SD103AW Equivalent & Substitute Parts

Part Overview

The SD103AW is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the SOD-123 package. This component operates at a maximum reverse voltage of 40V with an average rectified current rating of 350mA, making it suitable for low-voltage power conversion and signal protection circuits. The device is classified as Active product status and maintains full RoHS3 and REACH compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	350 mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 40 V
Capacitance @ Vr, F	50pF @ 0V, 1MHz
Package / Case	SOD-123
Mounting Type	Surface Mount
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SD103AW are identified based on strict electrical and mechanical parameter equivalence. The substitution criteria are:

Primary Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 350 mA
Voltage - Forward (Vf) (Max) @ If: 600 mV @ 200 mA
Package / Case: SOD-123
Mounting Type: Surface Mount
Technology: Schottky

Secondary Compatibility Parameters:

Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 5 µA
Capacitance @ Vr, F: 50pF @ 0V, 1MHz

Parts meeting all primary equivalence parameters and secondary compatibility parameters are classified as direct substitutes. The SD103AW-G3-08 manufactured by Vishay General Semiconductor - Diodes Division satisfies all specified electrical and mechanical requirements for direct substitution.

Parameter Comparison

Parameter	SD103AW (Taiwan Semiconductor)	SD103AW-G3-08 (Vishay)
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io)	350 mA	350 mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	600 mV @ 200 mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 40 V	5 µA @ 30 V
Capacitance @ Vr, F	50pF @ 0V, 1MHz	50pF @ 0V, 1MHz
Package / Case	SOD-123	SOD-123
Mounting Type	Surface Mount	Surface Mount
Technology	Schottky	Schottky
Reverse Recovery Time (trr)	Not specified	10 ns
Operating Temperature - Junction	125°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the SD103AW and SD103AW-G3-08 are Active product status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on application requirements and supply chain availability.

The SD103AW (Taiwan Semiconductor Corporation) is suitable for applications where standard operating temperature range and bulk packaging are acceptable. This part maintains 185,300 pieces in current inventory.

The SD103AW-G3-08 (Vishay General Semiconductor - Diodes Division) provides an extended operating temperature range of -55°C to 150°C compared to the 125°C maximum junction temperature of the SD103AW, and includes specified reverse recovery time of 10 nanoseconds. This part is supplied in Tape & Reel packaging and maintains 17,300 pieces in current inventory. The Vishay variant is suitable for applications requiring extended temperature performance or where tape and reel packaging is specified.

Both parts satisfy identical electrical specifications for voltage, current, forward voltage drop, and switching speed characteristics. Selection should be based on packaging format requirements, temperature operating range, and component availability.

Frequently Asked Questions (FAQ)

Q: Can the SD103AW-G3-08 be used as a direct replacement for the SD103AW?

A: Yes. Both parts are Schottky rectifier diodes with identical voltage ratings (40V), current ratings (350mA), forward voltage characteristics (600mV @ 200mA), and package type (SOD-123). All primary electrical specifications match. The Vishay part provides extended temperature range (-55°C to 150°C versus 125°C) and specified reverse recovery time (10ns), making it functionally equivalent or superior for most applications.

Q: What is the difference in packaging between these parts?

A: The SD103AW is supplied in standard packaging format. The SD103AW-G3-08 is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Both use the SOD-123 surface mount package. Selection depends on assembly equipment and procurement requirements.

Q: Are there any compliance differences between these parts?

A: No. Both parts are RoHS3 compliant and REACH unaffected. Both carry the same ECCN (EAR99) and HTSUS (8541.10.0070) classifications.

Q: What is the significance of the reverse recovery time specification?

A: The SD103AW-G3-08 specifies a reverse recovery time (trr) of 10 nanoseconds. This parameter is not specified for the SD103AW. Reverse recovery time affects switching speed in high-frequency applications. The 10ns specification for the Vishay part indicates fast switching performance consistent with the Fast Recovery classification shared by both parts.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, for applications operating within the SD103AW's temperature range (up to 125°C junction temperature). The electrical characteristics are identical. For applications requiring operation below -55°C or above 125°C, only the SD103AW-G3-08 is suitable.

Q: What is the reverse leakage current difference?

A: The SD103AW specifies 5µA @ 40V. The SD103AW-G3-08 specifies 5µA @ 30V. Both parts meet the same leakage specification at their respective rated voltages, indicating equivalent leakage performance.

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