AS3PJ-M3/86A Equivalent & Substitute Parts

Part Overview

The AS3PJ-M3/86A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 600V DC reverse voltage with 2.1A average rectified current. This component operates in the eSMP® series and is classified as an active product with ROHS3 compliance. The device is packaged in TO-277A (SMPC) surface mount configuration and is suitable for applications requiring avalanche protection and standard recovery characteristics.

Equivalent and substitute parts are identified to provide design flexibility when the primary part number is unavailable, when alternative packaging configurations are preferred, or when supply chain optimization is required while maintaining functional compatibility within specified electrical parameters.

Substiute Parts

AS3PJ-M3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1032AS3PJ-M3/86A Datasheet

Current PartRFQ

STTH3R06U

STMicroelectronicsIn Stock: 10135STTH3R06U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AS3PJ-M3/86A is determined by the following critical electrical and mechanical parameters:

Voltage Compatibility: The substitute part must maintain a DC reverse voltage rating of 600V or higher to ensure equivalent reverse bias protection.

Current Rating: The substitute part must support an average rectified current of 2.1A or greater to handle the intended load without thermal stress or performance degradation.

Forward Voltage Characteristics: Forward voltage drop must be compatible with circuit design requirements, particularly at the specified test current conditions.

Recovery Characteristics: Recovery speed classification (standard or fast recovery) and reverse recovery time affect switching performance and must be evaluated for application-specific requirements.

Reverse Leakage Current: Leakage specifications must not exceed the original part's characteristics to maintain circuit performance and power efficiency.

Package and Mounting: Surface mount configuration and thermal characteristics of the package must support the application's PCB layout and thermal management requirements.

Compliance and Certifications: RoHS3 compliance, REACH status, and moisture sensitivity level must match or exceed the original part specifications.

The STTH3R06U from STMicroelectronics meets these substitution criteria with equivalent voltage rating, higher current capacity, and compatible surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

Voltage and Current Ratings: Both the AS3PJ-M3/86A and STTH3R06U are rated for 600V DC reverse voltage. The STTH3R06U provides higher average rectified current capacity at 3A compared to the 2.1A rating of the AS3PJ-M3/86A, making it suitable for applications requiring additional current margin.

Recovery Characteristics: The AS3PJ-M3/86A operates as a standard recovery diode with 1.2µs reverse recovery time, while the STTH3R06U is classified as fast recovery with 35ns reverse recovery time. Fast recovery characteristics reduce switching losses and are compatible with higher frequency switching applications.

Reverse Leakage: The STTH3R06U exhibits lower reverse leakage current (3µA) compared to the AS3PJ-M3/86A (10µA), resulting in improved power efficiency and reduced standby current consumption.

Compliance Status: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity level, ensuring equivalent environmental and regulatory compliance.

Package Considerations: The AS3PJ-M3/86A uses TO-277A (SMPC) packaging, while the STTH3R06U uses SMB (DO-214AA) packaging. PCB layout modifications may be required due to different footprint geometries and thermal characteristics.

Product Status: Both parts are classified as active products with current manufacturing support and availability.

Frequently Asked Questions (FAQ)

Q: Can the STTH3R06U directly replace the AS3PJ-M3/86A in all applications?

A: The STTH3R06U meets the critical electrical parameters (600V rating, 2.1A minimum current requirement) and compliance standards. However, PCB layout modifications are necessary due to different package geometries (TO-277A versus SMB). Thermal management characteristics may differ between packages and should be evaluated for the specific application.

Q: What is the significance of the difference in reverse recovery time between these parts?

A: The AS3PJ-M3/86A has a reverse recovery time of 1.2µs (standard recovery), while the STTH3R06U has 35ns (fast recovery). Fast recovery reduces switching losses and is advantageous in high-frequency applications. Standard recovery is suitable for lower frequency rectification circuits. Application frequency requirements determine which characteristic is appropriate.

Q: Why does the STTH3R06U have higher forward voltage drop?

A: The STTH3R06U forward voltage specification is measured at 3A (1.7V @ 3A), while the AS3PJ-M3/86A specification is at 1.5A (920mV @ 1.5A). Forward voltage increases with current. At equivalent current levels, the actual voltage drop comparison would differ from the specified values. Circuit design must account for the specified operating current conditions.

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

A: Both parts maintain identical compliance status: ROHS3 compliant, REACH unaffected, and MSL 1 (unlimited). No regulatory or environmental compliance differences exist between the two parts.

Q: What packaging considerations should be evaluated for substitution?

A: The AS3PJ-M3/86A uses TO-277A (SMPC) surface mount packaging, while the STTH3R06U uses SMB (DO-214AA) surface mount packaging. Different footprints require PCB redesign. Thermal dissipation characteristics may vary between package types and should be verified for the application's thermal requirements.

Q: Is the higher current rating of the STTH3R06U (3A vs 2.1A) a disadvantage?

A: Higher current rating provides additional design margin and does not create a disadvantage. The part can operate at lower current levels without performance degradation. This characteristic allows flexibility for applications with varying current requirements or future design modifications.

Q: What is the impact of lower reverse leakage current in the STTH3R06U?

A: Lower reverse leakage current (3µA versus 10µA) reduces standby power consumption and improves overall circuit efficiency. This characteristic is beneficial in battery-powered applications and circuits requiring minimal quiescent current.