SS310LHRFG Equivalent & Substitute Parts

Part Overview

The SS310LHRFG 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. Substitute parts become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative current ratings or packaging configurations within the same electrical specification envelope.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the SS310LHRFG is determined by the following critical parameters: voltage rating (100 V DC reverse), package type (DO-219AB Sub SMA), mounting configuration (surface mount), and technology classification (Schottky fast recovery).

Parametric equivalents maintain identical electrical specifications across all key parameters. Similar parts are classified by current rating variance, which affects forward voltage characteristics and reverse leakage behavior. The SS310L represents a direct parametric equivalent with identical electrical performance but different product status. Parts with reduced current ratings (SS1FH10 series at 1 A, SS2FH10 series at 2 A) are suitable for applications where the full 3 A capability is not required, provided circuit design accommodates the lower current capacity.

All substitute candidates share the same 100 V reverse voltage rating, DO-219AB package footprint, surface mount configuration, and fast recovery Schottky technology. Packaging variants (Tape & Reel, Cut Tape, Digi-Reel) do not affect electrical substitutability but impact procurement and assembly workflows.

Parameter Comparison

Parameter	SS310LHRFG	SS310L	SS1FH10-M3/H	SS1FH10HM3/H	SS2FH10-M3/H	SS2FH10HM3/H
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	3 A	3 A	1 A	1 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A	850 mV @ 3 A	800 mV @ 1 A	800 mV @ 1 A	860 mV @ 2 A	860 mV @ 2 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	100 µA @ 100 V	100 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 10 V	5 µA @ 100 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 ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Product Status	Active	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	AEC-Q101	Not specified	Not specified	AEC-Q101	Not specified	AEC-Q101

Engineering Selection Recommendations

SS310L (Parametric Equivalent): This part maintains identical electrical specifications to the SS310LHRFG with 100 V reverse voltage, 3 A current rating, and 850 mV forward voltage. However, SS310L carries "Not For New Designs" product status, limiting its application to legacy system maintenance or existing inventory utilization. Selection of SS310L is appropriate only when design continuity with existing production units is required and long-term supply is not a consideration.

SS1FH10-M3/H and SS1FH10HM3/H (1 A Variants): These Vishay parts reduce current capacity to 1 A with corresponding forward voltage of 800 mV @ 1 A. Both maintain 100 V reverse voltage rating and DO-219AB package compatibility. SS1FH10HM3/H carries AEC-Q101 automotive qualification matching the primary part. These variants are suitable for applications where circuit design permits 1 A operation and extended temperature range (-55°C to 175°C) provides additional thermal margin.

SS2FH10-M3/H and SS2FH10HM3/H (2 A Variants): These Vishay parts provide 2 A current capacity with 860 mV forward voltage @ 2 A, representing an intermediate rating between 1 A and 3 A options. Both maintain 100 V reverse voltage and DO-219AB package. SS2FH10HM3/H carries AEC-Q101 automotive qualification. These variants are suitable for applications where 2 A capacity satisfies circuit requirements and extended temperature operation is beneficial.

All substitute candidates maintain ROHS3 compliance and identical package footprints. Selection between current rating options depends on circuit current requirements and thermal design margins. Automotive-qualified variants (SS1FH10HM3/H, SS2FH10HM3/H) are preferred for applications requiring AEC-Q101 certification.

Frequently Asked Questions (FAQ)

Q: Can SS310L be used as a direct replacement for SS310LHRFG?

A: Electrically, yes. SS310L maintains identical 100 V reverse voltage, 3 A current rating, and 850 mV forward voltage specifications. However, SS310L carries "Not For New Designs" status, restricting its use to legacy applications or existing inventory scenarios. For new designs, active-status alternatives are preferred.

Q: What is the difference between SS1FH10-M3/H and SS1FH10HM3/H?

A: Both parts share identical electrical specifications (100 V, 1 A, 800 mV forward voltage). The primary difference is packaging: SS1FH10-M3/H is supplied in Cut Tape & Digi-Reel format, while SS1FH10HM3/H is supplied in Tape & Reel. SS1FH10HM3/H additionally carries AEC-Q101 automotive qualification. Selection depends on procurement format requirements and qualification needs.

Q: Can I use a 1 A or 2 A part instead of the 3 A SS310LHRFG?

A: Substitution is possible only if circuit design accommodates the reduced current capacity. The 1 A (SS1FH10 series) and 2 A (SS2FH10 series) variants maintain the same 100 V reverse voltage and DO-219AB package footprint. However, application of a lower-rated part in a circuit requiring 3 A operation will result in component failure. Circuit analysis must confirm that maximum operating current does not exceed the substitute part's rating.

Q: Do all substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the DO-219AB package (Sub SMA), ensuring identical PCB footprint compatibility. No layout modifications are required for mechanical substitution.

Q: What is the temperature operating range difference?

A: SS310LHRFG operates from -55°C to 150°C junction temperature. Vishay substitute parts (SS1FH10 and SS2FH10 series) operate from -55°C to 175°C, providing 25°C additional upper temperature margin. This extended range may benefit thermal-constrained applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the primary part's environmental certification status.

Q: Which substitute part carries automotive qualification?

A: SS310LHRFG carries AEC-Q101 qualification. Among substitutes, SS1FH10HM3/H (1 A) and SS2FH10HM3/H (2 A) also carry AEC-Q101 qualification. SS310L, SS1FH10-M3/H, and SS2FH10-M3/H do not specify AEC-Q101 qualification in provided data.

Q: What is the reverse leakage current difference between parts?

A: SS310LHRFG specifies 100 µA @ 100 V reverse leakage. Vishay substitute parts specify 5 µA @ 100 V (or 5 µA @ 10 V for SS2FH10-M3/H), representing significantly lower leakage. Lower leakage may improve circuit performance in high-impedance applications.

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