CDBD2020-G Equivalent & Substitute Parts

Part Overview

The CDBD2020-G is a Schottky diode array manufactured by Comchip Technology, configured as 1 Pair Common Cathode with a maximum reverse voltage rating of 20 V and average rectified current of 20 A per diode. The component is packaged in TO-263-3 D2PAK surface mount configuration with 2 leads plus tab.

This part is classified as Obsolete. Identification of equivalent and substitute components is necessary to support ongoing production requirements, maintenance operations, and design continuity where original inventory becomes depleted or unavailable.

Substiute Parts

CDBD2020-G

Comchip TechnologyIn Stock: 1193CDBD2020-G Datasheet

Current PartRFQ

SB2540DC

SMC Diode SolutionsIn Stock: 743SB2540DC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBD2020-G is evaluated based on the following critical parameters that determine functional compatibility:

Mandatory Compatibility Criteria:

• Diode Configuration: 1 Pair Common Cathode (electrical topology must match)
• Technology: Schottky (device physics and performance characteristics)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (mechanical and thermal interface)
• Mounting Type: Surface Mount (assembly process compatibility)

Electrical Performance Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 20 V
• Current - Average Rectified (Io) (per Diode): Substitute must equal or exceed 20 A
• Voltage - Forward (Vf) (Max) @ If: Substitute must not exceed 550 mV at specified current
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (switching performance requirement)
• Current - Reverse Leakage @ Vr: Substitute must not exceed 500 µA @ 20 V

Environmental and Regulatory Parameters:

• Operating Temperature - Junction: Substitute must support -55°C to 125°C minimum
• Moisture Sensitivity Level (MSL): Substitute must be MSL 1 or equivalent

The SB2540DC from SMC Diode Solutions meets all mandatory compatibility criteria and exceeds electrical performance specifications, making it a qualified substitute for the CDBD2020-G.

Parameter Comparison

Engineering Selection Recommendations

SB2540DC as Primary Substitute:

The SB2540DC is a qualified substitute for the CDBD2020-G based on the following engineering factors:

1. Electrical Compatibility: The SB2540DC exceeds all electrical performance requirements of the CDBD2020-G. The higher voltage rating (40 V vs. 20 V) and increased current capacity (25 A vs. 20 A) provide design margin in applications operating at or below the original specifications.

2. Package and Mechanical Compatibility: Both components use identical TO-263-3 D2PAK surface mount packaging with 2 leads plus tab. No PCB layout modifications or assembly process changes are required.

3. Thermal Performance: The SB2540DC supports an extended operating temperature range (-55°C to 200°C) compared to the CDBD2020-G (-55°C to 125°C), providing additional thermal margin.

4. Product Status and Availability: The CDBD2020-G is classified as Obsolete. The SB2540DC is in Active production status with confirmed inventory availability (728 Pcs New Original In Stock), ensuring long-term supply continuity.

5. Regulatory Compliance: The SB2540DC is ROHS3 Compliant and REACH Affected, meeting current environmental and regulatory standards. Both components share the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

6. Moisture Sensitivity: Both components are MSL 1 (Unlimited), indicating no moisture sensitivity constraints for storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the SB2540DC be used as a direct replacement for the CDBD2020-G without circuit modifications?

A: Yes. The SB2540DC is a direct pin-compatible substitute with identical TO-263-3 D2PAK packaging. No circuit modifications are required. The electrical specifications of the SB2540DC meet or exceed all requirements of the CDBD2020-G.

Q: What is the significance of the higher voltage rating (40 V) on the SB2540DC compared to the CDBD2020-G (20 V)?

A: The higher voltage rating provides additional design margin and allows the component to operate safely in applications with transient voltage spikes or design headroom. In applications designed for 20 V operation, the 40 V rated component will perform identically while offering increased reliability margin.

Q: Are there any thermal considerations when substituting the SB2540DC for the CDBD2020-G?

A: The SB2540DC supports a wider operating temperature range (-55°C to 200°C) compared to the CDBD2020-G (-55°C to 125°C). This provides additional thermal margin. Both components use the same D2PAK package, so thermal dissipation characteristics are equivalent.

Q: What is the difference in reverse leakage current between these components?

A: The CDBD2020-G specifies 500 µA @ 20 V, while the SB2540DC specifies 1 mA @ 40 V. At the original operating voltage of 20 V, the SB2540DC leakage current will be lower than the specified maximum, making it compatible with the original design requirements.

Q: Is the SB2540DC available in the same packaging format?

A: Yes. Both the CDBD2020-G and SB2540DC use TO-263-3 D2PAK (2 Leads + Tab), TO-263AB surface mount packaging. No PCB layout changes are necessary.

Q: What is the product status difference between these components?

A: The CDBD2020-G is Obsolete, indicating it is no longer in active production. The SB2540DC is Active, meaning it is currently manufactured and available from inventory. This makes the SB2540DC the appropriate choice for new designs and ongoing production support.

Q: Are there any compliance or regulatory differences?

A: The SB2540DC is ROHS3 Compliant and REACH Affected, meeting current environmental standards. Both components share the same ECCN (EAR99) and HTSUS classifications. The SB2540DC meets or exceeds all regulatory requirements applicable to the CDBD2020-G.