CDSW19-G Equivalent & Substitute Parts

Part Overview

The CDSW19-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100V DC reverse voltage with 200mA average rectified current in a surface mount SOD-123 package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the SOD-123 or compatible package footprints. The primary substitute identified is the S1BFL from onsemi, which shares the same reverse voltage rating but operates at higher current capacity.

Substiute Parts

CDSW19-G

Comchip TechnologyIn Stock: 1172CDSW19-G Datasheet

Current PartRFQ

S1BFL

onsemiIn Stock: 15754S1BFL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDSW19-G is determined by the following criteria:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 100V minimum
• Package compatibility: SOD-123 or SOD-123F (compatible footprint)
• RoHS3 compliance status
• Moisture Sensitivity Level: MSL 1

Allowable Parameter Variations:

• Current - Average Rectified (Io): Substitute must equal or exceed 200mA
• Voltage - Forward (Vf): Substitute value must not exceed the original specification at equivalent current levels
• Reverse Recovery Time (trr): Substitute may differ based on speed classification requirements
• Reverse Leakage Current: Substitute value may vary within acceptable limits for the application

The S1BFL from onsemi meets the mandatory matching criteria with a 100V reverse voltage rating and SOD-123F package. The substitute provides higher current capacity (1A versus 200mA), making it suitable for applications requiring equal or lower current draw than the original specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The CDSW19-G is the recommended choice for new designs. It maintains Active product status, ensuring long-term availability and manufacturer support. The component is RoHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), indicating no special storage or handling requirements.

Substitute Part Consideration: The S1BFL may be used as a substitute in existing designs or legacy applications where component availability is constrained. However, the following conditions apply:

• The S1BFL carries "Not For New Designs" status, indicating onsemi has discontinued active development and support for this part number.
• The substitute operates at higher current capacity (1A versus 200mA), which is acceptable for applications drawing ≤200mA.
• The substitute exhibits slower reverse recovery time (2µs versus 50ns), which may affect performance in high-frequency switching applications.
• The substitute has higher reverse leakage current (1µA versus 100nA), which may impact low-power or precision analog circuits.

Compliance Verification: Both parts maintain identical RoHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility. REACH status is unaffected for both components.

Frequently Asked Questions (FAQ)

Q: Can the S1BFL directly replace the CDSW19-G in all applications?

A: The S1BFL is electrically compatible for applications operating at or below 200mA current levels and 100V reverse voltage. However, the substitute's slower recovery time (2µs versus 50ns) and higher reverse leakage current (1µA versus 100nA) may affect performance in high-frequency switching or precision low-power circuits. Circuit validation is required for critical applications.

Q: What is the difference between SOD-123 and SOD-123F packages?

A: SOD-123F is a variant of the SOD-123 package with compatible footprints suitable for surface mount assembly. Both packages accommodate the same PCB land patterns, though SOD-123F may have slightly different lead geometry. Consult PCB layout guidelines for specific design requirements.

Q: Why does the S1BFL have "Not For New Designs" status?

A: This designation indicates that onsemi has discontinued active development and long-term support for the S1BFL. New designs should utilize the CDSW19-G or other actively supported alternatives to ensure component availability and manufacturer technical support throughout the product lifecycle.

Q: Are there compliance differences between the CDSW19-G and S1BFL?

A: Both components are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity levels. No compliance differences exist between the two parts.

Q: What applications are affected by the difference in reverse recovery time?

A: Applications involving high-frequency switching, RF circuits, or fast pulse generation may be sensitive to the 40x difference in reverse recovery time (50ns versus 2µs). Low-frequency rectification, power supply filtering, and general-purpose switching applications are typically unaffected by this parameter difference.

Q: Can the S1BFL be used in a circuit designed for 200mA operation?

A: Yes. The S1BFL is rated for 1A average rectified current, making it suitable for circuits operating at 200mA or lower. The higher current rating provides design margin and does not degrade performance in lower-current applications.