SDURB1540CT Equivalent & Substitute Parts

Part Overview

The SDURB1540CT is a general-purpose diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode rectifier with a maximum reverse voltage rating of 400 V. This component is housed in a Surface Mount TO-263-3 D2PAK package and is classified as Active product status. The device is suitable for applications requiring fast recovery rectification in compact form factors. Substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

SDURB1540CT

SMC Diode SolutionsIn Stock: 1915SDURB1540CT Datasheet

Current PartRFQ

DURB1640CT

Littelfuse Inc.In Stock: 1489DURB1640CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDURB1540CT are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Primary Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Voltage - DC Reverse (Vr) (Max): 400 V
• Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 8 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 45 ns
• Current - Reverse Leakage @ Vr: 10 µA @ 400 V
• Operating Temperature - Junction: -55°C to 150°C
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The DURB1640CT from Littelfuse Inc. meets all specified electrical and mechanical parameters and is therefore classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

SDURB1540CT (Primary Part)

The SDURB1540CT is the original specified component and maintains Active product status with 1807 units in stock. This part is ROHS3 Compliant and REACH Affected. Selection of the primary part is appropriate when SMC Diode Solutions inventory and supply chain continuity are prioritized.

DURB1640CT (Substitute Part)

The DURB1640CT from Littelfuse Inc. is a parametric equivalent substitute that satisfies all electrical and mechanical requirements. This part is also Active product status with 1447 units in stock, ROHS3 Compliant, and REACH Unaffected. The substitute part is suitable for applications where Littelfuse supply chain preference, inventory availability, or REACH compliance status is a selection criterion. Both parts are functionally interchangeable within the specified electrical and thermal operating ranges.

Frequently Asked Questions (FAQ)

Q: Can the DURB1640CT replace the SDURB1540CT in existing designs?

A: Yes. The DURB1640CT meets all specified electrical parameters including reverse voltage rating (400 V), forward voltage drop (1.3 V @ 8 A), reverse recovery time (45 ns), and reverse leakage current (10 µA @ 400 V). Both parts share identical package specifications (TO-263-3, D2PAK) and mounting type (Surface Mount), enabling direct substitution without circuit board redesign.

Q: Are there differences in compliance or regulatory status between these parts?

A: Both parts are ROHS3 Compliant and rated for Moisture Sensitivity Level 1 (Unlimited). The SDURB1540CT is REACH Affected, while the DURB1640CT is REACH Unaffected. Applications subject to REACH restrictions may require the DURB1640CT. Both parts carry EAR99 ECCN classification and identical HTSUS codes (8541.10.0080).

Q: What is the significance of the 1 Pair Common Cathode configuration?

A: This configuration indicates the diode array contains two diodes with a shared cathode terminal. The common cathode connection is a fixed design characteristic and must be matched in any substitute part. Both the SDURB1540CT and DURB1640CT maintain this identical configuration.

Q: Are the thermal operating ranges identical?

A: Yes. Both parts operate across the junction temperature range of -55°C to 150°C, ensuring equivalent thermal performance in the specified operating environment.

Q: What is the difference between the two parts' current specifications?

A: The SDURB1540CT does not specify Current - Average Rectified (Io) in the provided data, while the DURB1640CT explicitly specifies 8 A per diode. Both parts are rated for 1.3 V forward voltage drop at 8 A, indicating functional equivalence at this current level.

Q: Can these parts be used interchangeably on the same printed circuit board?

A: Yes. Both parts use identical Surface Mount packaging (TO-263-3, D2PAK with 2 Leads + Tab) and footprint specifications, enabling direct board-level substitution without layout modifications.