MPS2222G Equivalent & Substitute Parts

Part Overview

The MPS2222G is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. It features a maximum collector current of 600 mA, collector-emitter breakdown voltage of 30 V, and operates across a temperature range of -55°C to 150°C. The device is packaged in a through-hole TO-92 configuration.

The MPS2222G is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance or redesign initiatives.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	600	mA
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	1.6 V @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	10	nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 150 mA, 10 V	—
Power - Max	625	mW
Frequency - Transition	250	MHz
Operating Temperature	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MPS2222G is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector current rating (Ic Max) must equal or exceed 600 mA
Collector-emitter breakdown voltage (Vceo Max) must equal or exceed 30 V
DC current gain (hFE) must meet or exceed 100 @ 150 mA, 10 V
Operating temperature range must encompass -55°C to 150°C
Collector cutoff current (ICBO) must not exceed 10 nA

Mechanical Compatibility Criteria:

Package type determines physical fit and PCB layout compatibility
Through-hole packages (TO-92) are not directly interchangeable with surface-mount packages (SOT-23) without circuit board redesign

The MMBT2222ALT1G meets all electrical criteria for substitution. However, it employs a surface-mount SOT-23-3 package, which requires different PCB layout and assembly methods compared to the through-hole TO-92 package of the MPS2222G.

Parameter Comparison

Parameter	MPS2222G	MMBT2222ALT1G	Notes
Transistor Type	NPN	NPN	Identical
Current - Collector (Ic) Max	600 mA	600 mA	Identical
Voltage - Collector Emitter Breakdown (Max)	30 V	40 V	MMBT2222ALT1G rated higher
Vce Saturation (Max) @ Ib, Ic	1.6 V @ 50 mA, 500 mA	1.0 V @ 50 mA, 500 mA	MMBT2222ALT1G lower saturation voltage
Current - Collector Cutoff (Max)	10 nA	10 nA	Identical
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 150 mA, 10 V	100 @ 150 mA, 10 V	Identical
Power - Max	625 mW	225 mW	MPS2222G rated higher
Frequency - Transition	250 MHz	300 MHz	MMBT2222ALT1G higher frequency
Operating Temperature	-55 to 150 °C	-55 to 150 °C	Identical
Mounting Type	Through Hole	Surface Mount	Different assembly method required
Package / Case	TO-92-3	SOT-23-3	Different physical form factor
Product Status	Obsolete	Active	MMBT2222ALT1G actively manufactured
Qualification	—	AEC-Q101	MMBT2222ALT1G automotive qualified

Engineering Selection Recommendations

For Direct Through-Hole Replacement: No direct through-hole substitute is provided in the available data. The MPS2222G TO-92 package cannot be replaced with a surface-mount device without PCB redesign and assembly process modification.

For Surface-Mount Redesign: The MMBT2222ALT1G is electrically suitable for applications where the MPS2222G was used, provided the following conditions are met:

Circuit design accommodates the lower maximum power dissipation (225 mW vs. 625 mW)
PCB layout is redesigned for SOT-23-3 surface-mount assembly
Manufacturing process supports surface-mount soldering

The MMBT2222ALT1G offers advantages including active product status, AEC-Q101 automotive qualification, higher collector-emitter breakdown voltage (40 V vs. 30 V), lower saturation voltage, and higher transition frequency (300 MHz vs. 250 MHz).

Frequently Asked Questions (FAQ)

Q: Can the MMBT2222ALT1G be used as a direct pin-for-pin replacement for the MPS2222G?

A: No. While both devices are NPN transistors with identical collector current and DC current gain specifications, they use different package types. The MPS2222G uses a through-hole TO-92 package, and the MMBT2222ALT1G uses a surface-mount SOT-23-3 package. Direct substitution requires PCB redesign and different assembly methods.

Q: What are the key electrical differences between these parts?

A: The MMBT2222ALT1G has a higher collector-emitter breakdown voltage (40 V vs. 30 V), lower saturation voltage (1.0 V vs. 1.6 V), higher transition frequency (300 MHz vs. 250 MHz), but lower maximum power dissipation (225 mW vs. 625 mW). Both share identical collector current, cutoff current, and DC current gain specifications.

Q: Is the MMBT2222ALT1G suitable for high-power applications?

A: The MMBT2222ALT1G has a maximum power rating of 225 mW, which is lower than the MPS2222G (625 mW). Applications requiring sustained power dissipation above 225 mW should not use the MMBT2222ALT1G without thermal analysis and design verification.

Q: What is the product status difference, and why does it matter?

A: The MPS2222G is obsolete and no longer manufactured. The MMBT2222ALT1G is active and in production. For new designs or long-term supply assurance, the MMBT2222ALT1G is the preferred choice. For legacy system maintenance, existing MPS2222G inventory may be available through authorized distributors.

Q: Does the MMBT2222ALT1G have any additional certifications?

A: Yes. The MMBT2222ALT1G carries AEC-Q101 automotive qualification, indicating it meets automotive industry reliability and quality standards. The MPS2222G does not list automotive qualification.

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