SS23LHMTG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS23LHMTG is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 30V DC reverse voltage and 2A average rectified current in a Sub SMA surface mount package. This component is designed for fast recovery applications with forward voltage of 500 mV at 2A and operates across a junction temperature range of -55°C to 150°C. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant.

Equivalent and substitute parts are identified when alternative manufacturers offer Schottky diodes with compatible electrical ratings and mechanical packaging that satisfy the same circuit requirements. Substitution becomes necessary due to supply availability, lead time considerations, or design flexibility across manufacturing sources.

Substiute Parts

SS23LHMTG

Taiwan Semiconductor CorporationIn Stock: 697SS23LHMTG Datasheet

Current PartRFQ

SL03-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 25204SL03-GS18 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS23LHMTG is determined by equivalence in the following critical parameters:

Voltage Rating: Both the main part and substitute must maintain a DC reverse voltage (Vr) rating of 30V to ensure safe operation in the target circuit.

Package and Mounting: The DO-219AB package with surface mount technology is the mechanical constraint. Substitute parts must use identical or functionally equivalent packaging to ensure PCB compatibility without redesign.

Technology Type: Schottky diode technology is required to maintain the fast recovery characteristics and forward voltage profile of the original design.

Current Handling: The average rectified current (Io) rating determines thermal and electrical performance. Substitutes with equal or higher current ratings are acceptable; lower ratings are not.

Temperature Range: Operating junction temperature specifications must support the application's thermal environment. The main part operates from -55°C to 150°C.

Compliance Standards: Active product status, AEC-Q101 automotive qualification, and ROHS3 compliance are required for equivalent substitution in regulated applications.

The SL03-GS18 from Vishay General Semiconductor meets these substitution criteria with matching voltage rating, package type, Schottky technology, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (SS23LHMTG): Retain the SS23LHMTG for applications requiring the full 2A current rating, automotive-grade qualification with AEC-Q101 certification, and maximum junction temperature operation to 150°C. This part is active in production with established supply availability.

Substitute Selection (SL03-GS18): The SL03-GS18 is suitable for applications where the circuit current requirement does not exceed 1.1A. This substitute offers equivalent voltage rating, matching DO-219AB package, and identical fast recovery speed characteristics. The SL03-GS18 provides lower forward voltage (430 mV versus 500 mV) and reduced reverse leakage current (130 µA versus 400 µA), which may improve efficiency in power conversion applications. However, the maximum junction temperature of 125°C is lower than the main part's 150°C rating. Both parts maintain ROHS3 compliance and active product status.

Substitution is valid only when circuit design parameters accommodate the lower current rating and maximum temperature specification of the SL03-GS18.

Frequently Asked Questions (FAQ)

Q: Can the SL03-GS18 directly replace the SS23LHMTG in all applications?

A: Direct replacement is valid only if the circuit current requirement does not exceed 1.1A and the maximum junction temperature does not approach 125°C. The SL03-GS18 has a lower current rating (1.1A versus 2A) and lower maximum junction temperature (125°C versus 150°C). Applications designed for the full 2A capacity of the SS23LHMTG require the original part or an equivalent with matching current specifications.

Q: Are the packages physically identical?

A: Both parts use the DO-219AB package with surface mount technology. Physical dimensions and PCB footprints are compatible, allowing direct substitution without layout modification.

Q: What is the difference in forward voltage between these parts?

A: The SS23LHMTG specifies 500 mV forward voltage at 2A, while the SL03-GS18 specifies 430 mV at 1.1A. Forward voltage varies with current; direct comparison at different current levels is not applicable. The SL03-GS18 exhibits lower forward voltage at its rated current, which may reduce power dissipation in applications operating at or below 1.1A.

Q: Does the SL03-GS18 meet automotive qualification requirements?

A: The SL03-GS18 specifications provided do not include automotive-grade designation or AEC-Q101 qualification. The SS23LHMTG carries explicit automotive qualification. Applications requiring automotive-grade components must use the SS23LHMTG or confirm equivalent automotive qualification for alternative parts through the manufacturer.

Q: What is the significance of reverse leakage current differences?

A: The SS23LHMTG specifies 400 µA reverse leakage at 30V, while the SL03-GS18 specifies 130 µA at the same voltage. Lower reverse leakage reduces standby power consumption and improves circuit efficiency. The SL03-GS18 provides superior leakage performance in this parameter.

Q: Can I use the SL03-GS18 in a high-temperature application requiring 150°C operation?

A: No. The SL03-GS18 maximum junction temperature is 125°C. Applications requiring sustained operation at 150°C must use the SS23LHMTG or an equivalent part with matching temperature specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the SS23LHMTG and SL03-GS18 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for electronic components.