SS23L MHG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS23L MHG is a 30V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in Sub SMA surface mount packaging. This component is classified as a fast recovery diode with a maximum forward voltage of 500 mV at 2A and operates across a junction temperature range of -55°C to 150°C. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical specifications including reverse voltage rating, current capacity, recovery speed characteristics, and compatible surface mount packaging. Substitute parts enable design flexibility, support supply chain continuity, and accommodate application-specific requirements such as automotive qualification or alternative packaging formats.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 30 V
Mounting Type	Surface Mount	—
Package / Case	DO-219AB	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SS23L MHG are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 30V (exact match required)
Technology: Schottky (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: DO-219AB (exact match required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Current Capacity Grouping: Substitute parts are organized by average rectified current (Io) rating. The SS23L MHG operates at 2A. Substitutes include parts rated at 1A, 1.1A, and 2A. Lower current-rated parts (1A, 1.1A) are suitable for applications where the circuit design does not require the full 2A capacity. Parts rated at 2A provide direct functional equivalence.

Packaging Format Variations: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats, accommodating different procurement and assembly workflows while maintaining identical electrical performance and mechanical compatibility.

Automotive Qualification: Select substitute parts carry AEC-Q101 automotive qualification and Automotive grade designation, enabling use in automotive applications where such certification is mandated.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Temp Range	Automotive Grade
SS23L MHG	Taiwan Semiconductor Corporation	30V	2A	500 mV @ 2A	400 µA @ 30V	DO-219AB	-55 to 150°C	—
SS2FL3HM3/H	Vishay General Semiconductor	30V	2A	540 mV @ 2A	200 µA @ 30V	DO-219AB	-55 to 150°C	AEC-Q101
SS2FL3-M3/H	Vishay General Semiconductor	30V	2A	540 mV @ 2A	200 µA @ 30V	DO-219AB	-55 to 150°C	—
SS1FL3HM3/H	Vishay General Semiconductor	30V	1A	480 mV @ 1A	200 µA @ 30V	DO-219AB	-55 to 150°C	AEC-Q101
SS1FL3-M3/H	Vishay General Semiconductor	30V	1A	480 mV @ 1A	200 µA @ 30V	DO-219AB	-55 to 150°C	—
SL03-GS18	Vishay General Semiconductor	30V	1.1A	430 mV @ 1.1A	130 µA @ 30V	DO-219AB	—	—

Engineering Selection Recommendations

Direct Functional Equivalents (2A Current Rating):

The SS2FL3HM3/H and SS2FL3-M3/H are direct functional equivalents to the SS23L MHG, both rated at 2A average rectified current with identical 30V reverse voltage and DO-219AB packaging. Both parts are RoHS3 compliant and maintain the -55°C to 150°C operating temperature range. The SS2FL3HM3/H carries AEC-Q101 automotive qualification and Automotive grade designation, making it suitable for automotive applications requiring such certification. The SS2FL3-M3/H is available in Tape & Reel packaging format.

Reduced Current Capacity Substitutes (1A Rating):

The SS1FL3HM3/H and SS1FL3-M3/H are rated at 1A average rectified current and are suitable for applications where circuit design does not require the full 2A capacity of the SS23L MHG. Both maintain 30V reverse voltage, DO-219AB packaging, and -55°C to 150°C operating temperature range. The SS1FL3HM3/H carries AEC-Q101 automotive qualification. These parts exhibit lower forward voltage (480 mV @ 1A) compared to the main part.

Intermediate Current Capacity Substitute (1.1A Rating):

The SL03-GS18 is rated at 1.1A average rectified current and represents an intermediate current capacity option. This part maintains 30V reverse voltage and DO-219AB packaging. It exhibits the lowest forward voltage among all listed substitutes (430 mV @ 1.1A) and the lowest reverse leakage current (130 µA @ 30V). Operating temperature range information is not provided for this part.

Compliance and Certification:

All listed substitute parts maintain RoHS3 compliance and REACH Unaffected status, matching the regulatory posture of the SS23L MHG. Parts designated with Automotive grade and AEC-Q101 qualification are restricted to applications requiring automotive-level component certification.

Frequently Asked Questions (FAQ)

Q: Can the SS1FL3HM3/H or SS1FL3-M3/H be used as a direct replacement for the SS23L MHG?

A: The SS1FL3HM3/H and SS1FL3-M3/H are electrically compatible substitutes with identical reverse voltage (30V) and package (DO-219AB). However, these parts are rated at 1A average rectified current, compared to the 2A rating of the SS23L MHG. Substitution is valid only if the circuit design does not require current capacity exceeding 1A. Forward voltage characteristics differ slightly (480 mV @ 1A versus 500 mV @ 2A).

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

A: Both parts are rated at 2A average rectified current with identical electrical specifications (30V reverse voltage, 540 mV forward voltage @ 2A, DO-219AB package, -55°C to 150°C operating range). The primary difference is packaging format: SS2FL3HM3/H is supplied in Tape & Reel (TR) format, while SS2FL3-M3/H is supplied in Tape & Reel (TR) format. The SS2FL3HM3/H carries AEC-Q101 automotive qualification; the SS2FL3-M3/H does not.

Q: Is the SL03-GS18 a suitable substitute for the SS23L MHG?

A: The SL03-GS18 is electrically compatible with respect to reverse voltage (30V), technology (Schottky), and package (DO-219AB). However, it is rated at 1.1A average rectified current, below the 2A rating of the SS23L MHG. Substitution is appropriate only for applications where current requirements do not exceed 1.1A. The SL03-GS18 exhibits superior forward voltage (430 mV @ 1.1A) and reverse leakage characteristics (130 µA @ 30V).

Q: Can I use an automotive-qualified part (AEC-Q101) in a non-automotive application?

A: Yes. Automotive-qualified parts such as SS2FL3HM3/H and SS1FL3HM3/H meet or exceed the electrical and reliability specifications required for non-automotive applications. Automotive qualification represents an additional certification level and does not restrict use in other applications.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. Tape & Reel packaging is standard for high-volume automated assembly. Cut Tape & Digi-Reel® format accommodates lower-volume or mixed-component procurement workflows. All packaging formats maintain identical electrical performance and mechanical compatibility with the DO-219AB package specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SS2FL3HM3/H, SS2FL3-M3/H, SS1FL3HM3/H, SS1FL3-M3/H, and SL03-GS18) are RoHS3 compliant and REACH Unaffected, matching the regulatory compliance of the SS23L MHG.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage differences between parts are specified at their respective rated currents. The SS23L MHG exhibits 500 mV @ 2A, while substitute parts rated at lower currents (SS1FL3 series at 480 mV @ 1A, SL03-GS18 at 430 mV @ 1.1A) show different forward voltage characteristics. These differences are inherent to the current rating and do not indicate incompatibility. Circuit design must account for the forward voltage of the selected part at its operating current.

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

A: Reverse leakage current is specified at maximum reverse voltage (30V). The SS23L MHG exhibits 400 µA @ 30V, while most Vishay substitutes exhibit 200 µA @ 30V, and the SL03-GS18 exhibits 130 µA @ 30V. Lower reverse leakage indicates reduced parasitic current flow in reverse bias conditions. Differences in this parameter do not affect functional compatibility but may influence circuit performance in applications sensitive to leakage current.

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