DL4001-TP Equivalent & Substitute Parts

Part Overview

The DL4001-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 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 legacy system support where the original component is no longer readily available through standard distribution channels.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	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 @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-213AB, MELF	—
Operating Temperature - Junction	-65°C ~ 150°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DL4001-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed the original specification to maintain circuit performance
Speed classification: Must support the same recovery speed category or faster
Operating Temperature - Junction: Must encompass or exceed the original range

Mechanical Compatibility Criteria:

Mounting Type: Must be Surface Mount
Package / Case: Must be compatible with the original MELF footprint or an equivalent surface mount package that fits the PCB layout

Compliance Criteria:

RoHS Status: Must maintain ROHS3 compliance
Moisture Sensitivity Level (MSL): Must be rated 1 (Unlimited) or equivalent

Substitute parts are grouped into two categories: Direct Package Equivalents (same MELF package) and Alternative Package Equivalents (different surface mount packages with electrical parameter compatibility).

Parameter Comparison

Parameter	DL4001-TP	GS1A-LTP	1N5807URS	1N6073US
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology	Microchip Technology
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	1 A	1 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1 V @ 1 A	875 mV @ 4 A	2.04 V @ 9.4 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 50 V	10 µA @ 50 V	5 µA @ 50 V	1 µA @ 50 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-213AB, MELF	DO-214AC, SMA	SQ-MELF, B	SQ-MELF, A
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 155°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	RoHS non-compliant
Product Status	Obsolete	Not For New Designs	Active	Active

Engineering Selection Recommendations

GS1A-LTP (Micro Commercial Co)

The GS1A-LTP is the closest electrical equivalent to the DL4001-TP, matching the 50 V reverse voltage and 1 A current rating. Both components are manufactured by Micro Commercial Co and maintain ROHS3 compliance. The GS1A-LTP is packaged in DO-214AC (SMA), a different surface mount package than the original MELF. This substitute is suitable for applications where PCB layout can accommodate the SMA footprint. The product status is "Not For New Designs," indicating limited future availability.

1N5807URS (Microchip Technology)

The 1N5807URS provides higher current capacity (3 A) while maintaining the 50 V reverse voltage specification. This component features fast recovery characteristics (≤500ns) compared to the standard recovery of the original part. The operating temperature range extends to 175°C, exceeding the original specification. The SQ-MELF package is a variant of the MELF family. This substitute is suitable for applications requiring higher current handling or improved high-frequency performance. Product status is Active, ensuring long-term availability.

1N6073US (Microchip Technology)

The 1N6073US also provides 3 A current capacity at 50 V reverse voltage with fast recovery characteristics. This component exhibits superior reverse leakage performance (1 µA @ 50 V). However, the RoHS status is non-compliant, making this substitute unsuitable for applications requiring RoHS compliance. The D-5A package is a surface mount variant. This substitute is applicable only in legacy systems where RoHS compliance is not a requirement.

Frequently Asked Questions (FAQ)

Q: Can the GS1A-LTP directly replace the DL4001-TP on the same PCB?

A: The GS1A-LTP has identical electrical ratings (50 V, 1 A) but uses a different package (DO-214AC/SMA instead of DO-213AB/MELF). Direct PCB replacement requires verification that the SMA footprint is compatible with the existing MELF pad layout. Footprint conversion may be necessary.

Q: Why are the 1N5807URS and 1N6073US rated for 3 A when the original part is 1 A?

A: Higher current ratings indicate greater current-handling capacity. These parts are electrically compatible with 1 A circuits because they can safely operate at or below the original current specification. The higher rating provides design margin and allows use in higher-current applications.

Q: What is the difference between Standard Recovery and Fast Recovery?

A: Recovery speed refers to the time required for the diode to transition from conducting to blocking state. Standard Recovery (>500ns) is suitable for low-frequency and DC applications. Fast Recovery (≤500ns) is required for high-frequency switching applications. The DL4001-TP uses Standard Recovery; substitutes with Fast Recovery are backward-compatible for Standard Recovery applications.

Q: Is the 1N6073US suitable for new designs?

A: No. The 1N6073US is RoHS non-compliant, which disqualifies it from most modern applications and regulatory environments. For new designs, the 1N5807URS (Active, RoHS compliant) is the recommended choice.

Q: What does "Not For New Designs" mean for the GS1A-LTP?

A: This status indicates the manufacturer is not recommending the part for new circuit designs and may discontinue production. While suitable for legacy system support and repairs, the 1N5807URS is preferred for new applications due to its Active status and assured long-term availability.

Q: How do I verify package compatibility before substitution?

A: Obtain the PCB footprint specifications for both the original MELF package and the substitute package. Compare pad dimensions, spacing, and orientation. Consult the component datasheets for detailed package drawings. Physical sample verification is recommended before production implementation.

Q: Are all substitute parts RoHS compliant?

A: No. The 1N6073US is RoHS non-compliant. The GS1A-LTP and 1N5807URS are both ROHS3 compliant. Verify RoHS compliance requirements for your application before selecting a substitute.

Q: Can I use a 3 A diode in a circuit designed for 1 A?

A: Yes. A higher-rated component can safely operate at lower current levels. However, verify that other circuit parameters (forward voltage drop, reverse leakage, recovery time) are compatible with the original design specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message