SD103CWS-7-F-79 Equivalent & Substitute Parts

Part Overview

The SD103CWS-7-F-79 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 20V DC reverse voltage with 350mA average rectified current in a surface mount SOD-123 package. This component is classified as obsolete product status. Locating equivalent and substitute parts is necessary to support ongoing design requirements, manufacturing continuity, and system maintenance where this diode is specified in active applications or legacy designs requiring component replenishment.

Substiute Parts

SD103CWS-7-F-79

Diodes IncorporatedIn Stock: 833SD103CWS-7-F-79 Datasheet

Current PartRFQ

SD103CWS-7-F

Diodes IncorporatedIn Stock: 104272SD103CWS-7-F Datasheet

SimilarRFQ

SD103CW-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1134SD103CW-G3-08 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD103CWS-7-F-79 are selected based on strict electrical and mechanical parameter matching within the Schottky rectifier diode category. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 20 V
• Current - Average Rectified (Io): 350 mA
• Voltage - Forward (Vf) (Max) @ If: 600 mV @ 200 mA
• Reverse Recovery Time (trr): 10 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 10 V
• Technology: Schottky

Mechanical Parameters (Must Match or Be Compatible):

• Mounting Type: Surface Mount
• Package / Case: SOD-123 or equivalent surface mount package

Substitute parts are grouped into two categories: direct package equivalents (same SOD-123 package) and package variants (alternative surface mount packages with identical electrical performance). All substitutes maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

SD103CWS-7-F (Diodes Incorporated): This substitute is an active product from the same manufacturer as the obsolete SD103CWS-7-F-79. It maintains identical electrical specifications and ROHS3 compliance. The primary difference is the package variant: SOD-323 instead of SOD-123. This substitute is suitable for applications where PCB layout can accommodate the SOD-323 footprint. The extended lower operating temperature range (-65°C minimum) provides additional thermal margin in cold environment applications.

SD103CW-G3-08 (Vishay General Semiconductor): This substitute is an active product from Vishay that matches all critical electrical parameters of the main part and maintains the original SOD-123 package. It is directly compatible with existing PCB designs specified for SOD-123 packages. ROHS3 compliance and MSL 1 rating are maintained. The capacitance specification differs at 50pF versus 28pF, which remains within acceptable parameters for Schottky rectifier applications. Operating temperature range matches the original specification.

Both substitutes are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity level), ensuring compatibility with standard handling and storage procedures.

Frequently Asked Questions (FAQ)

Q: Can SD103CWS-7-F be used as a direct replacement for SD103CWS-7-F-79?

A: SD103CWS-7-F is electrically equivalent but uses a different package (SOD-323 versus SOD-123). Direct PCB replacement requires footprint compatibility verification. If the original design specifies SOD-123, layout modification is necessary.

Q: What is the key difference between SD103CWS-7-F and SD103CW-G3-08?

A: Both parts are electrically equivalent with identical voltage, current, and recovery time specifications. SD103CWS-7-F is manufactured by Diodes Incorporated; SD103CW-G3-08 is manufactured by Vishay. SD103CWS-7-F uses SOD-323 packaging; SD103CW-G3-08 uses SOD-123 packaging. Capacitance differs: 28pF versus 50pF respectively.

Q: Is SD103CW-G3-08 compatible with existing SOD-123 PCB layouts?

A: Yes. SD103CW-G3-08 uses the SOD-123 package and is mechanically and electrically compatible with PCB designs specified for SOD-123 surface mount packages.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both SD103CWS-7-F and SD103CW-G3-08 are ROHS3 compliant with MSL 1 rating, matching the compliance profile of the original SD103CWS-7-F-79.

Q: What is the operating temperature range difference between substitutes?

A: SD103CWS-7-F operates from -65°C to 125°C. SD103CW-G3-08 operates from -55°C to 150°C, matching the original part. For applications requiring the full -55°C to 150°C range, SD103CW-G3-08 is the appropriate selection.

Q: Can capacitance difference between substitutes affect circuit performance?

A: SD103CWS-7-F specifies 28pF; SD103CW-G3-08 specifies 50pF at 0V, 1MHz. Both values are within acceptable parameters for Schottky rectifier applications. Circuit-specific analysis is required only if capacitance is a critical design parameter.

Q: What packaging formats are available for these substitutes?

A: SD103CWS-7-F is available in Cut Tape (CT) and Digi-Reel® formats. SD103CW-G3-08 is available in Tape & Reel (TR) format. Packaging selection depends on manufacturing and assembly requirements.