AS1FJHM3/I Equivalent & Substitute Parts

Part Overview

The AS1FJHM3/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 classified as Active product status and meets automotive-grade specifications including AEC-Q101 qualification. The part is supplied in Tape & Reel (TR) packaging format. Substitute parts are identified based on identical electrical performance parameters and mechanical compatibility within the DO-219AB package family.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 1.5 A	V
Reverse Recovery Time (trr)	1.3	µs
Current - Reverse Leakage @ Vr	5 @ 600 V	µA
Capacitance @ Vr, F	8.8 @ 4V, 1MHz	pF
Operating Temperature - Junction	-55 to 175	°C
Package / Case	DO-219AB	—
Technology	Avalanche	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the AS1FJHM3/I are determined by matching the following critical electrical and mechanical parameters:

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
Operating Temperature - Junction: -55°C to 175°C
Package / Case: DO-219AB (SMF)
Technology: Avalanche
Grade: Automotive
Qualification: AEC-Q101

All identified substitute parts maintain identical electrical performance and mechanical compatibility. Differences exist only in packaging format (Tape & Reel versus Cut Tape) and inventory availability.

Parameter Comparison

Parameter	AS1FJHM3/I (Main)	AS1FJ-M3/H (Substitute)	AS1FJHM3/H (Substitute)
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Avalanche	Avalanche	Avalanche
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 1.5 A	1.15 V @ 1.5 A
Reverse Recovery Time (trr)	1.3 µs	1.3 µs	1.3 µs
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Capacitance @ Vr, F	8.8 pF @ 4V, 1MHz	8.8 pF @ 4V, 1MHz	8.8 pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
Package / Case	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)

Engineering Selection Recommendations

All identified substitute parts—AS1FJ-M3/H and AS1FJHM3/H—are direct parametric equivalents to the AS1FJHM3/I. Each part maintains Active product status and carries identical electrical specifications, mechanical compatibility, and compliance certifications.

Selection between the main part and substitutes is determined by packaging requirements:

AS1FJHM3/I: Supplied in Tape & Reel (TR) format, suitable for high-volume automated assembly operations.
AS1FJ-M3/H: Supplied in Cut Tape (CT) format with 19,013 pieces in stock.
AS1FJHM3/H: Supplied in Cut Tape (CT) format with 18,860 pieces in stock.

All parts comply with ROHS3 and REACH requirements. Automotive-grade classification and AEC-Q101 qualification are maintained across all variants. The DO-219AB surface mount package ensures mechanical interchangeability in PCB layouts.

Frequently Asked Questions (FAQ)

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

A: Yes. Both substitute parts are parametric equivalents with identical electrical performance (600 V reverse voltage, 1.5 A average rectified current, 1.15 V forward voltage, 1.3 µs reverse recovery time) and mechanical compatibility in the DO-219AB package. The only difference is packaging format: the main part uses Tape & Reel while substitutes use Cut Tape.

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, optimized for high-speed automated pick-and-place assembly. Cut Tape (CT) packaging supplies the same components on cut segments of carrier tape, suitable for lower-volume applications or manual assembly processes. Electrical and mechanical specifications remain identical.

Q: Are all three parts automotive-qualified?

A: Yes. AS1FJHM3/I, AS1FJ-M3/H, and AS1FJHM3/H all carry Automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Do the substitute parts have the same operating temperature range?

A: Yes. All three parts operate across the junction temperature range of -55°C to 175°C, ensuring thermal compatibility in equivalent applications.

Q: Are there any compliance differences between the main part and substitutes?

A: No. All three parts are ROHS3 Compliant and REACH Unaffected, maintaining identical environmental compliance status.

Q: What determines whether a part can substitute for the AS1FJHM3/I?

A: Substitution is determined by matching all critical electrical parameters (reverse voltage, average rectified current, forward voltage, reverse recovery time, reverse leakage current, and capacitance), mechanical package type (DO-219AB), technology classification (Avalanche), and compliance certifications (Automotive grade, AEC-Q101, ROHS3, REACH).

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