DGSK36-03CS Equivalent & Substitute Parts

Part Overview

The DGSK36-03CS is a Schottky diode array manufactured by IXYS, configured as a 1 Pair Common Cathode arrangement rated for 300 V DC reverse voltage and 29 A average rectified current per diode. The component is housed in a TO-263-3 D2PAK surface mount package with two leads and a tab. This part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

DGSK36-03CS

IXYSIn Stock: 956DGSK36-03CS Datasheet

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SBR20A300CTB

Diodes IncorporatedIn Stock: 3476SBR20A300CTB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DGSK36-03CS is determined by the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Voltage - DC Reverse (Vr) (Max): 300 V
• Mounting Type: Surface Mount

Performance Parameters Requiring Compatibility:

• Current - Average Rectified (Io) (per Diode): Substitute must support the application's current requirements
• Voltage - Forward (Vf) (Max): Lower forward voltage reduces power dissipation
• Reverse Recovery Time (trr): Faster recovery improves switching performance
• Current - Reverse Leakage @ Vr: Lower leakage improves efficiency

The SBR20A300CTB from Diodes Incorporated meets the mandatory matching parameters for package, voltage rating, configuration, and mounting type. However, the current rating differs, requiring application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The SBR20A300CTB is an active product from Diodes Incorporated with ROHS3 compliance, addressing the obsolescence of the DGSK36-03CS. Both components share identical package geometry (TO-263-3, D2PAK), voltage rating (300 V), and diode configuration (1 Pair Common Cathode), enabling direct physical and electrical substitution within the same PCB footprint.

The SBR20A300CTB incorporates Super Barrier technology, delivering superior forward voltage characteristics (920 mV @ 10 A versus 1.9 V @ 7.5 A), resulting in reduced power dissipation and improved thermal performance. The lower reverse leakage current (100 µA versus 250 µA @ 300 V) enhances efficiency in low-current standby conditions.

The primary design consideration is the current rating differential: the SBR20A300CTB is rated for 10 A average rectified current per diode, compared to the DGSK36-03CS at 29 A. Substitution is valid only for applications where the peak and average current demands do not exceed 10 A per diode. Applications requiring sustained currents above 10 A per diode require alternative component selection.

The SBR20A300CTB operates across an extended lower temperature range (-65°C versus -55°C), providing additional margin in cold-temperature environments. Both components maintain identical upper junction temperature limits (175°C).

Frequently Asked Questions (FAQ)

Q: Can the SBR20A300CTB directly replace the DGSK36-03CS in existing designs?

A: Direct physical replacement is possible due to identical package geometry (TO-263-3, D2PAK). Electrical compatibility requires verification that application current demands do not exceed 10 A per diode. The SBR20A300CTB's lower forward voltage and reverse leakage provide performance improvements in compatible applications.

Q: What is the significance of the current rating difference between these components?

A: The DGSK36-03CS supports 29 A average rectified current per diode, while the SBR20A300CTB supports 10 A. The substitute is suitable only for applications operating within the 10 A per diode limit. Exceeding this rating results in thermal stress and reduced component reliability.

Q: Are there package compatibility concerns?

A: Both components use the TO-263-3 D2PAK package with identical pinout and thermal tab configuration. PCB footprints are directly compatible without modification.

Q: How do the forward voltage characteristics compare?

A: The SBR20A300CTB exhibits significantly lower forward voltage (920 mV @ 10 A) compared to the DGSK36-03CS (1.9 V @ 7.5 A). This reduction decreases power dissipation and improves overall circuit efficiency, particularly in high-frequency switching applications.

Q: What compliance advantages does the SBR20A300CTB offer?

A: The SBR20A300CTB is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability. The DGSK36-03CS is classified as obsolete, making the SBR20A300CTB the preferred choice for new designs and ongoing production.

Q: Are there temperature range considerations?

A: The SBR20A300CTB operates from -65°C to 175°C, providing 10°C additional margin at the lower temperature extreme compared to the DGSK36-03CS (-55°C to 175°C). Both components share the same upper temperature limit.

Q: How do reverse recovery times affect circuit performance?

A: The DGSK36-03CS exhibits faster reverse recovery (23 ns versus 35 ns). In applications sensitive to switching transients, the slightly longer recovery time of the SBR20A300CTB may require evaluation of switching frequency and EMI characteristics.