Equivalent & Substitute Parts for AS4PD-M3/87A

Part Overview

The AS4PD-M3/87A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200V DC reverse voltage and 2.4A average rectified current in a surface mount TO-277A package. This component is part of the eSMP® series and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

AS4PD-M3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1013AS4PD-M3/87A Datasheet

Current PartRFQ

AS4PD-M3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 4368AS4PD-M3/86A Datasheet

Parametric EquivalentRFQ

STTH4R02S

STMicroelectronicsIn Stock: 17612STTH4R02S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS4PD-M3/87A are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent Classification: Parts that maintain identical or equivalent electrical specifications across all critical parameters including reverse voltage rating, average rectified current, forward voltage characteristics, recovery time, leakage current, and capacitance. These parts are direct functional replacements with matching package specifications.

Manufacturer Recommended Classification: Parts that meet the primary voltage and current requirements but may differ in secondary characteristics such as recovery speed, leakage current, or package form factor. These parts satisfy the core application requirements while offering alternative performance profiles.

The critical parameters determining substitution eligibility are:

• Voltage - DC Reverse (Vr) (Max): 200V minimum
• Current - Average Rectified (Io): 2.4A minimum
• Package compatibility: Surface mount configuration
• Mounting Type: Surface mount
• RoHS3 Compliance: Required

Parameter Comparison

Engineering Selection Recommendations

AS4PD-M3/86A Selection: This part is a parametric equivalent to the AS4PD-M3/87A with identical electrical specifications and package configuration. Both components are manufactured by Vishay General Semiconductor - Diodes Division within the eSMP® series. Selection of AS4PD-M3/86A is appropriate when the primary AS4PD-M3/87A is unavailable, as it provides equivalent performance across all measured parameters. Both parts maintain active product status and full RoHS3 compliance. The AS4PD-M3/86A offers higher inventory availability (4300 pcs vs. 998 pcs).

STTH4R02S Selection: This part is a manufacturer-recommended alternative manufactured by STMicroelectronics. The STTH4R02S meets the minimum voltage and current requirements (200V, 4A) and maintains RoHS3 compliance. Key differences include faster recovery time (30 ns vs. 1.8 µs), lower reverse leakage current (3 µA vs. 10 µA), and a different package form factor (DO-214AB SMC vs. TO-277 3-PowerDFN). The STTH4R02S is suitable for applications where faster switching characteristics and improved leakage performance are beneficial. Package footprint differences require PCB layout verification. The STTH4R02S provides significantly higher inventory availability (17600 pcs).

All substitute parts maintain active product status, RoHS3 compliance, and unlimited moisture sensitivity rating (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can AS4PD-M3/86A be used as a direct replacement for AS4PD-M3/87A?

A: Yes. The AS4PD-M3/86A is a parametric equivalent with identical electrical specifications including reverse voltage (200V), average rectified current (2.4A), forward voltage (962 mV @ 2A), reverse recovery time (1.8 µs), reverse leakage current (10 µA @ 200V), and capacitance (60pF @ 4V, 1MHz). Both parts use the same TO-277 3-PowerDFN package and are manufactured by Vishay General Semiconductor - Diodes Division. No circuit modifications are required.

Q: What are the key differences between AS4PD-M3/87A and STTH4R02S?

A: The primary differences are: (1) Technology: AS4PD-M3/87A uses avalanche technology while STTH4R02S uses standard technology; (2) Recovery speed: STTH4R02S has significantly faster recovery time (30 ns vs. 1.8 µs); (3) Reverse leakage: STTH4R02S has lower leakage current (3 µA vs. 10 µA); (4) Current rating: STTH4R02S is rated for 4A vs. 2.4A; (5) Package: STTH4R02S uses DO-214AB SMC package vs. TO-277 3-PowerDFN. Both maintain 200V reverse voltage rating and RoHS3 compliance.

Q: Is the STTH4R02S package compatible with the AS4PD-M3/87A PCB footprint?

A: No. The AS4PD-M3/87A uses a TO-277 3-PowerDFN package while the STTH4R02S uses a DO-214AB SMC package. These packages have different footprints and pin configurations. PCB layout modifications are required if substituting with STTH4R02S.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The AS4PD-M3/86A and STTH4R02S are both ROHS3 compliant, matching the compliance status of the AS4PD-M3/87A.

Q: Which substitute part has better availability?

A: The STTH4R02S has the highest inventory availability at 17600 pcs, followed by AS4PD-M3/86A at 4300 pcs, compared to AS4PD-M3/87A at 998 pcs.

Q: Can STTH4R02S handle the same current as AS4PD-M3/87A?

A: The STTH4R02S is rated for 4A average rectified current, which exceeds the 2.4A rating of AS4PD-M3/87A. The STTH4R02S can handle higher current levels, making it suitable for applications requiring increased current capacity within the same 200V voltage class.

Q: What is the operating temperature range for each part?

A: AS4PD-M3/87A and AS4PD-M3/86A both operate from -55°C to 175°C junction temperature. STTH4R02S has a maximum junction temperature of 175°C without a specified minimum, indicating a different temperature range specification.