SS23L RQG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS23L RQG is a 30V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the Sub SMA package configuration. This component is classified as a fast recovery Schottky 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 carries ROHS3 compliance certification.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified voltage and current ratings while maintaining compatible package geometry and thermal characteristics. The following substitute components provide functional equivalence for the SS23L RQG in applications requiring 30V reverse voltage and 2A average rectified current capability.

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
Package / Case	DO-219AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

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

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 30V minimum
Current - Average Rectified (Io): Equal to or greater than 2A
Package / Case: DO-219AB (Sub SMA equivalent)
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS Status: ROHS3 Compliant

Substitution Logic: Parts are grouped into two categories based on current rating alignment:

Direct Current Rating Match (2A): Parts with 2A average rectified current provide identical current handling capacity and are suitable for direct replacement in applications requiring full 2A performance.
Reduced Current Rating (1A to 1.1A): Parts with lower current ratings (1A or 1.1A) are suitable only for applications where the circuit design operates at or below these current levels. These parts maintain the 30V reverse voltage specification and fast recovery characteristics but are not suitable for circuits requiring the full 2A capability of the original part.

All substitute parts maintain the DO-219AB package geometry, surface mount configuration, and fast recovery Schottky technology required for mechanical and thermal compatibility.

Parameter Comparison

Parameter	SS23L RQG (Main)	SS2FL3HM3/H	SS2FL3-M3/H	SS1FL3-M3/H	SS1FL3HM3/H	SL03-GS18
Manufacturer	Taiwan Semiconductor	Vishay	Vishay	Vishay	Vishay	Vishay
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V	30 V	30 V
Current - Average Rectified (Io)	2 A	2 A	2 A	1 A	1 A	1.1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	540 mV @ 2 A	540 mV @ 2 A	480 mV @ 1 A	480 mV @ 1 A	430 mV @ 1.1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
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 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	125 °C (Max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	AEC-Q101	—	—	AEC-Q101	—

Engineering Selection Recommendations

For Direct Replacement (2A Current Rating Required):

The SS2FL3HM3/H and SS2FL3-M3/H are qualified as direct substitutes for the SS23L RQG. Both parts maintain the 2A average rectified current specification and are available in DO-219AB package configuration. The SS2FL3HM3/H carries AEC-Q101 automotive qualification and is supplied on Tape & Reel packaging. The SS2FL3-M3/H is supplied on Cut Tape & Digi-Reel packaging. Both parts are ROHS3 compliant and maintain the -55°C to 150°C operating temperature range. Forward voltage at 2A is 540 mV, which is 40 mV higher than the original part specification. Reverse leakage current is 200 µA at 30V, which is lower than the original specification of 400 µA.

For Current-Reduced Applications (1A to 1.1A Maximum):

The SS1FL3-M3/H, SS1FL3HM3/H, and SL03-GS18 are suitable for applications where circuit design operates at or below their respective current ratings. The SS1FL3-M3/H and SS1FL3HM3/H both provide 1A average rectified current with identical electrical characteristics. The SS1FL3HM3/H carries AEC-Q101 automotive qualification. The SL03-GS18 provides 1.1A average rectified current with the lowest forward voltage (430 mV @ 1.1A) and lowest reverse leakage current (130 µA @ 30V) among all substitutes. The SL03-GS18 maximum operating temperature is limited to 125°C, which is lower than the original part specification of 150°C.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Parts designated with AEC-Q101 qualification (SS2FL3HM3/H and SS1FL3HM3/H) are suitable for automotive applications requiring this certification level.

Frequently Asked Questions (FAQ)

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

A: The SS1FL3-M3/H is not a direct replacement. While it maintains the same 30V reverse voltage rating, fast recovery characteristics, and DO-219AB package, its 1A average rectified current rating is lower than the original part's 2A specification. This part is suitable only for applications where the circuit design operates at or below 1A.

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

A: Both parts provide identical electrical specifications with 2A average rectified current and 30V reverse voltage. The primary differences are packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and automotive qualification. The SS2FL3HM3/H carries AEC-Q101 automotive qualification, while the SS2FL3-M3/H does not.

Q: Is the SL03-GS18 suitable for high-temperature applications?

A: The SL03-GS18 has a maximum operating junction temperature of 125°C, which is lower than the original SS23L RQG specification of 150°C. This part is not suitable for applications requiring operation above 125°C.

Q: Are all substitute parts in the same package as the original?

A: Yes. All substitute parts use the DO-219AB package configuration, which is mechanically and thermally compatible with the original SS23L RQG Sub SMA package designation.

Q: What is the significance of the forward voltage difference between the original part and substitutes?

A: The SS23L RQG specifies 500 mV maximum forward voltage at 2A, while the 2A substitutes (SS2FL3HM3/H and SS2FL3-M3/H) specify 540 mV at 2A. This 40 mV difference affects power dissipation and heat generation. Applications with tight thermal budgets or high-frequency switching should account for this difference in circuit analysis.

Q: Can I use the SL03-GS18 in place of the SS23L RQG for a 2A application?

A: No. The SL03-GS18 is rated for 1.1A average rectified current. Using it in a 2A application would exceed its current rating and result in component failure or degraded performance.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates that these parts meet the Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All listed parts maintain this compliance status.

Q: Are there differences in reverse leakage current between the original and substitute parts?

A: Yes. The original SS23L RQG specifies 400 µA reverse leakage at 30V. The Vishay substitutes specify 200 µA at 30V (SS2FL3HM3/H, SS2FL3-M3/H, SS1FL3-M3/H, SS1FL3HM3/H) or 130 µA at 30V (SL03-GS18). Lower reverse leakage current is generally beneficial for circuit performance.

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