CDBD2080-G Schottky Diode Array Equivalent & Substitute Parts

Part Overview

The CDBD2080-G is a Schottky diode array manufactured by Comchip Technology, configured as 1 pair common cathode with 80V reverse voltage rating and 20A average rectified current per diode. The device is packaged in TO-263-3 D2PAK surface mount configuration with 2 leads plus tab.

This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, production continuity, and system maintenance. Active substitute parts with identical or compatible electrical and mechanical specifications are available from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io) per Diode	20	A (DC)
Voltage - Forward (Vf) (Max) @ If	850 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 80 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDBD2080-G is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 pair common cathode
Technology: Schottky
Voltage rating: 80V DC reverse (Vr) minimum
Current rating: 20A average rectified (Io) per diode or higher
Package: TO-263-3 D2PAK (2 Leads + Tab) TO-263AB
Mounting type: Surface mount

Secondary Compatibility Parameters:

Forward voltage (Vf): Electrical performance indicator; lower values indicate improved efficiency
Reverse leakage current: Lower values indicate superior blocking characteristics
Operating temperature range: Must support application thermal requirements
Product status: Active status ensures ongoing availability and support

Two substitute parts meet these criteria with full electrical and mechanical compatibility.

Parameter Comparison

Parameter	CDBD2080-G (Main)	STPS40M80CG-TR (Substitute)	VBT2080C-E3/8W (Substitute)
Manufacturer	Comchip Technology	STMicroelectronics	Vishay General Semiconductor - Diodes Division
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V
Current - Average Rectified (Io) per Diode	20 A (DC)	20 A	10 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 10 A	735 mV @ 20 A	810 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 80 V	65 µA @ 80 V	600 µA @ 80 V
Operating Temperature - Junction	-55°C ~ 150°C	175°C (Max)	-55°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

STPS40M80CG-TR (STMicroelectronics)

This substitute provides full electrical and mechanical compatibility with the CDBD2080-G. The STPS40M80CG-TR maintains identical 80V reverse voltage and 20A current ratings. Key advantages include lower forward voltage (735 mV @ 20 A versus 850 mV @ 10 A), resulting in reduced power dissipation and improved thermal performance. Reverse leakage current is significantly lower at 65 µA @ 80 V, indicating superior blocking characteristics. The device supports higher maximum junction temperature (175°C) and carries ROHS3 compliance certification. Product status is active with substantial inventory availability (86,866 pcs), ensuring long-term supply continuity. Packaging is Cut Tape (CT) and Digi-Reel® format.

VBT2080C-E3/8W (Vishay General Semiconductor - Diodes Division)

This substitute is electrically and mechanically compatible with the CDBD2080-G within the TO-263-3 D2PAK package. The VBT2080C-E3/8W is part of the TMBS® series and maintains 80V reverse voltage rating. Current rating is 10A per diode, which is lower than the main part's 20A specification. Forward voltage is 810 mV @ 10 A, comparable to the main part. Operating temperature range matches the main part (-55°C ~ 150°C). Product status is active with ROHS3 compliance. Reverse leakage current is 600 µA @ 80 V. Packaging is Tape & Reel (TR) format with 1,143 pcs inventory availability.

Selection Basis:

STPS40M80CG-TR is the primary substitute for direct replacement applications requiring full 20A current capability and improved electrical performance characteristics. VBT2080C-E3/8W is suitable for applications where 10A per diode current rating is sufficient, offering an alternative from an established manufacturer with active product status and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can STPS40M80CG-TR directly replace CDBD2080-G in all applications?

A: Yes. STPS40M80CG-TR provides full electrical and mechanical compatibility. Both devices are configured as 1 pair common cathode Schottky diodes with 80V reverse voltage and 20A average rectified current per diode. Package, pinout, and mounting type are identical (TO-263-3 D2PAK). The substitute offers improved performance with lower forward voltage and reverse leakage current.

Q: Why is the current rating different for VBT2080C-E3/8W?

A: VBT2080C-E3/8W is rated for 10A average rectified current per diode, compared to 20A for the main part. This device is suitable only for applications where the circuit design requires 10A or less per diode. For applications requiring full 20A capability, STPS40M80CG-TR is the appropriate substitute.

Q: Are both substitutes available in the same packaging format?

A: Both substitutes use the same TO-263-3 D2PAK (2 Leads + Tab) TO-263AB package as the main part, ensuring mechanical and thermal compatibility. Packaging format differs: STPS40M80CG-TR is supplied in Cut Tape (CT) and Digi-Reel® format, while VBT2080C-E3/8W is supplied in Tape & Reel (TR) format.

Q: What is the significance of the lower reverse leakage current in STPS40M80CG-TR?

A: Lower reverse leakage current (65 µA @ 80 V versus 500 µA @ 80 V) indicates superior blocking characteristics and reduced standby power consumption. This is a performance advantage in applications sensitive to leakage current.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both STPS40M80CG-TR and VBT2080C-E3/8W carry ROHS3 compliance certification. The main part CDBD2080-G does not specify RoHS status.

Q: What is the moisture sensitivity level for these parts?

A: All three parts, including both substitutes, have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

Q: Can I use VBT2080C-E3/8W if my application only requires 10A per diode?

A: Yes. If your circuit design operates at 10A or below per diode, VBT2080C-E3/8W is electrically and mechanically compatible. Verify that the 10A rating meets your application's current requirements before selection.

Q: What is the product status of the main part, and why does it matter?

A: CDBD2080-G is classified as obsolete. Both substitute parts are active products, ensuring ongoing manufacturing, availability, and technical support. Active status is critical for long-term supply chain reliability and design continuity.

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