SD103CW-E3-18 Equivalent & Substitute Parts

Part Overview

The SD103CW-E3-18 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20V DC reverse voltage and 350mA 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 become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative electrical characteristics such as higher current ratings or different forward voltage specifications. The following equivalent and substitute parts maintain compatibility with the SD103CW-E3-18 within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
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	—
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SD103CW-E3-18 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Technology: Schottky diode
Package / Case: SOD-123 surface mount
Voltage - DC Reverse (Vr) (Max): 20V minimum
Mounting Type: Surface Mount

Allowable Variation Parameters:

Current - Average Rectified (Io): Equal to or greater than 350mA
Voltage - Forward (Vf): Equal to or less than 600mV at rated current
Reverse Recovery Time (trr): Equal to or less than 10ns
Current - Reverse Leakage @ Vr: Equal to or less than 5µA at 10V
Operating Temperature - Junction: Must encompass -55°C to 125°C range

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (350mA Rating): Parts maintaining identical 350mA current rating with matching electrical characteristics. These include SD103CW-HE3-08, SD103CW-TP, and SD103CWHE3-TP.

Category 2 - Higher Current Rated Substitutes (500mA Rating): Parts with 500mA current rating that exceed the minimum requirements of the SD103CW-E3-18. These include CDBW0520L-G, MBR0520-TP, MBR0520L-TP, SBR80520LT1G, and SBR80520LT3G. These parts are suitable for applications where higher current capacity provides design margin or future scalability.

Category 3 - Direct Manufacturer Equivalent: SD103CW-13-F from Diodes Incorporated maintains 350mA rating with identical electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
SD103CW-E3-18	Vishay	20	350	600 @ 200mA	10	5 @ 10V	SOD-123	-55 to 125	Active
SD103CW-HE3-08	Vishay	20	350	600 @ 200mA	10	5 @ 10V	SOD-123	-55 to 125	Last Time Buy
SD103CW-13-F	Diodes Inc	20	350	600 @ 200mA	10	5 @ 10V	SOD-123	-65 to 125	Active
SD103CW-TP	Micro Commercial Co	20	350	600 @ 200mA	10	5 @ 10V	SOD-123	-55 to 125	Active
SD103CWHE3-TP	Micro Commercial Co	20	350	600 @ 200mA	10	5 @ 10V	SOD-123	-55 to 125	Active
CDBW0520L-G	Comchip Technology	20	500	385 @ 500mA	≤500	250 @ 20V	SOD-123	—	Active
MBR0520-TP	Micro Commercial Co	20	500	450 @ 500mA	≤500	200 @ 20V	SOD-123	-65 to 125	Active
MBR0520L-TP	Micro Commercial Co	20	500	385 @ 500mA	≤500	250 @ 20V	SOD-123	-65 to 125	Active
SBR80520LT1G	onsemi	20	500	385 @ 500mA	≤500	250 @ 20V	SOD-123	-65 to 125	Active
SBR80520LT3G	onsemi	20	500	385 @ 500mA	≤500	250 @ 20V	SOD-123	-65 to 125	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SD103CW-13-F from Diodes Incorporated is the primary direct substitute, maintaining 350mA current rating with identical electrical specifications. This part is Active status with extended temperature range (-65°C to 125°C) and is RoHS3 compliant. SD103CW-TP and SD103CWHE3-TP from Micro Commercial Co provide equivalent parametric performance with Active status.

SD103CW-HE3-08 from Vishay maintains full electrical equivalence but carries Last Time Buy status, indicating limited future availability. This part includes automotive-grade qualification (AEC-Q101) and is suitable for applications requiring automotive-level reliability.

For Higher Current Capacity Applications:

CDBW0520L-G, MBR0520-TP, MBR0520L-TP, SBR80520LT1G, and SBR80520LT3G all provide 500mA current rating while maintaining 20V reverse voltage rating and SOD-123 package compatibility. These parts are suitable for designs requiring increased current margin or future scalability beyond the 350mA specification.

MBR0520L-TP offers the highest inventory availability (102,150 pieces) among higher-current substitutes and maintains Active product status with -65°C to 125°C operating range.

SBR80520LT1G and SBR80520LT3G from onsemi provide identical electrical characteristics with 500mA rating and Active status.

All substitute parts listed are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the primary part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can I use a 500mA rated diode as a direct replacement for the 350mA SD103CW-E3-18?

A: Yes. The 500mA rated parts (CDBW0520L-G, MBR0520-TP, MBR0520L-TP, SBR80520LT1G, SBR80520LT3G) are electrically compatible substitutes. Higher current rating provides design margin and does not create incompatibility. All maintain 20V reverse voltage rating, SOD-123 package, and surface mount configuration. Forward voltage characteristics differ slightly but remain within acceptable ranges for most applications.

Q: What is the difference between SD103CW-E3-18 and SD103CW-13-F?

A: Both parts maintain identical electrical specifications: 20V reverse voltage, 350mA current rating, 600mV forward voltage at 200mA, and 10ns reverse recovery time. The primary differences are manufacturer (Vishay versus Diodes Incorporated) and operating temperature range (SD103CW-13-F extends to -65°C minimum versus -55°C for SD103CW-E3-18). Both are Active status and RoHS3 compliant.

Q: Are all substitute parts available in the same SOD-123 package?

A: Yes. All listed substitute parts use SOD-123 surface mount package, ensuring mechanical and footprint compatibility with the SD103CW-E3-18.

Q: What does "Last Time Buy" status mean for SD103CW-HE3-08?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. Existing inventory remains available, but no future production is planned. This part is suitable for current designs but should not be selected for new long-term production programs. Active status alternatives such as SD103CW-13-F or SD103CW-TP are recommended for new designs.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts carry RoHS3 Compliant status, matching the primary part's environmental compliance profile.

Q: What is the significance of AEC-Q101 qualification on SD103CW-HE3-08 and SD103CWHE3-TP?

A: AEC-Q101 is the automotive electronics council qualification standard for discrete semiconductors. Parts carrying this qualification have undergone additional reliability testing and are suitable for automotive applications. This qualification is present on SD103CW-HE3-08 and SD103CWHE3-TP but not on the primary SD103CW-E3-18 part.

Q: Can I substitute based on forward voltage alone?

A: No. Substitution requires matching or exceeding all critical parameters: 20V reverse voltage rating, SOD-123 package, surface mount configuration, and current rating equal to or greater than 350mA. Forward voltage is one consideration among multiple electrical characteristics. Parts with lower forward voltage (such as the 500mA rated options at 385mV) are acceptable substitutes.

Q: What inventory considerations should guide my selection?

A: MBR0520L-TP offers the highest inventory availability (102,150 pieces) among all listed substitutes. SD103CW-E3-18 maintains 10,965 pieces in stock. For applications requiring immediate availability or long-term supply security, MBR0520L-TP provides both higher current capacity and superior inventory position.

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