S4PMHM3_A/I Equivalent & Substitute Parts

Part Overview

The S4PMHM3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 4 A average rectified current in a surface mount TO-277A (SMPC) package. This component is part of the eSMP® series and carries automotive-grade qualification (AEC-Q101).

The S4PMHM3_A/I is classified as obsolete. Equivalent and substitute parts are available to maintain design continuity and ensure supply chain availability for applications requiring 1 kV, 4 A general-purpose rectification in surface mount form factor.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	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 @ 1000 V	µA
Capacitance @ Vr, F	30 @ 4V, 1MHz	pF
Operating Temperature - Junction	-55 to 150	°C
Package / Case	TO-277, 3-PowerDFN
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the S4PMHM3_A/I is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 4 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 4 A
Reverse Recovery Time (trr): 2.5 µs
Current - Reverse Leakage @ Vr: 10 µA @ 1000 V
Capacitance @ Vr, F: 30 pF @ 4V, 1MHz
Operating Temperature - Junction: -55°C to 150°C

Mechanical Parameters (Must Match):

Package / Case: TO-277, 3-PowerDFN
Mounting Type: Surface Mount
Supplier Device Package: TO-277A (SMPC)

Compliance & Certification (Must Match):

Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the original S4PMHM3_A/I. Differences in packaging format (Tape & Reel, Cut Tape, Digi-Reel®) and product status do not affect functional equivalence.

Parameter Comparison

Parameter	S4PMHM3_A/I	S4PMHM3_B/I	S4PM-M3/86A	S4PM-M3/87A	S4PMHM3_A/H
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	4 A	4 A	4 A	4 A	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A	1.1 V @ 4 A	1.1 V @ 4 A	1.1 V @ 4 A	1.1 V @ 4 A
Reverse Recovery Time (trr)	2.5 µs	2.5 µs	2.5 µs	2.5 µs	2.5 µs
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V
Capacitance @ Vr, F	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Not specified	Not specified	Not specified	Automotive
Qualification	AEC-Q101	Not specified	Not specified	Not specified	AEC-Q101
Product Status	Obsolete	Active	Active	Active	Obsolete
Packaging Format	Bulk	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

Primary Recommendation: S4PMHM3_B/I

The S4PMHM3_B/I is the manufacturer-recommended equivalent for the obsolete S4PMHM3_A/I. This part maintains full electrical and mechanical compatibility while offering active product status, ensuring long-term supply availability. Both parts are identical in electrical performance and package configuration.

Secondary Recommendations: S4PM-M3/86A and S4PM-M3/87A

Both S4PM-M3/86A and S4PM-M3/87A are parametric equivalents with active product status. These parts deliver identical electrical characteristics and thermal performance. Selection between these options and S4PMHM3_B/I should be based on packaging format requirements:

S4PM-M3/86A: Available in Cut Tape (CT) & Digi-Reel® format with highest inventory (2989 pcs)
S4PM-M3/87A: Available in Tape & Reel (TR) format with 1091 pcs in stock

Alternative: S4PMHM3_A/H

The S4PMHM3_A/H is a parametric equivalent with automotive-grade qualification and AEC-Q101 certification. However, this part carries obsolete product status. Selection of this part should be limited to applications where existing inventory or design documentation specifically references this part number.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), and identical operating temperature ranges (-55°C to 150°C junction temperature).

Frequently Asked Questions (FAQ)

Q: Can S4PMHM3_B/I be used as a direct replacement for S4PMHM3_A/I?

A: Yes. The S4PMHM3_B/I is electrically and mechanically identical to the S4PMHM3_A/I. Both parts share the same voltage rating (1000 V), current rating (4 A), forward voltage drop (1.1 V @ 4 A), reverse recovery time (2.5 µs), and package configuration (TO-277A SMPC). The primary difference is product status: S4PMHM3_B/I is active, while S4PMHM3_A/I is obsolete.

Q: What is the difference between S4PM-M3/86A and S4PM-M3/87A?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is packaging format: S4PM-M3/86A is supplied in Cut Tape (CT) & Digi-Reel® format, while S4PM-M3/87A is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and inventory management preferences.

Q: Are all substitute parts automotive-qualified?

A: The S4PMHM3_A/I and S4PMHM3_A/H carry automotive-grade designation with AEC-Q101 qualification. The S4PM-M3/86A and S4PM-M3/87A do not list automotive grade or AEC-Q101 qualification in their specifications. For applications requiring automotive qualification, use S4PMHM3_B/I or S4PMHM3_A/H.

Q: Can I use S4PM-M3/86A in an automotive application?

A: The S4PM-M3/86A does not carry automotive-grade designation or AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 compliance, use S4PMHM3_B/I or S4PMHM3_A/H.

Q: What is the difference in packaging between these parts?

A: All substitute parts use the same TO-277A (SMPC) package and 3-PowerDFN case style. Differences exist only in supply format: Bulk, Tape & Reel (TR), Cut Tape (CT), or Digi-Reel®. These format differences do not affect electrical performance or PCB mounting compatibility.

Q: Is there a difference in reverse leakage current between substitute parts?

A: No. All parts listed maintain identical reverse leakage current specifications: 10 µA @ 1000 V. This parameter is critical for high-voltage applications and is held constant across all equivalents.

Q: Can I mix packaging formats in a single production run?

A: Yes. All substitute parts are electrically and mechanically identical. Mixing packaging formats (Tape & Reel, Cut Tape, Digi-Reel®) does not affect circuit performance. However, assembly line equipment compatibility and inventory management procedures should be evaluated before implementation.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across the same junction temperature range: -55°C to 150°C. This specification is held constant across all equivalents and determines thermal performance in the application circuit.

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