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

onsemi BC182

Name: BC182
Brand: onsemi
SKU: BC182
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC182

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC182.pdf

Description:: TRANS NPN 50V 0.1A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC182BRL1G from onsemi is an NPN silicon general-purpose amplifier transistor in TO-92 package, rated for 50 V_CEO, 100 mA_C, and 350 mW dissipation at T_A = 25°C. It delivers h_FE = 120–500 (at I_C = 10 mA), f_T = 150 MHz typical, and V_CE(sat) ≤ 0.25 V at I_C/I_B = 10, suitable for low-power audio preamplification and signal switching in discrete analog stages.

For engineers reviewing the BC182BRL1G datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain spread across variants (BC182 vs. BC182A/B), saturation voltage behavior under defined I_C/I_B ratios, thermal resistance (R_JA = 357°C/W), and Pb-free tape-and-reel packaging compliance.

Technical Context

The BC182BRL1G operates as a medium-speed, low-voltage NPN bipolar junction transistor optimized for linear amplification and switching in ambient-temperature-stable circuits. Its h_FE range (120–500) and f_T = 150 MHz (typ.) support audio-frequency gain stages and low-duty-cycle digital interface buffering.

It features V_(BR)CEO = 50 V, V_(BR)CBO = 60 V, and V_EBO = 6.0 V - enabling use in grounded-emitter configurations with moderate supply rails. C_ob = 5.0 pF and C_ib = 8.0 pF (f = 1 MHz) define its high-frequency input/output capacitance limits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit for common-emitter amplifier designs.
I_C (max)	100 mA - Continuous collector current rating; defines maximum signal swing before thermal derating.
P_D @ T_A	350 mW - Power dissipation at 25°C ambient; requires heatsinking or layout derating above 25°C (2.8 mW/°C).
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 (typ.) - Transition frequency; determines usable bandwidth for small-signal amplification up to ~15 MHz.
V_CE(sat)	≤ 0.25 V @ I_C/I_B = 10 - Saturation voltage defining low-loss switching performance in digital logic interfaces.
R_JA	357°C/W - Junction-to-ambient thermal resistance; indicates need for PCB copper area or airflow in sustained operation.

Pinout & Package

BC182BRL1G uses the TO-92 (Case 29, Style 17) through-hole plastic package with standardized lead spacing and mechanical dimensions per ON Semiconductor's CASE 29-11 specification. The device is marked with "BC182" and date code (AYWW format); Pb-free construction complies with RoHS.

Pin/Terminal	Circuit Role	Design Meaning
1	Collector	Main current output terminal; connects to load or next stage; carries full I_C and dissipates most power.
2	Base	Control electrode; requires precise current drive (I_B ≈ I_C/h_FE) to bias transistor into active or saturated region.
3	Emitter	Current return path; often tied to ground or emitter resistor for bias stabilization and AC feedback.

Key Features

Feature	Design Value
Pb-free TO-92 packaging	Complies with RoHS Directive 2011/65/EU; enables automated soldering without lead contamination risk.
Wide h_FE range (120–500)	Supports production binning and circuit tolerance design; allows gain compensation via emitter degeneration.
Low V_CE(sat) (≤0.25 V)	Minimizes conduction loss in switching applications; reduces heat generation in relay drivers and LED switches.
f_T = 150 MHz (typ.)	Enables stable small-signal amplification up to mid-audio frequencies; supports oscillator and RF detector front-ends.
Low leakage (I_CBO ≤ 15 nA)	Ensures stable bias in high-impedance amplifier inputs and low-power standby circuits over temperature.

Applications

Audio Preamplifier Stage	Low-Speed Digital Interface Buffer
Use Scenario: Amplifying microphone-level signals (1–10 mV) to line-level (0.3–1 V) in portable audio recorders. IC Role / Device Role / Timing Role: NPN common-emitter voltage amplifier with emitter-degeneration bias network. Use Value: h_FE ≥ 120 ensures sufficient gain per stage; f_T > 100 MHz avoids roll-off below 20 kHz; low NF = 2.0 dB (typ.) preserves SNR.	Use Scenario: Level-shifting TTL outputs (0/5 V) to drive CMOS logic inputs requiring 0/3.3 V thresholds. IC Role / Device Role / Timing Role: Single-transistor open-collector switch with base current limiting resistor. Use Value: V_CE(sat) ≤ 0.25 V guarantees logic-low < 0.4 V; I_C = 100 mA supports fan-out of ≥10 standard loads.
Relay Driver Circuit	Temperature-Stable Bias Reference
Use Scenario: Switching 12 V, 50 mA electromagnetic relays in industrial control panels with microcontroller GPIO. IC Role / Device Role / Timing Role: Saturated-switch NPN transistor with flyback diode protection. Use Value: V_(BR)CEO = 50 V provides 4× safety margin over 12 V rail; R_JA = 357°C/W allows operation at 50°C ambient without heatsink.	Use Scenario: Building a precision current source for RTD or thermistor biasing in sensor signal conditioning modules. IC Role / Device Role / Timing Role: Constant-current sink using emitter-follower configuration with stabilized base voltage. Use Value: Low I_CBO ≤ 15 nA minimizes temperature-induced current drift; h_FE consistency enables predictable current mirror matching.

Audio Preamplifier Stage

Low-Speed Digital Interface Buffer

Use Scenario: Amplifying microphone-level signals (1–10 mV) to line-level (0.3–1 V) in portable audio recorders.

IC Role / Device Role / Timing Role: NPN common-emitter voltage amplifier with emitter-degeneration bias network.

Use Value: h_FE ≥ 120 ensures sufficient gain per stage; f_T > 100 MHz avoids roll-off below 20 kHz; low NF = 2.0 dB (typ.) preserves SNR.

Use Scenario: Level-shifting TTL outputs (0/5 V) to drive CMOS logic inputs requiring 0/3.3 V thresholds.

IC Role / Device Role / Timing Role: Single-transistor open-collector switch with base current limiting resistor.

Use Value: V_CE(sat) ≤ 0.25 V guarantees logic-low < 0.4 V; I_C = 100 mA supports fan-out of ≥10 standard loads.

Relay Driver Circuit

Temperature-Stable Bias Reference

Use Scenario: Switching 12 V, 50 mA electromagnetic relays in industrial control panels with microcontroller GPIO.

IC Role / Device Role / Timing Role: Saturated-switch NPN transistor with flyback diode protection.

Use Value: V_(BR)CEO = 50 V provides 4× safety margin over 12 V rail; R_JA = 357°C/W allows operation at 50°C ambient without heatsink.

Use Scenario: Building a precision current source for RTD or thermistor biasing in sensor signal conditioning modules.

IC Role / Device Role / Timing Role: Constant-current sink using emitter-follower configuration with stabilized base voltage.

Use Value: Low I_CBO ≤ 15 nA minimizes temperature-induced current drift; h_FE consistency enables predictable current mirror matching.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN amplifier transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC547B	Higher h_FE (200–450), same V_CEO = 45 V, lower P_D = 500 mW, TO-92 package.	Slightly lower max voltage margin; better suited for higher-gain, lower-power gain blocks.	Select BC547B when tighter h_FE tolerance and lower noise (NF = 10 dB max) are prioritized over absolute V_CEO headroom.
2N3904	Same V_CEO = 40 V, lower I_C = 200 mA, higher f_T = 300 MHz, TO-92 package.	Higher speed but reduced voltage margin; preferred in fast-switching or wideband applications.	Choose 2N3904 where bandwidth > 50 MHz is required and supply rails remain ≤ 30 V.

Compared with BC182BRL1G, BC547B offers improved h_FE consistency for bias-critical analog stages, while 2N3904 delivers superior high-frequency response at the cost of reduced breakdown margin - both require verification of thermal layout due to identical R_JA (~350°C/W) and TO-92 footprint.

Availability

BC182BRL1G is available at Aetrix Electronics and suitable for audio preamplifiers, relay drivers, low-speed digital buffers, and temperature-stable current sources requiring stable component supply across long-lifecycle industrial and consumer programs.

Supply support for BC182BRL1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BC182 series belongs to onsemi's legacy general-purpose bipolar transistor product line, designed for cost-sensitive, reliability-critical linear and switching functions in discrete analog signal chains and interface circuits.

FAQ

What is the maximum collector-emitter voltage rating for BC182BRL1G?

The BC182BRL1G has a maximum collector-emitter voltage rating (V_(BR)CEO) of 50 Vdc, tested at I_C = 2.0 mA with base open. This rating defines the absolute upper limit for voltage applied between collector and emitter before breakdown occurs. Exceeding this value risks permanent device damage, and design margins should maintain at least 20% derating in continuous operation.

Is BC182BRL1G compatible with lead-free reflow soldering processes?

Yes, BC182BRL1G is a Pb-free device manufactured in accordance with RoHS Directive 2011/65/EU. Its TO-92 package supports standard lead-free reflow profiles (peak temperature ≤ 260°C, time above liquidus ≤ 60 seconds). The device marking includes "G" suffix and conforms to onsemi's Pb-free soldering guidelines documented in SOLDERRM/D reference manual.

How does the h_FE variation affect circuit design using BC182BRL1G?

The BC182BRL1G exhibits h_FE ranging from 120 to 500 at I_C = 10 mA and V_CE = 5 V. This wide spread necessitates emitter degeneration resistors or feedback networks to stabilize DC bias points. Designs relying on fixed base current must accommodate worst-case h_FE extremes to avoid cutoff or saturation under temperature and process variation.

What is the thermal resistance junction-to-ambient (R_JA) for BC182BRL1G?

The BC182BRL1G has a specified R_JA of 357°C/W under standard JEDEC test conditions (single device on FR-4 board, 1-inch² copper pad). In practice, actual R_JA depends heavily on PCB copper area, airflow, and nearby heat sources. For continuous 350 mW operation, ambient temperature must stay below 55°C unless additional copper or forced cooling is implemented.

Can BC182BRL1G be used as a direct replacement for BC182 or BC182B in existing designs?

BC182BRL1G is functionally identical to BC182B in electrical and thermal specifications, differing only in packaging (tape-and-reel vs. bulk) and Pb-free compliance. It shares the same TO-92 footprint, pinout, and maximum ratings. No schematic or layout changes are needed when substituting BC182BRL1G for BC182B; however, reflow profile validation is recommended for new assembly lines.

BC182 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)

BC182 FAQ

1.How can I place an order for BC182 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC182 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 BC182 reliable?

The price and inventory of BC182 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC182 is usually 5 days.

3.What payment methods are accepted for BC182?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC182 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC182?

BC182 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC182 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 BC182?

For technical support, including BC182 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC182 requirements.

6.How does Aetrix verify that BC182 is sourced from the original manufacturer or authorized distributors?

All BC182 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 BC182 meets industry standards.

7.What is the process for return or replacement of BC182?

All BC182 units undergo pre-shipment inspection (PSI). If there is an issue with BC182, 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 BC182 part is unused and in its original packaging.

Return procedure for BC182:

1.Submit a request within 90 days.

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

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