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

onsemi BC182AG

Name: BC182AG
Brand: onsemi
SKU: BC182AG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC182AG

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body

Datasheet:: BC182AG.pdf

Description:: TRANS NPN 50V 0.1A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC182AG from onsemi is an NPN silicon small-signal amplifier transistor in TO-92 package, rated for V_CEO = 50 V, I_C = 100 mA, P_D = 350 mW at T_A = 25°C, with h_FE = 120–500 (at I_C = 10 mA, V_CE = 5 V), and f_T = 150 MHz - used in low-noise audio preamplifier stages and signal conditioning circuits.

For engineers reviewing the BC182AG datasheet, pinout, applications, or equivalent options, key selection considerations include DC current gain spread across variants, saturation voltage at defined I_C/I_B ratios, thermal resistance (R_JA = 357°C/W), Pb-free compliance, and TO-92 mechanical compatibility in discrete analog designs.

Technical Context

The BC182AG operates as a general-purpose NPN bipolar junction transistor optimized for linear amplification, not switching. Its h_FE range (120–500) and low noise figure (NF = 2.0 dB typical at I_C = 0.2 mA) support high-fidelity analog signal paths. The device exhibits f_T = 150 MHz under small-signal conditions (I_C = 0.5 mA, V_CE = 3 V), enabling stable gain up to mid-VHF frequencies.

Thermal design relies on R_JA = 357°C/W (free-air) and R_JC = 125°C/W, requiring careful PCB copper area allocation for power dissipation up to 350 mW. V_BE(on) = 0.62 V typical at I_C = 100 mA confirms base drive compatibility with standard TTL/CMOS logic levels in bias networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; sets safe operating range in common-emitter amplifier rails.
I_C (max)	100 mA - Continuous collector current limit; defines upper bound for linear operation without thermal runaway.
P_D @ T_A=25°C	350 mW - Power dissipation limit in free air; requires derating by 2.8 mW/°C above ambient.
h_FE	120–500 - DC current gain range at I_C = 10 mA, V_CE = 5 V; impacts bias stability and stage gain predictability.
f_T	150 MHz - Transition frequency; determines usable bandwidth for small-signal amplification with unity-gain margin.
NF	2.0 dB typical - Noise figure at I_C = 0.2 mA, R_S = 2 kΩ; critical for low-level signal amplification in microphone or sensor front-ends.
V_CE(sat)	0.25 V max at I_C = 100 mA, I_B = 5 mA - Saturation voltage defining minimum output swing headroom in active-load configurations.

Pinout & Package

BC182AG uses the industry-standard TO-92 (Case 29, Style 17) plastic package with 3 leads, Pb-free plating, and 5000 units per box. Thermal resistance is R_JA = 357°C/W (free-air) and R_JC = 125°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1	Collector	Main current sink terminal; connects to load resistor or next stage input; carries full emitter current minus base current.
2	Base	Control electrode; requires precise bias current (typically ~I_C/h_FE) to set operating point in active region.
3	Emitter	Current source terminal; often tied to ground or emitter degeneration resistor to stabilize DC bias and AC gain.

Key Features

Feature	Design Value
Pb-free TO-92 package	Complies with RoHS Directive 2011/65/EU; eliminates lead contamination risk during reflow and end-of-life disposal.
Low noise figure	2.0 dB typical at 1 kHz enables use in sensitive analog front-ends where signal-to-noise ratio is critical.
Wide h_FE range	120–500 supports flexible bias design but requires production screening or emitter degeneration for gain consistency.
High f_T	150 MHz allows stable small-signal amplification up to ~15–20 MHz with adequate phase margin in multi-stage designs.
Low V_CE(sat)	0.25 V max ensures minimal voltage drop in emitter-follower or Class-A output stages, preserving output swing.

Applications

Audio Preamp Stage	Signal Conditioning Amplifier
Use Scenario: Amplifying weak microphone or piezoelectric sensor outputs in battery-powered voice recorders. IC Role / Device Role / Timing Role: NPN small-signal amplifier configured in common-emitter topology with emitter degeneration. Use Value: 2.0 dB noise figure and 150 MHz f_T preserve signal integrity while supporting wide audio bandwidth (20 Hz–20 kHz) with low distortion.	Use Scenario: Boosting low-level thermocouple or strain gauge signals prior to ADC sampling in industrial data loggers. IC Role / Device Role / Timing Role: Linear transconductance amplifier in precision DC-coupled gain stage with temperature-stable bias network. Use Value: V_CEO = 50 V and h_FE = 120–500 enable robust DC gain control and rejection of supply ripple in noisy environments.
RF Driver Stage	Discrete Oscillator Core
Use Scenario: Driving low-power VHF antenna matching networks in ISM-band (315/433 MHz) remote controls. IC Role / Device Role / Timing Role: Class-A RF amplifier biased for linearity, operating below f_T/10 to maintain gain flatness. Use Value: f_T = 150 MHz and C_ob = 5.0 pF allow stable 30–50 MHz operation with predictable impedance matching and minimal parasitic resonance.	Use Scenario: Active element in Colpitts or Hartley oscillator circuits generating local clock signals for microcontroller peripherals. IC Role / Device Role / Timing Role: Gain block sustaining oscillation via positive feedback through LC tank; requires reliable h_FE and low C_ib/C_ob. Use Value: C_ib = 8.0 pF and C_ob = 5.0 pF minimize frequency pulling, while h_FE ≥ 120 ensures sufficient loop gain for reliable startup at 1–10 MHz.

Audio Preamp Stage

Signal Conditioning Amplifier

Use Scenario: Amplifying weak microphone or piezoelectric sensor outputs in battery-powered voice recorders.

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

Use Value: 2.0 dB noise figure and 150 MHz f_T preserve signal integrity while supporting wide audio bandwidth (20 Hz–20 kHz) with low distortion.

Use Scenario: Boosting low-level thermocouple or strain gauge signals prior to ADC sampling in industrial data loggers.

IC Role / Device Role / Timing Role: Linear transconductance amplifier in precision DC-coupled gain stage with temperature-stable bias network.

Use Value: V_CEO = 50 V and h_FE = 120–500 enable robust DC gain control and rejection of supply ripple in noisy environments.

RF Driver Stage

Discrete Oscillator Core

Use Scenario: Driving low-power VHF antenna matching networks in ISM-band (315/433 MHz) remote controls.

IC Role / Device Role / Timing Role: Class-A RF amplifier biased for linearity, operating below f_T/10 to maintain gain flatness.

Use Value: f_T = 150 MHz and C_ob = 5.0 pF allow stable 30–50 MHz operation with predictable impedance matching and minimal parasitic resonance.

Use Scenario: Active element in Colpitts or Hartley oscillator circuits generating local clock signals for microcontroller peripherals.

IC Role / Device Role / Timing Role: Gain block sustaining oscillation via positive feedback through LC tank; requires reliable h_FE and low C_ib/C_ob.

Use Value: C_ib = 8.0 pF and C_ob = 5.0 pF minimize frequency pulling, while h_FE ≥ 120 ensures sufficient loop gain for reliable startup at 1–10 MHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC547C	Higher h_FE (420–800), same TO-92, V_CEO = 45 V, f_T = 300 MHz	Better high-frequency gain but lower breakdown margin; less suitable for 50 V rail designs.	Select BC547C when higher gain and bandwidth are prioritized over voltage headroom.
2N3904	Lower I_C (200 mA), V_CEO = 40 V, h_FE = 100–300, f_T = 300 MHz, same TO-92	Widely available but reduced voltage rating limits use in 48 V telecom interfaces.	Choose 2N3904 for cost-sensitive, high-volume consumer electronics where 40 V suffices.

Compared with BC182AG, BC547C offers higher gain-bandwidth but sacrifices 5 V of collector-emitter breakdown margin, while 2N3904 trades voltage rating for broader global availability and tighter h_FE distribution - all three remain non-pin-compatible alternatives requiring layout verification.

Availability

BC182AG is available at Aetrix Electronics and suitable for audio preamplifiers, sensor signal conditioners, RF driver stages, and discrete oscillator circuits requiring stable component supply and Pb-free compliance.

Supply support for BC182AG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering power management, analog, sensing, and connectivity solutions.

The BC182AG belongs to onsemi's legacy general-purpose bipolar transistor family, designed for cost-effective, reliable linear amplification in industrial, consumer, and communication equipment where performance consistency and thermal robustness are essential.

FAQ

What is the maximum collector-emitter voltage rating for BC182AG?

The BC182AG has a maximum collector-emitter voltage (V_CEO) rating of 50 VDC. This value is measured with I_C = 2.0 mA and I_B = 0, and represents the absolute maximum voltage that can be applied between collector and emitter before breakdown occurs. Exceeding this rating risks permanent device damage, and design margins should be maintained per onsemi's recommended derating guidelines.

Is BC182AG RoHS-compliant and what does the 'G' suffix indicate?

Yes, BC182AG is RoHS-compliant. The 'G' suffix explicitly denotes a Pb-free (lead-free) version packaged in TO-92, conforming to Directive 2011/65/EU. This is confirmed in the ordering information table and thermal characteristics section of the official BC182/D datasheet, where BC182G and BC182AG are listed alongside packaging and shipping details for Pb-free variants.

What is the typical noise figure of BC182AG and under what conditions is it specified?

The typical noise figure (NF) of BC182AG is 2.0 dB, measured at I_C = 0.2 mA, V_CE = 5.0 V, R_S = 2.0 kΩ, and f = 1.0 kHz. This low-noise performance makes BC182AG suitable for amplifying weak signals in microphone preamps and sensor interfaces where signal-to-noise ratio directly impacts system resolution.

How does the DC current gain (h_FE) of BC182AG compare to BC182A and BC182B variants?

BC182AG shares the same h_FE specification as BC182A: minimum 120, maximum 500 at I_C = 10 mA and V_CE = 5 V. In contrast, BC182B specifies h_FE = 180–500 under identical conditions. All variants use identical TO-92 packaging and share identical absolute maximum ratings - only the h_FE binning differs per part number.

What is the thermal resistance from junction to ambient (R_JA) for BC182AG in free-air conditions?

The thermal resistance from junction to ambient (R_JA) for BC182AG is 357°C/W under free-air conditions at T_A = 25°C. This value assumes no heatsinking or PCB copper thermal relief, and must be derated by 2.8 mW/°C above 25°C ambient to maintain safe junction temperature - critical for sustained 350 mW operation in enclosed enclosures.

BC182AG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body

Packaging:: Bulk

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:: 200MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

BC182AG FAQ

1.How can I place an order for BC182AG through Aetrix?

Please submit a Request for Quotation (RFQ) for BC182AG 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 BC182AG reliable?

The price and inventory of BC182AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC182AG is usually 5 days.

3.What payment methods are accepted for BC182AG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC182AG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC182AG?

BC182AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC182AG 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 BC182AG?

For technical support, including BC182AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC182AG requirements.

6.How does Aetrix verify that BC182AG is sourced from the original manufacturer or authorized distributors?

All BC182AG 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 BC182AG meets industry standards.

7.What is the process for return or replacement of BC182AG?

All BC182AG units undergo pre-shipment inspection (PSI). If there is an issue with BC182AG, 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 BC182AG part is unused and in its original packaging.

Return procedure for BC182AG:

1.Submit a request within 90 days.

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

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