BD1386STU Equivalent & Substitute Parts

Part Overview

The BD1386STU is an obsolete PNP bipolar junction transistor manufactured by onsemi, rated for 60 V collector-emitter breakdown voltage and 1.5 A maximum collector current in a Through Hole TO-126-3 package. The device delivers 1.25 W maximum power dissipation and operates at junction temperatures up to 150°C. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

BD1386STU

onsemiIn Stock: 955BD1386STU Datasheet

Current PartRFQ

BD138G

onsemiIn Stock: 3681BD138G Datasheet

DirectRFQ

2N4919G

onsemiIn Stock: 15602N4919G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BD1386STU is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor Type: PNP configuration required
• Voltage - Collector Emitter Breakdown (Max): Minimum 60 V
• Current - Collector (Ic) (Max): Minimum 1.5 A
• Power - Max: Minimum 1.25 W
• Vce Saturation: Compatible saturation voltage at specified base and collector currents
• DC Current Gain (hFE): Minimum 40 at specified operating point

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: TO-126-3 or equivalent TO-225AA footprint

Substitute Classification:

Direct Equivalent (BD138G): Maintains identical electrical specifications (1.5 A, 60 V, 1.25 W) with active product status and full RoHS3 compliance. Functionally interchangeable with identical performance envelope.

Similar Substitute (2N4919G): Shares 60 V breakdown voltage and Through Hole TO-126 package but operates at reduced maximum collector current (1 A versus 1.5 A) and increased power dissipation (30 W versus 1.25 W). Suitable for applications where collector current does not exceed 1 A. Product status is Last Time Buy.

Parameter Comparison

Engineering Selection Recommendations

BD138G (Direct Equivalent - Recommended Primary Choice)

The BD138G is the preferred substitute for the obsolete BD1386STU. This part maintains identical electrical specifications across all critical parameters: 60 V breakdown voltage, 1.5 A maximum collector current, 1.25 W power dissipation, and matching saturation voltage characteristics. The BD138G carries Active product status with 3600 units in stock, ensuring long-term availability. Full RoHS3 compliance and REACH Unaffected status satisfy modern regulatory requirements. The part is functionally interchangeable with no circuit redesign required.

2N4919G (Similar Substitute - Conditional Use)

The 2N4919G is suitable as a substitute only in applications where the maximum collector current requirement does not exceed 1 A. While this part shares the 60 V breakdown voltage and Through Hole TO-126 package, the reduced current rating (1 A versus 1.5 A) and higher collector cutoff current (500µA versus 100nA) represent significant electrical differences. The 2N4919G carries Last Time Buy status, indicating limited future availability. Use this part only when circuit design permits operation within its 1 A current envelope and when BD138G is unavailable.

Frequently Asked Questions (FAQ)

Q: Can BD138G be used as a direct replacement for BD1386STU without circuit modification?

A: Yes. The BD138G maintains identical electrical specifications for voltage, current, power, and saturation characteristics. No circuit redesign is required. The part is mechanically compatible with the same Through Hole TO-126-3 package footprint.

Q: What is the primary difference between BD138G and 2N4919G?

A: The BD138G supports 1.5 A maximum collector current, while the 2N4919G is rated for 1 A maximum. Both share 60 V breakdown voltage and Through Hole packaging. The 2N4919G exhibits higher collector cutoff current (500µA versus 100nA) and different saturation voltage characteristics. Selection depends on circuit current requirements.

Q: Why is BD1386STU obsolete while BD138G remains active?

A: BD138G is the current production equivalent of the BD1386STU base product (BD138). The BD1386STU designation represents an earlier packaging or manufacturing variant that has been superseded. BD138G provides the same electrical performance with modern manufacturing and compliance certifications.

Q: Are there compliance or regulatory differences between these parts?

A: BD138G and 2N4919G both carry RoHS3 compliance and REACH Unaffected status. The BD1386STU compliance status is not specified in available documentation. For applications requiring documented RoHS3 compliance, BD138G is the appropriate choice.

Q: What is the inventory status for each substitute?

A: BD138G has 3600 units in stock (Active status). 2N4919G has 1478 units in stock (Last Time Buy status). BD1386STU has 901 units in stock but is Obsolete. For long-term supply assurance, BD138G is the recommended selection.

Q: Can 2N4919G be used in all applications designed for BD1386STU?

A: No. The 2N4919G is suitable only for applications where collector current remains below 1 A. Applications requiring the full 1.5 A rating must use BD138G. Additionally, the different saturation voltage and collector cutoff current may affect circuit performance in precision applications.

Q: Are the packages physically identical?

A: Both substitute parts use the same Through Hole TO-126-3 package designation as the BD1386STU. Physical footprint compatibility is confirmed. Verify PCB layout accommodates the specific package variant (TO-126 versus TO-126-3) if board redesign is not permitted.