EG1 Equivalent & Substitute Parts

Part Overview

The EG1 is a general-purpose rectifier diode manufactured by Sanken Electric USA Inc., rated for 400 V DC reverse voltage and 800 mA average rectified current. This through-hole axial package diode features fast recovery characteristics with a reverse recovery time of 100 ns, making it suitable for standard rectification applications requiring moderate current handling and voltage blocking capability. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the EG1 becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design requirements call for enhanced performance characteristics such as higher current ratings or improved thermal specifications.

Key Parameters

Parameter	EG1 Value	Unit
Voltage - DC Reverse (Vr) Maximum	400	V
Current - Average Rectified (Io)	800	mA
Voltage - Forward (Vf) Maximum @ If	1.8 @ 800 mA	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	—
Reverse Recovery Time (trr)	100	ns
Current - Reverse Leakage @ Vr	50	µA @ 400 V
Operating Temperature - Junction	-40 to 150	°C
Mounting Type	Through Hole	—
Package / Case	Axial	—
RoHS Status	RoHS Compliant	—

Substitute Part Grouping Explanation

Substitution of the EG1 is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: All substitute parts must maintain a minimum DC reverse voltage rating of 400 V to ensure equivalent blocking capability in the application circuit.

Current Rating Consideration: The EG1 is rated for 800 mA average rectified current. Substitute parts rated at 1 A (1000 mA) provide direct functional equivalence with increased current margin. Parts with lower current ratings are not suitable; parts with higher ratings provide design flexibility.

Recovery Speed Classification: The EG1 exhibits fast recovery characteristics (≤ 500 ns, > 200 mA). Substitute parts classified as standard recovery (> 500 ns) represent a functional change in switching behavior and are acceptable only when application timing requirements do not demand fast recovery performance.

Mounting and Package Format: The EG1 uses through-hole axial packaging. Substitute parts must maintain through-hole mounting type and axial package configuration to ensure mechanical compatibility with existing printed circuit board layouts and assembly processes.

Temperature Range: The EG1 operates from -40°C to 150°C junction temperature. Substitute parts with equal or extended temperature ranges maintain thermal compatibility.

Compliance and Status: RoHS compliance and active product status ensure regulatory conformance and supply chain continuity.

Parameter Comparison

Parameter	EG1	1N4004-E3/54	1N4004-E3/73	1N4004-T	1N4004-TP	1N4004G	1N4004G-T	1N4004GP-E3/54	1N4004GP-E3/73	1N4004GP-TP	1N4004RLG
Voltage - DC Reverse (Vr) Max (V)	400	400	400	400	400	400	400	400	400	400	400
Current - Average Rectified (Io) (mA)	800	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000
Voltage - Forward (Vf) Max @ If (V)	1.8 @ 800 mA	1.1 @ 1 A	1.1 @ 1 A	1.0 @ 1 A	1.1 @ 1 A	1.0 @ 1 A	1.0 @ 1 A	1.1 @ 1 A	1.1 @ 1 A	1.1 @ 1 A	1.1 @ 1 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns
Reverse Recovery Time (trr) (ns)	100	—	—	—	2000	—	2000	2000	2000	2000	—
Current - Reverse Leakage @ Vr (µA)	50 @ 400 V	5 @ 400 V	5 @ 400 V	5 @ 400 V	5 @ 400 V	0.2 @ 400 V	5 @ 400 V	5 @ 400 V	5 @ 400 V	5 @ 400 V	10 @ 400 V
Operating Temperature - Junction (°C)	-40 to 150	-55 to 150	-55 to 150	-65 to 150	-55 to 150	-65 to 175	-65 to 175	-65 to 175	-65 to 175	-55 to 150	-65 to 175
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Last Time Buy	Active	Active	Active	Active	Active	Active	Not For New Designs

Engineering Selection Recommendations

Primary Substitute Selection: The 1N4004GP-E3/54 manufactured by Vishay General Semiconductor - Diodes Division is the preferred substitute for the EG1. This part maintains 400 V reverse voltage rating, provides 1 A average rectified current (exceeding the EG1's 800 mA requirement), operates across an extended temperature range of -65°C to 175°C, and carries active product status with ROHS3 compliance. The part is available in high inventory (40,609 units) and is designated as part of the SUPERECTIFIER® series.

Alternative Selections by Packaging Requirement:

For cut tape packaging: 1N4004-E3/54 (Vishay), 1N4004-T (Diodes Incorporated), 1N4004-TP (Micro Commercial Co), or 1N4004GP-TP (Micro Commercial Co) are functionally equivalent with active product status.

For tape and box packaging: 1N4004-E3/73 (Vishay) or 1N4004GP-E3/73 (Vishay) provide equivalent electrical specifications with alternative packaging format.

For automotive-qualified applications: 1N4004G (Rectron USA) carries AEC-Q101 qualification and automotive grade designation with extended temperature range to 175°C.

Considerations for Product Status: The 1N4004-T (Diodes Incorporated) carries "Last Time Buy" status, indicating limited future availability. The 1N4004RLG (onsemi) is marked "Not For New Designs," restricting its use to legacy system support only.

Recovery Speed Trade-off: All listed substitute parts operate with standard recovery characteristics (> 500 ns) compared to the EG1's fast recovery (100 ns). This represents a functional change in switching behavior. Applications requiring fast recovery performance must evaluate circuit timing impact before substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1N4004 series parts directly replace the EG1 in all applications?

A: The 1N4004 series parts maintain the same 400 V reverse voltage rating and provide higher current capacity (1 A versus 800 mA). However, they operate with standard recovery speed (> 500 ns) rather than the EG1's fast recovery (100 ns). Direct substitution is valid for applications where switching speed is not a critical timing parameter. Applications with strict timing requirements must evaluate the impact of increased reverse recovery time.

Q: What is the difference between the various 1N4004 part numbers from different manufacturers?

A: The base electrical specifications (400 V, 1 A, DO-41 package) are identical across manufacturers. Differences exist in forward voltage drop (ranging from 1.0 V to 1.1 V at 1 A), reverse leakage current (5 µA to 200 nA at 400 V), reverse recovery time (2 µs where specified), and operating temperature range (-55°C to -65°C minimum, 150°C to 175°C maximum). Manufacturer selection should be based on specific application requirements for these secondary parameters and supply chain availability.

Q: Why do some substitute parts have higher reverse leakage current than the EG1?

A: The EG1 specifies 50 µA reverse leakage at 400 V, while most 1N4004 variants specify 5 µA. This difference reflects manufacturing process variations and device design. The 1N4004G variant specifies only 200 nA reverse leakage, representing superior leakage performance. For applications sensitive to reverse leakage current, the 1N4004G is the preferred selection.

Q: Are the packaging differences between cut tape, tape and box, and tape and reel significant for circuit design?

A: Packaging format differences (CT, TB, TR) affect manufacturing and assembly processes but do not impact electrical performance or circuit functionality. Selection should be based on assembly equipment compatibility and inventory management requirements. All formats maintain identical through-hole axial package dimensions.

Q: What is the significance of the SUPERECTIFIER® designation on certain 1N4004 variants?

A: The SUPERECTIFIER® designation indicates Vishay's optimized rectifier design within the 1N4004 family. Parts bearing this designation (1N4004GP-E3/54, 1N4004GP-E3/73, 1N4004GP-TP) feature improved performance characteristics including lower capacitance (8 pF versus 15 pF) and extended temperature range to 175°C. These variants are preferred for applications requiring enhanced performance within the 1N4004 family.

Q: Can the EG1 be used in automotive applications?

A: The EG1 does not carry automotive qualification. For automotive applications, the 1N4004G (Rectron USA) is the appropriate substitute, as it carries AEC-Q101 qualification and automotive grade designation.

Q: What inventory considerations should guide substitute part selection?

A: The 1N4004GP-E3/54 offers the highest inventory availability (40,609 units), providing supply chain security. The 1N4004G-T (Diodes Incorporated) also maintains substantial inventory (23,750 units). Parts marked "Last Time Buy" or "Not For New Designs" should be avoided for new designs due to limited future availability.

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