Equivalent & Substitute Parts for BF620,115 NPN Bipolar Transistor

Part Overview

The BF620,115 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-89 package. This component operates at a maximum collector voltage of 300 V with a maximum collector current of 50 mA and a power dissipation rating of 1.1 W. The device is qualified to AEC-Q101 automotive standards and maintains active product status. Substitute parts are identified based on electrical parameter compatibility and mechanical packaging equivalence to support design flexibility and supply chain continuity.

Substiute Parts

BF620,115

Nexperia USA Inc.In Stock: 1964BF620,115 Datasheet

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BF720T1G

onsemiIn Stock: 4740BF720T1G Datasheet

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DXTA42-13

Diodes IncorporatedIn Stock: 2352DXTA42-13 Datasheet

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SXTA42TA

Diodes IncorporatedIn Stock: 4295SXTA42TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BF620,115 are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration
• Voltage - Collector Emitter Breakdown (Max): 300 V minimum
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Factors:

• DC Current Gain (hFE) minimum specification
• Vce Saturation characteristics
• Frequency - Transition capability
• Operating temperature range

Substitute parts are grouped into two categories based on current-handling capacity:

Category A - Direct Current Rating Match (50-100 mA): The BF720T1G operates at 100 mA maximum collector current, representing a higher current capability within the same voltage class and package family.

Category B - Enhanced Current Rating (500 mA): The DXTA42-13 and SXTA42TA both operate at 500 mA maximum collector current, providing significantly higher current handling for applications requiring increased collector current capacity while maintaining the 300 V voltage rating and surface mount configuration.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and full ROHS3 compliance with unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the BF620,115.

BF720T1G Selection Criteria: The BF720T1G is suitable for applications requiring increased collector current capacity (100 mA versus 50 mA) while maintaining identical voltage rating (300 V), frequency response (60 MHz), and DC current gain specifications. This substitute accommodates higher current loads without redesign. Package transition from SOT-89 to SOT-223 (TO-261) requires PCB layout modification.

DXTA42-13 and SXTA42TA Selection Criteria: Both DXTA42-13 and SXTA42TA are suitable for applications requiring substantially higher collector current capacity (500 mA) within the same 300 V voltage class. These devices maintain the TO-243AA package footprint, eliminating layout changes. The reduced Vce saturation (500 mV versus 600 mV) and lower transition frequency (50 MHz versus 60 MHz) represent trade-offs in switching performance offset by enhanced current handling. SXTA42TA provides extended operating temperature range (-65°C to 150°C) compared to DXTA42-13 (-55°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can the BF720T1G directly replace the BF620,115 on the same PCB?

A: The BF720T1G maintains electrical compatibility with the BF620,115 across all critical parameters (300 V breakdown voltage, 60 MHz transition frequency, 50 mA minimum current gain). However, the package differs: BF720T1G uses SOT-223 (TO-261) while BF620,115 uses SOT-89 (TO-243AA). PCB footprint and pin layout modifications are required.

Q: What are the key differences between DXTA42-13 and SXTA42TA?

A: Both devices share identical electrical specifications: 300 V breakdown voltage, 500 mA maximum collector current, 50 MHz transition frequency, and TO-243AA package compatibility. The primary difference is operating temperature range: SXTA42TA operates from -65°C to 150°C, while DXTA42-13 operates from -55°C to 150°C. Selection depends on minimum operating temperature requirements.

Q: Are all substitute parts suitable for automotive applications?

A: The BF620,115 carries AEC-Q101 automotive qualification. The substitute parts (BF720T1G, DXTA42-13, SXTA42TA) are listed as active products with ROHS3 compliance and unlimited MSL rating. Automotive qualification status for substitute parts is not provided in the available specifications; verification against specific automotive standards may be required for safety-critical applications.

Q: What is the impact of using DXTA42-13 or SXTA42TA in a circuit designed for BF620,115?

A: Both devices maintain the 300 V voltage rating and TO-243AA package, enabling direct PCB substitution. The 500 mA collector current capability exceeds the BF620,115 specification (50 mA), providing design margin. The reduced Vce saturation (500 mV versus 600 mV) and lower transition frequency (50 MHz versus 60 MHz) may affect switching speed in high-frequency applications but improve saturation performance in switching circuits.

Q: Can the BF620,115 be used in place of DXTA42-13 or SXTA42TA?

A: The BF620,115 is not suitable as a substitute for DXTA42-13 or SXTA42TA in applications requiring 500 mA collector current. The BF620,115 maximum collector current rating is 50 mA, which is insufficient for circuits designed around the higher current capability of the DXTA42-13 or SXTA42TA.

Q: What packaging considerations apply to these substitutes?

A: BF620,115, DXTA42-13, and SXTA42TA all use TO-243AA (SOT-89-3) package, enabling direct PCB substitution without layout modification. BF720T1G uses TO-261-4 (SOT-223) package, requiring PCB footprint redesign. All devices are surface mount with unlimited moisture sensitivity rating (MSL 1).