2N4402-AP Equivalent & Substitute Parts

Part Overview

The 2N4402-AP is a PNP bipolar junction transistor (BJT) manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 600 mA, collector-emitter breakdown voltage of 40 V, and maximum power dissipation of 625 mW in a Through Hole TO-92 package.

The 2N4402-AP is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

2N4402-AP

Micro Commercial CoIn Stock: 9232N4402-AP Datasheet

Current PartRFQ

2N4403TAR

onsemiIn Stock: 205002N4403TAR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N4402-AP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor polarity: PNP
• Maximum collector current: 600 mA
• Collector-emitter breakdown voltage: 40 V
• Maximum power dissipation: 625 mW
• Saturation voltage characteristics: 750mV @ 50mA, 500mA
• Operating temperature range: -55°C to 150°C

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Package type: TO-92-3 (TO-226AA) with formed leads
• Pin configuration: Compatible with TO-92 footprint

Compliance Criteria:

• RoHS3 compliance required
• ECCN classification: EAR99

The 2N4403TAR manufactured by onsemi meets all specified electrical and mechanical parameters for direct substitution. The substitute part maintains identical maximum ratings for collector current, breakdown voltage, and power dissipation, while offering enhanced DC current gain (100 vs. 50 minimum) and active product status with superior availability.

Parameter Comparison

Engineering Selection Recommendations

The 2N4403TAR from onsemi is a direct electrical and mechanical substitute for the 2N4402-AP. Both devices maintain identical maximum ratings across collector current, breakdown voltage, power dissipation, and saturation voltage characteristics. Both are RoHS3 compliant and classified under ECCN EAR99.

The 2N4403TAR offers the following advantages for component selection:

Product Status: The 2N4403TAR maintains active product status with established supply chain availability (20,400 units in stock), whereas the 2N4402-AP is obsolete with limited inventory (845 units).

Performance Enhancement: The 2N4403TAR provides a minimum DC current gain of 100 at the specified operating point, compared to 50 for the 2N4402-AP. This enhanced gain characteristic does not compromise circuit compatibility and may improve switching performance in existing designs.

Compliance Certification: Both devices maintain ROHS3 compliance and EAR99 classification, ensuring regulatory alignment for applications requiring environmental and export compliance.

Packaging and Footprint: Identical TO-92-3 package configuration with formed leads ensures direct mechanical compatibility without PCB redesign or rework.

Frequently Asked Questions (FAQ)

Q: Can the 2N4403TAR directly replace the 2N4402-AP in existing circuits?

A: Yes. The 2N4403TAR meets all electrical and mechanical specifications of the 2N4402-AP. Maximum ratings for collector current (600 mA), breakdown voltage (40 V), power dissipation (625 mW), and saturation voltage are identical. The TO-92-3 package footprint is mechanically compatible without modification.

Q: What is the difference in DC current gain between these devices?

A: The 2N4402-AP specifies a minimum DC current gain (hFE) of 50 at 150 mA collector current and 2 V collector-emitter voltage. The 2N4403TAR specifies a minimum hFE of 100 at the same operating point. The higher gain of the substitute part does not create incompatibility; circuits designed for the lower gain will operate within specification with the higher-gain device.

Q: Are there package or pinout differences?

A: No. Both devices use the TO-92-3 package (TO-226AA) with formed leads. Pin configuration and mechanical dimensions are identical, enabling direct PCB substitution without layout changes.

Q: What is the significance of the 200 MHz transition frequency specified for the 2N4403TAR?

A: The 2N4403TAR specifies a transition frequency (fT) of 200 MHz, whereas the 2N4402-AP does not provide this specification. This parameter indicates the frequency at which the current gain drops to unity. The specified transition frequency of the substitute part does not degrade performance in applications designed for the original part and may provide improved high-frequency response.

Q: Are both devices RoHS compliant?

A: Yes. Both the 2N4402-AP and 2N4403TAR are ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.

Q: Why is the 2N4402-AP listed as obsolete?

A: The 2N4402-AP is classified as obsolete by the manufacturer, indicating discontinued production. The 2N4403TAR is an active product with ongoing manufacturing support and supply chain availability, making it the preferred selection for new designs and ongoing production requirements.

Q: What is the operating temperature range for both devices?

A: Both devices operate across an identical temperature range of -55°C to 150°C (junction temperature). This specification ensures compatibility across industrial, commercial, and extended-temperature applications.