SS310LHRTG Equivalent & Substitute Parts

Part Overview

The SS310LHRTG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 3 A average rectified current in a Sub SMA surface mount package. This component is classified as Active product status and carries AEC-Q101 automotive qualification.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications permit operation with components having different current ratings or forward voltage characteristics within acceptable system parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 100 V
Technology	Schottky
Package / Case	DO-219AB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS310LHRTG is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 100 V or greater to ensure equivalent reverse bias protection.

Package and Mounting: All substitute parts must use the DO-219AB package with surface mount technology to maintain PCB assembly compatibility.

Technology Type: All substitute parts must employ Schottky diode technology to preserve fast recovery characteristics and forward voltage behavior.

Current Rating: Substitute parts may have current ratings of 1 A, 2 A, or 3 A. Parts with lower current ratings (1 A or 2 A) are suitable for applications where the circuit design permits reduced current capacity. Parts with 3 A rating provide direct functional equivalence.

Compliance and Qualification: Substitute parts carrying AEC-Q101 automotive qualification are suitable for automotive applications. Parts without automotive qualification may be used in non-automotive applications where the same electrical parameters are met.

Product Status: Active status parts are preferred for new designs. Parts with "Not For New Designs" status are suitable for legacy system support and replacement applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Product Status	Grade	Qualification	Temp Range
SS310LHRTG	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	Active	Automotive	AEC-Q101	-55 to 150°C
SS310L	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	Not For New Designs	Not Specified	Not Specified	-55 to 150°C
SS1FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	Active	Not Specified	Not Specified	-55 to 175°C
SS1FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	Active	Automotive	AEC-Q101	-55 to 175°C
SS2FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	Active	Not Specified	Not Specified	-55 to 175°C
SS2FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	Active	Automotive	AEC-Q101	-55 to 175°C

Engineering Selection Recommendations

Direct Parametric Equivalent (3 A Rating)

SS310L is a parametric equivalent with identical voltage, current, and forward voltage specifications. This part is suitable for replacement applications and legacy system support. The "Not For New Designs" status indicates this part is retained for existing product lines. Use SS310L when exact current capacity matching is required and the application does not mandate Active product status.

Automotive-Qualified Alternatives (Reduced Current Ratings)

SS1FH10HM3/H and SS2FH10HM3/H are Vishay alternatives carrying AEC-Q101 automotive qualification. These parts maintain 100 V reverse voltage rating and DO-219AB packaging. SS1FH10HM3/H provides 1 A capacity; SS2FH10HM3/H provides 2 A capacity. Both are Active status parts suitable for new automotive designs. Selection between these parts depends on circuit current requirements. If the application circuit operates at or below 2 A, SS2FH10HM3/H is preferred for margin. If the application operates at or below 1 A, SS1FH10HM3/H is suitable.

Non-Automotive Alternatives (Reduced Current Ratings)

SS1FH10-M3/H and SS2FH10-M3/H are Vishay alternatives without automotive qualification. These parts are suitable for non-automotive applications where AEC-Q101 certification is not required. SS1FH10-M3/H provides 1 A capacity; SS2FH10-M3/H provides 2 A capacity. Both are Active status parts with extended operating temperature range (-55 to 175°C).

Selection Criteria Summary

For automotive applications requiring 3 A capacity: Use SS310LHRTG (primary) or SS310L (legacy support).

For automotive applications with 2 A or lower capacity requirement: Use SS2FH10HM3/H.

For automotive applications with 1 A or lower capacity requirement: Use SS1FH10HM3/H.

For non-automotive applications with 2 A or lower capacity requirement: Use SS2FH10-M3/H.

For non-automotive applications with 1 A or lower capacity requirement: Use SS1FH10-M3/H.

Frequently Asked Questions (FAQ)

Q: Can SS310L be used as a direct replacement for SS310LHRTG?

A: Yes. SS310L provides identical electrical specifications: 100 V reverse voltage, 3 A average rectified current, 850 mV forward voltage at 3 A, and DO-219AB packaging. The primary difference is product status classification. SS310L is designated "Not For New Designs," making it suitable for replacement and legacy applications but not recommended for new product development.

Q: What is the difference between SS2FH10-M3/H and SS2FH10HM3/H?

A: Both parts provide identical electrical specifications: 100 V reverse voltage, 2 A average rectified current, 860 mV forward voltage at 2 A, and DO-219AB packaging. The key difference is automotive qualification. SS2FH10HM3/H carries AEC-Q101 automotive qualification and is suitable for automotive applications. SS2FH10-M3/H lacks automotive qualification and is suitable for non-automotive applications. Both are Active status parts.

Q: Can a 1 A rated diode substitute for a 3 A rated diode?

A: A 1 A rated diode cannot substitute for a 3 A rated diode in applications requiring 3 A current capacity. However, if the circuit design operates at 1 A or below, a 1 A rated diode is suitable. The substitute part must not be operated above its rated current capacity. Circuit analysis is required to determine actual operating current.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the DO-219AB package with surface mount technology. This ensures PCB assembly compatibility without requiring layout modifications.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive qualification standard. Parts carrying this qualification have undergone testing and validation for automotive applications. For automotive designs, AEC-Q101 qualified parts are required. For non-automotive applications, this qualification is not necessary.

Q: Can I use a part with a lower reverse voltage rating?

A: No. All substitute parts must maintain the 100 V reverse voltage rating or higher. Using a part with lower reverse voltage rating creates risk of diode failure under reverse bias conditions.

Q: What is the difference between the operating temperature ranges?

A: SS310LHRTG operates from -55°C to 150°C junction temperature. Vishay alternatives (SS1FH10 and SS2FH10 series) operate from -55°C to 175°C. The extended upper temperature limit in Vishay parts provides additional thermal margin but does not affect substitution suitability if the application operates within the -55°C to 150°C range.

Q: Are there packaging format differences among the substitute parts?

A: Yes. SS310LHRTG is supplied in standard packaging format. SS310L is supplied in Tape & Reel (TR) format. Vishay parts are supplied in various formats including Cut Tape (CT), Digi-Reel®, and Tape & Reel (TR). Packaging format affects procurement and assembly processes but does not affect electrical performance. Confirm packaging format compatibility with manufacturing processes before selection.

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