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

onsemi MMBT2222AT

Name: MMBT2222AT
Brand: onsemi
SKU: MMBT2222AT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBT2222AT

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-89, SOT-490

Datasheet:: MMBT2222AT.pdf

Description:: TRANS NPN 40V 0.6A SC-89-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBT2222AT from onsemi is an NPN silicon general-purpose transistor in SOT-416/SC-75 package, rated for 40 V_CEO, 600 mA_C, and 150 mW dissipation, with DC current gain (h_FE) ranging from 35 to 100 across 0.1–150 mA collector current, used in low-power amplifier and switching circuits in automotive and industrial control modules.

For engineers reviewing the MMBT2222AT datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, 300 MHz f_T, 8.0 pF C_obo, SOT-416 thermal resistance of 833°C/W, and verified performance at −55°C to +150°C junction temperature.

Technical Context

This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined V_CE(sat) ≤ 0.3 V at I_C = 150 mA / I_B = 15 mA and V_BE(sat) ≤ 1.2 V under same conditions. Its small-signal parameters include h_fe = 75–375 at 10 mA, f_T = 300 MHz, and noise figure ≤ 4.0 dB at 1 kHz.

Switching behavior is characterized by t_d ≤ 10 ns, t_r ≤ 25 ns, t_s ≤ 225 ns, and t_f ≤ 60 ns under specified test conditions (V_CC = 30 V, I_C = 150 mA, I_B1 = I_B2 = 15 mA), with input capacitance C_ibo ≤ 30 pF and output capacitance C_obo ≤ 8.0 pF at 1 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 (max)	600 mA - Continuous collector current limit defining maximum linear/saturation drive capability.
P_D	150 mW - Total power dissipation at 25°C ambient, constrained by SOT-416 thermal resistance of 833°C/W.
f_T	300 MHz - Current-gain bandwidth product indicating usable frequency range for small-signal amplification.
h_FE @ 150 mA	100 - Minimum DC current gain at high-current switching point, ensuring reliable base drive margin.
C_obo	8.0 pF - Output capacitance limiting high-frequency response and affecting switching speed in capacitive loads.
T_J Range	−55°C to +150°C - Junction temperature operating range confirming suitability for under-hood automotive environments.

Pinout & Package

SOT-416/SC-75 three-terminal surface-mount package (1.60 × 0.80 × 0.80 mm, 1.00 mm pitch), optimized for low-power PCB space-constrained designs with FR4 thermal footprint compliance.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal accepting forward-biased current to enable conduction between collector and emitter.
2	Emiter	Current sink node in common-emitter configuration; referenced to ground or low-side return path.
3	Collector	Current source node connected to load or supply rail; carries full switched/signal current.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces.
Pb-free, Halogen-free/BFR-free	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A moisture sensitivity level 1 (MSL-1).
Low-input capacitance	C_ibo ≤ 30 pF enables fast turn-on without excessive base charge delay in digital switching.
High f_T	300 MHz bandwidth supports audio preamplifier stages and RF detector bias networks up to ~100 MHz.
Wide temperature operation	Guaranteed parametric performance from −55°C to +150°C eliminates derating in harsh-environment designs.

Applications

Automotive Door Module	Industrial PLC Input Stage
Use Scenario: Level-shifting and buffering of 12 V switch inputs to 3.3 V microcontroller GPIOs in door latch and window control units. IC Role / Device Role / Timing Role: NPN switch providing galvanic isolation and voltage translation with <10 ns propagation delay. Use Value: Enables direct interface to battery-supplied sensors while maintaining MCU-safe logic levels and meeting AEC-Q101 reliability requirements.	Use Scenario: Optocoupler driver stage in 24 V DC digital input modules for programmable logic controllers. IC Role / Device Role / Timing Role: Low-side switch delivering 150 mA drive current to LED anode of industrial optocouplers. Use Value: Ensures consistent LED forward current across temperature with V_CE(sat) ≤ 0.3 V, minimizing power loss and heat rise in dense I/O modules.
Consumer Audio Preamp	Medical Sensor Signal Conditioning
Use Scenario: First-stage small-signal amplification in portable headphone amplifiers using single-supply 3.3 V rails. IC Role / Device Role / Timing Role: Common-emitter amplifier with h_fe ≥ 75 at 10 mA, configured for 20 dB voltage gain and <4 dB noise figure. Use Value: Delivers low-noise, high-linearity amplification without requiring dual supplies or complex bias networks.	Use Scenario: Transimpedance amplifier feedback transistor in photodiode-based pulse oximeter front-ends. IC Role / Device Role / Timing Role: High-f_T (300 MHz) NPN supporting stable gain-bandwidth product in 100 kHz–1 MHz physiological signal bands. Use Value: Maintains phase margin and minimizes settling time in closed-loop analog front-ends processing weak optical signals.

Automotive Door Module

Industrial PLC Input Stage

Use Scenario: Level-shifting and buffering of 12 V switch inputs to 3.3 V microcontroller GPIOs in door latch and window control units.

IC Role / Device Role / Timing Role: NPN switch providing galvanic isolation and voltage translation with <10 ns propagation delay.

Use Value: Enables direct interface to battery-supplied sensors while maintaining MCU-safe logic levels and meeting AEC-Q101 reliability requirements.

Use Scenario: Optocoupler driver stage in 24 V DC digital input modules for programmable logic controllers.

IC Role / Device Role / Timing Role: Low-side switch delivering 150 mA drive current to LED anode of industrial optocouplers.

Use Value: Ensures consistent LED forward current across temperature with V_CE(sat) ≤ 0.3 V, minimizing power loss and heat rise in dense I/O modules.

Consumer Audio Preamp

Medical Sensor Signal Conditioning

Use Scenario: First-stage small-signal amplification in portable headphone amplifiers using single-supply 3.3 V rails.

IC Role / Device Role / Timing Role: Common-emitter amplifier with h_fe ≥ 75 at 10 mA, configured for 20 dB voltage gain and <4 dB noise figure.

Use Value: Delivers low-noise, high-linearity amplification without requiring dual supplies or complex bias networks.

Use Scenario: Transimpedance amplifier feedback transistor in photodiode-based pulse oximeter front-ends.

IC Role / Device Role / Timing Role: High-f_T (300 MHz) NPN supporting stable gain-bandwidth product in 100 kHz–1 MHz physiological signal bands.

Use Value: Maintains phase margin and minimizes settling time in closed-loop analog front-ends processing weak optical signals.

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
BC847BW	Higher h_FE (110–220), lower V_CEO (45 V), same SOT-323 package but larger footprint than SOT-416.	Preferred in precision biasing where higher gain stability is required; less suitable for ultra-dense layouts.	Select BC847BW when gain consistency >100 is needed and board area allows SOT-323 placement.
PN2222A	TO-92 through-hole package, higher P_D (625 mW), identical electrical specs but no AEC-Q101 qualification.	Used in prototyping and non-automotive production where manual assembly or higher power dissipation is acceptable.	Choose PN2222A for breadboarding or cost-sensitive non-automotive applications without thermal or qualification constraints.

Compared with BC847BW and PN2222A, the MMBT2222AT uniquely combines AEC-Q101 qualification, SOT-416 miniaturization, and guaranteed 300 MHz f_T-making it optimal for space-constrained automotive and industrial surface-mount assemblies requiring validated reliability.

Availability

MMBT2222AT is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and portable audio preamplifiers requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for MMBT2222AT 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 is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MMBT2222AT belongs to onsemi's general-purpose bipolar transistor product line, engineered for robust, low-cost switching and amplification in space-constrained, thermally demanding applications across automotive and industrial segments.

FAQ

What is the maximum continuous collector current rating for the MMBT2222AT?

The MMBT2222AT has a maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C. This value is thermally limited by its 150 mW power dissipation and 833°C/W junction-to-ambient thermal resistance. Derating is required above 25°C ambient per the datasheet's thermal curve, and pulsed operation allows higher peak currents within duty cycle limits.

Is the MMBT2222AT qualified for automotive applications?

Yes, the MMBT2222AT (specifically the NSVMMBT2222ATT1G variant) is AEC-Q101 qualified and PPAP capable. The "NSV" prefix denotes automotive-grade manufacturing controls, site-specific traceability, and stress testing per the AEC-Q101 standard-making the MMBT2222AT suitable for under-hood and cabin electronics where reliability and failure mode analysis are mandatory.

What is the pin configuration of the MMBT2222AT in its SOT-416 package?

The MMBT2222AT uses the SOT-416 (SC-75) package with pin 1 = Base, pin 2 = Emitter, and pin 3 = Collector. This configuration is confirmed in the official onsemi datasheet (document MMBT2222ATT1/D), mechanical outline CASE 463, and marking diagram. No alternate pinouts are specified for this part number.

Does the MMBT2222AT have RoHS and halogen-free compliance?

Yes, the MMBT2222AT is Pb-free, halogen-free/BFR-free, and fully RoHS compliant per Directive 2011/65/EU. This is explicitly stated in the "Features" section of the onsemi datasheet and verified in the "Ordering Information" table, where both MMBT2222ATT1G and NSVMMBT2222ATT1G carry the "Pb-Free" designation and meet JEDEC J-STD-609A standards.

What is the typical transition frequency (f_T) of the MMBT2222AT and how is it measured?

The MMBT2222AT has a minimum transition frequency (f_T) of 300 MHz, measured under conditions of I_C = 20 mA, V_CE = 20 V, and f = 100 MHz. This parameter reflects the frequency at which the small-signal current gain (h_fe) drops to unity and is critical for high-speed switching and RF bias applications-verified in the "Small-Signal Characteristics" table of the official datasheet.

MMBT2222AT Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-89, SOT-490

Packaging:: Tape & Reel (TR)

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):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-89-3

MMBT2222AT FAQ

1.How can I place an order for MMBT2222AT through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT2222AT 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 MMBT2222AT reliable?

The price and inventory of MMBT2222AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT2222AT is usually 5 days.

3.What payment methods are accepted for MMBT2222AT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT2222AT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT2222AT?

MMBT2222AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT2222AT 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 MMBT2222AT?

For technical support, including MMBT2222AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT2222AT requirements.

6.How does Aetrix verify that MMBT2222AT is sourced from the original manufacturer or authorized distributors?

All MMBT2222AT 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 MMBT2222AT meets industry standards.

7.What is the process for return or replacement of MMBT2222AT?

All MMBT2222AT units undergo pre-shipment inspection (PSI). If there is an issue with MMBT2222AT, 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 MMBT2222AT part is unused and in its original packaging.

Return procedure for MMBT2222AT:

1.Submit a request within 90 days.

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

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