SBG2040CT Equivalent & Substitute Parts

Part Overview

The SBG2040CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 40 V and average rectified current of 20 A per diode. The device is packaged in TO-263-3 (D2PAK) surface mount configuration. This part is discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain functional compatibility while meeting current procurement requirements.

Substiute Parts

SBG2040CT

Diodes IncorporatedIn Stock: 3049SBG2040CT Datasheet

Current PartRFQ

STPS41L45CG-TR

STMicroelectronicsIn Stock: 4153STPS41L45CG-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SBG2040CT is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Mounting Type: Surface Mount
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Current - Average Rectified (Io) (per Diode): 20 A minimum

Allowable Parameter Variations:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 40 V
• Voltage - Forward (Vf) (Max) @ If: Equal to or lower than 550 mV @ 10 A
• Current - Reverse Leakage @ Vr: Equal to or lower than 1 mA @ 40 V
• Operating Temperature - Junction: Maximum rating equal to or greater than 150°C

The STPS41L45CG-TR from STMicroelectronics meets all mandatory compatibility criteria and operates within allowable parameter variations, qualifying it as a direct substitute for the SBG2040CT.

Parameter Comparison

Engineering Selection Recommendations

The STPS41L45CG-TR is a qualified substitute for the SBG2040CT based on the following factors:

Electrical Compatibility: The STPS41L45CG-TR maintains identical diode configuration, current rating, and switching speed characteristics. The 45 V reverse voltage rating exceeds the 40 V requirement of the original part, providing additional voltage margin. Forward voltage performance is equivalent or superior across the specified operating range.

Package Compatibility: Both parts utilize identical TO-263-3 D2PAK surface mount packaging, ensuring direct PCB footprint compatibility without layout modifications.

Compliance Status: The STPS41L45CG-TR is ROHS3 compliant, whereas the SBG2040CT is RoHS non-compliant. Organizations subject to RoHS regulations should prioritize the STPS41L45CG-TR for new designs and procurement.

Availability: The STPS41L45CG-TR is currently active in production with 4100 units in stock, compared to the discontinued status of the SBG2040CT.

Temperature Performance: Both parts support identical maximum junction temperature ratings of 150°C, ensuring thermal compatibility in existing thermal management designs.

Frequently Asked Questions (FAQ)

Q: Can the STPS41L45CG-TR be used as a direct replacement for the SBG2040CT without PCB modifications?

A: Yes. Both parts share identical TO-263-3 D2PAK packaging with the same pinout configuration (2 leads + tab). No PCB layout changes are required for substitution.

Q: What is the significance of the 45 V rating on the STPS41L45CG-TR compared to the 40 V rating on the SBG2040CT?

A: The higher reverse voltage rating on the STPS41L45CG-TR provides additional design margin and allows operation in circuits with higher transient voltage spikes. This represents an improvement over the original specification and does not create compatibility issues.

Q: Are there any thermal considerations when substituting these parts?

A: Both parts support identical maximum junction temperature ratings of 150°C. Existing thermal management designs, including heatsinking and PCB copper area, remain valid for the substitute part.

Q: How do the forward voltage characteristics compare between these two parts?

A: The STPS41L45CG-TR exhibits a forward voltage of 530 mV @ 20 A, compared to 550 mV @ 10 A for the SBG2040CT. The substitute part demonstrates lower forward voltage drop at higher current levels, resulting in reduced power dissipation.

Q: What is the impact of the RoHS compliance difference?

A: The STPS41L45CG-TR is ROHS3 compliant, while the SBG2040CT is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the STPS41L45CG-TR is the appropriate selection.

Q: Are the reverse leakage characteristics acceptable for the substitution?

A: The STPS41L45CG-TR exhibits 1.2 mA reverse leakage @ 45 V compared to 1 mA @ 40 V for the SBG2040CT. This minor increase in leakage current is within acceptable limits for Schottky diode applications and does not impact circuit functionality.

Q: What is the moisture sensitivity level for both parts?

A: Both the SBG2040CT and STPS41L45CG-TR are rated MSL 1 (Unlimited), indicating no moisture sensitivity concerns. Standard handling and storage procedures apply to both components.