z units undergo pre-shipment inspection (PSI). If there is an issue with BC183_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 BC183_J35Z part is unused and in its original packaging.

Return procedure for BC183_J35Z:

1.Submit a request within 90 days.

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

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