AR4PD-M3/87A Equivalent & Substitute Parts

Part Overview

The AR4PD-M3/87A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage and 2 A average rectified current in a surface mount TO-277A (SMPC) package. This component is part of the eSMP® series and maintains Active product status. Alternative equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application requirements where packaging or electrical performance variations are acceptable within specified parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.6 @ 4 A	V
Reverse Recovery Time (trr)	140	ns
Current - Reverse Leakage @ Vr	10 @ 200 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Operating Temperature - Junction	-55 to 175	°C
Package / Case	TO-277, 3-PowerDFN	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the AR4PD-M3/87A are identified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Current - Average Rectified (Io): 2 A minimum
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 175°C minimum
RoHS3 Compliance: Required

Packaging Flexibility: Substitutes may differ in packaging format (Tape & Reel versus Cut Tape) and package case designation (TO-277A versus SMC) provided the electrical parameters meet or exceed the main part specifications.

Substitute Categories:

Parametric Equivalent (Same Manufacturer): AR4PD-M3/86A differs only in packaging format (Cut Tape versus Tape & Reel) while maintaining identical electrical specifications.
Manufacturer Recommended Substitute (Cross-Manufacturer): STTH4R02S provides higher current rating (4 A versus 2 A) and improved reverse recovery time (30 ns versus 140 ns) with different package case (SMC versus TO-277A).

Parameter Comparison

Parameter	AR4PD-M3/87A	AR4PD-M3/86A	STTH4R02S
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	STMicroelectronics
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V
Current - Average Rectified (Io)	2 A	2 A	4 A
Voltage - Forward (Vf) (Max) @ If	1.6 V @ 4 A	1.6 V @ 4 A	1.05 V @ 4 A
Reverse Recovery Time (trr)	140 ns	140 ns	30 ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	10 µA @ 200 V	3 µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	DO-214AB, SMC
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	175°C (Max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

AR4PD-M3/86A Selection: Select AR4PD-M3/86A when packaging format flexibility is required. This part maintains identical electrical specifications and thermal performance to the AR4PD-M3/87A. The only distinction is the supply format: Cut Tape (CT) versus Tape & Reel (TR). Both parts carry ROHS3 compliance, MSL 1 rating, and Active product status. This substitution introduces no electrical or thermal performance variation.

STTH4R02S Selection: Select STTH4R02S when higher current capacity and improved reverse recovery performance are beneficial to circuit design. This STMicroelectronics part exceeds the minimum current requirement (4 A versus 2 A) and delivers superior reverse recovery time (30 ns versus 140 ns), resulting in reduced switching losses. The forward voltage drop is lower (1.05 V versus 1.6 V at 4 A), improving efficiency. Package case differs (SMC versus TO-277A), requiring PCB layout verification. STTH4R02S maintains ROHS3 compliance and MSL 1 rating. Operating temperature maximum is specified at 175°C without lower bound documentation; verify thermal design requirements for applications requiring -55°C operation.

Compliance Verification: All three parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, supporting deployment in standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can AR4PD-M3/86A replace AR4PD-M3/87A directly?

A: Yes. AR4PD-M3/86A is a parametric equivalent with identical electrical and thermal specifications. The only difference is packaging format: AR4PD-M3/86A is supplied in Cut Tape (CT) format while AR4PD-M3/87A is supplied in Tape & Reel (TR) format. Both are surface mount TO-277A (SMPC) packages with identical pin configurations and performance characteristics.

Q: What are the key differences between AR4PD-M3/87A and STTH4R02S?

A: STTH4R02S differs in three primary areas: (1) Current rating is doubled (4 A versus 2 A), (2) Reverse recovery time is significantly faster (30 ns versus 140 ns), and (3) Package case is SMC (DO-214AB) instead of TO-277A. Forward voltage drop is lower (1.05 V versus 1.6 V at 4 A). All three parts meet the 200 V reverse voltage requirement and fast recovery speed classification.

Q: Is STTH4R02S a direct pin-for-pin replacement?

A: No. While both are surface mount diodes with 200 V rating, STTH4R02S uses SMC package (DO-214AB) whereas AR4PD-M3/87A uses TO-277A package. Pin configurations differ. PCB layout and footprint modifications are required. Verify mechanical compatibility before substitution.

Q: Can I use STTH4R02S in a circuit designed for 2 A operation?

A: Yes. STTH4R02S is rated for 4 A average rectified current, which exceeds the 2 A requirement. Operating at 2 A is within specification and introduces no risk. The improved reverse recovery time (30 ns) and lower forward voltage drop (1.05 V) provide performance benefits in switching applications.

Q: Are all three parts RoHS3 compliant?

A: Yes. AR4PD-M3/87A, AR4PD-M3/86A, and STTH4R02S all carry ROHS3 Compliant status and are suitable for applications requiring RoHS3 certification.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) format supplies components on continuous carrier tape wound on a reel, suitable for high-volume automated assembly. Cut Tape (CT) format supplies components on cut segments of carrier tape, suitable for lower-volume or manual assembly operations. Electrical and thermal performance are identical; packaging format selection depends on assembly process requirements.

Q: Does operating temperature range differ between these parts?

A: AR4PD-M3/87A and AR4PD-M3/86A specify -55°C to 175°C junction temperature range. STTH4R02S specifies 175°C maximum without documented lower bound. For applications requiring -55°C operation, verify STTH4R02S performance specifications with the manufacturer or select AR4PD-M3/87A or AR4PD-M3/86A.

Q: What is the significance of reverse recovery time in these diodes?

A: Reverse recovery time (trr) is the interval required for a diode to transition from forward conduction to reverse blocking when the applied voltage reverses. Shorter recovery time reduces switching losses and improves efficiency in high-frequency switching applications. STTH4R02S (30 ns) recovers significantly faster than AR4PD-M3/87A (140 ns), making it preferable for applications with rapid switching transitions.

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