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

onsemi PN2222TA

Name: PN2222TA
Brand: onsemi
SKU: PN2222TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PN2222TA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: PN2222TA.pdf

Description:: TRANS NPN 30V 0.6A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PN2222TA from ON Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for medium-power amplification and switching applications, with a 40 V collector-emitter breakdown voltage (V_CEO), 1.0 A maximum collector current (I_C), and DC current gain (h_FE) ranging from 35 to 300 depending on operating conditions. It is commonly used in low-frequency amplifier stages, relay drivers, and digital logic interface circuits.

For engineers reviewing the PN2222TA datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package thermal limits (625 mW at 25°C, derating 5.0 mW/°C), saturation voltage performance (V_CE(sat) = 0.3 V at I_C = 150 mA / I_B = 15 mA), and guaranteed h_FE minimum of 50 at I_C = 1.0 mA.

Technical Context

The PN2222TA operates as a silicon NPN BJT with a maximum junction temperature of 150°C and specified absolute maximum ratings including V_CBO = 75 V, V_EBO = 6.0 V, and T_STG = −55 to +150°C. Its small-signal characteristics include f_T = 300 MHz at I_C = 20 mA and V_CE = 20 V, and C_obo = 8.0 pF at V_CB = 10 V.

Switching behavior is characterized by delay time (t_d) ≤ 10 ns, rise time (t_r) ≤ 25 ns, storage time (t_s) ≤ 225 ns, and fall time (t_f) ≤ 60 ns under defined test conditions (V_CC = 30 V, I_C = 150 mA). Noise figure is 4.0 dB at I_C = 100 μA, V_CE = 10 V, R_S = 1.0 kΩ, f = 1 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown; defines upper rail limit in switching or amplifier designs.
I_C (max)	1.0 A - Continuous DC collector current rating; usable up to 500 mA per typical application guidance.
h_FE (min)	50 at I_C = 1.0 mA - Minimum DC current gain ensures reliable base drive sizing for low-current switching.
V_CE(sat)	0.3 V at I_C = 150 mA / I_B = 15 mA - Low saturation voltage minimizes power loss and heating in saturated switch operation.
P_D	625 mW at 25°C - Total power dissipation limit; requires thermal derating (5.0 mW/°C) above ambient.
f_T	300 MHz - Current-gain bandwidth product; supports amplification and switching up to low-VHF frequencies.

Pinout & Package

PN2222TA is housed in a JEDEC-standard TO-92 3-lead plastic package with straight leads (JEDEC TO-92 compliant configuration). The package provides mechanical robustness and sufficient thermal dissipation for medium-power discrete use cases.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal in NPN configuration	Connected to ground or low-side reference; determines current path direction and bias polarity.
Base (B)	Control input for transistor conduction	Receives forward-biased current to enable collector-emitter conduction; requires current-limiting resistor in most designs.
Collector (C)	Current source terminal in NPN configuration	Connected to load and supply rail; carries amplified or switched output current; must respect V_CEO and P_D limits.

Key Features

Feature	Design Value
Medium-power switching capability	Rated for continuous I_C up to 1.0 A and V_CEO = 40 V, enabling use in relay drivers and power logic interfaces.
Guaranteed h_FE range across operating conditions	h_FE = 35–300 supports consistent gain design from microamp biasing to 150 mA loads without redesign.
Low V_CE(sat) at moderate currents	V_CE(sat) = 0.3 V at I_C/I_B = 150 mA/15 mA reduces conduction loss and improves efficiency in saturated-switch applications.
High f_T and low capacitance	f_T = 300 MHz and C_obo = 8.0 pF allow stable operation in RF amplifier front-ends and fast-switching digital buffers.

Applications

Audio Pre-Amplifier Stage	Microcontroller GPIO Driver
Use Scenario: Amplifying weak line-level audio signals (e.g., from electret microphone or sensor output) prior to ADC sampling. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology for voltage and current gain. Use Value: h_FE ≥ 50 at I_C = 1.0 mA ensures predictable gain with minimal base drive, while low noise figure (4.0 dB) preserves signal integrity.	Use Scenario: Driving LEDs, small relays, or MOSFET gates from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Low-side switch with base driven directly from MCU GPIO pin through current-limiting resistor. Use Value: V_CE(sat) ≤ 0.3 V at I_C = 150 mA keeps power dissipation low (< 45 mW), avoiding thermal stress during sustained on-state operation.
DC Motor Speed Control (Low-Power)	Signal Level Translation
Use Scenario: PWM-controlled speed regulation for small brushed DC motors (e.g., in portable instruments or lab equipment). IC Role / Device Role / Timing Role: Switching element in low-side motor driver configuration, handling peak currents up to 500 mA. Use Value: t_s ≤ 225 ns and t_f ≤ 60 ns support clean PWM edge transitions at frequencies up to ~100 kHz without excessive switching loss.	Use Scenario: Converting 1.8 V or 3.3 V logic levels to 5 V TTL-compatible signals for legacy peripherals. IC Role / Device Role / Timing Role: Active pull-up stage in open-collector or level-shifting interface circuit. Use Value: Guaranteed V_CEO = 40 V and V_CBO = 75 V provide ample margin against voltage transients during bus contention or hot-plug events.

Audio Pre-Amplifier Stage

Microcontroller GPIO Driver

Use Scenario: Amplifying weak line-level audio signals (e.g., from electret microphone or sensor output) prior to ADC sampling.

IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology for voltage and current gain.

Use Value: h_FE ≥ 50 at I_C = 1.0 mA ensures predictable gain with minimal base drive, while low noise figure (4.0 dB) preserves signal integrity.

Use Scenario: Driving LEDs, small relays, or MOSFET gates from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: Low-side switch with base driven directly from MCU GPIO pin through current-limiting resistor.

Use Value: V_CE(sat) ≤ 0.3 V at I_C = 150 mA keeps power dissipation low (< 45 mW), avoiding thermal stress during sustained on-state operation.

DC Motor Speed Control (Low-Power)

Signal Level Translation

Use Scenario: PWM-controlled speed regulation for small brushed DC motors (e.g., in portable instruments or lab equipment).

IC Role / Device Role / Timing Role: Switching element in low-side motor driver configuration, handling peak currents up to 500 mA.

Use Value: t_s ≤ 225 ns and t_f ≤ 60 ns support clean PWM edge transitions at frequencies up to ~100 kHz without excessive switching loss.

Use Scenario: Converting 1.8 V or 3.3 V logic levels to 5 V TTL-compatible signals for legacy peripherals.

IC Role / Device Role / Timing Role: Active pull-up stage in open-collector or level-shifting interface circuit.

Use Value: Guaranteed V_CEO = 40 V and V_CBO = 75 V provide ample margin against voltage transients during bus contention or hot-plug events.

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
MMBT2222ALT1G	Same die, SOT-23 package (smaller footprint, lower thermal mass); P_D = 310 mW (vs. 625 mW); R_θJA = 300°C/W (vs. 200°C/W).	Preferred for space-constrained PCBs where thermal load is light; unsuitable for >200 mA continuous operation without heatsinking.	Select MMBT2222ALT1G when board area is critical and power dissipation remains below 250 mW.
PN2222A (TO-92 bulk)	Identical electrical specs and die; differs only in packaging method (bulk vs. ammo tape); same TO-92 package outline and pinout.	No functional difference; choice depends solely on assembly method (manual vs. auto-placement).	PN2222A (bulk) is functionally identical and interchangeable with PN2222TA for prototyping or hand-soldered builds.

Compared with MMBT2222ALT1G, PN2222TA offers higher power handling and better thermal stability in TO-92; compared with PN2222A (bulk), it provides tape-and-ammo compatibility for automated assembly without electrical trade-offs.

Availability

PN2222TA is available at Aetrix Electronics and suitable for audio pre-amplifier stages, microcontroller GPIO drivers, and low-power DC motor control requiring stable component supply, long-term manufacturability, and JEDEC-compliant TO-92 sourcing.

Supply support for PN2222TA 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power and signal management solutions, with core expertise in analog, discrete, and power IC technologies.

PN2222TA belongs to ON Semiconductor's legacy general-purpose BJT product line-originally developed by Fairchild Semiconductor-designed for cost-sensitive, high-reliability linear and switching applications across consumer, industrial, and computing systems.

FAQ

What is the pin configuration of PN2222TA?

The PN2222TA uses a standard TO-92 package with emitter-base-collector (E-B-C) pinout when viewed with flat side facing outward and leads pointing down. Pin 1 is emitter, pin 2 is base, and pin 3 is collector. This matches JEDEC TO-92 specification ZA03D and is confirmed in Fairchild's official package drawing ZA03D.pdf.

Does PN2222TA support switching at 100 kHz PWM?

Yes, PN2222TA supports 100 kHz PWM operation: its documented switching times (t_d ≤ 10 ns, t_r ≤ 25 ns, t_s ≤ 225 ns, t_f ≤ 60 ns) yield a total switching period well under 10 μs, allowing clean duty-cycle fidelity. However, thermal limits must be observed-continuous I_C > 300 mA at this frequency requires careful PCB copper area design.

What is the minimum h_FE guaranteed for PN2222TA at I_C = 10 mA?

The minimum h_FE guaranteed for PN2222TA at I_C = 10 mA and V_CE = 10 V is 75, as specified in the "Electrical Characteristics" table of the official datasheet (Rev. 1.1.0, page 3). This value is tested and binned during production and applies across the full operating temperature range.

Can PN2222TA replace BC547 in existing designs?

PN2222TA can replace BC547 in many low-to-medium current applications, but caution is required: BC547 has V_CEO = 45 V and h_FE = 110–800, while PN2222TA has V_CEO = 40 V and h_FE = 35–300. For designs operating near 45 V or requiring high gain at low I_C, validation of voltage margin and gain stability is necessary before substitution.

Is PN2222TA RoHS compliant and lead-free?

Yes, PN2222TA is RoHS compliant and lead-free. As an ON Semiconductor product manufactured post-Fairchild integration, it meets J-STD-609 Category 3 marking requirements and carries the "Pb-Free" designation in official packaging documentation and part marking. Full compliance data is available via ON Semiconductor's Quality & Environmental portal.

PN2222TA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 600 mA

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

Vce Saturation (Max) @ Ib, Ic:: 1V @ 50mA, 500mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 10mV

Power - Max:: 625 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

PN2222TA FAQ

1.How can I place an order for PN2222TA through Aetrix?

Please submit a Request for Quotation (RFQ) for PN2222TA 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 PN2222TA reliable?

The price and inventory of PN2222TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PN2222TA is usually 5 days.

3.What payment methods are accepted for PN2222TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PN2222TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PN2222TA?

PN2222TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PN2222TA 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 PN2222TA?

For technical support, including PN2222TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PN2222TA requirements.

6.How does Aetrix verify that PN2222TA is sourced from the original manufacturer or authorized distributors?

All PN2222TA 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 PN2222TA meets industry standards.

7.What is the process for return or replacement of PN2222TA?

All PN2222TA units undergo pre-shipment inspection (PSI). If there is an issue with PN2222TA, 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 PN2222TA part is unused and in its original packaging.

Return procedure for PN2222TA:

1.Submit a request within 90 days.

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

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