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

onsemi P2N2222AZL1

Name: P2N2222AZL1
Brand: onsemi
SKU: P2N2222AZL1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P2N2222AZL1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: P2N2222AZL1.pdf

Description:: TRANS NPN 40V 0.6A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

P2N2222AZL1 from ON Semiconductor is an NPN silicon general-purpose amplifier transistor in TO-92 package, rated for 40 V_CEO, 600 mA_C, and 625 mW at T_A = 25°C, widely used in low-power switching and linear amplification circuits such as signal buffering and relay drivers.

For engineers reviewing the P2N2222AZL1 datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain (h_FE = 35–300), V_CE(sat) ≤ 1.0 V at I_C = 500 mA, f_T = 300 MHz, thermal resistance R_JA = 200 °C/W, and TO-92 mechanical compatibility with legacy 2N2222A designs.

Technical Context

The P2N2222AZL1 operates as a discrete bipolar junction transistor optimized for medium-speed switching (t_d ≤ 10 ns, t_s ≤ 225 ns) and small-signal amplification (h_fe = 50–375 at 1–10 mA). Its base-emitter saturation voltage ranges from 0.6 V to 2.0 V depending on drive level, supporting robust turn-on under varied bias conditions.

Designed for ambient operation from −55°C to +150°C, it features low leakage (I_CEO ≤ 10 nA, I_CBO ≤ 0.01 A at 150°C) and stable gain across temperature, with C_ibo = 25 pF and C_obo = 8.0 pF enabling predictable high-frequency behavior up to 300 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C (cont.)	600 mA - Continuous collector current limit defining maximum load-handling capability
P_D @ T_A	625 mW - Power dissipation limit at 25°C ambient, derating 5.0 mW/°C above that temperature
h_FE (min)	35 - Minimum DC current gain at I_C = 0.1 mA, ensuring reliable base drive margin in switching applications
f_T	300 MHz - Frequency at which small-signal current gain drops to unity, indicating usable bandwidth for RF or fast digital signals
R_JA	200 °C/W - Thermal resistance from junction to ambient, determining required heatsinking for sustained operation
V_CE(sat)	≤ 1.0 V - Collector-emitter saturation voltage at I_C = 500 mA / I_B = 50 mA, directly impacting conduction loss in switch mode

Pinout & Package

Package: TO-92 (Case 29-11, Style 17), through-hole, 3-lead plastic package with standard lead spacing and mechanical dimensions compliant with ANSI Y14.5M-1982.

Pin/Terminal	Circuit Role	Design Meaning
1	Collector	Main current output terminal; connects to load or supply rail in common-emitter configurations
2	Base	Control input; requires ~0.7 V forward bias and sufficient current (e.g., 15–50 mA) to saturate the transistor
3	Emitter	Current return path; typically grounded or connected to low-side reference in switching topologies

Key Features

Feature	Design Value
Pb-Free construction	Complies with RoHS Directive 2011/65/EU; marked with "G" suffix variant (P2N2222AZL1G), suitable for lead-free reflow assembly
Wide operating temperature range	−55°C to +150°C junction temperature enables use in automotive under-hood, industrial controls, and outdoor equipment
Low noise figure	NF ≤ 4.0 dB at I_C = 100 µA, supporting low-noise preamplifier stages in sensor interfaces and audio front-ends
Fast switching performance	Storage time t_s ≤ 225 ns ensures rapid turn-off in pulse-width modulation and digital logic interfacing
High f_T / low capacitance	300 MHz f_T with C_obo = 8.0 pF and C_ibo = 25 pF supports stable RF amplification up to VHF band

Applications

Relay Driver Circuit	Low-Voltage Signal Amplifier
Use Scenario: Driving 5–12 V DC relays in PLC I/O modules and home automation controllers where microcontroller GPIOs lack sufficient current. IC Role / Device Role / Timing Role: Discrete NPN switch providing current gain to interface low-power logic with inductive loads. Use Value: V_CE(sat) ≤ 0.3 V at I_C = 150 mA minimizes power loss and coil heating; h_FE ≥ 75 ensures reliable saturation with 1–2 mA base drive.	Use Scenario: Amplifying weak analog signals from thermistors, photodiodes, or microphone elements in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Single-stage common-emitter amplifier configured for voltage gain and impedance matching. Use Value: f_T = 300 MHz and h_fe = 300 at 10 mA support stable mid-band gain up to 100 kHz without oscillation or phase shift.
LED Current Regulator	Logic-Level Translator
Use Scenario: Constant-current LED driver in status indicator panels and automotive dashboard lighting where precise brightness control is required. IC Role / Device Role / Timing Role: Linear-mode current source using emitter resistor feedback to stabilize LED current against supply and temperature variation. Use Value: Tight h_FE spread (35–300) and low V_BE(sat) drift enable ±5% current regulation over −40°C to +85°C ambient.	Use Scenario: Translating 3.3 V logic outputs to 5 V TTL-compatible inputs in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Active pull-up level shifter operating in common-collector (emitter-follower) configuration. Use Value: Low V_BE(on) (~0.7 V) and high h_FE ensure full 5 V swing with <10 ns propagation delay, preserving signal integrity in 10 MHz clock domains.

Relay Driver Circuit

Low-Voltage Signal Amplifier

Use Scenario: Driving 5–12 V DC relays in PLC I/O modules and home automation controllers where microcontroller GPIOs lack sufficient current.

IC Role / Device Role / Timing Role: Discrete NPN switch providing current gain to interface low-power logic with inductive loads.

Use Value: V_CE(sat) ≤ 0.3 V at I_C = 150 mA minimizes power loss and coil heating; h_FE ≥ 75 ensures reliable saturation with 1–2 mA base drive.

Use Scenario: Amplifying weak analog signals from thermistors, photodiodes, or microphone elements in battery-powered IoT sensors.

IC Role / Device Role / Timing Role: Single-stage common-emitter amplifier configured for voltage gain and impedance matching.

Use Value: f_T = 300 MHz and h_fe = 300 at 10 mA support stable mid-band gain up to 100 kHz without oscillation or phase shift.

LED Current Regulator

Logic-Level Translator

Use Scenario: Constant-current LED driver in status indicator panels and automotive dashboard lighting where precise brightness control is required.

IC Role / Device Role / Timing Role: Linear-mode current source using emitter resistor feedback to stabilize LED current against supply and temperature variation.

Use Value: Tight h_FE spread (35–300) and low V_BE(sat) drift enable ±5% current regulation over −40°C to +85°C ambient.

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

IC Role / Device Role / Timing Role: Active pull-up level shifter operating in common-collector (emitter-follower) configuration.

Use Value: Low V_BE(on) (~0.7 V) and high h_FE ensure full 5 V swing with <10 ns propagation delay, preserving signal integrity in 10 MHz clock domains.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PN2222A	Same electrical specs and TO-92 package; differs only in manufacturer marking and traceability documentation	No functional difference; fully interchangeable in all published schematics referencing 2222A family	Preferred for cost-sensitive consumer electronics where ON Semi's extended lifecycle support is not required
MPS2222A	Slightly higher V_CEO (60 V vs. 40 V); otherwise identical h_FE, f_T, and switching times	Better suited for 24 V industrial bus interfaces where transient overvoltage margin is critical	Select when system-level surge testing exceeds 40 V or when long-term availability of ON Semi variants is uncertain

Compared with PN2222A and MPS2222A, the P2N2222AZL1 offers ON Semiconductor's documented Pb-free compliance, tighter production lot traceability, and guaranteed availability through authorized distribution channels-critical for medical and industrial OEM programs requiring full material declarations.

Availability

P2N2222AZL1 is available at Aetrix Electronics and suitable for relay drivers, LED current regulators, low-voltage signal amplifiers, and logic-level translators requiring stable component supply across multi-year production cycles.

Supply support for P2N2222AZL1 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 supplier delivering energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.

The P2N2222AZL1 belongs to ON Semiconductor's legacy 2N2222A family-designed for broad compatibility with decades-old designs while meeting modern environmental standards like RoHS and ELV.

FAQ

What is the maximum continuous collector current rating for the P2N2222AZL1?

The P2N2222AZL1 has a maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C. This value decreases with rising ambient temperature due to its 5.0 mW/°C derating factor. At 70°C ambient, the usable I_C drops to approximately 412 mA. The P2N2222AZL1 must be operated within this thermal envelope to avoid junction overheating and premature failure.

Does the P2N2222AZL1 support lead-free soldering processes?

Yes, the P2N2222AZL1 is manufactured in a Pb-free TO-92 package compliant with JEDEC J-STD-020 moisture sensitivity level 1 and RoHS Directive 2011/65/EU. It supports standard lead-free reflow profiles with peak temperatures up to 260°C. The Pb-free version is designated P2N2222AZL1G and shares identical electrical characteristics with the base P2N2222AZL1.

What is the typical DC current gain (h_FE) of the P2N2222AZL1 at 10 mA collector current?

At I_C = 10 mA and V_CE = 10 V, the P2N2222AZL1 exhibits a minimum h_FE of 75 and a typical value of 200. This gain remains stable across −55°C to +125°C, making the P2N2222AZL1 suitable for temperature-critical amplification stages. Gain variation between units is bounded by the datasheet min/max limits-not guaranteed to match other 2222A variants unless binned.

Can the P2N2222AZL1 replace older 2N2222A transistors in existing PCB layouts?

Yes, the P2N2222AZL1 uses the same TO-92 package (Case 29-11, Style 17) with identical pinout (Collector–Base–Emitter on leads 1–2–3) and mechanical dimensions as legacy 2N2222A parts. No PCB changes are required. However, designers should verify that the P2N2222AZL1's slightly lower V_CEO (40 V vs. some 2N2222A versions rated at 45 V) meets system voltage margin requirements.

What is the storage time (t_s) specification for the P2N2222AZL1 under standard switching conditions?

The P2N2222AZL1 has a maximum storage time (t_s) of 225 ns when tested at V_CC = 30 V, I_C = 150 mA, and I_B1 = I_B2 = 15 mA. This parameter reflects minority-carrier removal delay during turn-off and directly impacts maximum switching frequency in PWM or digital logic applications. For higher-speed operation, consider adding a Baker clamp or base resistor network to reduce t_s.

P2N2222AZL1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 40 V

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

Current - Collector Cutoff (Max):: 10nA

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

Power - Max:: 625 mW

Frequency - Transition:: 300MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

P2N2222AZL1 FAQ

1.How can I place an order for P2N2222AZL1 through Aetrix?

Please submit a Request for Quotation (RFQ) for P2N2222AZL1 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 P2N2222AZL1 reliable?

The price and inventory of P2N2222AZL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P2N2222AZL1 is usually 5 days.

3.What payment methods are accepted for P2N2222AZL1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P2N2222AZL1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P2N2222AZL1?

P2N2222AZL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P2N2222AZL1 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 P2N2222AZL1?

For technical support, including P2N2222AZL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P2N2222AZL1 requirements.

6.How does Aetrix verify that P2N2222AZL1 is sourced from the original manufacturer or authorized distributors?

All P2N2222AZL1 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 P2N2222AZL1 meets industry standards.

7.What is the process for return or replacement of P2N2222AZL1?

All P2N2222AZL1 units undergo pre-shipment inspection (PSI). If there is an issue with P2N2222AZL1, 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 P2N2222AZL1 part is unused and in its original packaging.

Return procedure for P2N2222AZL1:

1.Submit a request within 90 days.

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

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