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

onsemi MPS2222AZL1G

Name: MPS2222AZL1G
Brand: onsemi
SKU: MPS2222AZL1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPS2222AZL1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPS2222AZL1G.pdf

Description:: TRANS NPN 40V 0.6A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPS2222AZL1G from onsemi is an NPN silicon general-purpose transistor in TO-92 package, rated for 40 V_CEO, 600 mA continuous collector current, and 625 mW power dissipation at T_A = 25°C. It delivers DC current gain (h_FE) of 100–300 at I_C = 10 mA, V_CE = 10 V, and exhibits f_T = 300 MHz - enabling use in low-power switching and small-signal amplification circuits such as LED drivers and sensor interface stages.

For engineers reviewing the MPS2222AZL1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 40 V_CEO rating, Pb-free TO-92 packaging, guaranteed h_FE ≥ 100 at 10 mA, low V_CE(sat) ≤ 0.3 V at I_C/I_B = 10, and validated switching performance with t_d ≤ 10 ns and t_r ≤ 25 ns.

Technical Context

This device operates as a medium-speed, medium-current NPN bipolar junction transistor optimized for linear amplification and saturated switching. Its f_T = 300 MHz and C_ibo = 25 pF support stable gain up to VHF frequencies under low-impedance bias conditions, while the 6.0 V_EBO rating enables robust base-emitter reverse tolerance in digital logic interfacing.

The MPS2222AZL1G shares the MPS2222A family's enhanced electrical specifications over the legacy MPS2222 - including +25% higher V_CEO, +17% higher V_CBO, and improved leakage control (I_CEX ≤ 10 nA, I_CB0 ≤ 0.01 A), all verified under standardized test conditions per JEDEC JESD22-A108.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Supports rail voltages up to 36 V DC in industrial control I/O stages without derating.
I_C (continuous)	600 mA - Sufficient to drive relays, small solenoids, or multiple parallel LEDs directly.
h_FE @ 10 mA	100–300 - Enables single-stage current amplification with predictable bias stability across temperature.
V_CE(sat) @ 150 mA	≤ 0.3 V - Minimizes conduction loss and self-heating in high-duty-cycle switching applications.
f_T	300 MHz - Permits use in RF preamplifiers up to ~100 MHz with adequate gain margin.
P_D @ T_A = 25°C	625 mW - Allows operation in ambient temperatures up to 70°C with standard PCB copper area.
R_JA	200 °C/W - Confirms thermal performance with minimal heatsinking in TO-92 through-hole mounting.

Pinout & Package

Package: TO-92 (Case 29-11, Style 1), Pb-free, through-hole compatible. Dimensions per ANSI Y14.5M: body height 4.45–5.20 mm, lead pitch 2.54 mm, lead diameter 0.407–0.533 mm.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-side return path; defines reference for V_BE and V_CE biasing.
2 (Base)	Control input	Receives current-limited drive signal; requires series resistor to limit I_B and ensure saturation.
3 (Collector)	Current source terminal	Connected to load and supply rail; carries full switched current with minimal voltage drop in saturation.

Key Features

Feature	Design Value
Enhanced breakdown ratings	V_CEO = 40 V and V_CBO = 75 V exceed legacy MPS2222 by 33% and 25%, improving system margin in 24 V industrial rails.
Low leakage performance	I_CEX ≤ 10 nA and I_CB0 ≤ 0.01 A enable reliable operation in battery-powered standby circuits.
High-frequency capability	f_T = 300 MHz supports broadband analog amplification and fast digital switching up to 50 MHz clock rates.
Thermal robustness	Junction temperature range −55°C to +150°C allows deployment in automotive engine compartments and outdoor enclosures.
Pb-free compliance	RoHS-compliant TO-92 packaging meets IPC-J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.

Applications

LED Driver Circuit	Microcontroller GPIO Expander
Use Scenario: Driving 20 mA white LEDs from 3.3 V or 5 V microcontroller outputs via current-limiting resistor. IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink LED current with minimal V_CE(sat). Use Value: V_CE(sat) ≤ 0.3 V at I_C = 20 mA ensures >95% efficiency and <6 mW dissipation per channel.	Use Scenario: Level-shifting and current boosting for 3.3 V MCU GPIO pins controlling 5 V peripheral logic or optocouplers. IC Role / Device Role / Timing Role: Digital buffer amplifier providing 5 V-compatible output swing and 100 mA peak drive capability. Use Value: h_FE ≥ 100 at I_C = 10 mA enables direct drive from 1 mA MCU output without external bias resistors.
Industrial Sensor Interface	Relay Driver Stage
Use Scenario: Amplifying low-level analog signals (e.g., thermistor or RTD bridge outputs) before ADC sampling. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed-gain bias network. Use Value: Input impedance h_ie = 2.0 kΩ at I_C = 1 mA provides stable loading for passive sensor networks.	Use Scenario: Switching 12 V/500 mA electromagnetic relays in PLC I/O modules using MCU-controlled base drive. IC Role / Device Role / Timing Role: High-current saturated switch with flyback diode protection. Use Value: I_C = 600 mA rating and t_s ≤ 225 ns ensure clean relay actuation without contact chatter or coil overvoltage.

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA white LEDs from 3.3 V or 5 V microcontroller outputs via current-limiting resistor.

IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink LED current with minimal V_CE(sat).

Use Value: V_CE(sat) ≤ 0.3 V at I_C = 20 mA ensures >95% efficiency and <6 mW dissipation per channel.

Use Scenario: Level-shifting and current boosting for 3.3 V MCU GPIO pins controlling 5 V peripheral logic or optocouplers.

IC Role / Device Role / Timing Role: Digital buffer amplifier providing 5 V-compatible output swing and 100 mA peak drive capability.

Use Value: h_FE ≥ 100 at I_C = 10 mA enables direct drive from 1 mA MCU output without external bias resistors.

Industrial Sensor Interface

Relay Driver Stage

Use Scenario: Amplifying low-level analog signals (e.g., thermistor or RTD bridge outputs) before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed-gain bias network.

Use Value: Input impedance h_ie = 2.0 kΩ at I_C = 1 mA provides stable loading for passive sensor networks.

Use Scenario: Switching 12 V/500 mA electromagnetic relays in PLC I/O modules using MCU-controlled base drive.

IC Role / Device Role / Timing Role: High-current saturated switch with flyback diode protection.

Use Value: I_C = 600 mA rating and t_s ≤ 225 ns ensure clean relay actuation without contact chatter or coil overvoltage.

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	V_CEO = 30 V, h_FE min = 75 at 10 mA, non-Pb-free default packaging	Limited to ≤24 V systems; requires requalification for RoHS-compliant production	Select when cost sensitivity outweighs voltage margin and Pb-free requirement.
MMBT2222ALT1G	SOT-23 surface-mount package, same V_CEO/I_C/h_FE specs, 300 MHz f_T	Requires PCB redesign for SMT assembly; unsuitable for through-hole prototyping or repair	Choose for space-constrained boards where automated placement and thermal performance justify layout change.

Compared with PN2222A and MMBT2222ALT1G, the MPS2222AZL1G offers superior voltage headroom (40 V vs. 30 V), guaranteed Pb-free compliance in TO-92, and tighter h_FE distribution - making it optimal for new industrial designs requiring long-term supply stability and regulatory alignment.

Availability

MPS2222AZL1G is available at Aetrix Electronics and suitable for industrial control I/O modules, LED lighting subsystems, and sensor signal conditioning circuits requiring stable component supply across multi-year production cycles.

Supply support for MPS2222AZL1G 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The MPS2222AZL1G belongs to the MPS2222A family of general-purpose NPN transistors designed for cost-sensitive, high-reliability linear and switching applications in industrial automation, consumer electronics, and communications equipment.

FAQ

What is the maximum collector-emitter voltage rating for MPS2222AZL1G?

The MPS2222AZL1G has a maximum collector-emitter voltage (V_CEO) rating of 40 Vdc, verified per JEDEC test condition IC = 10 mA, IB = 0 at TA = 25°C. This exceeds the 30 V rating of the legacy MPS2222 and supports reliable operation in 24 V industrial power domains with safety margin.

Does MPS2222AZL1G meet RoHS requirements?

Yes, MPS2222AZL1G is explicitly marked as Pb-free in the onsemi datasheet (MPS2222/D, Rev. 2) and shipped in TO-92 packaging compliant with EU RoHS Directive 2011/65/EU. The "G" suffix denotes Pb-free construction, and the device meets IPC-J-STD-020 MSL-1 handling standards.

What is the typical DC current gain (hFE) of MPS2222AZL1G at 10 mA collector current?

The MPS2222AZL1G specifies h_FE = 100–300 at I_C = 10 mA, V_CE = 10 V, and T_A = 25°C. This range is confirmed in the Electrical Characteristics table on page 2 of the official datasheet and reflects the device's suitability for precision biasing in amplifier and switch applications.

Can MPS2222AZL1G be used in high-frequency amplifier designs?

Yes, the MPS2222AZL1G has a current-gain bandwidth product (f_T) of 300 MHz, measured at I_C = 20 mA, V_CE = 20 V, and f = 100 MHz. This enables stable small-signal amplification up to ~100 MHz with appropriate matching networks and bias stabilization.

What is the thermal resistance junction-to-ambient (RJA) for MPS2222AZL1G?

The thermal resistance junction-to-ambient (R_JA) for MPS2222AZL1G is 200 °C/W, specified for the TO-92 package mounted on a standard FR-4 PCB with minimal copper area. This value is critical for calculating maximum allowable power dissipation at elevated ambient temperatures.

MPS2222AZL1G 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 (ICBO)

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)

MPS2222AZL1G FAQ

1.How can I place an order for MPS2222AZL1G through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS2222AZL1G 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 MPS2222AZL1G reliable?

The price and inventory of MPS2222AZL1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS2222AZL1G is usually 5 days.

3.What payment methods are accepted for MPS2222AZL1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS2222AZL1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS2222AZL1G?

MPS2222AZL1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS2222AZL1G 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 MPS2222AZL1G?

For technical support, including MPS2222AZL1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS2222AZL1G requirements.

6.How does Aetrix verify that MPS2222AZL1G is sourced from the original manufacturer or authorized distributors?

All MPS2222AZL1G 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 MPS2222AZL1G meets industry standards.

7.What is the process for return or replacement of MPS2222AZL1G?

All MPS2222AZL1G units undergo pre-shipment inspection (PSI). If there is an issue with MPS2222AZL1G, 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 MPS2222AZL1G part is unused and in its original packaging.

Return procedure for MPS2222AZL1G:

1.Submit a request within 90 days.

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

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