SS23L MQG Equivalent & Substitute Parts

Part Overview

The SS23L MQG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 30 V DC reverse voltage and 2 A average rectified current in a surface mount Sub SMA package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical ratings, package compatibility, and thermal specifications to support design flexibility and supply chain continuity for Schottky diode applications requiring fast recovery characteristics in the 30 V, 1 A to 2 A current range.

Key Parameters

Parameter	Value
Manufacturer Part Number	SS23L MQG
Manufacturer	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	400 µA @ 30 V
Mounting Type	Surface Mount
Package / Case	DO-219AB
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SS23L MQG are identified based on the following critical parameters:

Voltage Rating Compatibility: All substitute parts maintain the 30 V DC reverse voltage maximum rating, ensuring electrical compatibility in circuits designed for this voltage class.

Package Compatibility: All substitute parts use the DO-219AB surface mount package, enabling direct mechanical and electrical interchange on printed circuit boards designed for the SS23L MQG.

Fast Recovery Characteristic: All substitute parts meet the fast recovery specification of ≤ 500 ns at currents > 200 mA (Io), maintaining switching performance requirements.

Current Rating Categories: Substitute parts are grouped by average rectified current rating:

1 A rated parts: SS1FL3-M3/H, SS1FL3HM3/H, SL03-GS18
2 A rated parts: SS2FL3-M3/H, SS2FL3HM3/H

Compliance Standards: All substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental and regulatory status of the main part.

Operating Temperature Range: Substitute parts maintain the -55°C to 150°C junction temperature operating range, with the exception of SL03-GS18 which specifies 125°C maximum.

Parameter Comparison

Parameter	SS23L MQG	SS1FL3-M3/H	SS1FL3HM3/H	SS2FL3-M3/H	SS2FL3HM3/H	SL03-GS18
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V	30 V	30 V
Current - Average Rectified (Io)	2 A	1 A	1 A	2 A	2 A	1.1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	480 mV @ 1 A	480 mV @ 1 A	540 mV @ 2 A	540 mV @ 2 A	430 mV @ 1.1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	400 µA @ 30 V	200 µA @ 30 V	200 µA @ 30 V	200 µA @ 30 V	200 µA @ 30 V	130 µA @ 30 V
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	125°C (Max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Current Rating Equivalents (2 A): The SS2FL3-M3/H and SS2FL3HM3/H are direct electrical equivalents to the SS23L MQG, both rated for 2 A average rectified current at 30 V reverse voltage. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain full compliance with ROHS3 and REACH requirements. The SS2FL3HM3/H carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability.

Lower Current Rating Alternatives (1 A): The SS1FL3-M3/H and SS1FL3HM3/H are rated for 1 A average rectified current and are suitable for applications where the full 2 A capability of the SS23L MQG is not required. These parts provide lower forward voltage drop (480 mV @ 1 A versus 500 mV @ 2 A) and reduced reverse leakage current (200 µA versus 400 µA). The SS1FL3HM3/H includes AEC-Q101 automotive qualification.

Intermediate Current Rating Alternative (1.1 A): The SL03-GS18 is rated for 1.1 A average rectified current and offers the lowest forward voltage drop (430 mV @ 1.1 A) and reverse leakage current (130 µA @ 30 V) among all substitute parts. This part is supplied in Tape & Reel packaging. The maximum operating junction temperature is specified as 125°C, which is lower than the -55°C to 150°C range of the main part.

Packaging Considerations: The SS23L MQG is specified with Sub SMA supplier device package designation. All substitute parts use the DO-219AB (SMF) package, which is mechanically and electrically compatible with the DO-219AB footprint. Packaging format differences (Cut Tape & Digi-Reel versus Tape & Reel) do not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SS1FL3-M3/H or SS1FL3HM3/H be used as direct replacements for SS23L MQG in a 2 A application?

A: No. The SS1FL3-M3/H and SS1FL3HM3/H are rated for 1 A average rectified current, while the SS23L MQG is rated for 2 A. Using a 1 A rated part in a circuit designed for 2 A operation will result in device overstress and potential failure. These parts are suitable only for applications requiring 1 A or less.

Q: What is the difference between SS2FL3-M3/H and SS2FL3HM3/H?

A: Both parts are rated for 2 A at 30 V and share identical electrical specifications. The primary difference is that SS2FL3HM3/H carries AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging, while SS2FL3-M3/H is supplied in Tape & Reel packaging without automotive qualification. Both are ROHS3 compliant and maintain the -55°C to 150°C operating temperature range.

Q: Is the SL03-GS18 suitable for applications requiring the full -55°C to 150°C operating temperature range?

A: No. The SL03-GS18 specifies a maximum operating junction temperature of 125°C, which does not cover the full -55°C to 150°C range of the SS23L MQG. This part is suitable only for applications with maximum junction temperatures of 125°C or lower.

Q: Are all substitute parts compatible with the same PCB footprint as the SS23L MQG?

A: Yes. All substitute parts use the DO-219AB surface mount package, which is mechanically and electrically compatible with the DO-219AB footprint. Direct board-level substitution is supported without PCB redesign.

Q: What is the significance of the fast recovery specification (≤ 500 ns)?

A: The fast recovery specification indicates the time required for the diode to transition from forward conduction to reverse blocking state. All listed parts, including the SS23L MQG and all substitutes, meet this specification at currents greater than 200 mA (Io), ensuring consistent switching performance in fast-switching applications.

Q: Do all substitute parts meet the same environmental compliance standards as the SS23L MQG?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental and regulatory status of the SS23L MQG. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts.

Q: What is the difference in forward voltage drop between the SS23L MQG and the substitute parts?

A: Forward voltage drop varies by current rating. At 2 A, the SS23L MQG specifies 500 mV, while SS2FL3-M3/H and SS2FL3HM3/H specify 540 mV. At 1 A, SS1FL3-M3/H and SS1FL3HM3/H specify 480 mV. The SL03-GS18 specifies 430 mV at 1.1 A. Lower forward voltage drop reduces power dissipation in the diode.

Q: Can the SS23L MQG be substituted with a lower current rated part to reduce power dissipation?

A: Substitution with lower current rated parts is only valid if the actual circuit current requirement does not exceed the substitute part's rating. The SS1FL3-M3/H, SS1FL3HM3/H, and SL03-GS18 offer lower forward voltage drops and reduced reverse leakage current, resulting in lower power dissipation. However, the circuit must be designed for the lower current rating.

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