AU02A Equivalent & Substitute Parts

Part Overview

The AU02A is a general-purpose rectifier diode manufactured by Sanken Electric USA Inc., rated for 600 V DC reverse voltage and 800 mA average rectified current. This through-hole axial package diode is classified as a fast recovery device with a reverse recovery time of 400 ns, suitable for standard rectification applications requiring moderate current handling and fast switching characteristics. The part is Active in product status and RoHS Compliant, with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the AU02A becomes unavailable due to inventory constraints, manufacturing discontinuation, or supply chain disruptions. Alternative devices meeting equivalent electrical and mechanical specifications enable design continuity and production scheduling flexibility.

Key Parameters

Parameter	AU02A Value	Unit
Voltage - DC Reverse (Vr) Maximum	600	V
Current - Average Rectified (Io)	800	mA
Voltage - Forward (Vf) Maximum @ If	1.3 @ 800 mA	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
Reverse Recovery Time (trr)	400	ns
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Through Hole	-
Package / Case	Axial	-
Operating Temperature - Junction	-40 to 150	°C
RoHS Status	RoHS Compliant	-

Substitute Part Grouping Explanation

Substitution of the AU02A is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 600 V minimum
Current - Average Rectified (Io): 800 mA minimum
Mounting Type: Through Hole
Package / Case: Axial compatible

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics within acceptable operating range
Reverse recovery time (trr) classification (Fast Recovery preferred for AU02A replacement)
Reverse leakage current at rated voltage
Operating temperature range encompassing -40°C to 150°C minimum

The substitute parts listed below meet or exceed the AU02A electrical specifications while maintaining through-hole axial package compatibility. Parts are grouped by their ability to directly replace the AU02A in existing circuit designs without modification to PCB layout or component footprint.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (mA)	Vf (Max) V	Speed	trr (ns/µs)	Ir @ Vr (µA)	Package	Temp Range °C	RoHS Status
AU02A	Sanken Electric USA Inc.	600	800	1.3 @ 800mA	Fast Recovery ≤500ns	400	10 @ 600V	Axial	-40 to 150	RoHS Compliant
1N4005-E3/54	Vishay General Semiconductor	600	1000	1.1 @ 1A	Standard Recovery >500ns	-	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant
1N4005-E3/73	Vishay General Semiconductor	600	1000	1.1 @ 1A	Standard Recovery >500ns	-	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant
1N4005-T	Diodes Incorporated	600	1000	1.0 @ 1A	Standard Recovery >500ns	-	5 @ 600V	DO-204AL (DO-41)	-65 to 150	ROHS3 Compliant
1N4005-TP	Micro Commercial Co	600	1000	1.1 @ 1A	Standard Recovery >500ns	2	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant
1N4005G	Good-Ark Semiconductor	600	1000	1.1 @ 1A	Standard Recovery >500ns	1	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant
1N4005G-T	Diodes Incorporated	600	1000	1.0 @ 1A	Standard Recovery >500ns	2	5 @ 600V	DO-204AL (DO-41)	-65 to 175	ROHS3 Compliant
1N4005GP-E3/54	Vishay General Semiconductor	600	1000	1.1 @ 1A	Standard Recovery >500ns	2	5 @ 600V	DO-204AL (DO-41)	-65 to 175	ROHS3 Compliant
1N4005GP-E3/73	Vishay General Semiconductor	600	1000	1.1 @ 1A	Standard Recovery >500ns	2	5 @ 600V	DO-204AL (DO-41)	-65 to 175	ROHS3 Compliant
1N4005RLG	onsemi	600	1000	1.1 @ 1A	Standard Recovery >500ns	-	10 @ 600V	DO-204AL (DO-41)	-65 to 175	ROHS3 Compliant
1N4247	Microchip Technology	600	1000	1.3 @ 3A	Standard Recovery >500ns	5	1 @ 600V	Axial	-65 to 175	RoHS non-compliant

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status, Full RoHS3 Compliance):

The 1N4005 series devices from Vishay General Semiconductor (1N4005GP-E3/54, 1N4005GP-E3/73), Diodes Incorporated (1N4005G-T), and Micro Commercial Co (1N4005-TP) are primary substitutes for the AU02A. These parts meet or exceed the AU02A voltage and current ratings while providing superior reverse leakage characteristics (5 µA versus 10 µA). All listed 1N4005 variants maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Substitutes (Conditional Use):

The 1N4005RLG from onsemi carries "Not For New Designs" status and should be used only for legacy system maintenance or repair applications where design continuity is required. The 1N4247 from Microchip Technology is RoHS non-compliant and is suitable only for applications where RoHS compliance is not mandated.

Package Compatibility Consideration:

The AU02A uses an Axial package. Most substitute parts (1N4005 series) are available in DO-204AL (DO-41) package, which is mechanically and electrically compatible with axial through-hole mounting. The 1N4247 maintains true axial package designation, providing direct footprint compatibility with the AU02A.

Current Rating Margin:

All listed substitutes provide 1 A (1000 mA) average rectified current, exceeding the AU02A specification of 800 mA. This 25% current margin provides design flexibility for applications requiring higher current capacity without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AU02A with 1N4005GP-E3/54 without PCB modification?

A: Yes. Both devices use through-hole axial packages with identical lead spacing and polarity marking. The 1N4005GP-E3/54 meets all electrical requirements and exceeds the AU02A current rating. No PCB layout changes are required.

Q: What is the difference between Fast Recovery and Standard Recovery classifications?

A: The AU02A is classified as Fast Recovery with 400 ns reverse recovery time. The 1N4005 series devices are Standard Recovery (>500 ns). For most general-purpose rectification applications, this difference is not functionally significant. Fast recovery characteristics are critical only in high-frequency switching circuits or applications with stringent EMI requirements.

Q: Why do some substitutes have lower reverse leakage current (5 µA) compared to AU02A (10 µA)?

A: Lower reverse leakage current indicates superior semiconductor material quality and manufacturing process control. This is a beneficial characteristic that improves circuit performance, particularly in high-impedance applications. The AU02A specification of 10 µA is within acceptable limits for standard rectification.

Q: Is the 1N4247 a suitable substitute despite RoHS non-compliance?

A: The 1N4247 is electrically equivalent and maintains axial package compatibility. However, RoHS non-compliance restricts its use to applications and markets where RoHS compliance is not required. For new designs or regulated industries, ROHS3-compliant alternatives (1N4005 series) are mandatory.

Q: What is the significance of operating temperature range differences?

A: The AU02A operates from -40°C to 150°C. Most 1N4005 variants extend to -55°C or -65°C minimum and 175°C maximum. Extended temperature ranges provide design margin for applications in extreme thermal environments. For standard industrial applications (-40°C to 150°C), all listed substitutes are suitable.

Q: Can I use 1N4005-T (Last Time Buy status) for new production?

A: The 1N4005-T carries "Last Time Buy" status, indicating the manufacturer has announced end-of-life. While currently available in inventory, this part is not recommended for new production designs. Use Active status alternatives (1N4005GP-E3/54, 1N4005G-T, 1N4005-TP) to ensure long-term supply continuity.

Q: How does the 25% current margin (1 A versus 800 mA) affect circuit design?

A: The higher current rating of substitute parts provides design flexibility without requiring circuit modification. Existing designs rated for 800 mA operate safely with 1 A-rated devices. No derating or thermal analysis changes are necessary for direct substitution.

Q: Are there any packaging variants I should be aware of?

A: The AU02A is supplied in Bulk packaging. Most 1N4005 substitutes are available in Cut Tape (CT) packaging. Both packaging formats contain identical components; the difference is in supply format only. Tape-and-reel packaging is standard for automated assembly, while bulk packaging is typical for manual assembly or repair applications.

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