CDBA280-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBA280-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 surface mount DO-214AC (SMA) package. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode specification.

Substiute Parts

CDBA280-G

Comchip TechnologyIn Stock: 872CDBA280-G Datasheet

Current PartRFQ

CDBA2100-G

Comchip TechnologyIn Stock: 1899CDBA2100-G Datasheet

DirectRFQ

CDBA2100-HF

Comchip TechnologyIn Stock: 21748CDBA2100-HF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBA280-G are identified based on strict electrical and mechanical parameter compatibility within the Schottky diode category. The substitution logic is as follows:

Primary Substitution Criteria:

• Technology: Schottky (required)
• Package / Case: DO-214AC (SMA) (required)
• Mounting Type: Surface Mount (required)
• Current - Average Rectified (Io): 2 A (required)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (required)

Voltage Rating Compatibility: Substitute parts must maintain a DC reverse voltage rating equal to or greater than the original 80 V specification. This ensures the substitute can operate safely within the same or more demanding voltage environments.

Forward Voltage Compatibility: Forward voltage drop at rated current must not exceed the original specification of 850 mV @ 2 A to maintain circuit performance and thermal characteristics.

Reverse Leakage Current: Reverse leakage current at the rated voltage must not exceed 500 µA to ensure equivalent circuit behavior and power dissipation profiles.

The identified substitute parts CDBA2100-G and CDBA2100-HF meet all mandatory electrical and mechanical criteria while offering enhanced voltage ratings (100 V) and active product status.

Parameter Comparison

Engineering Selection Recommendations

CDBA2100-G Selection Criteria: The CDBA2100-G is an active product with ROHS3 compliance and identical electrical specifications to the CDBA280-G except for the increased 100 V reverse voltage rating. This part is suitable for direct substitution in applications where the original 80 V rating is adequate and the higher voltage margin provides additional design margin. Product status is active, ensuring long-term availability.

CDBA2100-HF Selection Criteria: The CDBA2100-HF is an active product with ROHS3 compliance and offers superior electrical characteristics: reduced forward voltage drop (810 mV @ 2 A versus 850 mV @ 2 A) and extended operating temperature range (-50°C ~ 150°C versus 125°C max). This part is suitable for applications requiring improved thermal performance, lower power dissipation, or extended temperature operation. The CDBA2100-HF has the highest inventory availability (21,695 pcs) among all options.

Compliance Considerations: Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original CDBA280-G does not specify RoHS status due to its obsolete classification.

Frequently Asked Questions (FAQ)

Q: Can CDBA2100-G or CDBA2100-HF be used as direct replacements for CDBA280-G in existing designs?

A: Yes, both substitute parts are electrically and mechanically compatible. The identical current rating (2 A), package type (DO-214AC/SMA), and fast recovery speed ensure functional equivalence. The higher voltage rating (100 V versus 80 V) provides additional safety margin and does not create incompatibility.

Q: What is the difference between CDBA2100-G and CDBA2100-HF?

A: Both parts share the same 100 V voltage rating and 2 A current rating. The CDBA2100-HF offers a lower forward voltage drop (810 mV versus 850 mV at 2 A) and an extended operating temperature range (-50°C ~ 150°C versus 125°C max). The CDBA2100-HF is preferred for applications requiring lower power dissipation or operation at elevated temperatures.

Q: Are there any package or mounting differences between the main part and substitutes?

A: No. All three parts use identical DO-214AC (SMA) surface mount packaging. PCB layout and assembly processes require no modification.

Q: Why is the CDBA280-G classified as obsolete?

A: The CDBA280-G is obsolete due to manufacturer discontinuation. The CDBA2100 series (both -G and -HF variants) represents the active product line replacement with enhanced specifications and regulatory compliance.

Q: What is the significance of the higher 100 V rating on the substitute parts?

A: The 100 V rating on CDBA2100-G and CDBA2100-HF provides increased reverse voltage capability compared to the original 80 V specification. This allows operation in circuits with higher voltage transients or margin requirements without exceeding the diode's maximum rated voltage.

Q: Are CDBA2100-G and CDBA2100-HF interchangeable with each other?

A: Yes, both parts are interchangeable from an electrical and mechanical standpoint. Selection between them depends on application requirements: choose CDBA2100-G for standard performance or CDBA2100-HF for improved thermal performance and extended temperature range.

Q: What compliance certifications apply to the substitute parts?

A: Both CDBA2100-G and CDBA2100-HF are ROHS3 compliant and REACH unaffected. These certifications ensure compliance with current environmental and hazardous substance regulations.