Equivalent & Substitute Parts for S4PD-M3/87A

Part Overview

The S4PD-M3/87A is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 200 V DC reverse voltage with a 4 A average rectified current rating and is housed in a TO-277A (SMPC) package. The device 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 design continuity when the primary part number becomes unavailable or when specific performance characteristics are required for particular applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 4 A	V
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Package / Case	TO-277, 3-PowerDFN	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the S4PD-M3/87A are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 4 A
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Parametric Equivalent Classification: Parts that match all critical parameters with identical or superior electrical characteristics within the same package family are classified as parametric equivalents. The S4PD-M3/86A meets this classification as a direct Vishay equivalent within the eSMP® series.

Manufacturer Recommended Substitute Classification: Parts from alternative manufacturers that meet or exceed the critical electrical parameters but may differ in secondary characteristics (such as recovery time, forward voltage, or package designation) are classified as manufacturer recommended substitutes. The STTH4R02S from STMicroelectronics qualifies under this classification, offering improved performance characteristics in specific parameters while maintaining functional compatibility.

Parameter Comparison

Parameter	S4PD-M3/87A (Main)	S4PD-M3/86A (Parametric Equivalent)	STTH4R02S (Mfr Recommended)
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V
Current - Average Rectified (Io)	4 A	4 A	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A	1.1 V @ 4 A	1.05 V @ 4 A
Speed Classification	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns
Reverse Recovery Time (trr)	2.5 µs	2.5 µs	30 ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	10 µA @ 200 V	3 µA @ 200 V
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	DO-214AB, SMC
Supplier Device Package	TO-277A (SMPC)	TO-277A (SMPC)	SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction (Max)	150°C	150°C	175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

S4PD-M3/86A Selection Criteria: The S4PD-M3/86A is a direct parametric equivalent to the S4PD-M3/87A. Both devices share identical electrical specifications, package designation, and thermal ratings. This substitute is appropriate for applications requiring exact specification matching within the Vishay eSMP® product line. Both parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and REACH unaffected status. The S4PD-M3/86A offers higher inventory availability (5600 units) compared to the primary part number.

STTH4R02S Selection Criteria: The STTH4R02S from STMicroelectronics is a manufacturer recommended substitute suitable for applications where improved performance characteristics provide design advantages. This device offers superior reverse recovery time (30 ns versus 2.5 µs), lower forward voltage drop (1.05 V versus 1.1 V at 4 A), and reduced reverse leakage current (3 µA versus 10 µA at 200 V). The STTH4R02S operates at a higher maximum junction temperature (175°C versus 150°C). Package designation differs (DO-214AB/SMC versus TO-277A/3-PowerDFN), requiring PCB layout verification. The STTH4R02S maintains ROHS3 compliance and REACH unaffected status. This substitute is appropriate for designs where fast recovery characteristics, reduced power dissipation, or higher temperature operation provide functional or thermal benefits.

Frequently Asked Questions (FAQ)

Q: Can the S4PD-M3/86A be used as a direct replacement for the S4PD-M3/87A?

A: Yes. The S4PD-M3/86A is a parametric equivalent with identical electrical specifications, package type, and thermal ratings. No circuit modifications are required for substitution.

Q: What are the key differences between the S4PD-M3/87A and STTH4R02S?

A: The primary differences are: (1) Package designation—S4PD-M3/87A uses TO-277A (3-PowerDFN) while STTH4R02S uses SMC (DO-214AB), requiring PCB layout changes; (2) Recovery characteristics—STTH4R02S features fast recovery (30 ns) versus standard recovery (2.5 µs); (3) Forward voltage—STTH4R02S operates at 1.05 V versus 1.1 V at 4 A; (4) Maximum junction temperature—STTH4R02S rated to 175°C versus 150°C. All three parameters (voltage, current, and mounting type) remain equivalent.

Q: Does package difference between S4PD-M3/87A and STTH4R02S affect circuit performance?

A: Package difference requires PCB layout modification. The TO-277A (3-PowerDFN) and SMC (DO-214AB) packages have different footprints and thermal characteristics. Thermal performance and current distribution may differ. PCB design review is necessary when substituting between these package types.

Q: Are all three parts RoHS compliant?

A: Yes. The S4PD-M3/87A, S4PD-M3/86A, and STTH4R02S are all ROHS3 compliant with REACH unaffected status and MSL rating of 1 (Unlimited).

Q: Which substitute offers better performance for high-frequency applications?

A: The STTH4R02S is optimized for high-frequency operation due to its fast recovery characteristic (30 ns). The S4PD-M3/87A and S4PD-M3/86A are standard recovery devices (2.5 µs) suitable for lower frequency rectification circuits.

Q: Can STTH4R02S be used in applications requiring the exact TO-277A package?

A: No. The STTH4R02S uses SMC (DO-214AB) package, which is physically and electrically different from TO-277A (3-PowerDFN). Package-specific requirements must be verified before substitution.

Q: What is the inventory status of these parts?

A: S4PD-M3/87A has 933 units in stock, S4PD-M3/86A has 5600 units in stock, and STTH4R02S has 17600 units in stock.

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