CDBB220-G Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBB220-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 20V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. The CDBB220-G serves in fast recovery rectification applications requiring low forward voltage drop and rapid switching characteristics typical of Schottky technology.

Substiute Parts

CDBB220-G

Comchip TechnologyIn Stock: 3924CDBB220-G Datasheet

Current PartRFQ

CDBB240-HF

Comchip TechnologyIn Stock: 39270CDBB240-HF Datasheet

DirectRFQ

CDBB240-G

Comchip TechnologyIn Stock: 2374CDBB240-G Datasheet

MFR RecommendedRFQ

B220-13-F

Diodes IncorporatedIn Stock: 65409B220-13-F Datasheet

UpgradeRFQ

SK32B-LTP

Micro Commercial CoIn Stock: 6872SK32B-LTP Datasheet

MFR RecommendedRFQ

SL22-E3/52T

Vishay General Semiconductor - Diodes DivisionIn Stock: 10266SL22-E3/52T Datasheet

MFR RecommendedRFQ

SL22-E3/5BT

Vishay General Semiconductor - Diodes DivisionIn Stock: 1117SL22-E3/5BT Datasheet

MFR RecommendedRFQ

SS22T3G

onsemiIn Stock: 33263SS22T3G Datasheet

MFR RecommendedRFQ

SSL22H

Taiwan Semiconductor CorporationIn Stock: 975SSL22H Datasheet

MFR RecommendedRFQ

SS22 R5G

Taiwan Semiconductor CorporationIn Stock: 973SS22 R5G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBB220-G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20V
• Current - Average Rectified (Io): Must equal or exceed 2A
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 500 mV @ 2A (or equivalent current rating)
• Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: Must be DO-214AA or SMB equivalent
• Mounting Type: Must be Surface Mount
• Technology: Must be Schottky

Secondary Compatibility Factors:

• Operating Temperature Range: Substitute must support minimum -55°C junction temperature
• Moisture Sensitivity Level: MSL 1 (Unlimited) preferred for compatibility
• RoHS and REACH compliance status

Substitutes are grouped into three categories based on their relationship to the CDBB220-G:

1. Direct Manufacturer Equivalents (Comchip Technology CDBB240 series): Same manufacturer, identical package, higher voltage rating (40V), identical current and forward voltage specifications.

2. Manufacturer Recommended Alternatives (Diodes Incorporated, Vishay, onsemi, Micro Commercial Co, Taiwan Semiconductor Corporation): Different manufacturers, identical or superior electrical specifications, same package, active product status.

3. Parametric Equivalents (Taiwan Semiconductor Corporation SS22 R5G): Identical electrical specifications, same package, discontinued status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance):

Select B220-13-F (Diodes Incorporated) or SL22-E3/52T / SL22-E3/5BT (Vishay General Semiconductor) as primary alternatives. These parts maintain identical 20V/2A specifications, identical package configuration, and active product status with ROHS3 compliance. B220-13-F offers the widest operating temperature range (-65°C ~ 150°C) compared to the original -55°C ~ 125°C specification.

For Higher Voltage Margin Applications:

Select CDBB240-HF or CDBB240-G (Comchip Technology) when circuit design permits 40V reverse voltage rating. Both maintain identical 2A current and 500 mV forward voltage specifications while providing enhanced voltage margin. CDBB240-HF includes capacitance specification (30pF @ 4V, 1MHz) not provided for the original part.

For Enhanced Current Capability:

Select SK32B-LTP (Micro Commercial Co) when 3A average rectified current is required within the same 20V voltage class. This part exceeds the original 2A specification while maintaining identical package and fast recovery characteristics. Note: Product status is "Not For New Designs."

For Automotive Applications:

Select SSL22H (Taiwan Semiconductor Corporation) when AEC-Q101 automotive qualification is required. This part meets all electrical specifications with superior forward voltage (410 mV @ 2A) and includes automotive-grade certification.

Compliance Considerations:

All recommended substitutes carry ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory profile. MSL 1 (Unlimited) moisture sensitivity is maintained across all alternatives, eliminating bake-out requirements.

Frequently Asked Questions (FAQ)

Q: Can CDBB240-HF or CDBB240-G replace CDBB220-G in existing designs?

A: Yes. Both CDBB240 variants maintain identical current (2A) and forward voltage (500 mV @ 2A) specifications. The 40V reverse voltage rating is a superset of the original 20V specification and introduces no functional incompatibility. Electrical performance in 20V circuits remains identical. Verify circuit design does not depend on specific voltage derating curves below 20V.

Q: What is the difference between B220-13-F and SL22-E3/52T?

A: Both parts meet the CDBB220-G electrical specifications (20V, 2A, 500 mV forward voltage, fast recovery). B220-13-F (Diodes Incorporated) operates to -65°C junction temperature versus SL22-E3/52T (Vishay) at -55°C. SL22-E3/52T exhibits lower forward voltage (440 mV @ 2A) and lower reverse leakage (400 µA @ 20V). B220-13-F provides wider temperature margin; SL22-E3/52T provides lower power dissipation.

Q: Why is SK32B-LTP listed as "Not For New Designs"?

A: SK32B-LTP carries this status from Micro Commercial Co, indicating the manufacturer is not recommending this part for new circuit designs. However, the part remains electrically qualified as a substitute with 3A current capability. Use only in legacy design updates or when 3A current is specifically required.

Q: Is SSL22H suitable for non-automotive applications?

A: Yes. SSL22H meets all CDBB220-G electrical specifications and carries ROHS3 compliance. AEC-Q101 automotive qualification is an additional feature that does not restrict use in non-automotive circuits. The part is fully compatible with standard industrial and consumer applications.

Q: What is the significance of "Last Time Buy" status for SS22T3G?

A: SS22T3G (onsemi) is in Last Time Buy phase, meaning the manufacturer has announced end-of-life but continues accepting orders for a limited period. This part meets all electrical specifications but should not be selected for new long-term production designs. Use only for legacy support or short-term requirements.

Q: Can I use SS22 R5G as a replacement?

A: SS22 R5G is a parametric equivalent with identical 20V/2A specifications and DO-214AA package. However, this part is discontinued at DiGi Electronics, indicating limited availability. Use only when other active alternatives are unavailable and supply chain verification confirms adequate stock.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage variations (410 mV to 500 mV @ 2A) result in proportional power dissipation differences. Lower forward voltage (SSL22H at 410 mV, SL22-E3/52T at 440 mV) reduces heat generation by approximately 18-22% compared to 500 mV parts. Select lower Vf alternatives for thermally constrained applications; select standard Vf parts when thermal margin is adequate.

Q: Are all substitutes available in identical packaging options?

A: All listed substitutes use DO-214AA (SMB) surface mount package, maintaining identical PCB footprint and reflow soldering compatibility. Packaging options vary by supplier (Tape & Reel, Cut Tape, Digi-Reel®) but do not affect electrical or mechanical compatibility. Verify packaging format availability with your component supplier.

Q: What is the impact of reverse leakage current differences?

A: Reverse leakage variations (400 µA to 500 µA @ 20V) are negligible in most rectification applications. Lower leakage (400 µA) provides marginal benefit in high-impedance or precision analog circuits. Standard leakage (500 µA) is acceptable for power conversion and switching applications. Select based on circuit sensitivity to leakage current, not as a primary substitution criterion.