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

onsemi PN2222A_J61Z

Name: PN2222A_J61Z
Brand: onsemi
SKU: PN2222A_J61Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PN2222A_J61Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: PN2222A_J61Z.pdf

Description:: TRANS NPN 40V 1A TO-92-3

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Product details

Overview

PN2222A_J61Z 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 PN2222A_J61Z datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 J61Z lead configuration, 625 mW power dissipation at 25°C, saturation voltage of 0.3 V at I_C = 150 mA / I_B = 15 mA, and thermal resistance of 200 °C/W (junction-to-ambient).

Technical Context

The PN2222A_J61Z operates as a standard NPN silicon BJT with fixed emitter-base and collector-base junction structures optimized for linear amplification and saturated switching. Its h_FE varies significantly with collector current - from ≥35 at 0.1 mA to ≥100 at 150 mA - indicating strong current-dependent gain behavior suitable for bias-stable Class-A amplifiers or robust digital switching.

Switching performance is characterized by 10 ns delay time, 25 ns rise time, 225 ns storage time, and 60 ns fall time under specified test conditions (V_CC = 30 V, I_C = 150 mA), confirming suitability for low-to-moderate speed switching up to ~1–2 MHz. The device exhibits 300 MHz current-gain bandwidth product (f_T) at I_C = 20 mA, enabling limited RF amplification in HF bands.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before avalanche breakdown; defines upper rail limit in switch or amplifier designs.
I_C (max)	1.0 A - Absolute maximum continuous collector current; derated above 25°C per 5.0 mW/°C thermal slope.
P_D	625 mW - Total power dissipation at 25°C ambient; requires heatsinking or layout derating for sustained high-current operation.
h_FE	35–300 - DC current gain range across I_C = 0.1 mA to 150 mA; critical for bias network design and gain stability.
V_CE(sat)	0.3 V @ I_C=150 mA/I_B=15 mA - Low saturation voltage enables efficient switching with minimal conduction loss.
f_T	300 MHz - Current-gain bandwidth product; sets usable small-signal amplification limit in common-emitter configuration.

Pinout & Package

PN2222A_J61Z is housed in a TO-92 package with J61Z lead form: molded 0.200-inch inline spacing, straight leads, and E-B-C pin order when viewed with flat side facing outward and leads pointing down. This variant complies with JEDEC TO-92 standards and differs from standard TO-92AM3 (ZA03D) in lead pitch and forming.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal	Reference node for base drive; connects to ground or low-impedance return path in common-emitter configurations.
Base (B)	Control input	Accepts forward-biased current to turn on transistor; requires series resistor to limit I_B and ensure saturation or linear operation.
Collector (C)	Current source terminal	Delivers amplified or switched load current; connects to supply rail via load in common-emitter topology.

Key Features

Feature	Design Value
Medium-power switching capability	Supports up to 500 mA collector current in saturated switching mode with V_CE(sat) ≤ 1.0 V, minimizing power loss in driver circuits.
Wide h_FE range across operating currents	Enables flexible bias design: stable low-current amplification (≥35 at 0.1 mA) and high-current switching gain (≥100 at 150 mA).
Low-noise amplification	4.0 dB noise figure at I_C = 100 μA enables use in preamplifier stages where signal integrity is critical.
Thermally robust packaging	TO-92 J61Z form provides standardized mounting and solderability while maintaining R_θJA = 200 °C/W for board-level thermal management.

Applications

Audio Preamp Stage	Microcontroller GPIO Driver
Use Scenario: Amplifying weak line-level audio signals (e.g., from electret microphones or passive pickups) before ADC sampling or further processing. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology providing voltage and current gain with low distortion at audio frequencies. Use Value: 300 MHz f_T and 4.0 dB noise figure support clean amplification up to 20 kHz; h_FE ≥75 at 10 mA ensures predictable biasing with standard resistor networks.	Use Scenario: Driving LEDs, relays, or small solenoids from 3.3 V or 5 V microcontroller I/O pins with current limiting and level translation. IC Role / Device Role / Timing Role: Digital switch translating logic-high output into sufficient collector current to energize external loads. Use Value: V_CE(sat) = 0.3 V at I_C/I_B = 150 mA/15 mA ensures <100 mW conduction loss; 225 ns storage time allows reliable 100 kHz+ PWM control.
DC Motor Speed Control	Discrete Logic Level Shifter
Use Scenario: Controlling brushed DC motor speed via PWM in battery-powered tools or robotics using low-voltage logic and higher-voltage motor rails. IC Role / Device Role / Timing Role: High-side or low-side switch modulating motor current based on PWM duty cycle. Use Value: 1.0 A I_C rating supports motors drawing up to 800 mA continuously; 625 mW P_D permits short bursts at full load without thermal shutdown.	Use Scenario: Translating 1.8 V or 3.3 V logic outputs to 5 V or 12 V levels for interfacing with legacy peripherals or industrial sensors. IC Role / Device Role / Timing Role: Active pull-up/pull-down stage converting voltage domains while preserving signal edge integrity. Use Value: Fast switching (10 ns td, 25 ns tr) maintains timing margins; low C_ibo = 25 pF minimizes capacitive loading on driving logic.

Audio Preamp Stage

Microcontroller GPIO Driver

Use Scenario: Amplifying weak line-level audio signals (e.g., from electret microphones or passive pickups) before ADC sampling or further processing.

IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology providing voltage and current gain with low distortion at audio frequencies.

Use Value: 300 MHz f_T and 4.0 dB noise figure support clean amplification up to 20 kHz; h_FE ≥75 at 10 mA ensures predictable biasing with standard resistor networks.

Use Scenario: Driving LEDs, relays, or small solenoids from 3.3 V or 5 V microcontroller I/O pins with current limiting and level translation.

IC Role / Device Role / Timing Role: Digital switch translating logic-high output into sufficient collector current to energize external loads.

Use Value: V_CE(sat) = 0.3 V at I_C/I_B = 150 mA/15 mA ensures <100 mW conduction loss; 225 ns storage time allows reliable 100 kHz+ PWM control.

DC Motor Speed Control

Discrete Logic Level Shifter

Use Scenario: Controlling brushed DC motor speed via PWM in battery-powered tools or robotics using low-voltage logic and higher-voltage motor rails.

IC Role / Device Role / Timing Role: High-side or low-side switch modulating motor current based on PWM duty cycle.

Use Value: 1.0 A I_C rating supports motors drawing up to 800 mA continuously; 625 mW P_D permits short bursts at full load without thermal shutdown.

Use Scenario: Translating 1.8 V or 3.3 V logic outputs to 5 V or 12 V levels for interfacing with legacy peripherals or industrial sensors.

IC Role / Device Role / Timing Role: Active pull-up/pull-down stage converting voltage domains while preserving signal edge integrity.

Use Value: Fast switching (10 ns td, 25 ns tr) maintains timing margins; low C_ibo = 25 pF minimizes capacitive loading on driving logic.

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	SOT-23 surface-mount package; lower P_D (310 mW); h_FE min 100 @ I_C = 150 mA; same V_CEO/V_CBO.	Preferred for space-constrained PCBs; not suitable for >310 mW continuous dissipation or through-hole assembly.	Select when automated SMT assembly and board area savings outweigh need for through-hole serviceability or higher power handling.
PN2222A_TFR	Same die and specs; TO-92 tape-and-reel packaging variant (J61Z lead form confirmed); identical electrical parameters and thermal ratings.	No functional difference; only differs in packaging format (tape/reel vs. bulk/ammo) and ordering part number suffix.	Choose for high-volume automated insertion; electrically and mechanically interchangeable with PN2222A_J61Z in all designs.

Compared with MMBT2222ALT1G and PN2222A_TFR, PN2222A_J61Z offers through-hole reliability and 625 mW thermal headroom ideal for prototyping and medium-power discrete designs, whereas the SOT-23 variant trades power for density, and the TFR variant matches it exactly in function but differs only in packaging logistics.

Availability

PN2222A_J61Z is available at Aetrix Electronics and suitable for audio preamplification, microcontroller GPIO interfacing, and DC motor control requiring stable component supply, consistent parametric performance across production lots, and long-term industrial availability.

Supply support for PN2222A_J61Z 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 management, analog, sensor, and logic solutions for automotive, industrial, cloud computing, and consumer markets.

The PN2222A_J61Z belongs to ON Semiconductor's legacy general-purpose bipolar transistor product line, originally developed by Fairchild Semiconductor and maintained for cost-sensitive, high-reliability discrete amplifier and switching applications.

FAQ

What is the pin configuration of PN2222A_J61Z?

The PN2222A_J61Z uses a TO-92 package with J61Z lead form: when viewing the flat side of the package with leads pointing downward, the left-to-right pin order is Emitter (E), Base (B), Collector (C). This matches JEDEC-standard TO-92 pinout and is verified in Fairchild's ZA03F package drawing.

Does PN2222A_J61Z support switching at 100 kHz?

Yes, PN2222A_J61Z supports reliable switching at 100 kHz due to its 10 ns delay time, 25 ns rise time, and 60 ns fall time under standard test conditions. Storage time of 225 ns is the limiting factor, but proper base drive (e.g., active pull-down) mitigates this in practical PWM circuits using PN2222A_J61Z.

What is the maximum power dissipation of PN2222A_J61Z at 70°C ambient?

At 70°C ambient, PN2222A_J61Z has a derated power dissipation of 412.5 mW. This is calculated from its 625 mW rating at 25°C and 5.0 mW/°C derating slope: 625 mW − (5.0 mW/°C × 45°C) = 412.5 mW. Exceeding this risks junction temperature exceeding 150°C.

Can PN2222A_J61Z replace BC547 in existing designs?

PN2222A_J61Z can replace BC547 in many linear and switching applications, but caution is required: BC547 has lower V_CEO (45 V vs. 40 V), higher h_FE spread (110–800), and different saturation characteristics. Verify V_CE(sat), thermal limits, and gain stability in the target circuit before substituting PN2222A_J61Z.

Is PN2222A_J61Z RoHS compliant and halogen-free?

Yes, PN2222A_J61Z is RoHS compliant and halogen-free per ON Semiconductor's product change notification PCN-170101-001 and material declarations. It meets EU Directive 2011/65/EU and IEC 61249-2-21:2013 requirements, with no intentionally added brominated or chlorinated flame retardants.

PN2222A_J61Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1 A

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

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

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

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

Power - Max:: 625 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

PN2222A_J61Z FAQ

1.How can I place an order for PN2222A_J61Z through Aetrix?

Please submit a Request for Quotation (RFQ) for PN2222A_J61Z 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 PN2222A_J61Z reliable?

The price and inventory of PN2222A_J61Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PN2222A_J61Z is usually 5 days.

3.What payment methods are accepted for PN2222A_J61Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PN2222A_J61Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PN2222A_J61Z?

PN2222A_J61Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PN2222A_J61Z 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 PN2222A_J61Z?

For technical support, including PN2222A_J61Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PN2222A_J61Z requirements.

6.How does Aetrix verify that PN2222A_J61Z is sourced from the original manufacturer or authorized distributors?

All PN2222A_J61Z 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 PN2222A_J61Z meets industry standards.

7.What is the process for return or replacement of PN2222A_J61Z?

All PN2222A_J61Z units undergo pre-shipment inspection (PSI). If there is an issue with PN2222A_J61Z, 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 PN2222A_J61Z part is unused and in its original packaging.

Return procedure for PN2222A_J61Z:

1.Submit a request within 90 days.

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

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