2SA1576ART1G Equivalent & Substitute Parts

Part Overview

The 2SA1576ART1G is a PNP bipolar junction transistor manufactured by onsemi, housed in a surface mount SC-70 (SOT-323) package. This component is rated for 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 200 mW power dissipation. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production support.

Substiute Parts

2SA1576ART1G

onsemiIn Stock: 7552SA1576ART1G Datasheet

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2SA1576AT106R

Rohm SemiconductorIn Stock: 4172152SA1576AT106R Datasheet

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BC857AW-G

Comchip TechnologyIn Stock: 1111BC857AW-G Datasheet

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BC857BW-G

Comchip TechnologyIn Stock: 943BC857BW-G Datasheet

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BC857CW,115

Nexperia USA Inc.In Stock: 77929BC857CW,115 Datasheet

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BC857CW-G

Comchip TechnologyIn Stock: 1214BC857CW-G Datasheet

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BC857W,115

Nexperia USA Inc.In Stock: 19226BC857W,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA1576ART1G is determined by the following critical parameters:

Mandatory Matching Criteria:

• Transistor Type: PNP
• Package / Case: SC-70 or SOT-323 (surface mount)
• Mounting Type: Surface Mount

Electrical Compatibility Criteria:

• Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 50 V
• Current - Collector (Ic) (Max): Must equal or exceed 100 mA
• Power - Max: Must equal or exceed 200 mW

Substitute parts are grouped into two categories based on voltage rating:

Category A - Full Voltage Compatibility (50 V rated): Parts rated at 50 V collector-emitter breakdown voltage provide direct electrical substitution with no derating required.

Category B - Reduced Voltage Compatibility (45 V rated): Parts rated at 45 V collector-emitter breakdown voltage operate within acceptable parameters for applications where the 50 V rating is not a critical design constraint. These parts maintain identical package form factor and current handling capability.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring 50 V rated components:

The 2SA1576AT106R from Rohm Semiconductor provides full electrical compatibility with the 2SA1576ART1G. This part maintains the 50 V collector-emitter breakdown voltage rating while offering increased collector current capability (150 mA versus 100 mA). The device is classified as "Not For New Designs," indicating limited long-term availability. This part is suitable for legacy system support and production continuity where voltage rating is a critical design parameter.

For applications compatible with 45 V rated components:

The BC857 series from Nexperia USA Inc. and Comchip Technology provides active, production-qualified alternatives. BC857CW,115 and BC857W,115 from Nexperia are AEC-Q101 qualified automotive-grade devices with active product status, offering the highest reliability assurance for new designs. Both parts maintain 100 mA collector current and 200 mW power dissipation ratings. Comchip Technology variants (BC857AW-G, BC857BW-G, BC857CW-G) are also active but rated at 150 mW power dissipation.

Compliance and Certification:

BC857CW,115 and BC857W,115 carry AEC-Q101 automotive qualification and are suitable for automotive and industrial applications. All substitute parts listed are RoHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can BC857 series parts directly replace the 2SA1576ART1G?

A: BC857 series parts are electrically compatible for applications where the 45 V collector-emitter breakdown voltage is acceptable. All parts share identical SC-70 (SOT-323) package geometry and 100 mA collector current rating. Voltage derating must be evaluated against circuit requirements.

Q: What is the difference between BC857AW-G, BC857BW-G, and BC857CW-G?

A: These parts differ in DC current gain (hFE) specifications. BC857AW-G specifies minimum hFE of 125 @ 2mA, 5V. BC857BW-G specifies minimum hFE of 220 @ 2.2mA, 5V. BC857CW-G specifies minimum hFE of 420 @ 2mA, 5V. All three maintain identical voltage and current ratings.

Q: Why is the 2SA1576AT106R classified as "Not For New Designs"?

A: This classification indicates the manufacturer has discontinued active promotion and development of this part. While functionally suitable, long-term availability cannot be guaranteed. For new designs, active-status alternatives such as BC857CW,115 or BC857W,115 are recommended.

Q: Are there differences in saturation voltage between substitute parts?

A: Yes. The 2SA1576ART1G specifies 500mV saturation voltage @ 10mA, 100mA. BC857 series parts specify 600mV saturation voltage @ 5mA, 100mA. This difference must be evaluated in switching applications where saturation voltage affects circuit performance.

Q: What is the significance of AEC-Q101 qualification on BC857CW,115 and BC857W,115?

A: AEC-Q101 qualification indicates these parts meet automotive industry reliability and quality standards. These devices are suitable for automotive, industrial, and mission-critical applications requiring documented quality assurance.

Q: Can I use BC857 parts in applications originally designed for 50 V operation?

A: BC857 parts are rated at 45 V collector-emitter breakdown voltage. Use in 50 V applications requires circuit analysis to confirm that maximum voltages do not exceed 45 V under all operating conditions, including transient events.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in SC-70 (SOT-323) surface mount package. Packaging options vary by manufacturer: Nexperia offers Cut Tape (CT) & Digi-Reel packaging; Comchip Technology offers Tape & Reel (TR); Rohm Semiconductor offers Cut Tape (CT) & Digi-Reel packaging.