CDBB320-G Schottky Diode 20V 3A DO-214AA Equivalent & Substitute Parts

Part Overview

The CDBB320-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 3A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as Obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing manufacturing requirements for applications utilizing this diode specification.

Substiute Parts

CDBB320-G

Comchip TechnologyIn Stock: 12781CDBB320-G Datasheet

Current PartRFQ

CDBB340-HF

Comchip TechnologyIn Stock: 1311CDBB340-HF Datasheet

DirectRFQ

CDBB340-G

Comchip TechnologyIn Stock: 12680CDBB340-G Datasheet

MFR RecommendedRFQ

B320B-13-F

Diodes IncorporatedIn Stock: 344406B320B-13-F Datasheet

MFR RecommendedRFQ

SK32B-LTP

Micro Commercial CoIn Stock: 6872SK32B-LTP Datasheet

MFR RecommendedRFQ

SK32B-TP

Micro Commercial CoIn Stock: 3733SK32B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBB320-G is determined by strict electrical and mechanical compatibility criteria. The following parameters must be met or exceeded in substitute parts:

Critical Substitution Parameters:

• Voltage - DC Reverse (Vr) (Max): Must be ≥ 20V
• Current - Average Rectified (Io): Must be ≥ 3A
• Voltage - Forward (Vf) (Max) @ If: Must be ≤ 500 mV @ 3A
• Speed: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: Must be ≤ 500 µA @ 20V
• Package / Case: Must be DO-214AA (SMB)
• Mounting Type: Must be Surface Mount

Substitute Parts Identified:

Group 1: Direct Electrical Equivalents (20V Rating)

• B320B-13-F (Diodes Incorporated) — Active product status, automotive qualified
• SK32B-LTP (Micro Commercial Co) — Not For New Designs status
• SK32B-TP (Micro Commercial Co) — Obsolete status

Group 2: Higher Voltage Rating (40V Rating)

• CDBB340-HF (Comchip Technology) — Active product status
• CDBB340-G (Comchip Technology) — Not For New Designs status

Parts in Group 1 maintain the original 20V specification and are direct replacements. Parts in Group 2 provide higher voltage rating (40V) and are suitable for applications where reverse voltage margin is not constrained by circuit design.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: B320B-13-F (Diodes Incorporated) is the recommended substitute. This part maintains the original 20V / 3A electrical specification, is in Active product status, carries AEC-Q101 automotive qualification, and is ROHS3 compliant. It provides the highest supply availability (344,300 pcs in stock) and supports long-term design continuity.

For Existing Production (Direct Replacement): SK32B-LTP (Micro Commercial Co) provides direct electrical and mechanical compatibility with the CDBB320-G. Although classified as Not For New Designs, it meets all electrical parameters and maintains the DO-214AA package specification. This option is suitable for sustaining production of existing designs.

For Applications Requiring Higher Voltage Margin: CDBB340-HF (Comchip Technology) is suitable when circuit design permits operation at 40V reverse voltage rating. This part is in Active product status and provides enhanced voltage headroom. CDBB340-G offers the same electrical specification but is classified as Not For New Designs.

Compliance Considerations: All substitute parts listed are REACH Unaffected and classified as EAR99 for export control purposes. B320B-13-F provides the highest compliance profile with ROHS3 and AEC-Q101 certifications.

Frequently Asked Questions (FAQ)

Q: Can B320B-13-F be used as a direct replacement for CDBB320-G? A: Yes. B320B-13-F meets all electrical parameters of the CDBB320-G: 20V reverse voltage, 3A average rectified current, 500 mV forward voltage at 3A, and fast recovery speed. Both use the DO-214AA (SMB) package. B320B-13-F is in Active product status and is recommended for new designs.

Q: What is the difference between the 20V and 40V substitute options? A: The 20V options (B320B-13-F, SK32B-LTP, SK32B-TP) maintain the original voltage specification and are direct replacements. The 40V options (CDBB340-HF, CDBB340-G) provide higher reverse voltage rating and are suitable only if circuit design does not require the lower voltage specification. The 40V parts have identical current and forward voltage ratings.

Q: Are there packaging differences between substitute parts? A: All substitute parts use the DO-214AA (SMB) surface mount package. Packaging format differs: CDBB320-G, SK32B-LTP, and SK32B-TP are supplied in Cut Tape (CT) & Digi-Reel®; B320B-13-F, CDBB340-HF, and CDBB340-G are supplied in Tape & Reel (TR). Both formats are compatible with standard SMT assembly equipment.

Q: Which substitute part has the best long-term availability? A: B320B-13-F has the highest inventory level (344,300 pcs in stock) and is in Active product status, indicating ongoing production and long-term availability support.

Q: Can SK32B-TP or SK32B-LTP be used in new designs? A: SK32B-TP is Obsolete and SK32B-LTP is Not For New Designs. These parts are suitable only for sustaining production of existing designs. For new designs, B320B-13-F is the recommended choice.

Q: What are the temperature operating range differences? A: CDBB320-G specifies 125°C maximum junction temperature. B320B-13-F and SK32B-LTP support -55°C to 150°C, providing wider operating range. SK32B-TP supports -55°C to 125°C. CDBB340-HF supports -40°C to 70°C, which is more limited. Verify application temperature requirements before selection.

Q: Is AEC-Q101 qualification required for my application? A: B320B-13-F carries AEC-Q101 automotive qualification. If your application requires automotive-grade components, B320B-13-F is the appropriate choice. Other substitutes do not specify this qualification.