SD103CW-HE3-08 Equivalent & Substitute Parts

Part Overview

The SD103CW-HE3-08 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20 V DC reverse voltage and 350 mA average rectified current in a surface mount SOD-123 package. This part is classified as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for ongoing production and repair applications.

Key Parameters

Parameter	Value
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
Capacitance @ Vr, F	50 pF @ 0V, 1MHz
Package / Case	SOD-123
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SD103CW-HE3-08 is determined by the following critical parameters:

Parametric Equivalents (Same Current Rating - 350 mA):

SD103CW-HE3_A-08 (Vishay) - Identical electrical specifications with Active product status
SD103CW-E3-18 (Vishay) - Identical electrical specifications with full temperature range
SD103CW-G3-18 (Vishay) - Identical electrical specifications with full temperature range

Functional Substitutes (Higher Current Rating - 500 mA):

B0520LW-7-F (Diodes Incorporated)
CDBW0520L-G (Comchip Technology)
MBR0520-TP (Micro Commercial Co)
MBR0520L-TP (Micro Commercial Co)
MBR0520LT1G (onsemi)
MBR0520LT3G (onsemi)
SBR80520LT1G (onsemi)

All substitute parts maintain the 20 V DC reverse voltage rating and SOD-123 package configuration. Functional substitutes rated for 500 mA current provide design margin above the original 350 mA specification. All parts comply with ROHS3 and maintain automotive-grade qualification where applicable.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (mA)	Vf (Max) @ If	trr (ns)	Ir @ Vr	Package	Temp Range	Status
SD103CW-HE3-08	Vishay	20 V	350	600 mV @ 200 mA	10	5 µA @ 10 V	SOD-123	-55°C ~ 125°C	Last Time Buy
SD103CW-HE3_A-08	Vishay	20 V	350	600 mV @ 200 mA	10	5 µA @ 10 V	SOD-123	-55°C ~ 125°C	Active
SD103CW-E3-18	Vishay	20 V	350	600 mV @ 200 mA	10	5 µA @ 10 V	SOD-123	-55°C ~ 125°C	Active
SD103CW-G3-18	Vishay	20 V	350	600 mV @ 200 mA	10	5 µA @ 10 V	SOD-123	-55°C ~ 125°C	Active
B0520LW-7-F	Diodes Incorporated	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active
CDBW0520L-G	Comchip Technology	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-55°C ~ 125°C	Active
MBR0520-TP	Micro Commercial Co	20 V	500	450 mV @ 500 mA	≤ 500	200 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active
MBR0520L-TP	Micro Commercial Co	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active
MBR0520LT1G	onsemi	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active
MBR0520LT3G	onsemi	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active
SBR80520LT1G	onsemi	20 V	500	385 mV @ 500 mA	≤ 500	250 µA @ 20 V	SOD-123	-65°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Parametric Equivalents:

SD103CW-HE3_A-08, SD103CW-E3-18, and SD103CW-G3-18 are direct replacements for the SD103CW-HE3-08. All three parts are manufactured by Vishay and maintain identical electrical specifications including 350 mA current rating, 20 V reverse voltage, and 10 ns reverse recovery time. These parts carry Active product status, ensuring long-term availability. All are ROHS3 compliant and maintain automotive-grade qualification with AEC-Q101 certification.

Functional Substitutes with Higher Current Rating:

B0520LW-7-F, CDBW0520L-G, MBR0520-TP, MBR0520L-TP, MBR0520LT1G, MBR0520LT3G, and SBR80520LT1G are rated for 500 mA average rectified current, providing 43% additional current capacity above the original 350 mA specification. These parts maintain the 20 V reverse voltage rating and SOD-123 package configuration. All are Active products with ROHS3 compliance. Forward voltage characteristics vary across manufacturers, with values ranging from 385 mV to 450 mV at their respective rated currents. Operating temperature ranges extend to -65°C for most 500 mA variants, providing enhanced low-temperature performance.

Product Status Consideration:

The original SD103CW-HE3-08 is designated Last Time Buy. Selection of Active-status alternatives ensures continued component availability for production and field service applications.

Frequently Asked Questions (FAQ)

Q: Can SD103CW-E3-18 or SD103CW-G3-18 be used as direct replacements for SD103CW-HE3-08?

A: Yes. Both parts are manufactured by Vishay and maintain identical electrical specifications: 20 V reverse voltage, 350 mA average rectified current, 600 mV forward voltage at 200 mA, and 10 ns reverse recovery time. All three parts use SOD-123 packaging and operate across -55°C to 125°C. The primary difference is product status; SD103CW-HE3-08 is Last Time Buy while the alternatives are Active.

Q: What is the difference between 350 mA and 500 mA rated parts?

A: The 500 mA parts (B0520LW-7-F, CDBW0520L-G, MBR0520-TP, MBR0520L-TP, MBR0520LT1G, MBR0520LT3G, SBR80520LT1G) are rated for higher average rectified current. These parts maintain the same 20 V reverse voltage and SOD-123 package as the original 350 mA part. The higher current rating provides design margin for applications requiring current capacity above 350 mA. Forward voltage characteristics differ among manufacturers.

Q: Are all substitute parts automotive-grade?

A: The original SD103CW-HE3-08 carries automotive-grade qualification with AEC-Q101 certification. Substitute parts from Vishay (SD103CW-HE3_A-08, SD103CW-E3-18, SD103CW-G3-18) maintain this qualification. Substitute parts from other manufacturers (Diodes Incorporated, Comchip Technology, Micro Commercial Co, onsemi) are specified as Active products with ROHS3 compliance. Automotive qualification status for non-Vishay parts should be confirmed against specific application requirements.

Q: What packaging options are available for substitutes?

A: All substitute parts use SOD-123 surface mount packaging, matching the original SD103CW-HE3-08. Packaging format variations include Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel options, which affect supply chain handling but do not alter electrical or mechanical compatibility.

Q: How do forward voltage characteristics compare across manufacturers?

A: Forward voltage varies by manufacturer at rated current. Vishay parts specify 600 mV at 200 mA. Among 500 mA rated parts, forward voltage ranges from 385 mV (B0520LW-7-F, CDBW0520L-G, MBR0520L-TP, MBR0520LT1G, MBR0520LT3G, SBR80520LT1G) to 450 mV (MBR0520-TP) at 500 mA. Lower forward voltage reduces power dissipation in high-current applications.

Q: What is the reverse leakage current specification across substitutes?

A: The original SD103CW-HE3-08 specifies 5 µA reverse leakage at 10 V. Vishay parametric equivalents maintain this specification. Among 500 mA rated parts, reverse leakage ranges from 200 µA (MBR0520-TP) to 250 µA (B0520LW-7-F, CDBW0520L-G, MBR0520L-TP, MBR0520LT1G, MBR0520LT3G, SBR80520LT1G) at 20 V. Higher reverse leakage in 500 mA parts reflects different semiconductor process technology.

Q: Are all parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance status. The original SD103CW-HE3-08 is also ROHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage and handling.

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