DGS19-025AS Equivalent & Substitute Parts

Part Overview

The DGS19-025AS is a Schottky diode rated for 250 V DC reverse voltage and 18 A average rectified current in a surface mount TO-252AA package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain functional compatibility across critical electrical parameters and mechanical form factors.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	250	V
Current - Average Rectified (Io)	18	A
Voltage - Forward (Vf) (Max) @ If	1.5 @ 7.5	V @ A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	2	mA @ 250 V
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitute parts for the DGS19-025AS are identified based on the following critical parameters:

Mechanical Compatibility: Package type must be TO-252-3 DPAK (2 Leads + Tab) to ensure direct footprint compatibility on existing printed circuit boards.

Electrical Compatibility: Substitute parts must satisfy the following conditions:

Voltage - DC Reverse (Vr) rating equal to or greater than 250 V
Current - Average Rectified (Io) rating equal to or greater than 18 A
Speed classification of Fast Recovery (≤ 500ns, > 200mA)
Operating temperature range encompassing -55°C to 175°C junction temperature

Functional Equivalence: Parts must operate as rectifying diodes in the same application context, with forward voltage characteristics suitable for the intended circuit topology.

The SDURD1530 meets these substitution criteria through equivalent package geometry, compatible electrical ratings, and matching thermal specifications.

Parameter Comparison

Parameter	DGS19-025AS (Main Part)	SDURD1530 (Substitute)	Compatibility
Voltage - DC Reverse (Vr) (Max)	250 V	300 V	Substitute exceeds requirement
Current - Average Rectified (Io)	18 A	15 A	Substitute below requirement
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 7.5 A	1.26 V @ 15 A	Different test conditions
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Equivalent
Current - Reverse Leakage @ Vr	2 mA @ 250 V	10 µA @ 300 V	Different test conditions
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	Equivalent
Operating Temperature - Junction	-55 to 175°C	-55 to 175°C	Equivalent
Technology	Schottky	Standard	Different technology
Product Status	Obsolete	Active	Substitute is current production

Engineering Selection Recommendations

Product Status Consideration: The DGS19-025AS is classified as obsolete. The SDURD1530 is an active product with current manufacturing status, ensuring long-term availability and supply chain continuity.

Compliance and Certifications: The SDURD1530 carries RoHS3 compliance certification, whereas the DGS19-025AS compliance status is not specified in the provided data. Both parts are classified under ECCN EAR99 and share the same HTSUS code (8541.10.0080).

Moisture Sensitivity: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Current Rating Differential: The SDURD1530 is rated for 15 A average rectified current, which is 3 A below the DGS19-025AS specification of 18 A. Circuit designs operating at or near the 18 A maximum rating of the original part require evaluation to confirm operation within the 15 A limit of the substitute.

Voltage Rating: The SDURD1530 provides 300 V reverse voltage rating, exceeding the 250 V requirement of the DGS19-025AS, offering additional design margin in high-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can the SDURD1530 directly replace the DGS19-025AS in all applications?

A: Direct replacement is possible only in applications where the circuit current requirement does not exceed 15 A. The SDURD1530 is rated for 15 A average rectified current, compared to the DGS19-025AS rating of 18 A. Applications operating at 15 A or below are compatible. Applications requiring the full 18 A capacity require alternative solutions.

Q: Are the package dimensions identical between these parts?

A: Both parts use the TO-252-3 DPAK (2 Leads + Tab) package, designated SC-63. Footprint compatibility is confirmed for printed circuit board layouts designed for either part.

Q: What is the difference between Schottky and Standard diode technology in this comparison?

A: The DGS19-025AS uses Schottky technology, while the SDURD1530 uses Standard diode technology. Both are classified as Fast Recovery devices with recovery times ≤ 500ns. The technology difference affects forward voltage characteristics and reverse leakage behavior at specified test conditions.

Q: Are there supply chain advantages to using the SDURD1530?

A: The SDURD1530 is classified as an active product with current manufacturing status. The DGS19-025AS is obsolete. Active product status provides improved long-term availability and procurement reliability.

Q: What is the impact of the different reverse leakage specifications?

A: The DGS19-025AS specifies 2 mA reverse leakage at 250 V, while the SDURD1530 specifies 10 µA at 300 V. These measurements are taken at different voltage levels, making direct comparison inappropriate. Leakage behavior at the actual operating voltage of the application circuit determines practical impact.

Q: Do both parts require the same PCB layout considerations?

A: Yes. Both parts use identical TO-252-3 DPAK packages with the same lead configuration and thermal tab design. PCB layout, thermal management, and soldering procedures designed for one part apply directly to the other.

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