SD103CWS-7 Equivalent & Substitute Parts

Part Overview

The SD103CWS-7 is a Schottky rectifier diode rated for 20 V DC reverse voltage and 350 mA average rectified current in a surface mount SOD-323 package. Manufactured by Diodes Incorporated, this component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part exhibits fast recovery characteristics with a reverse recovery time of 10 ns, making it suitable for high-frequency switching applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	350	mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	mV @ mA
Reverse Recovery Time (trr)	10	ns
Current - Reverse Leakage @ Vr	5	µA @ 10 V
Technology	Schottky	—
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 125°C	°C

Substitute Part Grouping Explanation

Substitution of the SD103CWS-7 is determined by the following critical parameters: voltage rating (20 V minimum), package type (SOD-323), mounting method (surface mount), and technology (Schottky). Parts are grouped into three categories based on current rating and electrical characteristics:

Category 1: Direct Parametric Equivalents (350 mA Rating) Parts matching the exact 350 mA current specification with identical voltage and package specifications. These parts are pin-compatible and electrically interchangeable without circuit modification.

Category 2: Higher Current Rated Substitutes (500 mA to 2 A Rating) Parts exceeding the 350 mA specification while maintaining the 20 V voltage rating and SOD-323 package. These substitutes provide increased current capacity and are suitable for applications requiring design margin or future current expansion. Forward voltage characteristics may differ.

Category 3: Automotive Grade Alternatives Parts qualified to AEC-Q100 automotive standards with enhanced temperature ranges and reliability certifications. These are suitable for automotive and high-reliability applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [mV]	trr [ns]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
SD103CWS-7	Diodes Incorporated	20	350	600 @ 200 mA	10	5 @ 10 V	SOD-323	Discontinued	Non-compliant
SD103CWS-7-F	Diodes Incorporated	20	350	600 @ 200 mA	10	5 @ 10 V	SOD-323	Active	ROHS3 Compliant
SD103CWS-E3-08	Vishay General Semiconductor	20	350	600 @ 200 mA	10	5 @ 10 V	SOD-323	Active	ROHS3 Compliant
SD103CWS-TP	Micro Commercial Co	20	350	600 @ 200 mA	10	5 @ 10 V	SOD-323	Active	ROHS3 Compliant
BAT760,115	Nexperia USA Inc.	20	1000	550 @ 1 A	≤500	50 @ 15 V	SOD-323	Active	ROHS3 Compliant
PMEG2005AEA,115	Nexperia USA Inc.	20	500	390 @ 500 mA	≤500	200 @ 20 V	SOD-323	Active	ROHS3 Compliant
PMEG2010BEA,115	Nexperia USA Inc.	20	1000	500 @ 1 A	≤500	200 @ 20 V	SOD-323	Active	ROHS3 Compliant
PMEG2010EA,115	Nexperia USA Inc.	20	1000	550 @ 1 A	≤500	50 @ 15 V	SOD-323	Active	ROHS3 Compliant
PMEG2015EA,115	Nexperia USA Inc.	20	1500	660 @ 1.5 A	≤500	50 @ 15 V	SOD-323	Active	ROHS3 Compliant
PMEG2020AEA,115	Nexperia USA Inc.	20	2000	525 @ 2 A	≤500	200 @ 20 V	SOD-323	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, No Circuit Modification Required):

The SD103CWS-7-F is the primary recommended substitute. Manufactured by Diodes Incorporated, it maintains identical electrical specifications (20 V, 350 mA, 10 ns recovery time) and is available in active production status with ROHS3 compliance. This part is a direct functional equivalent with no design changes required.

Alternative direct replacements include SD103CWS-E3-08 (Vishay General Semiconductor) and SD103CWS-TP (Micro Commercial Co), both offering identical parametric specifications and active product status with ROHS3 compliance.

For Applications Requiring Higher Current Capacity:

The PMEG2005AEA,115 (500 mA) provides the next step in current rating while maintaining the 20 V specification and SOD-323 package. This part is suitable for designs requiring modest current margin above the original 350 mA specification.

The PMEG2010 series (1 A rating) and PMEG2020AEA,115 (2 A rating) accommodate applications with significantly higher current requirements. These parts maintain voltage compatibility and package form factor while providing substantial current headroom.

For Automotive and High-Reliability Applications:

Parts qualified to AEC-Q100 automotive standards include PMEG2010BEA,115, PMEG2010EA,115, PMEG2015EA,115, and PMEG2020AEA,115. These components are suitable for automotive-grade designs and applications requiring enhanced reliability certifications. All maintain the 20 V voltage rating and SOD-323 package specification.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing the non-compliant status of the original SD103CWS-7. This compliance status is mandatory for new designs and production continuity in regulated markets.

Frequently Asked Questions (FAQ)

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

A: Yes. The SD103CWS-7-F is a direct parametric equivalent with identical voltage (20 V), current (350 mA), reverse recovery time (10 ns), and package specifications (SOD-323). No circuit modifications are required. The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: What is the difference between the direct equivalents (SD103CWS-7-F, SD103CWS-E3-08, SD103CWS-TP)?

A: All three parts share identical electrical specifications and package type. Differences exist in manufacturer (Diodes Incorporated, Vishay, and Micro Commercial Co respectively) and packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Selection depends on supplier availability, packaging requirements, and procurement preferences.

Q: Can I use a higher current rated part like PMEG2010EA,115 (1 A) instead of the 350 mA SD103CWS-7?

A: Yes, higher current rated parts are suitable substitutes. The PMEG2010EA,115 maintains the 20 V voltage rating and SOD-323 package, providing increased current capacity. This substitution is appropriate for applications requiring design margin or future current expansion. Forward voltage characteristics differ slightly (550 mV @ 1 A versus 600 mV @ 200 mA), which may affect circuit performance in voltage-sensitive applications.

Q: Are automotive-grade parts (AEC-Q100 qualified) interchangeable with standard parts?

A: Yes. Automotive-grade parts such as PMEG2010BEA,115 and PMEG2020AEA,115 are electrically interchangeable with standard-grade equivalents. These parts offer enhanced reliability certifications and extended temperature ranges, making them suitable for automotive applications and high-reliability designs. They are appropriate substitutes for non-automotive applications as well.

Q: What is the significance of the SOD-323 package specification?

A: The SOD-323 package is a surface mount form factor with specific pin configuration and footprint dimensions. All recommended substitutes maintain this package type, ensuring mechanical and electrical compatibility with existing printed circuit board layouts. No PCB redesign is required when substituting between parts with identical SOD-323 packaging.

Q: How do reverse leakage current differences affect substitution?

A: The original SD103CWS-7 specifies 5 µA reverse leakage at 10 V. Some substitutes (PMEG2005AEA,115, PMEG2010BEA,115, PMEG2020AEA,115) specify 200 µA at 20 V, representing higher leakage. In most applications, this difference is negligible. In high-impedance or precision analog circuits, leakage current differences may require circuit evaluation.

Q: What packaging formats are available for these substitutes?

A: Substitutes are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel formats. Tape & Reel packaging is standard for high-volume production. Cut Tape & Digi-Reel format is suitable for lower-volume requirements and prototyping. Selection depends on production volume and procurement requirements.

Q: Is RoHS compliance mandatory for selecting a substitute?

A: For new designs and production in regulated markets, ROHS3 compliance is mandatory. All recommended substitutes are ROHS3 compliant. The original SD103CWS-7 is non-compliant, making compliance-rated substitutes necessary for regulatory adherence.

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