2N2222 NPN Bipolar Junction Transistor Equivalent & Substitute Parts

Part Overview

The 2N2222 is an NPN bipolar junction transistor manufactured by STMicroelectronics, designed for general-purpose switching and amplification applications. The device features a maximum collector current of 600 mA, collector-emitter breakdown voltage of 30 V, and maximum power dissipation of 500 mW in a Through Hole TO-18 metal can package.

The 2N2222 is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Alternative NPN transistors with compatible electrical and mechanical specifications provide functional equivalence while accommodating current market availability.

Substiute Parts

2N2222

STMicroelectronicsIn Stock: 183422N2222 Datasheet

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2N2222A

Good-Ark SemiconductorIn Stock: 405992N2222A Datasheet

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2N2222AL

Microchip TechnologyIn Stock: 9812N2222AL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N2222 NPN bipolar junction transistor is determined by electrical and mechanical parameter compatibility within the following criteria:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Collector current rating must equal or exceed 600 mA
• Collector-emitter breakdown voltage must equal or exceed 30 V
• DC current gain (hFE) minimum must equal or exceed 100 @ 150mA, 10V
• Maximum power dissipation must equal or exceed 500 mW
• Vce saturation characteristics must be compatible with circuit operation

Mechanical Compatibility Requirements:

• Mounting type must be Through Hole
• Package must be TO-18 or equivalent TO-206AA metal can configuration

Compliance Considerations:

• RoHS3 compliance status
• Moisture sensitivity level MSL 1 (Unlimited)
• REACH unaffected status

The substitute parts identified below meet or exceed these parameters while maintaining functional equivalence in circuit applications designed for the 2N2222.

Parameter Comparison

Engineering Selection Recommendations

2N2222A (Good-Ark Semiconductor)

The 2N2222A provides direct functional substitution for the 2N2222. This part exceeds the original specifications with 800 mA maximum collector current and 40 V collector-emitter breakdown voltage, compared to the 2N2222 ratings of 600 mA and 30 V respectively. The 2N2222A maintains identical DC current gain characteristics and power dissipation limits. Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The 2N2222A is classified as active product status, ensuring continued availability. This part is suitable for direct replacement in applications where the 2N2222 is specified.

2N2222AL (Microchip Technology)

The 2N2222AL offers enhanced electrical performance with 800 mA maximum collector current and 50 V collector-emitter breakdown voltage. The extended operating temperature range of -65°C to 200°C provides broader thermal operating capability compared to the 2N2222 maximum of 175°C. However, the 2N2222AL is classified as RoHS non-compliant, which may restrict its use in applications requiring RoHS3 compliance. The 2N2222AL is classified as active product status. Selection of this part requires confirmation that RoHS non-compliance does not conflict with design or regulatory requirements.

Both substitute parts maintain Through Hole TO-18 metal can packaging, ensuring mechanical compatibility with existing PCB layouts and socket configurations designed for the 2N2222.

Frequently Asked Questions (FAQ)

Q: Can the 2N2222A be used as a direct replacement for the 2N2222?

A: Yes. The 2N2222A meets all electrical and mechanical compatibility requirements. It provides equal or superior performance across all specified parameters, including collector current, breakdown voltage, current gain, and power dissipation. Both parts share identical TO-18 metal can packaging and Through Hole mounting configuration.

Q: What is the primary difference between the 2N2222A and 2N2222AL?

A: The 2N2222A is ROHS3 compliant, while the 2N2222AL is RoHS non-compliant. The 2N2222AL provides an extended operating temperature range of -65°C to 200°C compared to the 2N2222A maximum of 175°C. Both parts offer identical collector current and power dissipation ratings.

Q: Are there any compliance considerations when selecting a substitute?

A: Yes. The 2N2222A maintains ROHS3 compliance matching the original 2N2222. The 2N2222AL is RoHS non-compliant. Applications subject to RoHS3 regulatory requirements must use the 2N2222A. Both substitute parts carry MSL 1 (Unlimited) moisture sensitivity ratings and REACH unaffected status.

Q: Will the substitute parts fit existing PCB layouts designed for the 2N2222?

A: Yes. Both the 2N2222A and 2N2222AL use identical TO-18 metal can packaging with Through Hole mounting configuration. No PCB layout modifications are required for mechanical compatibility.

Q: What is the significance of the higher collector current ratings in the substitute parts?

A: The 2N2222A and 2N2222AL both provide 800 mA maximum collector current compared to the 2N2222 rating of 600 mA. This higher rating provides additional design margin and allows operation at higher current levels without exceeding device limits. Circuits designed for 600 mA operation remain fully compatible.

Q: How do the Vce saturation characteristics compare between parts?

A: The 2N2222 specifies 1.6V maximum Vce saturation at 50mA base current and 500mA collector current. Both substitute parts specify 1V maximum under identical conditions. The lower saturation voltage in substitute parts indicates improved switching performance and reduced power dissipation during saturation.

Q: Is the 2N2222AL suitable for applications requiring extended temperature operation?

A: The 2N2222AL supports operating temperatures from -65°C to 200°C, compared to the 2N2222 maximum of 175°C. However, RoHS non-compliance must be evaluated against application requirements before selection.