SD103CW-E3-08 Equivalent & Substitute Parts

Part Overview

The SD103CW-E3-08 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20 V DC reverse voltage and packaged in SOD-123 surface mount configuration. This component is classified as Active product status with ROHS3 compliance and 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 SD103CW-E3-08 serves as a reference point for identifying functionally compatible alternatives within the Schottky diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
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	µA @ V
Capacitance @ Vr, F	50 pF @ 0V, 1MHz	pF @ V, MHz
Package / Case	SOD-123	—
Operating Temperature - Junction (Max)	125	°C
Technology	Schottky	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the SD103CW-E3-08 is based on the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V minimum
Package / Case: SOD-123 or SOD-123F (compatible surface mount packages)
Technology: Schottky diode
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): ≤ 10 ns preferred
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Current - Average Rectified (Io): Equal or higher rating acceptable
Voltage - Forward (Vf) (Max) @ If: Within ±100 mV of reference acceptable
Operating Temperature - Junction: ≥ 125°C acceptable
Current - Reverse Leakage @ Vr: ≤ 250 µA @ rated voltage acceptable

Substitute parts are grouped into two categories: direct replacements with identical electrical characteristics and functional equivalents with enhanced current ratings or improved thermal performance. All listed substitutes maintain SOD-123 package compatibility and meet ROHS3 compliance requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [mV @ mA]	trr [ns]	Ir @ Vr [µA @ V]	Package	Tj (Max) [°C]	Product Status
SD103CW-E3-08	Vishay General Semiconductor	20	—	600 @ 200	10	5 @ 10	SOD-123	125	Active
SD103CW-HE3-08	Vishay General Semiconductor	20	350	600 @ 200	10	5 @ 10	SOD-123	125	Last Time Buy
SD103CW-7-F	Diodes Incorporated	20	350	600 @ 200	10	5 @ 10	SOD-123	125	Active
B0520LWQ-7-F	Diodes Incorporated	20	500	385 @ 500	10	250 @ 20	SOD-123	125	Active
BAT30KFILM	STMicroelectronics	30	300	530 @ 300	10	5 @ 30	SOD-523	150	Active
CDBW0520L-G	Comchip Technology	20	500	385 @ 500	10	250 @ 20	SOD-123	125	Active
MBR0520-TP	Micro Commercial Co	20	500	450 @ 500	10	200 @ 20	SOD-123	125	Active
MBR0520L-TP	Micro Commercial Co	20	500	385 @ 500	10	250 @ 20	SOD-123	125	Active
PMEG2005EH,115	Nexperia USA Inc.	20	500	390 @ 500	10	200 @ 20	SOD-123F	150	Active
SBR80520LT1G	onsemi	20	500	385 @ 500	10	250 @ 20	SOD-123	125	Active

Engineering Selection Recommendations

Active Status Substitutes (Preferred Selection):

The following parts maintain Active product status and are recommended for new designs and ongoing production:

SD103CW-7-F (Diodes Incorporated): Direct functional equivalent with 350 mA current rating, identical voltage and recovery time specifications, Active status. Suitable for applications requiring Diodes Incorporated supply chain qualification.
B0520LWQ-7-F (Diodes Incorporated): Enhanced current rating of 500 mA with improved forward voltage (385 mV @ 500 mA), AEC-Q101 automotive qualification, Active status. Applicable for higher current applications within 20 V rating.
CDBW0520L-G (Comchip Technology): 500 mA rated Schottky diode with 385 mV forward voltage, SOD-123 package, Active status. Suitable for cost-optimized designs with higher current requirements.
MBR0520L-TP (Micro Commercial Co): 500 mA rated device with 385 mV forward voltage and 170 pF capacitance, Active status. Highest inventory availability (102,150 pcs) among 500 mA alternatives.
PMEG2005EH,115 (Nexperia USA Inc.): 500 mA rated Schottky in SOD-123F package with 150°C maximum junction temperature, Active status. Suitable for thermal-constrained applications.
SBR80520LT1G (onsemi): 500 mA rated device with 385 mV forward voltage, Active status. Applicable for onsemi-qualified supply chains.

Last Time Buy Status (Transition Required):

SD103CW-HE3-08 (Vishay General Semiconductor): Last Time Buy status indicates end-of-life trajectory. Existing inventory (17,100 pcs) available but no long-term supply assurance. Transition to Active alternatives recommended for new designs.

Package Compatibility Note:

BAT30KFILM uses SOD-523 package (not SOD-123) and 30 V rating. This part is not a direct substitute due to package incompatibility with SOD-123 footprints, despite meeting voltage and current criteria.

Frequently Asked Questions (FAQ)

Q: Can SD103CW-7-F directly replace SD103CW-E3-08 in existing designs?

A: Yes. SD103CW-7-F maintains identical voltage (20 V), recovery time (10 ns), and forward voltage (600 mV @ 200 mA) specifications. Both use SOD-123 package. The primary difference is manufacturer (Diodes Incorporated vs. Vishay). Verify PCB footprint compatibility with your design documentation.

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

A: Current rating indicates maximum average rectified current the diode can conduct continuously. A 500 mA rated device (B0520LWQ-7-F, CDBW0520L-G, MBR0520L-TP, PMEG2005EH,115, SBR80520LT1G) can replace a lower-rated device in applications requiring higher current. However, forward voltage may differ at higher current levels. Verify thermal dissipation capability in your circuit.

Q: Why does PMEG2005EH,115 use SOD-123F package instead of SOD-123?

A: SOD-123F is a variant of SOD-123 with enhanced thermal characteristics. Both packages are mechanically and electrically compatible on standard SOD-123 PCB footprints. SOD-123F provides improved heat dissipation for applications with higher power dissipation requirements.

Q: Is BAT30KFILM a suitable substitute?

A: BAT30KFILM is not recommended as a direct substitute. While it meets voltage and current criteria (30 V, 300 mA), it uses SOD-523 package, which is physically incompatible with SOD-123 PCB footprints. Additionally, the 30 V rating exceeds the 20 V requirement, introducing unnecessary design margin.

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

A: Last Time Buy indicates the manufacturer will discontinue production after current inventory depletes. Existing stock (17,100 pcs) is available, but no replenishment is guaranteed. For new designs or long-term production, select from Active status alternatives to ensure supply continuity.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the SD103CW-E3-08 environmental and regulatory requirements.

Q: Which substitute offers the lowest forward voltage?

A: B0520LWQ-7-F, CDBW0520L-G, MBR0520L-TP, PMEG2005EH,115, and SBR80520LT1G all specify 385 mV forward voltage at 500 mA, compared to 600 mV @ 200 mA for the reference part. This represents improved efficiency at higher current levels.

Q: Can I use a 500 mA rated diode in a circuit designed for the SD103CW-E3-08?

A: Yes, provided the circuit's current demand does not exceed the original design specification. Higher-rated devices are backward compatible in lower-current applications. Verify that thermal dissipation design accommodates the substitute part's power characteristics.

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