SDUR1040CT Equivalent & Substitute Parts

Part Overview

The SDUR1040CT 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 TO-220-3 through-hole package and is designed for fast recovery applications. The part maintains Active product status with 738 units in current inventory stock.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

SDUR1040CT

SMC Diode SolutionsIn Stock: 799SDUR1040CT Datasheet

Current PartRFQ

DUR1040CT

Littelfuse Inc.In Stock: 1923DUR1040CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDUR1040CT is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Voltage - DC Reverse (Vr) (Max): 400 V
• Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 5 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 45 ns
• Operating Temperature - Junction: -55°C to 150°C
• Package / Case: TO-220-3
• Mounting Type: Through Hole

The DUR1040CT manufactured by Littelfuse Inc. satisfies all critical matching parameters and qualifies as a parametric equivalent substitute for the SDUR1040CT.

Parameter Comparison

Engineering Selection Recommendations

SDUR1040CT (Primary Part) The SDUR1040CT maintains Active product status with established supply availability (738 units in stock). This part is ROHS3 Compliant and REACH Affected, meeting current environmental and regulatory requirements for industrial applications.

DUR1040CT (Substitute Part) The DUR1040CT is a parametric equivalent manufactured by Littelfuse Inc., also maintaining Active product status with higher inventory availability (1,877 units in stock). This substitute meets all critical electrical and mechanical specifications required for direct replacement. The DUR1040CT is ROHS3 Compliant and REACH Unaffected, providing an alternative compliance profile.

Both parts are suitable for selection based on availability, supply chain requirements, and regulatory compliance needs. The choice between primary and substitute parts should be determined by procurement constraints and application-specific compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the DUR1040CT replace the SDUR1040CT in existing circuit designs?

A: Yes. The DUR1040CT satisfies all critical electrical parameters including reverse voltage rating (400 V), forward voltage characteristics (1.3 V @ 5 A), recovery time specifications (45 ns), and thermal operating range (-55°C to 150°C). Both parts use identical TO-220-3 through-hole packaging, enabling direct mechanical and electrical substitution.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer identity and reverse leakage current measurement conditions. The SDUR1040CT specifies reverse leakage at 400 V, while the DUR1040CT specifies this parameter at 100 V. Both parts maintain identical forward voltage and recovery time characteristics. Inventory levels differ, with the DUR1040CT offering higher stock availability.

Q: Are both parts compliant with current environmental regulations?

A: Both the SDUR1040CT and DUR1040CT are ROHS3 Compliant. The SDUR1040CT is REACH Affected, while the DUR1040CT is REACH Unaffected. Selection should account for specific regulatory requirements applicable to the end application and geographic market.

Q: Does the TO-220-3 package ensure mechanical compatibility?

A: Yes. Both parts use the TO-220-3 through-hole package with identical pin configuration and thermal characteristics. PCB layout, mounting hardware, and thermal management designs require no modification when substituting between these parts.

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

A: This configuration indicates the diode array contains two diodes sharing a common cathode terminal. The TO-220-3 package provides three leads: two anodes and one common cathode. This configuration is identical between the SDUR1040CT and DUR1040CT, ensuring functional equivalence in bridge rectifier and dual-diode applications.