S3AFJHM3/I Equivalent & Substitute Parts

Part Overview

The S3AFJHM3/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface-mount diode is designed for standard rectification applications requiring 600 V reverse voltage rating and 3 A average rectified current capacity. The device is housed in a DO-221AC (SlimSMA) package with flat leads, suitable for automated assembly processes.

The S3AFJHM3/I maintains Active product status and carries automotive-grade qualification (AEC-Q101), making it suitable for demanding applications. Substitute parts are identified based on identical electrical performance parameters, mechanical compatibility, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

S3AFJHM3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 14096S3AFJHM3/I Datasheet

Current PartRFQ

S3AFJ-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 14762S3AFJ-M3/I Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S3AFJHM3/I are identified through parametric equivalence. The substitution logic is based on the following critical parameters that must remain identical:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 3 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 3 A
• Reverse Recovery Time (trr): 2.7 µs
• Current - Reverse Leakage @ Vr: 10 µA @ 600 V
• Capacitance @ Vr, F: 28 pF @ 4V, 1MHz

Mechanical Parameters:

• Package / Case: DO-221AC, SMA Flat Leads
• Mounting Type: Surface Mount

Compliance Parameters:

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

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both the S3AFJHM3/I and S3AFJ-M3/I are Active products from Vishay General Semiconductor - Diodes Division with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than technical performance differences.

Compliance Verification: Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance, confirming suitability for automotive and industrial applications requiring regulatory adherence. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity restrictions during storage and handling.

Interchangeability: The S3AFJ-M3/I functions as a direct parametric equivalent to the S3AFJHM3/I. No circuit redesign, thermal analysis revision, or PCB layout modification is required when substituting between these parts. Both devices are rated for identical reverse voltage (600 V), forward current (3 A), and operating temperature range (-55°C to 175°C).

Supply Chain Considerations: Current inventory levels differ between the two parts. Selection should account for lead time, procurement cost, and production scheduling requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can S3AFJ-M3/I be used as a direct replacement for S3AFJHM3/I?

A: Yes. The S3AFJ-M3/I is a parametric equivalent with identical electrical ratings (600 V reverse voltage, 3 A average rectified current), forward voltage characteristics (1.1 V @ 3 A), reverse recovery time (2.7 µs), and package configuration (DO-221AC, SMA Flat Leads). No circuit modifications are required.

Q: Are there any differences in automotive qualification between these parts?

A: No. Both parts carry identical AEC-Q101 automotive qualification and are rated for the same operating temperature range (-55°C to 175°C). Both comply with ROHS3 standards and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the significance of the DO-221AC package designation?

A: DO-221AC, also known as SlimSMA, is a surface-mount package with flat leads designed for automated PCB assembly. Both substitute parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and assembly equipment.

Q: How do reverse recovery time specifications affect circuit performance?

A: Both parts specify identical reverse recovery time (trr) of 2.7 µs, which determines switching speed and switching losses in rectification circuits. This parameter is critical for high-frequency applications and power supply efficiency calculations.

Q: What does MSL 1 (Unlimited) mean for component handling?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. Both parts can be stored and handled without special humidity control measures or baking procedures prior to soldering.

Q: Are these parts suitable for automotive applications?

A: Yes. Both parts carry automotive-grade designation and AEC-Q101 qualification, confirming compliance with automotive industry reliability and quality standards. They are suitable for engine control modules, power distribution systems, and other automotive electronic applications.