2N5039 Equivalent & Substitute Parts

Part Overview

The 2N5039 is an NPN silicon bipolar junction transistor (BJT) designed for high-current switching and amplification applications. Manufactured by Central Semiconductor Corp, this through-hole component operates at collector currents up to 20 A and collector-emitter voltages up to 75 V, with a maximum power dissipation of 140 W. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Active alternatives from current manufacturers provide direct functional replacement while maintaining electrical and mechanical compatibility.

Substiute Parts

2N5039

Central Semiconductor CorpIn Stock: 8602N5039 Datasheet

Current PartRFQ

2N5039

Microchip TechnologyIn Stock: 8822N5039 Datasheet

DirectRFQ

2N5038G

onsemiIn Stock: 13642N5038G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2N5039 is determined by the following critical parameters:

Primary Electrical Criteria:

• Transistor type: NPN
• Maximum collector current: 20 A (minimum requirement)
• Collector-emitter breakdown voltage: 75 V or greater
• Maximum power dissipation: 140 W (minimum requirement)
• Vce saturation: 2.5 V @ 5A, 20A (maximum allowable)
• DC current gain (hFE): 30 @ 2A, 5V (minimum)
• Operating temperature range: -65°C to 200°C (minimum requirement)

Mechanical Criteria:

• Mounting type: Through Hole
• Package: TO-204AA or TO-3 equivalent

Substitute parts must meet or exceed all primary electrical criteria and maintain mechanical compatibility. Parts that exceed the specified voltage or current ratings remain valid substitutes provided they maintain the same package form factor and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

2N5039 (Microchip Technology): This part is an exact electrical equivalent to the original Central Semiconductor 2N5039, maintaining identical ratings across all critical parameters including collector current, breakdown voltage, saturation voltage, and current gain specifications. The part carries Active product status, ensuring ongoing availability and supply chain continuity. RoHS non-compliance status should be evaluated against application requirements. This substitute provides direct pin-for-pin and functional replacement without design modification.

2N5038G (onsemi): This part exceeds the original 2N5039 specifications in collector-emitter breakdown voltage (90 V versus 75 V), providing enhanced voltage margin in applications operating near the maximum rating. The part maintains identical maximum collector current (20 A), power dissipation (140 W), and saturation voltage characteristics. The DC current gain specification differs (20 @ 12A, 5V versus 30 @ 2A, 5V), reflecting measurement at different operating points; both values satisfy minimum gain requirements for typical switching applications. The 2N5038G carries Active product status and ROHS3 compliance certification, supporting modern manufacturing and environmental standards. This substitute is suitable for applications where enhanced voltage headroom is beneficial or where RoHS compliance is mandated.

Frequently Asked Questions (FAQ)

Q: Can the 2N5039 (Microchip Technology) be used as a direct replacement for the obsolete Central Semiconductor 2N5039?

A: Yes. The Microchip Technology 2N5039 maintains identical electrical specifications across all critical parameters: 20 A maximum collector current, 75 V breakdown voltage, 2.5 V saturation voltage at rated current, 30 minimum DC current gain, and 140 W power dissipation. The part uses the same TO-3 package and through-hole mounting configuration. No circuit modifications are required.

Q: What is the primary difference between the 2N5039 and 2N5038G?

A: The 2N5038G provides a higher collector-emitter breakdown voltage rating of 90 V compared to the 2N5039's 75 V. All other electrical parameters—maximum collector current, saturation voltage, power dissipation, and operating temperature range—remain identical. The 2N5038G also offers ROHS3 compliance and active product status.

Q: Is the 2N5038G suitable for circuits designed for the 2N5039?

A: Yes. The 2N5038G meets or exceeds all electrical requirements of the 2N5039. The higher breakdown voltage provides additional safety margin and does not degrade performance in applications designed for 75 V operation. Pin configuration and package form factor are identical.

Q: What packaging options are available for these substitutes?

A: All three parts—2N5039 (Central Semiconductor), 2N5039 (Microchip Technology), and 2N5038G (onsemi)—use TO-204AA or TO-3 through-hole packages. Packaging format differences (Bulk, Tray) reflect supplier inventory management and do not affect electrical or mechanical compatibility.

Q: Are there compliance or certification differences between the substitute options?

A: The 2N5039 (Microchip Technology) is RoHS non-compliant. The 2N5038G (onsemi) is ROHS3 compliant. Both parts are REACH unaffected and carry EAR99 ECCN classification. Application requirements for environmental compliance should guide selection between these options.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: The 2N5039 (Central Semiconductor and Microchip Technology) specify 60 MHz transition frequency. The 2N5038G does not provide transition frequency specification in the available data. For applications requiring confirmed high-frequency performance, the 2N5039 variants are the specified choice. The 2N5038G is suitable for standard switching applications within the specified operating temperature and power ranges.