S4PKHM3_A/I Equivalent & Substitute Parts

Part Overview

The S4PKHM3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V DC reverse voltage and 4 A average rectified current in a surface mount TO-277A (SMPC) package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and procurement requirements. The part belongs to the eSMP® series and carries automotive-grade qualification under AEC-Q101 standard.

Substiute Parts

S4PKHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1205S4PKHM3_A/I Datasheet

Current PartRFQ

S4PKHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 964S4PKHM3_B/I Datasheet

MFR RecommendedRFQ

S4PK-M3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 3331S4PK-M3/86A Datasheet

Parametric EquivalentRFQ

S4PK-M3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1035S4PK-M3/87A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S4PKHM3_A/I is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 800 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 @ 800 V
• Capacitance @ Vr, F: 30 pF @ 4V, 1MHz

Mechanical Parameters (Must Match):

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

Compliance Parameters (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101
• Technology: Standard
• Speed: Standard Recovery >500ns, > 200mA (Io)

All identified substitute parts maintain identical electrical and mechanical specifications, ensuring direct functional replacement without circuit redesign or performance degradation.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: S4PKHM3_B/I

The S4PKHM3_B/I is the manufacturer-recommended substitute for the obsolete S4PKHM3_A/I. This part maintains identical electrical and mechanical specifications while offering active product status. Both parts carry automotive-grade qualification under AEC-Q101 standard, ensuring compliance with automotive reliability requirements. The S4PKHM3_B/I is available in Tape & Reel (TR) packaging format.

Secondary Recommendations: S4PK-M3/86A and S4PK-M3/87A

The S4PK-M3/86A and S4PK-M3/87A are parametric equivalents that provide identical electrical performance and mechanical compatibility. Both parts are active and available in Tape & Reel (TR) packaging. These alternatives offer higher inventory availability (3300 Pcs and 953 Pcs respectively) compared to the primary recommendation. Both parts comply with RoHS3, REACH Unaffected, and MSL 1 (Unlimited) specifications.

Selection Basis:

• All substitute parts maintain 800 V reverse voltage rating and 4 A current capacity
• All substitute parts utilize identical TO-277A (SMPC) surface mount package
• All substitute parts operate across -55°C to 150°C junction temperature range
• All substitute parts feature 2.5 µs reverse recovery time and standard recovery characteristics
• Primary and secondary recommendations differ only in product status (active vs. obsolete) and packaging format

Frequently Asked Questions (FAQ)

Q: Can S4PKHM3_B/I be used as a direct replacement for S4PKHM3_A/I?

A: Yes. The S4PKHM3_B/I is electrically and mechanically identical to the S4PKHM3_A/I. Both parts share the same voltage rating (800 V), current capacity (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: S4PKHM3_B/I is active while S4PKHM3_A/I is obsolete.

Q: What is the difference between S4PKHM3_B/I and S4PK-M3/86A?

A: Both parts are parametric equivalents with identical electrical specifications and mechanical compatibility. The S4PKHM3_B/I carries explicit automotive-grade qualification and AEC-Q101 certification. The S4PK-M3/86A provides equivalent performance with higher inventory availability. Selection between these parts depends on automotive qualification requirements for your specific application.

Q: Are all substitute parts suitable for automotive applications?

A: The S4PKHM3_B/I carries explicit automotive-grade designation and AEC-Q101 qualification. The S4PK-M3/86A and S4PK-M3/87A do not specify automotive grade or AEC-Q101 qualification in the provided data. For applications requiring automotive-grade components, the S4PKHM3_B/I is the appropriate selection.

Q: Can these diodes be used interchangeably in the same circuit board layout?

A: Yes. All substitute parts utilize the identical TO-277A (SMPC) surface mount package with the same 3-PowerDFN footprint. No PCB layout modifications are required for substitution.

Q: What is the significance of the reverse recovery time specification?

A: All substitute parts maintain the 2.5 µs reverse recovery time specification, ensuring identical switching characteristics and performance in rectification circuits. This parameter determines the diode's ability to block reverse current and is critical for circuit timing and efficiency.

Q: Are there any compliance differences between the substitute parts?

A: The S4PKHM3_A/I, S4PK-M3/86A, and S4PK-M3/87A are ROHS3 compliant with REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity. The S4PKHM3_B/I does not specify these compliance parameters in the provided data. All parts carry EAR99 ECCN classification and 8541.10.0080 HTSUS code.

Q: What packaging formats are available for these substitute parts?

A: The S4PKHM3_A/I original part does not specify packaging format. The substitute parts S4PKHM3_B/I, S4PK-M3/86A, and S4PK-M3/87A are available in Tape & Reel (TR) packaging format, suitable for automated assembly processes.