CDBC380-G Schottky Diode 80V 3A DO-214AB Equivalent & Substitute Parts

Part Overview

The CDBC380-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 80V DC reverse voltage and 3A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production support. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and sourcing requirements.

Substiute Parts

CDBC380-G

Comchip TechnologyIn Stock: 1087CDBC380-G Datasheet

Current PartRFQ

CDBC3100-HF

Comchip TechnologyIn Stock: 3037CDBC3100-HF Datasheet

DirectRFQ

B380-13-F

Diodes IncorporatedIn Stock: 16734B380-13-F Datasheet

MFR RecommendedRFQ

SK38-TP

Micro Commercial CoIn Stock: 10198SK38-TP Datasheet

MFR RecommendedRFQ

SS38

MDDIn Stock: 16419SS38 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDBC380-G is determined by the following criteria:

Primary Compatibility Parameters:

• Voltage - DC Reverse (Vr) rating must equal or exceed 80V
• Current - Average Rectified (Io) must equal or exceed 3A
• Technology must be Schottky
• Speed classification must be Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr must not exceed 500 µA @ rated voltage
• Mounting Type must be Surface Mount
• Package / Case must be compatible with DO-214AB footprint or equivalent SMC/SMA variants

Secondary Compatibility Parameters:

• Operating Temperature - Junction range must accommodate application requirements
• RoHS and REACH compliance status must meet regulatory requirements
• Moisture Sensitivity Level (MSL) must be 1 (Unlimited) or equivalent

Substitute parts are grouped into two categories: Direct Electrical Equivalents (identical voltage and current ratings) and Upgraded Equivalents (higher voltage ratings with identical or superior current handling).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (80V / 3A Rating):

The B380-13-F (Diodes Incorporated) is the primary recommended substitute. This part maintains identical voltage and current specifications while offering active product status, ROHS3 compliance, and superior forward voltage characteristics (790 mV vs. 850 mV @ 3A), resulting in lower power dissipation. The extended operating temperature range (-55°C ~ 125°C) provides additional thermal margin. Inventory availability is substantial (16,657 pcs).

Alternative Direct Replacement:

The SK38-TP (Micro Commercial Co) provides equivalent electrical performance with identical voltage, current, and leakage specifications. However, this part carries a "Not For New Designs" status, limiting its suitability for new product development. It remains viable for legacy system maintenance where design changes are not feasible.

For Upgraded Voltage Rating (100V / 3A):

The CDBC3100-HF (Comchip Technology) offers higher reverse voltage capability (100V vs. 80V) while maintaining 3A current rating. This part is active and ROHS3 compliant with improved forward voltage (810 mV @ 3A). The extended operating temperature range (-50°C ~ 150°C) exceeds the original specification. This substitute is appropriate for applications requiring voltage margin or where 100V-rated components are standardized.

Package Variant (SMA vs. SMC):

The SS38 (MDD) provides equivalent electrical performance in a DO-214AC (SMA) package variant. This part is active and ROHS3 compliant. Selection of this variant requires PCB footprint compatibility verification, as SMA and SMC packages differ in physical dimensions despite similar electrical characteristics.

Product Status Considerations:

• B380-13-F: Active status supports long-term availability and design continuity
• CDBC3100-HF: Active status with higher voltage rating for future-proofing
• SK38-TP: Not For New Designs status restricts use to maintenance and legacy applications
• SS38: Active status with package variant consideration

All recommended substitutes maintain RoHS3 compliance, MSL 1 (Unlimited) rating, and REACH unaffected status, ensuring regulatory alignment with the original CDBC380-G specification.

Frequently Asked Questions (FAQ)

Q: Can the B380-13-F directly replace the CDBC380-G without PCB modifications?

A: Yes. The B380-13-F maintains identical voltage (80V), current (3A), and package specifications (DO-214AB, SMC). No PCB layout changes are required. The lower forward voltage (790 mV vs. 850 mV) reduces power dissipation, which is a performance improvement.

Q: What is the difference between the CDBC3100-HF and CDBC380-G?

A: The CDBC3100-HF has a higher reverse voltage rating (100V vs. 80V) while maintaining the same 3A current capacity. Both use identical DO-214AB packages. The CDBC3100-HF is suitable when higher voltage margin is required or when 100V-rated components are standardized in the design.

Q: Why is the SK38-TP marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new product designs. The SK38-TP remains electrically compatible and suitable for maintenance of existing systems, but should not be selected for new development projects.

Q: Can the SS38 (SMA package) be used instead of the SMC package variants?

A: The SS38 provides equivalent electrical performance but uses a DO-214AC (SMA) package instead of DO-214AB (SMC). Physical dimensions differ between these packages. Substitution requires verification that the PCB footprint accommodates the SMA package. Direct pin-for-pin replacement is not possible without layout modification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (B380-13-F, SK38-TP, CDBC3100-HF, SS38) carry ROHS3 Compliant status, meeting current regulatory requirements. The original CDBC380-G is RoHS Compliant (earlier standard). All parts are REACH Unaffected.

Q: What is the impact of forward voltage differences between substitutes?

A: Forward voltage affects power dissipation in the diode. The B380-13-F (790 mV @ 3A) dissipates less power than the CDBC380-G (850 mV @ 3A). The CDBC3100-HF (810 mV @ 3A) falls between these values. Lower forward voltage reduces thermal load on the component and surrounding circuitry, which is beneficial for thermal management.

Q: Do all substitutes have the same reverse leakage current specification?

A: Yes. All direct equivalents (B380-13-F, SK38-TP, SS38) specify 500 µA @ 80V reverse leakage, matching the CDBC380-G. The CDBC3100-HF specifies 500 µA @ 100V, which is the leakage at its higher rated voltage and remains within acceptable limits for the 80V application.

Q: What is the Moisture Sensitivity Level (MSL) significance?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These components can be stored and handled without special humidity controls, simplifying supply chain management and manufacturing processes.

Q: Which substitute offers the best long-term availability?

A: The B380-13-F (Diodes Incorporated) is recommended for long-term availability due to active product status and high inventory levels (16,657 pcs). The CDBC3100-HF (Comchip Technology) is also active with substantial inventory (2,962 pcs) and offers the additional benefit of higher voltage rating for future design flexibility.