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

onsemi MMBT2222AWT1

Name: MMBT2222AWT1
Brand: onsemi
SKU: MMBT2222AWT1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBT2222AWT1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: MMBT2222AWT1.pdf

Description:: TRANS NPN 40V 0.6A SC70-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBT2222AWT1 from onsemi is an NPN silicon general-purpose transistor in SOT-323 (SC-70) package, rated for 40 V_CEO, 600 mA_C, and 150 mW dissipation at 25°C. It delivers DC current gain (h_FE) from 35 to 300 across 0.1–500 mA collector current, with f_T = 300 MHz and V_CE(sat) ≤ 0.3 V at I_C = 150 mA/I_B = 15 mA - used in low-power switching and amplification circuits in automotive and industrial control modules.

For engineers reviewing the MMBT2222AWT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, SOT-323 thermal resistance (R_JA = 280°C/W), low leakage (I_CEX ≤ 10 nA), and verified switching performance (t_d ≤ 10 ns, t_r ≤ 25 ns) under 3–30 V supply conditions.

Technical Context

This device operates as a discrete bipolar junction transistor with fixed NPN polarity, optimized for linear amplification and saturated switching in surface-mount low-power systems. Its electrical behavior is defined by h-parameter small-signal model (h_ie = 0.25–1.25 kΩ, h_fe = 75–375, h_oe = 25–200 μmhos) and exhibits stable gain-bandwidth product (f_T = 300 MHz) at I_C = 20 mA/V_CE = 20 V.

Thermal design relies on its SC-70 package's 280°C/W junction-to-ambient resistance and −55°C to +150°C operating range, while AEC-Q101 qualification confirms suitability for automotive ambient environments. Switching timing is characterized under pulsed conditions (300 µs width, 2% duty cycle) with specified delay, rise, storage, and fall times.

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 (max)	600 mA - continuous collector current limit defining usable drive capability in switching applications
P_D (FR-5)	150 mW - power dissipation limit on standard FR-5 PCB at 25°C ambient, constraining thermal layout
h_FE @ 150 mA	100–300 - DC current gain range determining base drive requirements for saturation
f_T	300 MHz - unity-gain frequency enabling RF amplifier use up to ~100 MHz with margin
V_CE(sat)	≤ 0.3 V @ I_C/I_B = 10 - low saturation voltage minimizing conduction loss in digital switch designs
t_r	≤ 25 ns - rise time limiting maximum switching frequency in pulse-width modulation circuits

Pinout & Package

The MMBT2222AWT1 is housed in the SC-70 (SOT-323) plastic surface-mount package (Case 419, Style 3), measuring 2.2 mm × 1.35 mm × 0.95 mm with gull-wing leads. Thermal resistance is 280°C/W on FR-5 board at T_A = 25°C.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased junction; requires ~0.7 V_BE and precise I_B to achieve target I_C
2	Emiter	Current return path in common-emitter configuration; connected to ground or low-impedance reference
3	Collector	Output current terminal; handles full load current and must be routed with adequate copper for thermal relief

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive temperature cycling, humidity, and mechanical stress per JESD47
Pb-free, RoHS compliant	Meets EU Directive 2011/65/EU with halogen-free/BFR-free construction
Low input capacitance	C_ibo ≤ 30 pF enables high-frequency small-signal amplification without excessive loading
Fast switching	t_d ≤ 10 ns / t_r ≤ 25 ns supports >10 MHz digital signal routing in logic interface stages
Wide operating temperature	−55°C to +150°C junction range allows deployment in engine bay or industrial motor control enclosures

Applications

Automotive Door Module	Industrial Sensor Interface
Use Scenario: Driving LED status indicators and small relays in door control units exposed to −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Discrete NPN switch controlling 5–24 V loads with <10 µs response to MCU GPIO signals. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; V_CE(sat) ≤ 0.3 V reduces heat generation in sealed modules.	Use Scenario: Amplifying low-level analog outputs (e.g., 0–100 mV) from pressure or temperature transducers. IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing 20–50× voltage gain with minimal noise (NF ≤ 4 dB). Use Value: h_fe ≥ 75 at 10 mA and C_obo ≤ 8 pF preserve signal integrity up to 100 kHz bandwidth.
USB-C Power Delivery Logic	Smart Home Actuator Driver
Use Scenario: Level-shifting and enabling/disabling 5 V auxiliary rails in USB-C PD controller companion circuits. IC Role / Device Role / Timing Role: Low-side switch translating 3.3 V logic to 5 V load control with <30 ns total propagation delay. Use Value: Fast t_r/t_f prevents shoot-through in dual-MOSFET gate drivers; SOT-323 footprint saves space on dense PD IC layouts.	Use Scenario: Driving 12 V solenoids and small DC motors in battery-powered smart locks and HVAC dampers. IC Role / Device Role / Timing Role: Saturated switch delivering up to 600 mA peak current with forced β = 10 for predictable turn-on. Use Value: I_C = 600 mA rating and R_JA = 280°C/W allow intermittent 500 mA operation without heatsink on 2-layer PCB.

Automotive Door Module

Industrial Sensor Interface

Use Scenario: Driving LED status indicators and small relays in door control units exposed to −40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Discrete NPN switch controlling 5–24 V loads with <10 µs response to MCU GPIO signals.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; V_CE(sat) ≤ 0.3 V reduces heat generation in sealed modules.

Use Scenario: Amplifying low-level analog outputs (e.g., 0–100 mV) from pressure or temperature transducers.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing 20–50× voltage gain with minimal noise (NF ≤ 4 dB).

Use Value: h_fe ≥ 75 at 10 mA and C_obo ≤ 8 pF preserve signal integrity up to 100 kHz bandwidth.

USB-C Power Delivery Logic

Smart Home Actuator Driver

Use Scenario: Level-shifting and enabling/disabling 5 V auxiliary rails in USB-C PD controller companion circuits.

IC Role / Device Role / Timing Role: Low-side switch translating 3.3 V logic to 5 V load control with <30 ns total propagation delay.

Use Value: Fast t_r/t_f prevents shoot-through in dual-MOSFET gate drivers; SOT-323 footprint saves space on dense PD IC layouts.

Use Scenario: Driving 12 V solenoids and small DC motors in battery-powered smart locks and HVAC dampers.

IC Role / Device Role / Timing Role: Saturated switch delivering up to 600 mA peak current with forced β = 10 for predictable turn-on.

Use Value: I_C = 600 mA rating and R_JA = 280°C/W allow intermittent 500 mA operation without heatsink on 2-layer PCB.

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
MMBT2222ALT1G	Same die, alternate marking; identical electrical specs and SOT-323 package	No functional difference; used interchangeably in same PCB footprints	Select when sourcing flexibility or alternate date-code availability is required
PN2222A-S	TO-92 package; higher P_D = 625 mW but larger footprint and slower f_T = 250 MHz	Suitable for through-hole prototyping or higher-power analog stages where thermal mass matters more than size	Choose only if SOT-323 assembly is unavailable or thermal derating above 150 mW is needed

Compared with MMBT2222AWT1, MMBT2222ALT1G offers identical performance in the same SOT-323 package, while PN2222A-S trades miniaturization for higher power handling and lower-frequency operation - making the former ideal for space-constrained automotive modules and the latter better for legacy through-hole designs requiring >300 mW dissipation.

Availability

MMBT2222AWT1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal conditioning, and smart home actuator control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MMBT2222AWT1 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 MMBT2222AWT1 belongs to onsemi's general-purpose bipolar transistor family designed for cost-sensitive, high-reliability surface-mount switching and amplification in automotive and industrial control systems.

FAQ

What is the maximum continuous collector current rating for MMBT2222AWT1?

The MMBT2222AWT1 has a maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C on FR-5 board. This value decreases with rising ambient temperature due to thermal derating governed by its 280°C/W junction-to-ambient thermal resistance. At 85°C ambient, the practical I_C limit drops to approximately 350 mA to maintain safe junction temperature below 150°C.

Is MMBT2222AWT1 suitable for automotive applications?

Yes, the MMBT2222AWT1 is AEC-Q101 qualified and PPAP capable, confirming its compliance with automotive reliability standards including temperature cycling, humidity testing, and mechanical shock. Its −55°C to +150°C operating range and Pb-free RoHS construction make it appropriate for under-hood and cabin modules such as door controllers, lighting drivers, and sensor interfaces.

What is the typical DC current gain (h_FE) of MMBT2222AWT1 at 150 mA collector current?

The MMBT2222AWT1 exhibits a DC current gain (h_FE) ranging from 100 to 300 at I_C = 150 mA, V_CE = 10 V, and T_A = 25°C. This wide gain spread reflects process variation and requires circuit design to accommodate minimum h_FE = 100 for guaranteed saturation in switching applications using forced beta = 10.

Does MMBT2222AWT1 have a documented switching speed specification?

Yes, the MMBT2222AWT1 datasheet specifies switching parameters under standardized test conditions: 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, measured with V_CC = 30 V, I_C = 150 mA, and I_B1 = I_B2 = 15 mA. These values support reliable operation in PWM and digital logic interface circuits up to ~5 MHz.

What package type and pin configuration does MMBT2222AWT1 use?

The MMBT2222AWT1 uses the SC-70 (SOT-323) surface-mount package with three gull-wing leads. Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector - matching Style 3 and Style 7 mechanical outlines in onsemi's packaging documentation. This configuration is consistent across all MMBT2222AWT1G and SMMBT2222AWT1G variants.

MMBT2222AWT1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Transistor Type:: NPN

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

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

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 15mA, 150mA

Current - Collector Cutoff (Max):: -

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

Power - Max:: 150 mW

Frequency - Transition:: 300MHz

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-3 (SOT323)

MMBT2222AWT1 FAQ

1.How can I place an order for MMBT2222AWT1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT2222AWT1 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 MMBT2222AWT1 reliable?

The price and inventory of MMBT2222AWT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT2222AWT1 is usually 5 days.

3.What payment methods are accepted for MMBT2222AWT1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT2222AWT1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT2222AWT1?

MMBT2222AWT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT2222AWT1 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 MMBT2222AWT1?

For technical support, including MMBT2222AWT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT2222AWT1 requirements.

6.How does Aetrix verify that MMBT2222AWT1 is sourced from the original manufacturer or authorized distributors?

All MMBT2222AWT1 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 MMBT2222AWT1 meets industry standards.

7.What is the process for return or replacement of MMBT2222AWT1?

All MMBT2222AWT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBT2222AWT1, 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 MMBT2222AWT1 part is unused and in its original packaging.

Return procedure for MMBT2222AWT1:

1.Submit a request within 90 days.

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

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