DL4002 Equivalent & Substitute Parts Reference

Part Overview

The DL4002 is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount MELF (DO-213AB) package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The DL4002 operates with standard recovery characteristics (>500 ns) and is suitable for general rectification applications requiring moderate voltage and current ratings.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	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 @ 100 V
Mounting Type	Surface Mount	-
Package / Case	DO-213AB, MELF	-
Product Status	Obsolete	-
RoHS Status	RoHS non-compliant	-

Substitute Part Grouping Explanation

Substitute parts for the DL4002 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Must be Surface Mount
Package / Case: Must be compatible with DO-213AB or MELF form factor

Grouping Logic:

Group 1: Direct Electrical & Package Equivalents (100 V, 1 A, DO-213AB MELF) These parts match the DL4002 electrical specifications and package exactly. They serve as direct replacements with identical voltage and current ratings.

Group 2: Higher Current Capability (100 V, 3 A, Surface Mount MELF) These parts maintain the 100 V voltage rating but provide increased current capacity (3 A vs. 1 A). They are electrically compatible for applications where the DL4002 is used, as they can handle the same voltage with additional current margin.

Group 3: Higher Voltage Capability (1000 V, 1 A, Surface Mount) This part exceeds the voltage rating significantly while maintaining 1 A current. It is electrically compatible for applications requiring higher voltage withstand capability.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	Speed	Package	Product Status	RoHS Status
DL4002	Micro Commercial Co	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Obsolete	Non-compliant
1N6479-E3/96	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
1N6479-E3/97	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
1N6479HE3/96	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
1N6479HE3/97	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
BYM10-100-E3/96	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
BYM10-100HE3/96	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
BYM10-100HE3/97	Vishay	100	1	1.1 @ 1 A	Standard >500ns	DO-213AB, MELF	Active	ROHS3 Compliant
1N5809URS	Microchip Technology	100	3	0.875 @ 4 A	Fast ≤500ns	SQ-MELF, B	Active	Non-compliant
1N6074US	Microchip Technology	100	3	2.04 @ 9.4 A	Fast ≤500ns	SQ-MELF, A	Active	Non-compliant
1N5622US	Microchip Technology	1000	1	1.3 @ 3 A	Standard >500ns	SQ-MELF, A	Active	Non-compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical & Package Specifications):

The Vishay SUPERECTIFIER® series parts (1N6479-E3/96, 1N6479-E3/97, 1N6479HE3/96, 1N6479HE3/97, BYM10-100-E3/96, BYM10-100HE3/96, BYM10-100HE3/97) provide pin-for-pin and electrically equivalent substitutes for the obsolete DL4002. All these parts maintain 100 V reverse voltage, 1 A average rectified current, and DO-213AB MELF packaging. These parts are in active production status and carry ROHS3 compliance certification, addressing both obsolescence and regulatory requirements.

For Higher Current Applications (100 V, 3 A):

The 1N5809URS (Microchip Technology) and 1N6074US (Microchip Technology) provide increased current capacity at the same 100 V voltage rating. These parts are suitable for applications where the DL4002 operates below its 1 A maximum rating and additional current margin is beneficial. Both parts use surface mount MELF-based packages (SQ-MELF) and are in active production.

For Higher Voltage Applications (1000 V, 1 A):

The 1N5622US (Microchip Technology) maintains the 1 A current rating while providing 10× voltage capability (1000 V vs. 100 V). This part is suitable for applications requiring higher voltage withstand capability while maintaining the same current specification.

Compliance Considerations:

The DL4002 is RoHS non-compliant. For new designs or production requiring RoHS compliance, select from the Vishay SUPERECTIFIER® series (1N6479 or BYM10 variants), which carry ROHS3 certification. The Microchip alternatives (1N5809URS, 1N6074US, 1N5622US) are RoHS non-compliant and should be selected only when compliance is not a requirement.

Frequently Asked Questions (FAQ)

Q: Can I use 1N6479-E3/96 as a direct replacement for DL4002?

A: Yes. The 1N6479-E3/96 matches the DL4002 in all critical electrical parameters (100 V, 1 A) and package type (DO-213AB MELF). It is pin-compatible and electrically equivalent. The primary advantage is that 1N6479-E3/96 is in active production and ROHS3 compliant, whereas DL4002 is obsolete and RoHS non-compliant.

Q: What is the difference between 1N6479-E3/96 and BYM10-100-E3/96?

A: Both parts have identical electrical specifications (100 V, 1 A, 1.1 V forward voltage) and the same DO-213AB MELF package. The primary difference is the technology designation: 1N6479 is standard technology, while BYM10 is avalanche technology. Both are ROHS3 compliant and in active production. Selection between them depends on design requirements for avalanche capability.

Q: Can I use 1N5809URS (3 A) instead of DL4002 (1 A)?

A: Yes, electrically. The 1N5809URS maintains the 100 V voltage rating and provides 3 A current capacity, which exceeds the DL4002 requirement. However, the package differs: 1N5809URS uses SQ-MELF B package while DL4002 uses DO-213AB MELF. Physical board layout compatibility must be verified before substitution.

Q: Is 1N5622US (1000 V) compatible with DL4002 (100 V) applications?

A: Yes, electrically. The 1N5622US exceeds the voltage rating (1000 V vs. 100 V) and maintains 1 A current capacity. It is suitable for applications where higher voltage withstand is beneficial or required. The package differs (SQ-MELF A vs. DO-213AB MELF), requiring physical layout verification.

Q: Why do some part numbers have -E3/96 or -E3/97 suffixes?

A: These suffixes indicate manufacturing date codes and packaging configurations. -E3/96 and -E3/97 represent different manufacturing periods. Both variants are electrically and functionally identical and can be used interchangeably for the same application.

Q: Should I select a RoHS compliant substitute?

A: If your application or end-market requires RoHS compliance, select from the Vishay SUPERECTIFIER® series (1N6479 or BYM10 variants), which carry ROHS3 certification. If RoHS compliance is not required, other alternatives are available. Verify compliance requirements with your design specifications and customer requirements.

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

A: The DL4002 uses standard recovery (>500 ns), while alternatives like 1N5809URS use fast recovery (≤500 ns). Standard recovery diodes have longer reverse recovery time, which is acceptable for general rectification. Fast recovery diodes switch faster and generate less switching noise, beneficial in high-frequency applications. For direct replacement of DL4002, standard recovery parts are preferred.

Q: Can I mix different substitute parts in the same circuit?

A: Yes, provided all selected parts meet the circuit's electrical requirements (voltage, current, recovery speed). However, for consistency and simplified inventory management, using a single part number across a design is recommended.

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