CUD10-04 BK Equivalent & Substitute Parts

Part Overview

The CUD10-04 BK is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 400 V DC reverse voltage and 10 A average rectified current in a surface mount DPAK package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. The CUD10-04 BK operates across a junction temperature range of -65°C to 150°C and meets ROHS3 compliance requirements.

Substiute Parts

CUD10-04 BK

Central Semiconductor CorpIn Stock: 910CUD10-04 BK Datasheet

Current PartRFQ

SDURD1060

SMC Diode SolutionsIn Stock: 2498SDURD1060 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CUD10-04 BK is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Package / Case: TO-252-3 DPAK (2 Leads + Tab) - physical and electrical interface requirement
• Mounting Type: Surface Mount - assembly process compatibility
• Current - Average Rectified (Io): 10 A - functional current rating
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) - switching performance class
• Reverse Recovery Time (trr): 35 ns - transient response characteristic

Allowable Parameter Variations:

• Voltage - DC Reverse (Vr) (Max): Substitute parts may exceed the original 400 V rating, provided the higher voltage does not create incompatibility in the application circuit
• Voltage - Forward (Vf) (Max) @ If: Variations within the fast recovery diode class are acceptable
• Current - Reverse Leakage @ Vr: Variations at the substitute part's rated voltage are acceptable
• Operating Temperature - Junction: Substitute parts must support the application's required temperature range

The SDURD1060 from SMC Diode Solutions qualifies as a substitute based on matching package, mounting type, current rating, speed classification, and reverse recovery time, while providing an elevated voltage rating of 600 V.

Parameter Comparison

Engineering Selection Recommendations

SDURD1060 Substitution Basis:

The SDURD1060 is a direct substitute for the CUD10-04 BK based on identical package geometry (TO-252-3 DPAK), matching current rating (10 A), identical speed classification (Fast Recovery ≤ 500ns), and matching reverse recovery time (35 ns). The substitute maintains ROHS3 compliance and is currently in active production status, ensuring long-term availability.

Voltage Rating Consideration:

The SDURD1060 provides a 600 V reverse voltage rating compared to the original 400 V specification. This elevated rating is compatible with applications designed for the CUD10-04 BK, as the substitute will not introduce voltage-related failures in circuits operating at or below 400 V.

Forward Voltage Difference:

The SDURD1060 exhibits a forward voltage of 1.66 V @ 10 A compared to 1.3 V @ 10 A for the CUD10-04 BK. This 0.36 V increase must be evaluated within the specific circuit application to determine if power dissipation or thermal management changes are required.

Temperature Range:

The SDURD1060 operating temperature range (-55°C to 150°C) is narrower at the low end compared to the CUD10-04 BK (-65°C to 150°C). Applications requiring operation below -55°C junction temperature must not use this substitute.

Compliance Status:

Both parts meet ROHS3 compliance. The SDURD1060 is additionally noted as REACH Affected. The substitute is actively manufactured and stocked, providing superior procurement continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the SDURD1060 be used as a direct replacement for the CUD10-04 BK in all applications?

A: The SDURD1060 is mechanically and electrically compatible for applications operating within the substitute's temperature range (-55°C to 150°C). Applications requiring operation below -55°C junction temperature require alternative solutions. Forward voltage differences (1.66 V vs. 1.3 V) must be evaluated for circuit-specific thermal and power dissipation impacts.

Q: What is the significance of the higher 600 V rating on the SDURD1060?

A: The 600 V reverse voltage rating on the SDURD1060 exceeds the original 400 V specification. This higher rating does not create incompatibility in circuits designed for 400 V operation. The substitute will function correctly at all voltages up to and including 400 V.

Q: Are the packages physically identical?

A: Yes. Both the CUD10-04 BK and SDURD1060 use the TO-252-3 DPAK (2 Leads + Tab) package, designated SC-63. Pin configuration and PCB footprint are identical, enabling direct board-level substitution without layout modifications.

Q: What is the impact of the 0.36 V forward voltage increase?

A: The SDURD1060 forward voltage of 1.66 V @ 10 A is 0.36 V higher than the CUD10-04 BK at 1.3 V @ 10 A. In a 10 A circuit, this results in approximately 3.6 W additional power dissipation per diode. Circuit designers must verify that thermal management and power supply design accommodate this increase.

Q: Is the SDURD1060 available in the same packaging format?

A: The SDURD1060 is supplied in Tape & Reel (TR) format, whereas the original CUD10-04 BK packaging format was not specified in the provided data. Both parts use identical component packaging (DPAK), but procurement format differs. Verify tape and reel specifications with your supplier if specific packaging format is required.

Q: What compliance certifications apply to both parts?

A: Both the CUD10-04 BK and SDURD1060 are ROHS3 compliant. The SDURD1060 is additionally noted as REACH Affected. Both parts carry ECCN classification EAR99 and HTSUS code 8541.10.0080. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for both parts.

Q: Why is the CUD10-04 BK listed as obsolete?

A: The CUD10-04 BK is classified as obsolete by the manufacturer. The SDURD1060 is actively manufactured and represents the current production equivalent, ensuring continued availability and supply chain stability for new designs and ongoing production support.