2N4401RLRA Equivalent & Substitute Parts

Part Overview

The 2N4401RLRA is an NPN bipolar junction transistor manufactured by onsemi, rated for 40V collector-emitter breakdown voltage and 0.6A maximum collector current in a TO-92 package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

2N4401RLRA

onsemiIn Stock: 15202N4401RLRA Datasheet

Current PartRFQ

KSP2222ATA

Fairchild SemiconductorIn Stock: 55246KSP2222ATA Datasheet

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PN2222TA

onsemiIn Stock: 4582PN2222TA Datasheet

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PN2222TF

Fairchild SemiconductorIn Stock: 64925PN2222TF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N4401RLRA is determined by equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration
• Package / Case: TO-92-3 (TO-226AA) formed leads
• Mounting Type: Through Hole
• Current - Collector (Ic) (Max): 0.6 A minimum
• Voltage - Collector Emitter Breakdown (Max): 30 V minimum
• Power - Max: 625 mW minimum
• Frequency - Transition: 300 MHz minimum
• DC Current Gain (hFE) (Min): 100 minimum

The substitute parts listed below meet or exceed these electrical specifications and share identical mechanical packaging, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

KSP2222ATA (Fairchild Semiconductor): This substitute provides the highest voltage rating at 40V collector-emitter breakdown, matching the original 2N4401RLRA specification. The part is in active production status with full current and power specifications. Selection of this part is appropriate for applications requiring the full 40V rating.

PN2222TA (onsemi): This substitute is manufactured by the same original equipment manufacturer as the 2N4401RLRA. The part carries ROHS3 compliance and is classified as Last Time Buy status. The voltage rating is reduced to 30V, which is suitable for applications operating below this threshold.

PN2222TF (Fairchild Semiconductor): This substitute is in active production status with full availability. The voltage rating is 30V, identical to PN2222TA. This part is suitable for applications not requiring the 40V rating of the original component.

For applications requiring the full 40V specification, KSP2222ATA is the appropriate selection. For applications operating at 30V or below, PN2222TA or PN2222TF provide active production alternatives with equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the 2N4401RLRA be directly replaced with KSP2222ATA?

A: Yes. Both parts share identical TO-92-3 package configuration, NPN transistor type, 0.6A maximum collector current, and 40V collector-emitter breakdown voltage. Pin configuration and electrical characteristics are compatible for direct substitution.

Q: What is the voltage difference between KSP2222ATA and PN2222TA?

A: KSP2222ATA is rated for 40V collector-emitter breakdown voltage, while PN2222TA is rated for 30V. Both parts share identical current ratings (0.6A), power dissipation (625mW), and frequency characteristics (300MHz). Selection depends on the maximum voltage requirement of the application circuit.

Q: Are PN2222TA and PN2222TF electrically equivalent?

A: Yes. Both parts are rated for 30V collector-emitter breakdown voltage, 0.6A maximum collector current, 625mW power dissipation, and 300MHz transition frequency. The primary difference is manufacturer: PN2222TA is manufactured by onsemi with ROHS3 compliance, while PN2222TF is manufactured by Fairchild Semiconductor.

Q: What is the package compatibility between the 2N4401RLRA and substitute parts?

A: The 2N4401RLRA uses a TO-92 package. All substitute parts (KSP2222ATA, PN2222TA, PN2222TF) use TO-92-3 (TO-226AA) formed leads packages. These packages are mechanically and electrically compatible for through-hole mounting applications.

Q: Does the obsolete status of 2N4401RLRA affect substitution decisions?

A: Yes. The obsolete status necessitates substitution. KSP2222ATA and PN2222TF are in active production, providing long-term availability. PN2222TA is classified as Last Time Buy, indicating limited future availability. For new designs or long-term production requirements, KSP2222ATA or PN2222TF are preferred selections.

Q: Are there RoHS compliance considerations for substitution?

A: The original 2N4401RLRA is RoHS non-compliant. PN2222TA is ROHS3 compliant. If RoHS compliance is required for the application, PN2222TA is the appropriate selection among the listed substitutes.