SS310LHRHG Equivalent & Substitute Parts

Part Overview

The SS310LHRHG 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. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the Schottky diode rectifier category. Substitutes enable design flexibility, inventory optimization, and sourcing alternatives while maintaining circuit functionality.

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°C ~ 150°C	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution relationships for the SS310LHRHG are established based on the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Technology: Schottky
Package / Case: DO-219AB (Sub SMA compatible)
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Current - Average Rectified (Io): Equal or greater rating
Voltage - Forward (Vf) (Max): Within acceptable circuit operating margins
Speed: Fast Recovery characteristic
Operating Temperature Range: Minimum -55°C to 150°C coverage
RoHS and REACH compliance status

Parts are grouped into two categories:

Parametric Equivalent: Parts with identical electrical ratings (100 V, 3 A) and same base product lineage.

Similar Manufacturer Parts: Parts with the same voltage rating (100 V) but different current ratings (1 A or 2 A). These are suitable for applications where the circuit current requirement is lower than the main part specification, providing design flexibility and potential cost optimization.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Product Status	Grade	Qualification	Temp Range
SS310LHRHG	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	Active	Automotive	AEC-Q101	-55°C ~ 150°C
SS310L	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	Not For New Designs	—	—	-55°C ~ 150°C
SS1FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	Active	—	—	-55°C ~ 175°C
SS1FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	Active	Automotive	AEC-Q101	-55°C ~ 175°C
SS2FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	Active	—	—	-55°C ~ 175°C
SS2FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	Active	Automotive	AEC-Q101	-55°C ~ 175°C

Engineering Selection Recommendations

Direct Parametric Equivalent:

SS310L is the parametric equivalent to SS310LHRHG, matching all electrical specifications (100 V, 3 A, 850 mV forward voltage). However, SS310L carries a "Not For New Designs" product status designation. Selection of SS310L is appropriate only for legacy system maintenance, repair, or continuation of existing production runs where design changes are not feasible.

Active Status Alternatives with Reduced Current Rating:

For applications where circuit current requirements do not exceed 2 A, the Vishay eSMP® series diodes provide active product status with full AEC-Q101 automotive qualification:

SS2FH10HM3/H (2 A rating): Recommended for circuits requiring 2 A or less. Carries automotive grade and AEC-Q101 qualification matching the main part. Operating temperature range extends to 175°C, providing additional thermal margin.
SS1FH10HM3/H (1 A rating): Recommended for circuits requiring 1 A or less. Carries automotive grade and AEC-Q101 qualification. Operating temperature range extends to 175°C.

Non-automotive qualified variants (SS2FH10-M3/H and SS1FH10-M3/H) are available with identical electrical performance but without automotive grade designation and AEC-Q101 qualification.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and DO-219AB package compatibility with the main part.

Frequently Asked Questions (FAQ)

Q: Can SS310L be used as a direct replacement for SS310LHRHG?

A: SS310L is electrically and mechanically equivalent to SS310LHRHG, with identical voltage (100 V), current (3 A), and forward voltage specifications. However, SS310L is designated "Not For New Designs." Use SS310L only for repair or continuation of existing production where design modification is not permitted.

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

A: Both parts are rated 100 V, 2 A Schottky diodes in DO-219AB package with identical electrical performance. SS2FH10HM3/H carries automotive grade and AEC-Q101 qualification. SS2FH10-M3/H does not carry automotive qualification. Selection depends on application requirements for automotive compliance.

Q: Can I use a 1 A rated diode (SS1FH10HM3/H) in a circuit designed for SS310LHRHG (3 A)?

A: No. The SS1FH10HM3/H is rated for maximum 1 A average rectified current. Using it in a circuit requiring 3 A operation will exceed the component's current rating, resulting in excessive junction temperature, reduced reliability, and potential failure. Current rating must equal or exceed circuit requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SS310L, SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, SS2FH10HM3/H) are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level.

Q: What is the operating temperature difference between SS310LHRHG and Vishay eSMP® substitutes?

A: SS310LHRHG operates from -55°C to 150°C junction temperature. Vishay eSMP® series substitutes (SS1FH10 and SS2FH10 variants) operate from -55°C to 175°C, providing 25°C additional upper temperature margin.

Q: Do all substitute parts use the same DO-219AB package?

A: Yes. All listed substitute parts use DO-219AB (Sub SMA) surface mount package, ensuring mechanical and footprint compatibility with SS310LHRHG.

Q: Which substitute part should I select for automotive applications?

A: For automotive applications, select parts carrying both automotive grade designation and AEC-Q101 qualification. SS1FH10HM3/H (1 A) and SS2FH10HM3/H (2 A) meet these requirements. SS310L, while electrically equivalent at 3 A, is not recommended for new automotive designs due to "Not For New Designs" status.

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