AS1FJ-M3/I Equivalent & Substitute Parts

Part Overview

The AS1FJ-M3/I is an avalanche diode rated for 600 V DC reverse voltage and 1.5 A average rectified current, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount rectifier diode in DO-219AB package is designed for automotive applications and carries AEC-Q101 qualification. The part is currently active in production with 835 units in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters. Alternative packaging formats (Cut Tape versus Tape & Reel) and identical electrical specifications enable direct functional replacement in circuit designs.

Substiute Parts

AS1FJ-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 938AS1FJ-M3/I Datasheet

Current PartRFQ

AS1FJ-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 19052AS1FJ-M3/H Datasheet

Parametric EquivalentRFQ

AS1FJHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 18952AS1FJHM3/H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS1FJ-M3/I are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Electrical Parameters (Must Match Exactly):

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 1.5 A
• Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 1.5 A
• Reverse Recovery Time (trr): 1.3 µs
• Current - Reverse Leakage @ Vr: 5 µA @ 600 V
• Capacitance @ Vr, F: 8.8 pF @ 4V, 1MHz

Mechanical Parameters (Must Match Exactly):

• Package / Case: DO-219AB
• Mounting Type: Surface Mount
• Technology: Avalanche

Compliance & Qualification (Must Match Exactly):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Allowable Variation:

• Packaging format (Tape & Reel versus Cut Tape) does not affect electrical or mechanical compatibility
• Moisture Sensitivity Level (MSL) differences do not affect substitution validity

Parameter Comparison

Engineering Selection Recommendations

All three parts—AS1FJ-M3/I, AS1FJ-M3/H, and AS1FJHM3/H—are active production components manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications and mechanical compatibility. Each part carries AEC-Q101 automotive qualification and ROHS3 compliance, confirming suitability for automotive rectifier applications requiring 600 V reverse voltage and 1.5 A average rectified current.

The primary distinction between parts is packaging format. The AS1FJ-M3/I is supplied in Tape & Reel format, while AS1FJ-M3/H and AS1FJHM3/H are supplied in Cut Tape format. This difference affects supply chain logistics and assembly processes but does not alter electrical performance or circuit functionality.

Selection between substitute parts should be based on packaging requirements and inventory availability. All three parts are functionally interchangeable in circuit applications where the DO-219AB surface mount package and specified electrical parameters are required.

Frequently Asked Questions (FAQ)

Q: Can AS1FJ-M3/H or AS1FJHM3/H be used as direct replacements for AS1FJ-M3/I in production assemblies?

A: Yes. Both substitute parts maintain identical electrical specifications, mechanical compatibility, and automotive qualification. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect circuit performance or component functionality.

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

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on cut segments of carrier tape, suitable for lower-volume or manual assembly processes. Both formats contain identical components in the same DO-219AB package.

Q: Are all three parts qualified for automotive applications?

A: Yes. AS1FJ-M3/I, AS1FJ-M3/H, and AS1FJHM3/H all carry AEC-Q101 automotive qualification and Automotive grade designation, confirming compliance with automotive reliability and quality standards.

Q: Do the substitute parts have the same reverse recovery time and forward voltage characteristics?

A: Yes. All three parts specify identical reverse recovery time (1.3 µs), forward voltage (1.15 V @ 1.5 A), and reverse leakage current (5 µA @ 600 V). These parameters are critical for rectifier performance and are matched across all substitute options.

Q: What is the operating temperature range for these diodes?

A: The operating junction temperature range for AS1FJ-M3/I, AS1FJ-M3/H, and AS1FJHM3/H is -55°C to 175°C, suitable for automotive and industrial applications with extended temperature requirements.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, confirming compliance with environmental and hazardous substance regulations.