CDBB280-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBB280-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 80 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement continuity.

Schottky diodes in this voltage and current class are widely used in power supply circuits, voltage regulation, and reverse polarity protection applications where fast recovery characteristics and low forward voltage drop are required.

Substiute Parts

CDBB280-G

Comchip TechnologyIn Stock: 12691CDBB280-G Datasheet

Current PartRFQ

CDBB2100-G

Comchip TechnologyIn Stock: 1358CDBB2100-G Datasheet

DirectRFQ

CDBB2100-HF

Comchip TechnologyIn Stock: 19026CDBB2100-HF Datasheet

DirectRFQ

B280-13-F

Diodes IncorporatedIn Stock: 16069B280-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBB280-G is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky (all substitutes must be Schottky diodes)
• Package / Case: DO-214AA or SMB (surface mount compatibility)
• Current - Average Rectified (Io): 2 A (current rating must equal or exceed)
• Voltage - DC Reverse (Vr) (Max): 80 V minimum (voltage rating must equal or exceed)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (recovery time specification)
• Mounting Type: Surface Mount (PCB assembly compatibility)

Substitution Categories:

Category 1: Direct Voltage Rating Equivalents (80 V) Parts with identical 80 V reverse voltage rating and 2 A current rating maintain exact electrical specifications for the original application.

Category 2: Higher Voltage Rating Substitutes (100 V) Parts with 100 V reverse voltage rating provide enhanced voltage margin while maintaining 2 A current rating and identical package. These are electrically compatible with applications designed for 80 V operation, as higher voltage-rated components operate safely at lower voltages.

All substitute parts listed maintain the DO-214AA (SMB) package footprint, surface mount assembly compatibility, and fast recovery Schottky technology required for direct PCB replacement.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Voltage Rating):

The B280-13-F (Diodes Incorporated) is the manufacturer-recommended direct substitute for the CDBB280-G. Both components share the 80 V reverse voltage rating and 2 A current specification. The B280-13-F is currently in active product status with ROHS3 compliance and extended operating temperature range (-65°C ~ 150°C), providing improved long-term availability and regulatory compliance compared to the obsolete CDBB280-G.

For Enhanced Voltage Margin Applications:

The CDBB2100-HF and CDBB2100-G (Comchip Technology) provide 100 V reverse voltage rating while maintaining 2 A current and identical DO-214AA package. These parts are suitable for applications where additional voltage headroom is beneficial. The CDBB2100-HF offers superior forward voltage characteristics (810 mV @ 2 A versus 850 mV @ 2 A) and extended temperature range (-50°C ~ 150°C), reducing power dissipation in high-current applications.

Compliance and Availability:

All active substitute parts (CDBB2100-G, CDBB2100-HF, B280-13-F) maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental requirements. Current inventory levels support immediate procurement for all three active alternatives.

Frequently Asked Questions (FAQ)

Q: Can CDBB2100-G or CDBB2100-HF be used as direct replacements for CDBB280-G?

A: Yes. Both CDBB2100 variants are electrically compatible substitutes. The 100 V reverse voltage rating exceeds the 80 V requirement of the original CDBB280-G. All three parts share identical 2 A current rating, DO-214AA package, and fast recovery Schottky technology. The higher voltage rating does not affect operation in 80 V applications.

Q: What is the difference between CDBB2100-G and CDBB2100-HF?

A: Both parts are 100 V, 2 A Schottky diodes in DO-214AA package. The CDBB2100-HF has lower forward voltage (810 mV @ 2 A versus 850 mV @ 2 A), resulting in reduced power dissipation. The CDBB2100-HF also features extended operating temperature range (-50°C ~ 150°C versus -55°C ~ 125°C) and specified junction capacitance (30pF @ 4V, 1MHz).

Q: Is B280-13-F from Diodes Incorporated compatible with the CDBB280-G footprint?

A: Yes. The B280-13-F uses the same DO-214AA (SMB) package as the CDBB280-G, ensuring identical PCB footprint and surface mount assembly compatibility. Both components are rated for 80 V and 2 A.

Q: Why does B280-13-F show higher reverse leakage current (7 mA @ 80 V) compared to CDBB280-G (500 µA @ 80 V)?

A: Reverse leakage current specifications vary between manufacturers based on measurement conditions and device design. The B280-13-F specification reflects Diodes Incorporated's characterization methodology. Both values remain within acceptable ranges for Schottky diode applications. Verify leakage current requirements against specific circuit design parameters if this parameter is critical.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All substitute parts (CDBB2100-G, CDBB2100-HF, B280-13-F) share the DO-214AA (SMB) package and identical pin configuration, enabling direct PCB footprint compatibility without layout modifications.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring 80 V operation, the B280-13-F (Diodes Incorporated) is recommended as the primary choice due to active product status, ROHS3 compliance, and extended temperature range. For applications benefiting from higher voltage margin, the CDBB2100-HF provides superior forward voltage characteristics and temperature performance.