CUD10-02 TR13 Equivalent & Substitute Parts

Part Overview

The CUD10-02 TR13 is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 200 V DC reverse voltage and 10 A average rectified current in a surface mount DPAK package. This component is classified as obsolete, making identification of equivalent substitute parts necessary for ongoing design support and procurement continuity. The fast recovery characteristic (≤500 ns) and 35 ns reverse recovery time position this diode for applications requiring rapid switching performance in rectification circuits.

Substiute Parts

CUD10-02 TR13

Central Semiconductor CorpIn Stock: 1186CUD10-02 TR13 Datasheet

Current PartRFQ

STTH1003SB-TR

STMicroelectronicsIn Stock: 20410STTH1003SB-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CUD10-02 TR13 is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Current rating: 10 A average rectified current (Io)
• Package type: DPAK surface mount (TO-252-3, SC-63)
• Reverse recovery speed: Fast Recovery classification (≤500 ns)
• Reverse recovery time: 35 ns
• Reverse leakage current: 10 µA specification
• Mounting type: Surface mount
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

Allowable Parameter Variations:

• Voltage - DC Reverse (Vr): Substitute must equal or exceed 200 V
• Voltage - Forward (Vf): Substitute may vary within application tolerance
• Operating temperature range: Substitute maximum junction temperature must support application requirements
• Product status: Active status preferred for long-term availability

The STTH1003SB-TR meets all mandatory criteria and exceeds the voltage specification, making it a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The STTH1003SB-TR is a qualified substitute for the obsolete CUD10-02 TR13 based on the following engineering factors:

Product Status Consideration: The CUD10-02 TR13 is classified as obsolete, while the STTH1003SB-TR maintains active manufacturing status with STMicroelectronics. This ensures long-term availability and supply chain continuity.

Electrical Compatibility: Both devices share identical current ratings (10 A), reverse recovery time (35 ns), and fast recovery speed classification. The STTH1003SB-TR provides a higher voltage rating (300 V vs. 200 V), which is acceptable for applications designed around the 200 V specification and provides additional design margin.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements.

Thermal Performance: The STTH1003SB-TR supports a maximum junction temperature of 175°C compared to 150°C for the original part, providing improved thermal headroom in applications with elevated ambient conditions.

Forward Voltage Consideration: The STTH1003SB-TR exhibits a higher forward voltage drop (1.3 V vs. 950 mV at 10 A). Circuit designers must evaluate thermal dissipation impact in power-sensitive applications, as increased forward voltage results in proportionally higher power loss.

Package Compatibility: Identical DPAK surface mount packaging (TO-252-3, SC-63) ensures direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the STTH1003SB-TR directly replace the CUD10-02 TR13 without circuit modification?

A: The STTH1003SB-TR is mechanically and electrically compatible for direct substitution in the same PCB footprint. However, the higher forward voltage (1.3 V vs. 950 mV) increases power dissipation. Thermal analysis of the specific application is required to confirm adequate heat dissipation capability.

Q: Why does the substitute part have a higher voltage rating (300 V vs. 200 V)?

A: Higher voltage ratings in substitute components are acceptable and common in engineering practice. A 300 V rated diode operates safely in a 200 V application and provides additional design margin against voltage transients. This does not compromise performance or reliability.

Q: Are the DPAK packages identical between both parts?

A: Yes. Both the CUD10-02 TR13 and STTH1003SB-TR use the TO-252-3 DPAK package (SC-63 designation). PCB footprints, lead spacing, and thermal pad dimensions are identical, enabling direct component substitution without layout changes.

Q: What is the significance of the 35 ns reverse recovery time specification?

A: The 35 ns reverse recovery time indicates fast switching performance, critical for rectification circuits requiring rapid diode turn-off. Both the original and substitute parts maintain this specification, ensuring equivalent switching behavior in high-frequency applications.

Q: Does the higher maximum junction temperature (175°C vs. 150°C) provide any advantage?

A: The higher temperature rating of the STTH1003SB-TR provides improved thermal margin in applications operating near maximum ambient conditions. This does not change circuit performance but may extend component life in thermally constrained designs.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. No compliance disadvantages exist with the substitute part. The STTH1003SB-TR additionally carries REACH Unaffected status.

Q: How does the higher forward voltage affect circuit design?

A: The 350 mV increase in forward voltage (1.3 V vs. 950 mV at 10 A) results in proportionally higher power dissipation in the diode. For a 10 A rectifier circuit, this represents approximately 3.5 W additional dissipation. Thermal design verification is necessary for applications with tight thermal budgets.