EU02A Equivalent & Substitute Parts

Part Overview

The EU02A is a general-purpose rectifier diode manufactured by Sanken Electric USA Inc., rated for 600 V DC reverse voltage and 1 A average rectified current. This through-hole axial package diode operates across a junction temperature range of -40°C to 150°C and features fast recovery characteristics with a reverse recovery time of 400 ns. The part is RoHS compliant and currently active in production with 721 pieces in stock.

Substitute parts are necessary when the EU02A becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for equivalent electrical performance with different recovery speed characteristics. Substitute selection must maintain compatibility with the 600 V / 1 A electrical ratings and through-hole mounting requirement.

Key Parameters

Parameter	EU02A Value	Unit	Substitution Criticality
Voltage - DC Reverse (Vr) Max	600	V	Critical
Current - Average Rectified (Io)	1	A	Critical
Voltage - Forward (Vf) Max @ If	1.4 V @ 1 A	V	Important
Speed Classification	Fast Recovery ≤ 500ns	ns	Important
Reverse Recovery Time (trr)	400	ns	Important
Current - Reverse Leakage @ Vr	10	µA @ 600 V	Secondary
Mounting Type	Through Hole	-	Critical
Package / Case	Axial	-	Important
Operating Temperature - Junction	-40 to 150	°C	Important
RoHS Status	RoHS Compliant	-	Important

Substitute Part Grouping Explanation

Substitute parts for the EU02A are grouped into two categories based on recovery speed classification and package format:

Category 1: Fast Recovery Axial Package Diodes These substitutes maintain the fast recovery characteristic (≤ 500 ns) and axial package format of the EU02A. They are electrically equivalent for applications requiring fast switching performance. The 1N4937-E3/54 belongs to this category with a 200 ns reverse recovery time.

Category 2: Standard Recovery DO-41 / DO-204AL Package Diodes These substitutes feature standard recovery characteristics (> 500 ns) and are packaged in DO-41 or DO-204AL formats. They maintain the 600 V / 1 A electrical ratings but differ in recovery speed and physical package dimensions. This category includes 1N4005-E3/54, 1N4005-E3/73, 1N4005-T, 1N4005-TP, 1N4005G, and 1N4005G-T.

Category 3: Standard Recovery Axial Package Diodes These substitutes maintain the axial package format but feature standard recovery characteristics. This category includes 1N4247 and 1N4005RLG.

Category 4: Standard Recovery DO-15 / DO-204AC Package Diodes The 1N4385GP-E3/54 provides standard recovery performance in a DO-204AC (DO-15) axial package format.

All substitute parts maintain the critical electrical parameters: 600 V DC reverse voltage rating and 1 A average rectified current. All are through-hole mounted components. Substitution compatibility depends on application tolerance for recovery speed differences and physical package accommodation in the circuit board layout.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) V	Speed Class	trr (ns)	Ir @ Vr (µA)	Package	Temp Range (°C)	RoHS Status	Product Status
EU02A	Sanken Electric USA Inc.	600	1	1.4 @ 1A	Fast Recovery ≤ 500ns	400	10 @ 600V	Axial	-40 to 150	RoHS Compliant	Active
1N4005-E3/54	Vishay General Semiconductor	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant	Active
1N4005-E3/73	Vishay General Semiconductor	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant	Active
1N4005-T	Diodes Incorporated	600	1	1.0 @ 1A	Standard Recovery > 500ns	-	5 @ 600V	DO-204AL (DO-41)	-65 to 150	ROHS3 Compliant	Last Time Buy
1N4005-TP	Micro Commercial Co	600	1	1.1 @ 1A	Standard Recovery > 500ns	2000	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant	Active
1N4005G	Good-Ark Semiconductor	600	1	1.1 @ 1A	Standard Recovery > 500ns	1000	5 @ 600V	DO-204AL (DO-41)	-55 to 150	ROHS3 Compliant	Active
1N4005G-T	Diodes Incorporated	600	1	1.0 @ 1A	Standard Recovery > 500ns	2000	5 @ 600V	DO-204AL (DO-41)	-65 to 175	ROHS3 Compliant	Active
1N4005RLG	onsemi	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	10 @ 600V	Axial	-65 to 175	ROHS3 Compliant	Not For New Designs
1N4247	Microchip Technology	600	1	1.3 @ 3A	Standard Recovery > 500ns	5000	1 @ 600V	Axial	-65 to 175	RoHS non-compliant	Active
1N4385GP-E3/54	Vishay General Semiconductor	600	1	1.0 @ 1A	Standard Recovery > 500ns	2000	5 @ 600V	DO-204AC (DO-15)	-65 to 175	ROHS3 Compliant	Active
1N4937-E3/54	Vishay General Semiconductor	600	1	1.2 @ 1A	Fast Recovery ≤ 500ns	200	5 @ 600V	DO-204AL (DO-41)	-50 to 150	ROHS3 Compliant	Active

Engineering Selection Recommendations

For Fast Recovery Applications (≤ 500 ns requirement): The 1N4937-E3/54 is the primary substitute when fast recovery performance equivalent to the EU02A is required. It maintains the 600 V / 1 A ratings with a 200 ns reverse recovery time and is ROHS3 compliant with active product status. The package format differs (DO-204AL vs. Axial), requiring verification of circuit board layout compatibility.

For Standard Recovery Applications with Axial Package Requirement: The 1N4005RLG provides axial package compatibility with standard recovery characteristics. However, this part carries a "Not For New Designs" status and should be used only for legacy system maintenance or replacement applications. The 1N4247 offers an alternative axial package option but is RoHS non-compliant, limiting its use in regulated applications.

For Standard Recovery Applications with DO-41 Package Accommodation: The 1N4005-E3/73 from Vishay General Semiconductor offers the highest inventory availability (80,421 pieces) with ROHS3 compliance and active product status. The 1N4005-TP from Micro Commercial Co provides similar electrical performance with 110,625 pieces in stock. Both are suitable for applications where standard recovery speed is acceptable and DO-41 package format can be accommodated.

For Extended Temperature Range Requirements: The 1N4005G-T and 1N4005RLG support operating temperatures to 175°C, exceeding the EU02A maximum of 150°C. The 1N4005G-T is recommended for this application due to its active product status and ROHS3 compliance.

For DO-15 Package Format: The 1N4385GP-E3/54 provides substitution capability in DO-204AC (DO-15) format with ROHS3 compliance and active status, suitable for applications requiring this specific package geometry.

Frequently Asked Questions (FAQ)

Q: Can the 1N4005 series replace the EU02A directly? A: The 1N4005 series maintains the critical 600 V / 1 A electrical ratings and through-hole mounting requirement. However, the 1N4005 series features standard recovery characteristics (> 500 ns) compared to the EU02A's fast recovery (400 ns). Direct replacement is possible only in applications where standard recovery speed is acceptable. Additionally, most 1N4005 variants use DO-41 package format rather than axial, requiring circuit board layout verification.

Q: What is the difference between fast recovery and standard recovery diodes? A: Recovery speed refers to the reverse recovery time (trr), which is the time required for a diode to stop conducting when the applied voltage reverses. The EU02A has a 400 ns reverse recovery time (fast recovery), while standard recovery diodes like the 1N4005 series exceed 500 ns. Fast recovery diodes are preferred in high-frequency switching applications to minimize switching losses and electromagnetic interference. Standard recovery diodes are suitable for lower-frequency applications and general-purpose rectification.

Q: Are all substitute parts RoHS compliant? A: Most substitute parts listed are ROHS3 compliant. The exception is the 1N4247 from Microchip Technology, which is RoHS non-compliant. For applications subject to RoHS regulations, use only parts marked as ROHS3 Compliant or RoHS Compliant.

Q: What is the significance of package format differences? A: The EU02A uses an axial package format, while many substitutes use DO-41 (DO-204AL) or DO-15 (DO-204AC) formats. These formats differ in physical dimensions and lead spacing. Circuit board layouts designed for axial packages may not accommodate DO-41 packages without modification. Verify that the selected substitute package format is compatible with the existing circuit board design and assembly equipment.

Q: Can I use the 1N4937-E3/54 as a direct replacement for the EU02A? A: The 1N4937-E3/54 maintains fast recovery performance (200 ns) and the 600 V / 1 A electrical ratings. However, it uses a DO-204AL (DO-41) package format instead of axial. The operating temperature range differs (-50°C to 150°C vs. -40°C to 150°C). Substitution is possible only if the circuit board layout accommodates the DO-41 package and the operating temperature range is acceptable.

Q: Why is the 1N4005RLG marked "Not For New Designs"? A: Parts marked "Not For New Designs" are in the end-of-life phase and may have limited availability or production support. While the 1N4005RLG can be used for replacement in existing systems, it should not be selected for new product designs. Use active status parts such as 1N4005-E3/73 or 1N4005-TP for new designs.

Q: What is the difference between 1N4005-E3/54 and 1N4005-E3/73? A: Both parts are electrically identical 600 V / 1 A standard recovery diodes in DO-204AL (DO-41) package format from Vishay General Semiconductor. The difference is in the tape reel configuration (E3/54 vs. E3/73), which affects packaging and handling but not electrical performance. The 1N4005-E3/73 has significantly higher inventory availability (80,421 vs. 6,744 pieces).

Q: Can I use the 1N4247 in a new design? A: The 1N4247 is active in production and maintains the 600 V / 1 A electrical ratings in an axial package format. However, it is RoHS non-compliant, which restricts its use in applications subject to RoHS regulations or customer requirements. For new designs, select ROHS3 compliant alternatives such as the 1N4005-E3/73 or 1N4937-E3/54.

Q: What is the reverse leakage current significance? A: Reverse leakage current (Ir) is the small current that flows through a reverse-biased diode. The EU02A specifies 10 µA at 600 V, while most substitute parts specify 5 µA. Lower reverse leakage is generally preferable as it reduces power dissipation and heat generation. The 1N4247 specifies only 1 µA, offering superior performance in this parameter. For most general-purpose applications, the difference between 5 µA and 10 µA is negligible.

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