DL4004-TP Equivalent & Substitute Parts

Part Overview

The DL4004-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount MELF (DO-213AB) package. This component is classified as obsolete, indicating it is no longer in active production. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and redesign activities for legacy systems utilizing this diode.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Mounting Type	Surface Mount	—
Package / Case	DO-213AB, MELF	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DL4004-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Surface Mount
Package compatibility: DO-213AB (MELF) or equivalent surface mount packages

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics within acceptable operating ranges
Recovery speed classification (Standard or Fast Recovery acceptable)
Reverse leakage current specifications
Operating temperature range sufficient for application requirements
RoHS and regulatory compliance status

Substitute parts are grouped into two categories:

Category 1: Direct Package Equivalents (DO-213AB MELF) Parts maintaining identical or mechanically compatible packaging: BYM12-400-E3/96, BYM12-400-E3/97, EGL41G-E3/96, EGL41G-E3/97, EGL41G/1, RGL41G/1

Category 2: Alternative Package Equivalents (DO-214AC SMA) Parts with different surface mount package but equivalent electrical ratings: GS1G-LTP

Category 3: Reduced Current Rating Parts with lower current capacity unsuitable for direct substitution: 1N6662US (500 mA)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Package	Tj Range [°C]	Product Status	RoHS
DL4004-TP	Micro Commercial Co	400	1	1.1 @ 1A	Standard >500ns	DO-213AB MELF	-65 ~ 150	Obsolete	ROHS3
GS1G-LTP	Micro Commercial Co	400	1	1.0 @ 1A	Standard >500ns	DO-214AC SMA	-55 ~ 150	Not For New Designs	ROHS3
1N5616US	Microchip Technology	400	1	1.3 @ 3A	Standard >500ns	SQ-MELF A	-65 ~ 200	Active	Non-compliant
1N5617US	Microchip Technology	400	1	1.6 @ 3A	Fast ≤500ns	SQ-MELF A	-65 ~ 175	Active	Non-compliant
1N6662US	Microchip Technology	400	0.5	1.0 @ 400mA	Standard >500ns	SQ-MELF A	-65 ~ 175	Active	Non-compliant
BYM12-400-E3/96	Vishay General Semiconductor	400	1	1.25 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	ROHS3
BYM12-400-E3/97	Vishay General Semiconductor	400	1	1.25 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	ROHS3
EGL41G-E3/96	Vishay General Semiconductor	400	1	1.25 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	ROHS3
EGL41G-E3/97	Vishay General Semiconductor	400	1	1.25 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	ROHS3
EGL41G/1	Vishay General Semiconductor	400	1	1.25 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	ROHS3
RGL41G/1	Vishay General Semiconductor	400	1	1.3 @ 1A	Fast ≤500ns	DO-213AB MELF	-65 ~ 175	Active	Non-compliant

Engineering Selection Recommendations

Preferred Substitutes (Direct Replacement):

The BYM12-400-E3/96, BYM12-400-E3/97, EGL41G-E3/96, EGL41G-E3/97, EGL41G/1, and RGL41G/1 are all manufactured by Vishay General Semiconductor and maintain the DO-213AB MELF package identical to the DL4004-TP. These parts satisfy all primary electrical requirements: 400 V reverse voltage rating, 1 A average rectified current, and surface mount configuration.

BYM12-400-E3/96, BYM12-400-E3/97, EGL41G-E3/96, EGL41G-E3/97, and EGL41G/1 are ROHS3 compliant and carry Active product status, making them suitable for new designs and ongoing production. The BYM12 and EGL41G series feature fast recovery characteristics (≤500 ns) with 50 ns reverse recovery time, compared to the standard recovery (>500 ns) of the original DL4004-TP.

RGL41G/1 is also Active status with identical package and electrical ratings but carries RoHS non-compliant status and exhibits 150 ns reverse recovery time.

Alternative Package Substitute:

GS1G-LTP, manufactured by Micro Commercial Co, provides electrical equivalence with 400 V reverse voltage and 1 A current rating but utilizes a DO-214AC (SMA) surface mount package instead of MELF. This part is ROHS3 compliant but carries Not For New Designs status. Package substitution requires PCB layout modification.

Microchip Technology Options:

1N5616US and 1N5617US are Active status parts from Microchip Technology with 400 V and 1 A ratings in SQ-MELF packages. Both carry RoHS non-compliant status. 1N5616US maintains standard recovery characteristics, while 1N5617US features fast recovery (150 ns). These parts require package footprint verification for compatibility.

Not Recommended:

1N6662US is unsuitable as a direct substitute due to reduced current rating of 500 mA, which does not meet the 1 A requirement of the DL4004-TP.

Frequently Asked Questions (FAQ)

Q: Can BYM12-400-E3/96 and BYM12-400-E3/97 be used interchangeably with DL4004-TP?

A: Yes. Both parts maintain identical electrical specifications (400 V, 1 A) and DO-213AB MELF packaging. The primary difference is packaging format: BYM12-400-E3/96 is supplied in Cut Tape & Digi-Reel format, while BYM12-400-E3/97 is supplied in Tape & Reel format. Both are ROHS3 compliant and Active status.

Q: What is the difference between standard recovery and fast recovery diodes?

A: Recovery speed refers to the reverse recovery time (trr). The DL4004-TP specifies standard recovery (>500 ns). Substitute parts with fast recovery (≤500 ns) have shorter reverse recovery times, resulting in reduced switching losses and improved high-frequency performance. Fast recovery substitutes are electrically compatible for applications where the original standard recovery specification is not a limiting constraint.

Q: Is GS1G-LTP a suitable replacement for DL4004-TP?

A: GS1G-LTP provides electrical equivalence with matching 400 V and 1 A ratings and ROHS3 compliance. However, it uses a DO-214AC (SMA) package instead of DO-213AB (MELF), requiring PCB footprint modification. GS1G-LTP carries Not For New Designs status, limiting its use to legacy system support.

Q: Why do some substitutes have higher forward voltage specifications?

A: Forward voltage (Vf) varies with measurement conditions and diode technology. The DL4004-TP specifies 1.1 V @ 1 A, while some substitutes specify 1.25 V or 1.3 V @ 1 A or @ 3 A. These differences reflect different measurement currents and diode construction. Substitutes with higher Vf values remain electrically compatible provided the application circuit tolerates the increased forward voltage drop.

Q: Are Microchip Technology parts (1N5616US, 1N5617US) compatible with DL4004-TP?

A: Both Microchip parts meet the 400 V and 1 A electrical requirements and use SQ-MELF surface mount packages compatible with MELF footprints. However, both carry RoHS non-compliant status, which may restrict use in applications requiring RoHS compliance. Verify regulatory requirements before selection.

Q: What does "Not For New Designs" product status mean?

A: Parts designated "Not For New Designs" are in production but not recommended for incorporation into new product designs. These parts are typically maintained for legacy system support and repair. For new designs, Active status parts such as BYM12-400-E3/96, BYM12-400-E3/97, EGL41G-E3/96, EGL41G-E3/97, or EGL41G/1 are preferred.

Q: Can 1N6662US replace DL4004-TP?

A: No. 1N6662US has a maximum average rectified current of 500 mA, which is insufficient for applications requiring the 1 A rating of DL4004-TP. This part is not suitable as a direct substitute.

Q: What is the significance of RoHS compliance status?

A: ROHS3 compliant parts meet Restriction of Hazardous Substances regulations and are required for applications subject to environmental and regulatory compliance mandates. DL4004-TP is ROHS3 compliant. Preferred substitutes (BYM12-400-E3/96, BYM12-400-E3/97, EGL41G-E3/96, EGL41G-E3/97, EGL41G/1) maintain ROHS3 compliance. Parts with RoHS non-compliant status may be restricted in certain markets or applications.

Q: How do operating temperature ranges affect substitution?

A: DL4004-TP specifies -65°C to 150°C junction temperature range. Most substitutes extend this range to -65°C to 175°C or higher, providing broader operational capability. Substitutes with extended temperature ranges are compatible with DL4004-TP applications and offer additional design margin for temperature-sensitive circuits.

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