DL4002-TP Equivalent & Substitute Parts

Part Overview

The DL4002-TP is a general-purpose rectifier diode rated for 100 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. Identifying 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)	100	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 @ 100 V
Mounting Type	Surface Mount	—
Package / Case	DO-213AB, MELF	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DL4002-TP is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute must support a minimum DC reverse voltage of 100 V. Parts with higher voltage ratings (such as 1000 V) are electrically compatible but represent over-specification for the original application.

Current Rating: The substitute must support a minimum average rectified current of 1 A. Parts with higher current ratings (such as 3 A) are electrically compatible but represent over-specification.

Package Type: The original DL4002-TP uses the DO-213AB (MELF) surface mount package. Substitutes may use alternative surface mount packages (DO-214AC/SMA, SQ-MELF) provided the physical dimensions and PCB footprint compatibility are verified for the specific application.

Recovery Speed: The DL4002-TP specifies standard recovery characteristics (>500 ns). Substitutes with faster recovery speeds (≤500 ns) are electrically compatible and represent an improvement in performance characteristics.

RoHS Compliance: The DL4002-TP is ROHS3 compliant. Substitutes with RoHS non-compliant status may be used in applications where regulatory requirements permit.

Parameter Comparison

Parameter	DL4002-TP	GS1B-LTP	1N5622US	1N5809URS	1N6074US	RGL41B/1
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology	Microchip Technology	Microchip Technology	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	1000 V	100 V	100 V	100 V
Current - Average Rectified (Io)	1 A	1 A	1 A	3 A	3 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1 V @ 1 A	1.3 V @ 3 A	875 mV @ 4 A	2.04 V @ 9.4 A	1.3 V @ 1 A
Speed	Standard Recovery >500ns	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	10 µA @ 100 V	500 nA @ 1000 V	5 µA @ 100 V	1 µA @ 100 V	5 µA @ 100 V
Package / Case	DO-213AB, MELF	DO-214AC, SMA	SQ-MELF, A	SQ-MELF, B	SQ-MELF, A	DO-213AB, MELF
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	Not specified	RoHS non-compliant	RoHS non-compliant
Product Status	Obsolete	Not For New Designs	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Package Match (DO-213AB MELF):

The RGL41B/1 from Vishay General Semiconductor provides the closest physical compatibility with the DL4002-TP, utilizing the same DO-213AB MELF package. This part maintains identical voltage and current ratings (100 V, 1 A) and is currently in active production status. The RGL41B/1 features improved fast recovery characteristics (150 ns) compared to the standard recovery of the original part. RoHS compliance status differs; the RGL41B/1 is RoHS non-compliant.

Same Electrical Ratings, Alternative Package (DO-214AC SMA):

The GS1B-LTP from Micro Commercial Co matches the electrical specifications (100 V, 1 A) and is available in the DO-214AC (SMA) surface mount package. This part is classified as "Not For New Designs" but remains in stock. PCB footprint modification is required for package substitution. The GS1B-LTP is ROHS3 compliant.

Higher Current Ratings (3 A), Same Voltage (100 V):

The 1N5809URS and 1N6074US both provide 100 V reverse voltage with 3 A average rectified current, representing over-specification for the original 1 A application. Both parts feature fast recovery characteristics and are in active production. Package options include SQ-MELF variants. These parts are suitable for applications requiring increased current capacity within the same voltage class.

Higher Voltage Rating (1000 V), Same Current (1 A):

The 1N5622US provides 1000 V reverse voltage with 1 A average rectified current, representing over-specification for the original 100 V application. This part is in active production but is RoHS non-compliant. Selection of this part is appropriate only when higher voltage withstand capability is required.

Product Status Consideration:

The DL4002-TP is obsolete. The GS1B-LTP is classified as "Not For New Designs." For new designs, selection from the active production parts (1N5622US, 1N5809URS, 1N6074US, RGL41B/1) is appropriate based on specific electrical and package requirements.

Frequently Asked Questions (FAQ)

Q: Can the GS1B-LTP directly replace the DL4002-TP on the PCB?

A: The GS1B-LTP uses the DO-214AC (SMA) package, while the DL4002-TP uses DO-213AB (MELF). These packages have different physical dimensions and PCB footprints. PCB layout modification is required for substitution.

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

A: Recovery speed refers to the time required for the diode to transition from conducting to blocking state. The DL4002-TP specifies standard recovery (>500 ns). Fast recovery diodes (≤500 ns) transition more quickly, reducing switching losses in high-frequency applications. Fast recovery substitutes are electrically compatible with standard recovery specifications.

Q: Can I use the 1N5809URS (3 A) in place of the DL4002-TP (1 A)?

A: Yes. The 1N5809URS has identical voltage rating (100 V) and exceeds the current requirement (3 A vs. 1 A). Higher current-rated diodes are electrically compatible with lower current applications. Verify package compatibility (SQ-MELF vs. DO-213AB MELF) for PCB fit.

Q: Why is the 1N5622US rated for 1000 V when the DL4002-TP is only 100 V?

A: The 1N5622US is designed for higher voltage applications. It is electrically compatible with 100 V circuits but represents over-specification. Use this part only when the application requires higher voltage withstand capability.

Q: What does RoHS compliance mean for diode selection?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the part does not contain restricted materials such as lead. ROHS3 compliant parts meet current regulatory requirements. RoHS non-compliant parts may be used in applications where regulatory requirements permit or in legacy system repairs.

Q: Is the RGL41B/1 a direct replacement for the DL4002-TP?

A: The RGL41B/1 uses the same DO-213AB MELF package and matches the electrical ratings (100 V, 1 A). It is a direct physical and electrical replacement. The RGL41B/1 is in active production, whereas the DL4002-TP is obsolete.

Q: What should I consider when choosing between substitute parts?

A: Prioritize the following factors in order: (1) voltage and current ratings must meet or exceed application requirements, (2) package type must be compatible with PCB layout or allow for modification, (3) product status (active vs. obsolete/not for new designs), (4) compliance certifications (RoHS, REACH) required by your application, (5) recovery speed characteristics for switching performance.

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