BST16TA Equivalent & Substitute Parts

Part Overview

The BST16TA is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-89-3 package. This component operates at a maximum collector voltage of 300 V with a collector current rating of 500 mA and a maximum power dissipation of 1 W. The BST16TA is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity. Equivalent parts must maintain functional compatibility across critical electrical parameters including voltage ratings, current handling capacity, and thermal characteristics.

Substiute Parts

BST16TA

Diodes IncorporatedIn Stock: 745BST16TA Datasheet

Current PartRFQ

FCX558TA

Diodes IncorporatedIn Stock: 10166FCX558TA Datasheet

MFR RecommendedRFQ

CXTA92 TR PBFREE

Central Semiconductor CorpIn Stock: 10587CXTA92 TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BST16TA is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor polarity must remain PNP
• Collector-emitter breakdown voltage must equal or exceed 300 V
• Maximum collector current must equal or exceed 500 mA
• Maximum power dissipation must equal or exceed 1 W
• Package type must be TO-243AA (SOT-89-3 or SOT-89 variant)
• Surface mount configuration required
• Operating temperature range must encompass -65°C to 150°C

Secondary Compatibility Factors:

• RoHS3 compliance required
• Moisture sensitivity level MSL 1 (Unlimited)
• REACH unaffected status

The substitute parts identified below satisfy these criteria with the following considerations:

FCX558TA exceeds the voltage rating (400 V vs. 300 V) and maintains the collector current specification at 500 mA maximum, though the active product status and higher transition frequency (50 MHz vs. 15 MHz) provide enhanced performance characteristics.

CXTA92 TR PBFREE matches the voltage rating (300 V) and collector current (500 mA) exactly, with increased power dissipation capability (1.2 W vs. 1 W) and active product status, providing direct functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

CXTA92 TR PBFREE is the primary substitute for the obsolete BST16TA. This part maintains identical voltage and current ratings (300 V, 500 mA) with enhanced power dissipation (1.2 W), active product status ensuring long-term availability, and full compliance with RoHS3 and REACH requirements. The CXTA92 TR PBFREE is supplied in Tape & Reel packaging with 10,533 pieces in stock, supporting production continuity.

FCX558TA serves as an alternative substitute when higher voltage margin is required. This Diodes Incorporated component provides 400 V breakdown voltage and maintains 500 mA collector current capability with 1 W power dissipation. The FCX558TA is active and widely available (10,100 pieces in stock) with identical RoHS3 and REACH compliance. The elevated transition frequency (50 MHz) and improved saturation characteristics provide performance enhancement over the original BST16TA specification.

Both substitute parts are surface mount devices in compatible TO-243AA package variants, operate across the full -65°C to 150°C temperature range, and maintain MSL 1 moisture sensitivity classification. Selection between these substitutes depends on application-specific requirements for voltage headroom and frequency response characteristics.

Frequently Asked Questions (FAQ)

Q: Can the FCX558TA be used as a direct replacement for the BST16TA in all applications?

A: The FCX558TA is electrically compatible with the BST16TA for applications requiring 300 V operation. The FCX558TA provides 400 V breakdown voltage, exceeding the BST16TA specification. However, the FCX558TA maximum collector current is 200 mA, which is lower than the BST16TA rating of 500 mA. Applications requiring the full 500 mA collector current must use the CXTA92 TR PBFREE instead.

Q: What is the difference between SOT-89-3 and SOT-89 packaging?

A: Both designations refer to the same three-terminal surface mount package (TO-243AA). The BST16TA uses SOT-89-3 designation while the CXTA92 TR PBFREE uses SOT-89 designation. These are functionally equivalent package types with identical pin configurations and footprints suitable for direct PCB substitution.

Q: Are the CXTA92 TR PBFREE and FCX558TA pin-compatible with the BST16TA?

A: Yes. All three parts use the TO-243AA (SOT-89) package with identical three-pin configurations: Base, Collector, and Emitter. Direct PCB footprint compatibility is confirmed.

Q: Why is the BST16TA classified as obsolete?

A: The BST16TA is no longer manufactured by Diodes Incorporated. The CXTA92 TR PBFREE and FCX558TA are active products that provide equivalent or enhanced functionality for new designs and production support of existing applications.

Q: What are the key electrical differences between the substitute parts?

A: The CXTA92 TR PBFREE matches the BST16TA voltage rating (300 V) and collector current (500 mA) with increased power dissipation (1.2 W). The FCX558TA provides higher voltage rating (400 V) but reduced collector current (200 mA). Both substitutes feature improved transition frequency (50 MHz vs. 15 MHz) and lower collector cutoff current compared to the original part.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both the CXTA92 TR PBFREE and FCX558TA are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the inventory status of the substitute parts?

A: The CXTA92 TR PBFREE has 10,533 pieces in stock supplied in Tape & Reel packaging. The FCX558TA has 10,100 pieces in stock supplied in Cut Tape and Digi-Reel packaging. Both parts are available for immediate procurement.