CDBB180-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBB180-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 80 V DC reverse voltage and 1 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current product availability and compliance requirements.

Substiute Parts

CDBB180-G

Comchip TechnologyIn Stock: 12994CDBB180-G Datasheet

Current PartRFQ

CDBB1100-G

Comchip TechnologyIn Stock: 12912CDBB1100-G Datasheet

DirectRFQ

CDBB1100-HF

Comchip TechnologyIn Stock: 6706CDBB1100-HF Datasheet

DirectRFQ

B180B-13-F

Diodes IncorporatedIn Stock: 2975B180B-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDBB180-G are classified based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

• Technology: Schottky rectifier diode
• Package / Case: DO-214AA (SMB) surface mount
• Current - Average Rectified (Io): 1 A
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Voltage Rating Considerations: Substitutes are grouped into two categories based on DC reverse voltage rating:

1. Direct Voltage Match (80 V): Parts with identical 80 V Vr(Max) rating maintain exact electrical equivalence for circuits designed to the CDBB180-G specification.

2. Higher Voltage Rating (100 V): Parts with 100 V Vr(Max) rating provide enhanced voltage margin and are electrically compatible in applications where the original 80 V rating is not a limiting constraint. These parts operate within the same current and thermal specifications.

Forward Voltage Characteristics: Forward voltage drop (Vf) at 1 A ranges from 790 mV to 850 mV across the substitute group. This variation is within typical Schottky diode tolerance and does not affect substitutability for rectification applications.

Compliance and Availability: The CDBB180-G is obsolete. Active substitute parts carry current product status and RoHS3 compliance certification, ensuring long-term supply chain viability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

CDBB1100-G (Comchip Technology): This part is an active product with 100 V Vr(Max) rating, providing 20 V additional voltage margin over the CDBB180-G. Electrical parameters for current, forward voltage, and reverse leakage are identical to the original part. RoHS3 compliance ensures regulatory alignment for new designs and production. Suitable for direct substitution in applications where 80 V minimum voltage rating is required and higher voltage tolerance is acceptable.

CDBB1100-HF (Comchip Technology): This active product variant offers improved forward voltage characteristics (810 mV @ 1 A versus 850 mV @ 1 A), reducing power dissipation in rectification circuits. The 100 V Vr(Max) rating provides enhanced voltage margin. Extended operating temperature range (-50°C to 150°C) supports applications with wider thermal requirements. RoHS3 compliance and MSL 1 rating match the original specification. Suitable for substitution where lower forward voltage drop and extended temperature performance are beneficial.

B180B-13-F (Diodes Incorporated): This active product maintains the original 80 V Vr(Max) rating, providing exact voltage equivalence to the CDBB180-G. Forward voltage is 790 mV @ 1 A, the lowest among substitute options, minimizing power dissipation. Extended operating temperature range (-65°C to 150°C) supports demanding thermal environments. RoHS3 compliance and MSL 1 rating ensure regulatory and supply chain continuity. Suitable for direct substitution where voltage rating equivalence and lowest forward voltage drop are required.

All three substitute parts are active products with current availability, RoHS3 compliance, and MSL 1 moisture sensitivity rating, ensuring long-term supply chain viability and regulatory alignment for production environments.

Frequently Asked Questions (FAQ)

Q: Can CDBB1100-G and CDBB1100-HF be used interchangeably with CDBB180-G?

A: Both parts are electrically compatible substitutes. The CDBB1100-G maintains identical electrical parameters to the CDBB180-G except for the higher 100 V voltage rating. The CDBB1100-HF offers lower forward voltage (810 mV versus 850 mV) and extended temperature range. Both are suitable for applications where the original 80 V rating is not a limiting constraint.

Q: What is the difference between CDBB1100-G and CDBB1100-HF?

A: Both parts share the same 100 V Vr(Max) rating and 1 A current specification. CDBB1100-HF has lower forward voltage (810 mV @ 1 A versus 850 mV @ 1 A) and an extended operating temperature range (-50°C to 150°C versus 125°C max). CDBB1100-HF is preferred for applications requiring lower power dissipation or wider thermal operating margins.

Q: Is B180B-13-F a direct replacement for CDBB180-G?

A: B180B-13-F is a direct electrical equivalent with matching 80 V Vr(Max) rating and 1 A current specification. It is manufactured by Diodes Incorporated rather than Comchip Technology. Forward voltage is lower (790 mV @ 1 A), and operating temperature range is extended (-65°C to 150°C). It is suitable for direct substitution in applications where voltage rating equivalence is required.

Q: Are all substitute parts in the same DO-214AA (SMB) package?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with the original CDBB180-G design.

Q: What is the significance of the higher 100 V rating in CDBB1100-G and CDBB1100-HF?

A: The 100 V rating provides 20 V additional voltage margin above the original 80 V specification. This allows operation in circuits with higher transient voltage spikes or design margins without exceeding the diode's reverse voltage rating. The higher rating does not affect performance in 80 V applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CDBB1100-G, CDBB1100-HF, and B180B-13-F are all RoHS3 compliant, ensuring regulatory alignment for production environments and long-term supply chain viability.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component has unlimited shelf life without special moisture control measures. All parts in this comparison, including the original CDBB180-G, carry MSL 1 rating.

Q: Which substitute part has the lowest forward voltage drop?

A: B180B-13-F has the lowest forward voltage at 790 mV @ 1 A, compared to 850 mV for CDBB180-G and CDBB1100-G, and 810 mV for CDBB1100-HF. Lower forward voltage reduces power dissipation in rectification applications.