PMST2222,115 Equivalent & Substitute Parts

Part Overview

The PMST2222,115 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount device operates at 30 V collector-emitter breakdown voltage with a maximum collector current of 600 mA and transition frequency of 250 MHz. The part is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance.

Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when design specifications permit operation within the electrical and mechanical parameters of equivalent devices.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	30	V
Current - Collector (Ic) (Max)	600	mA
Power - Max	200	mW
Frequency - Transition	250	MHz
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
Operating Temperature (Max)	150	°C
DC Current Gain (hFE) (Min)	100 @ 150mA, 10V	—
Vce Saturation (Max)	1.6V @ 50mA, 500mA	—

Substitute Part Grouping Explanation

Substitution of the PMST2222,115 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Transistor Type: NPN
Package / Case: SC-70, SOT-323 (surface mount)
Mounting Type: Surface Mount
Voltage - Collector Emitter Breakdown (Max): 30 V or greater
Current - Collector (Ic) (Max): 600 mA or greater
Power - Max: 200 mW or greater
Operating Temperature Range: Must support 150°C maximum junction temperature

Substitute parts are grouped into two categories based on electrical performance:

Category A - Direct Electrical Equivalents (600 mA, 30-40 V rating): Parts with identical or superior current handling (600 mA), voltage rating (30 V minimum), and power dissipation (200 mW minimum). These parts maintain the same functional capability as the PMST2222,115.

Category B - Reduced Current Equivalents (100 mA, 30 V rating): Parts with lower maximum collector current (100 mA) but identical voltage rating (30 V) and power dissipation (200 mW). These parts are suitable only for applications where collector current does not exceed 100 mA.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce Breakdown (Max) V	Power (Max) mW	Frequency MHz	hFE (Min)	Product Status	Package
PMST2222,115	Nexperia USA Inc.	600	30	200	250	100 @ 150mA, 10V	Active	SOT-323
2DD2656-7	Diodes Incorporated	1000	30	300	270	270 @ 100mA, 2V	Obsolete	SOT-323
BC848AW-7-F	Diodes Incorporated	100	30	200	300	110 @ 2mA, 5V	Active	SOT-323
BC848BW-7-F	Diodes Incorporated	100	30	200	300	200 @ 2mA, 5V	Active	SOT-323
BC848BWT1G	onsemi	100	30	150	100	200 @ 2mA, 5V	Active	SOT-323
BC848CW-7-F	Diodes Incorporated	100	30	200	300	420 @ 2mA, 5V	Active	SOT-323
BC848CWT1G	Fairchild Semiconductor	100	30	150	100	420 @ 2mA, 5V	Active	SOT-323
MMBT2222AWT1G	onsemi	600	40	150	300	100 @ 150mA, 10V	Active	SOT-323
MMST2222A-7-F	Diodes Incorporated	600	40	200	300	100 @ 150mA, 10V	Active	SOT-323
SMMBT2222AWT1G	onsemi	600	40	150	300	100 @ 150mA, 10V	Active	SOT-323

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

MMST2222A-7-F (Diodes Incorporated) and SMMBT2222AWT1G (onsemi) are the preferred direct substitutes. Both parts maintain 600 mA collector current capability, support 40 V breakdown voltage (exceeding the 30 V requirement), and provide 200 mW or greater power dissipation. Both are Active product status with ROHS3 compliance and unlimited moisture sensitivity level. MMST2222A-7-F offers identical 200 mW power rating; SMMBT2222AWT1G provides 150 mW with enhanced frequency performance at 300 MHz.

MMBT2222AWT1G (onsemi) is an alternative direct equivalent with 600 mA capability and 40 V rating. This part is Active status with ROHS3 compliance but operates at 150 mW power dissipation, requiring thermal design verification for applications approaching 200 mW dissipation limits.

Secondary Substitutes (Reduced Current Applications):

BC848CW-7-F (Diodes Incorporated) is suitable for applications where collector current does not exceed 100 mA. This part is Active status, ROHS3 compliant, with 200 mW power rating and 300 MHz transition frequency. The higher DC current gain (420 @ 2mA, 5V) compared to the PMST2222,115 (100 @ 150mA, 10V) reflects different measurement conditions and does not affect substitution validity for reduced-current designs.

BC848BW-7-F (Diodes Incorporated) and BC848AW-7-F (Diodes Incorporated) are additional reduced-current alternatives, both Active status with 200 mW power rating and 300 MHz frequency. These parts differ in DC current gain specifications but maintain identical voltage and package compatibility.

Not Recommended:

2DD2656-7 (Diodes Incorporated) is classified as Obsolete product status and is not recommended for new designs or long-term supply assurance.

BC848BWT1G (onsemi) and BC848CWT1G (Fairchild Semiconductor) operate at reduced power dissipation (150 mW) and lower transition frequency (100 MHz), limiting suitability to applications with relaxed frequency requirements.

Frequently Asked Questions (FAQ)

Q: Can I use BC848CW-7-F as a direct replacement for PMST2222,115?

A: BC848CW-7-F is a functional substitute only for applications where collector current does not exceed 100 mA. The PMST2222,115 is rated for 600 mA maximum collector current. If your circuit requires 600 mA operation, use MMST2222A-7-F or SMMBT2222AWT1G instead.

Q: What is the difference between MMST2222A-7-F and SMMBT2222AWT1G?

A: Both parts support 600 mA collector current and 40 V breakdown voltage. MMST2222A-7-F provides 200 mW power dissipation with 300 MHz transition frequency. SMMBT2222AWT1G provides 150 mW power dissipation with 300 MHz transition frequency. Select MMST2222A-7-F for applications approaching 200 mW dissipation; select SMMBT2222AWT1G when thermal constraints limit dissipation to 150 mW or less.

Q: Are all substitute parts in SOT-323 package?

A: Yes. All substitute parts listed are surface mount devices in SC-70 or SOT-323 package configuration, maintaining mechanical and electrical compatibility with the PMST2222,115 footprint.

Q: Why is 2DD2656-7 listed if it is Obsolete?

A: 2DD2656-7 is included for reference purposes only, documenting historical equivalence relationships. This part is not recommended for new designs due to Obsolete product status and unavailability for long-term supply.

Q: Can I use MMBT2222AWT1G in a 200 mW application?

A: MMBT2222AWT1G is rated for 150 mW maximum power dissipation. Applications requiring sustained 200 mW operation should use MMST2222A-7-F, which is rated for 200 mW. Verify thermal design to ensure junction temperature does not exceed 150°C with MMBT2222AWT1G in power-limited applications.

Q: What does "hFE" mean and why do different parts have different values?

A: hFE is DC current gain, measured at specific collector current and collector-emitter voltage conditions. Different parts have different measurement conditions (for example, PMST2222,115 is measured at 150 mA and 10 V, while BC848CW-7-F is measured at 2 mA and 5 V). These differences reflect device design and measurement methodology, not substitution incompatibility. All listed parts maintain sufficient current gain for switching applications.

Q: Is the PMST2222,115 automotive qualified?

A: Yes. The PMST2222,115 carries AEC-Q101 automotive qualification. MMST2222A-7-F and SMMBT2222AWT1G do not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 compliance, verify qualification status with the manufacturer before substitution.

Q: What is the operating temperature range for substitute parts?

A: The PMST2222,115 operates to 150°C maximum junction temperature. MMST2222A-7-F and SMMBT2222AWT1G support -55°C to 150°C operating range. BC848 series parts support -65°C to 150°C operating range. All parts meet or exceed the PMST2222,115 temperature specification.

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