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

onsemi BC182L_D75Z

Name: BC182L_D75Z
Brand: onsemi
SKU: BC182L_D75Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC182L_D75Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC182L_D75Z.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC182L_D75Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for low-power amplification and switching at collector currents up to 100 mA. It features V_CEO = 50 V, h_FE = 40–500 (at I_C = 10 µA to 100 mA), f_T = 150 MHz, and TO-92 package - commonly used in audio preamplifiers, signal buffering, and discrete logic interface circuits.

For engineers reviewing the BC182L_D75Z datasheet, pinout, applications, or equivalent options, key selection considerations include its DC current gain spread, thermal dissipation limit of 350 mW at 25°C, saturation voltage behavior under defined I_B/I_C conditions, and suitability for linear amplification versus saturated switching roles.

Technical Context

The BC182L_D75Z operates as a silicon NPN BJT with epitaxial planar construction, optimized for general-purpose analog amplification rather than high-speed switching. Its h_FE varies significantly with collector current - ranging from min. 40 at I_C = 10 µA to min. 80 at I_C = 100 mA - requiring bias network design that accommodates this nonlinearity.

Thermal performance is constrained by R_θJA = 357°C/W and P_D = 350 mW at T_A = 25°C, with derating of 2.8 mW/°C above ambient. Output capacitance C_ob = 5 pF at V_CE = 10 V supports moderate-frequency small-signal operation but limits RF use beyond ~100 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - maximum allowable collector-emitter voltage before breakdown; defines safe operating voltage headroom in amplifier stages.
I_C (continuous)	100 mA - absolute max DC collector current; usable range for linear amplification typically ≤50 mA to maintain linearity and thermal safety.
h_FE	40–500 - wide DC current gain range across I_C; requires emitter degeneration or feedback for stable biasing in amplifier designs.
f_T	150 MHz - unity-gain frequency at V_CE = 5 V, I_C = 10 mA; indicates usable bandwidth for small-signal amplification up to ~10–20 MHz.
P_D @ T_A = 25°C	350 mW - total power dissipation limit; restricts simultaneous high-voltage/high-current operation without heatsinking or derating.
C_ob	5 pF - output capacitance at V_CE = 10 V; contributes to high-frequency roll-off and affects stability in capacitive-loaded stages.

Pinout & Package

BC182L_D75Z is housed in a standard through-hole TO-92 package (3-lead, epoxy-molded, vertical mounting). Lead identification: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - confirmed per Fairchild Rev. A datasheet mechanical drawing.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path for majority carriers	Common reference node in common-emitter/common-base configurations; connects to ground or emitter resistor for bias stabilization.
2 (Collector)	Current entry path for majority carriers	Output node in amplification; connects to supply rail via load resistor or active load; voltage swing limited by V_CEO.
3 (Base)	Control terminal for minority carrier injection	Input node for current-driven control; requires current-limiting resistor when driven from voltage source to avoid overdrive.

Key Features

Feature	Design Value
High f_T (150 MHz)	Enables stable small-signal amplification up to VHF band edges; suitable for IF amplifiers and oscillator buffer stages.
Wide h_FE range (40–500)	Supports flexible bias design - low-I_C high-gain stages or high-I_C medium-gain drivers - but necessitates production binning awareness.
Low V_CE(sat) (0.25 V @ 10 mA)	Reduces conduction loss in switching applications; enables efficient low-voltage saturation in TTL-compatible digital interfaces.
TO-92 mechanical standardization	Ensures compatibility with legacy PCB footprints, wave-soldering processes, and hand-soldering workflows in prototyping and low-volume production.

Applications

Audio Preamp Stage	Discrete Logic Level Shifter
Use Scenario: Amplifying weak microphone or piezo sensor signals in battery-powered portable audio devices. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology to provide voltage gain with minimal component count. Use Value: Low noise figure (NF = 10 dB @ 0.2 mA, 2 kΩ source) and adequate f_T ensure clean mid-band amplification without added op-amps.	Use Scenario: Translating 3.3 V logic outputs to drive 5 V TTL inputs in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: Saturated switch providing current gain to interface between voltage domains while maintaining fast edge integrity. Use Value: V_CE(sat) ≤ 0.6 V at I_C = 100 mA ensures low dropout and reliable logic '0' assertion on 5 V bus.
Low-Frequency Oscillator Core	LED Driver (Constant-Current)
Use Scenario: Serving as active device in phase-shift or Wien bridge oscillator circuits generating 1–10 kHz test tones. IC Role / Device Role / Timing Role: Linear-mode amplifier sustaining oscillation via controlled loop gain; biased in Class-A for low distortion. Use Value: Predictable h_FE variation and stable V_BE(on) (0.55–0.7 V) enable repeatable bias point setting across temperature.	Use Scenario: Driving indicator LEDs in industrial control panels where precise brightness control and thermal robustness are required. IC Role / Device Role / Timing Role: Current-regulating pass element in emitter-follower configuration with sense resistor feedback. Use Value: Max I_C = 100 mA and P_D = 350 mW allow direct drive of multiple LEDs without external heat sinking at ambient ≤50°C.

Audio Preamp Stage

Discrete Logic Level Shifter

Use Scenario: Amplifying weak microphone or piezo sensor signals in battery-powered portable audio devices.

IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology to provide voltage gain with minimal component count.

Use Value: Low noise figure (NF = 10 dB @ 0.2 mA, 2 kΩ source) and adequate f_T ensure clean mid-band amplification without added op-amps.

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

IC Role / Device Role / Timing Role: Saturated switch providing current gain to interface between voltage domains while maintaining fast edge integrity.

Use Value: V_CE(sat) ≤ 0.6 V at I_C = 100 mA ensures low dropout and reliable logic '0' assertion on 5 V bus.

Low-Frequency Oscillator Core

LED Driver (Constant-Current)

Use Scenario: Serving as active device in phase-shift or Wien bridge oscillator circuits generating 1–10 kHz test tones.

IC Role / Device Role / Timing Role: Linear-mode amplifier sustaining oscillation via controlled loop gain; biased in Class-A for low distortion.

Use Value: Predictable h_FE variation and stable V_BE(on) (0.55–0.7 V) enable repeatable bias point setting across temperature.

Use Scenario: Driving indicator LEDs in industrial control panels where precise brightness control and thermal robustness are required.

IC Role / Device Role / Timing Role: Current-regulating pass element in emitter-follower configuration with sense resistor feedback.

Use Value: Max I_C = 100 mA and P_D = 350 mW allow direct drive of multiple LEDs without external heat sinking at ambient ≤50°C.

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 min. (200 vs. 40), lower V_CEO (45 V), same TO-92 package and pinout.	Better suited for low-noise, low-current amplification; less tolerant of voltage transients.	Select BC547B when higher gain consistency at I_C < 10 mA is critical and supply rails remain ≤40 V.
2N2222A	Higher P_D (500 mW), higher I_C (800 mA), same V_CEO (50 V), TO-92 compatible but different pinout (E-B-C vs. E-C-B).	Supports higher power switching and driver applications; requires PCB layout revision due to pin order mismatch.	Choose 2N2222A only if thermal margin or peak current capability is prioritized and board redesign is acceptable.

Compared with BC547B and 2N2222A, BC182L_D75Z offers broader h_FE tolerance and proven stability in legacy audio and oscillator designs, making it preferable where gain variability is managed by circuit topology rather than part selection - especially in cost-sensitive, low-volume, or repair contexts.

Availability

BC182L_D75Z is available at Aetrix Electronics and suitable for audio preamplification, discrete logic interfacing, and low-frequency oscillator circuits requiring stable component supply and long-term obsolescence resilience.

Supply support for BC182L_D75Z 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 BC182L_D75Z belongs to Fairchild's legacy general-purpose BJT product line, engineered for reliability and manufacturability in consumer, industrial, and educational electronics where cost, simplicity, and proven performance outweigh cutting-edge specs.

FAQ

What is the pin configuration of BC182L_D75Z?

The BC182L_D75Z uses a TO-92 package with standardized lead assignment: Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base - verified in Fairchild's Rev. A datasheet mechanical diagram. This E-C-B order differs from 2N2222A (E-B-C), so direct substitution requires pinout verification.

Does BC182L_D75Z support switching applications?

Yes, BC182L_D75Z supports switching applications with V_CE(sat) = 0.25 V at I_C = 10 mA / I_B = 0.5 mA and 0.6 V at I_C = 100 mA / I_B = 5 mA. Its 100 mA I_C rating and low saturation voltage make it suitable for low-power digital interfacing and LED driving, provided thermal limits are observed.

What is the typical noise performance of BC182L_D75Z?

The BC182L_D75Z has a specified noise figure of 10 dB at V_CE = 5 V, I_C = 0.2 mA, R_S = 2 kΩ, f = 1 kHz, and BW = 200 Hz. This makes it appropriate for low-level audio and sensor signal amplification where moderate noise floor is acceptable and op-amp alternatives are undesirable.

Is BC182L_D75Z RoHS compliant?

BC182L_D75Z was manufactured prior to RoHS enforcement deadlines and predates formal compliance documentation. As a legacy Fairchild part released in 2002, it is not certified RoHS-compliant; however, Aetrix Electronics provides full material declaration and traceability data upon request for regulatory review.

How does h_FE vary with operating conditions for BC182L_D75Z?

h_FE for BC182L_D75Z ranges from min. 40 at I_C = 10 µA to min. 80 at I_C = 100 mA (V_CE = 5 V), with typical values reaching 500 at I_C = 2 mA. This strong current dependence means bias networks must be designed with emitter degeneration or feedback to stabilize gain across process and temperature variations in BC182L_D75Z circuits.

BC182L_D75Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

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:: 120 @ 2mA, 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

BC182L_D75Z FAQ

1.How can I place an order for BC182L_D75Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC182L_D75Z 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 BC182L_D75Z reliable?

The price and inventory of BC182L_D75Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC182L_D75Z is usually 5 days.

3.What payment methods are accepted for BC182L_D75Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC182L_D75Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC182L_D75Z?

BC182L_D75Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC182L_D75Z 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 BC182L_D75Z?

For technical support, including BC182L_D75Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC182L_D75Z requirements.

6.How does Aetrix verify that BC182L_D75Z is sourced from the original manufacturer or authorized distributors?

All BC182L_D75Z 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 BC182L_D75Z meets industry standards.

7.What is the process for return or replacement of BC182L_D75Z?

All BC182L_D75Z units undergo pre-shipment inspection (PSI). If there is an issue with BC182L_D75Z, 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 BC182L_D75Z part is unused and in its original packaging.

Return procedure for BC182L_D75Z:

1.Submit a request within 90 days.

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

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