2SA2039-H Equivalent & Substitute Parts

Part Overview

The 2SA2039-H is an obsolete PNP bipolar junction transistor manufactured by onsemi, rated for 50 V collector-emitter breakdown voltage and 5 A maximum collector current. This device is designed for through-hole mounting in the TO-251-3 (IPak) package configuration. Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing design support, maintenance, and production continuity. The 2SA2039-H remains available in limited inventory (1087 pcs), but alternative active or recently obsolete parts provide extended availability and performance options.

Substiute Parts

2SA2039-H

onsemiIn Stock: 11802SA2039-H Datasheet

Current PartRFQ

2SB1203T-E

onsemiIn Stock: 10802SB1203T-E Datasheet

DirectRFQ

2SA2039-E

onsemiIn Stock: 81112SA2039-E Datasheet

SimilarRFQ

2SA2040-E

onsemiIn Stock: 40002SA2040-E Datasheet

SimilarRFQ

2SB1204T-E

onsemiIn Stock: 8862SB1204T-E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA2039-H is determined by strict electrical and mechanical compatibility across the following critical parameters:

Mandatory Matching Parameters:

• Transistor Type: PNP
• Voltage - Collector Emitter Breakdown (Max): 50 V
• Current - Collector (Ic) Max: 5 A (minimum requirement)
• Mounting Type: Through Hole
• Package / Case: TO-251-3 Short Leads, IPak, TO-251AA
• DC Current Gain (hFE) Min @ Ic, Vce: 200 @ 500 mA, 2 V

Allowable Parameter Variations:

• Vce Saturation: May vary within acceptable operating margins
• Power - Max: May be equal or greater than 800 mW
• Frequency - Transition: May be lower than 360 MHz for non-frequency-critical applications
• Current - Collector Cutoff (Max): May vary within specified limits
• Product Status: Active or Obsolete parts qualify as substitutes

Substitute parts are grouped into two categories: direct equivalents (identical electrical specifications with different packaging or product status) and compatible alternatives (higher current ratings or power dissipation that maintain voltage and gain specifications).

Parameter Comparison

Engineering Selection Recommendations

2SA2039-E (Direct Equivalent) The 2SA2039-E is a direct electrical equivalent to the 2SA2039-H with identical specifications across all critical parameters: 5 A collector current, 50 V breakdown voltage, 360 MHz transition frequency, and 800 mW power rating. Both parts are obsolete and ROHS3 compliant. The 2SA2039-E is available in bulk packaging with significantly higher inventory (8010 pcs) compared to the 2SA2039-H (1087 pcs), providing extended supply availability. This part is the preferred direct replacement when packaging format is not a constraint.

2SB1203T-E (Active Substitute) The 2SB1203T-E is an active product offering equivalent electrical performance for 5 A applications at 50 V. It maintains the same DC current gain specification (200 @ 500 mA, 2 V) and collector current rating. The transition frequency is reduced to 130 MHz (compared to 360 MHz in the 2SA2039-H), and power dissipation is increased to 1 W. This part is suitable for applications where frequency response below 130 MHz is acceptable and where active product status is required for long-term supply assurance. Inventory availability is 1069 pcs.

2SA2040-E (Higher Current Alternative) The 2SA2040-E provides an upgrade path for designs requiring higher current capacity. It supports 8 A collector current while maintaining the 50 V breakdown voltage and 200 @ 500 mA, 2 V DC current gain. The transition frequency is 330 MHz, and power rating is 1 W. This part is obsolete but suitable for applications where the 2SA2039-H current rating is marginal and additional headroom is beneficial. Inventory is 3950 pcs.

2SB1204T-E (Higher Current, Obsolete) The 2SB1204T-E is an obsolete part supporting 8 A collector current at 50 V with identical DC current gain specifications. Transition frequency is reduced to 130 MHz, and power rating is 1 W. This part is suitable only for non-frequency-critical applications requiring higher current capacity. Inventory is limited at 797 pcs.

Compliance and Certification: All substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance profile of the 2SA2039-H. Moisture sensitivity level is 1 (Unlimited) for all parts, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the 2SA2039-E be used as a direct replacement for the 2SA2039-H? A: Yes. The 2SA2039-E is electrically identical to the 2SA2039-H across all critical parameters: 5 A collector current, 50 V breakdown voltage, 360 MHz transition frequency, 800 mW power rating, and 200 @ 500 mA, 2 V DC current gain. Both are mounted in the TO-251-3 (IPak) through-hole package. The primary difference is packaging format (bulk vs. standard) and higher inventory availability of the 2SA2039-E.

Q: Is the 2SB1203T-E suitable for high-frequency applications? A: The 2SB1203T-E has a transition frequency of 130 MHz, compared to 360 MHz for the 2SA2039-H. It is suitable for applications operating below 130 MHz. For applications requiring the full 360 MHz bandwidth of the 2SA2039-H, the 2SB1203T-E is not appropriate.

Q: What is the advantage of using the 2SB1203T-E over the 2SA2039-E? A: The 2SB1203T-E is an active product with ongoing manufacturing and supply support, whereas the 2SA2039-E is obsolete. For new designs or long-term production requirements, the 2SB1203T-E provides supply chain continuity. Both parts support 5 A collector current and 50 V breakdown voltage. The 2SB1203T-E has reduced transition frequency (130 MHz vs. 360 MHz) and increased power rating (1 W vs. 800 mW).

Q: Can the 2SA2040-E or 2SB1204T-E be used in place of the 2SA2039-H? A: Yes, with design verification. Both parts support 8 A collector current, which exceeds the 5 A rating of the 2SA2039-H. They maintain the 50 V breakdown voltage and 200 @ 500 mA, 2 V DC current gain. The 2SA2040-E has 330 MHz transition frequency (suitable for high-frequency applications), while the 2SB1204T-E has 130 MHz (suitable for lower-frequency applications). These parts are suitable when additional current margin is beneficial.

Q: Are all substitute parts in the same package? A: Yes. All substitute parts (2SA2039-E, 2SB1203T-E, 2SA2040-E, and 2SB1204T-E) use the TO-251-3 Short Leads (IPak, TO-251AA) through-hole package, identical to the 2SA2039-H. Direct mechanical and electrical compatibility is maintained.

Q: What is the difference between Vce saturation specifications across these parts? A: Vce saturation varies based on measurement conditions (base current and collector current). The 2SA2039-H specifies 430 mV @ 100 mA, 2 A. The 2SB1203T-E specifies 550 mV @ 150 mA, 3 A, and the 2SA2040-E specifies 400 mV @ 40 mA, 2 A. These variations reflect different transistor designs and measurement points. For applications sensitive to saturation voltage, verify the specific measurement conditions match your operating point.

Q: Are all parts RoHS3 compliant? A: Yes. All substitute parts listed (2SA2039-E, 2SB1203T-E, 2SA2040-E, and 2SB1204T-E) are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the 2SA2039-H.

Q: Which substitute part has the best inventory availability? A: The 2SA2039-E has the highest inventory at 8010 pcs. The 2SA2040-E has 3950 pcs, the 2SB1203T-E has 1069 pcs, and the 2SB1204T-E has 797 pcs. The 2SA2039-H has 1087 pcs.