AS1J-HF Equivalent & Substitute Parts Reference

Part Overview

The AS1J-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 600 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and meets AEC-Q101 automotive qualification standards. The diode operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 requirements.

Substitute parts are identified based on matching electrical performance parameters and mechanical compatibility. Alternative sources provide equivalent functional characteristics for applications requiring component availability, supply chain flexibility, or specific packaging configurations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts are classified as parametric equivalents when they satisfy all critical electrical parameters: 600 V DC reverse voltage rating, 1 A average rectified current, 1.1 V maximum forward voltage at 1 A, standard recovery speed characteristics, and -55°C to 150°C operating temperature range. All substitute parts maintain DO-214AC (SMA) surface mount package compatibility.

Substitution logic is based on the following key parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Speed: Standard Recovery >500ns, > 200mA (Io)
Operating Temperature - Junction: -55°C to 150°C
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Packaging variants (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical substitution eligibility but may influence procurement and handling procedures.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Reverse Leakage @ Vr [µA]	Tj Range [°C]	Package	Product Status	Packaging Type
AS1J-HF	Comchip Technology	600	1	1.1 @ 1 A	5 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Tape & Reel (TR)
S1J-HF	Comchip Technology	600	1	1.1 @ 1 A	5 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Cut Tape (CT) & Digi-Reel®
GS1J_R1_00001	Panjit International Inc.	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Tape & Reel (TR)
GS1JWG_R1_00001	Panjit International Inc.	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Not For New Designs	Tape & Reel (TR)
NRVA4005T3G	onsemi	600	1	1.1 @ 1 A	10 @ 600 V	-55 to 150	DO-214AC, SMA	Not For New Designs	Tape & Reel (TR)
S1J-E3/5AT	Vishay General Semiconductor - Diodes Division	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Cut Tape (CT) & Digi-Reel®
S1J-E3/61T	Vishay General Semiconductor - Diodes Division	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Cut Tape (CT) & Digi-Reel®
S1JHE3_A/H	Vishay General Semiconductor - Diodes Division	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Tape & Reel (TR)
S1JHE3_A/I	Vishay General Semiconductor - Diodes Division	600	1	1.1 @ 1 A	1 @ 600 V	-55 to 150	DO-214AC, SMA	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Primary Substitutes (Active Product Status)

S1J-HF, GS1J_R1_00001, S1J-E3/5AT, S1J-E3/61T, S1JHE3_A/H, and S1JHE3_A/I are classified as Active products and are suitable for new designs. These parts maintain full electrical equivalence to the AS1J-HF across all specified parameters. S1JHE3_A/H and S1JHE3_A/I carry AEC-Q101 automotive qualification matching the original part specification.

Secondary Substitutes (Not For New Designs)

GS1JWG_R1_00001 and NRVA4005T3G are designated as Not For New Designs. While these parts meet the core electrical parameters, their product status restricts application to legacy system support or maintenance scenarios only. NRVA4005T3G exhibits higher reverse leakage current (10 µA @ 600 V) compared to the AS1J-HF specification (5 µA @ 600 V), though this remains within acceptable rectifier diode performance ranges.

Packaging Considerations

Tape & Reel (TR) packaging is suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® packaging accommodates lower-volume production or mixed-component pick-and-place operations. Selection between packaging types depends on manufacturing process requirements rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can S1J-E3/5AT replace AS1J-HF in automotive applications?

A: Yes. S1J-E3/5AT meets all electrical parameters of AS1J-HF and maintains ROHS3 compliance. However, S1J-E3/5AT does not carry AEC-Q101 automotive qualification. For applications requiring AEC-Q101 certification, use S1JHE3_A/H or S1JHE3_A/I instead.

Q: What is the difference between S1J-HF and AS1J-HF?

A: Both parts are manufactured by Comchip Technology with identical electrical specifications. The primary difference is packaging: AS1J-HF is supplied in Tape & Reel (TR), while S1J-HF is supplied in Cut Tape (CT) & Digi-Reel®. Electrical performance is equivalent.

Q: Is GS1JWG_R1_00001 suitable for new product designs?

A: No. GS1JWG_R1_00001 carries a Not For New Designs product status designation. This part is restricted to legacy system maintenance and repair applications only. For new designs, select from Active status alternatives: GS1J_R1_00001, S1J-E3/5AT, S1J-E3/61T, S1JHE3_A/H, or S1JHE3_A/I.

Q: Does reverse leakage current variation affect substitution eligibility?

A: Reverse leakage current specifications vary among substitutes (1 µA to 10 µA @ 600 V) but all remain within standard rectifier diode performance tolerances. AS1J-HF specifies 5 µA @ 600 V. Substitutes with lower leakage (1 µA) provide improved performance. NRVA4005T3G at 10 µA remains functionally equivalent but represents the upper specification limit.

Q: Can I use Vishay S1J series parts in place of Comchip AS1J-HF?

A: Yes. Vishay S1J-E3/5AT, S1J-E3/61T, S1JHE3_A/H, and S1JHE3_A/I are parametric equivalents with identical electrical ratings and DO-214AC (SMA) package compatibility. Vishay parts offer lower reverse leakage current (1 µA) and documented reverse recovery time (1.8 µs). S1JHE3_A/H and S1JHE3_A/I include AEC-Q101 automotive qualification.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure precautions. All listed substitute parts carry MSL 1 classification, eliminating moisture-related handling constraints during storage and assembly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant status, matching the AS1J-HF environmental compliance requirement.

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