SS310LHRUG Equivalent & Substitute Parts

Part Overview

The SS310LHRUG 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 automotive-grade qualification (AEC-Q101). Alternative equivalent and substitute parts are necessary to address supply chain flexibility, packaging preferences, current rating requirements, and design optimization across different application scenarios while maintaining electrical and mechanical compatibility within the DO-219AB package family.

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
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the SS310LHRUG is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 100 V
Technology: Must be Schottky
Package / Case: Must be DO-219AB
Mounting Type: Must be Surface Mount
RoHS Status: Must be ROHS3 Compliant

Secondary Substitution Criteria:

Current - Average Rectified (Io): Determines current capacity compatibility
Voltage - Forward (Vf) (Max) @ If: Affects power dissipation and thermal performance
Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: Must support -55°C to 150°C minimum range
Grade and Qualification: Automotive grade and AEC-Q101 qualification preferred for equivalent substitution

Substitute parts are grouped into two categories:

Parametric Equivalent (Full Electrical Match): SS310L matches all electrical parameters of the main part (100 V, 3 A, 850 mV @ 3 A) with identical reverse leakage characteristics. Packaging differs (Tape & Reel vs. unspecified), and product status is Not For New Designs.

Similar Parts (Reduced Current Rating): SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, and SS2FH10HM3/H are Vishay eSMP® series Schottky diodes with 100 V rating and DO-219AB package. These parts feature reduced current ratings (1 A or 2 A) compared to the 3 A main part, lower reverse leakage (5 µA), and extended junction temperature range (-55°C to 175°C). All are Active product status with AEC-Q101 qualification.

Parameter Comparison

Parameter	SS310LHRUG (Main)	SS310L	SS1FH10-M3/H	SS1FH10HM3/H	SS2FH10-M3/H	SS2FH10HM3/H
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Vishay	Vishay	Vishay	Vishay
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 to 150°C	-55 to 150°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Product Status	Active	Not For New Designs	Active	Active	Active	Active
Grade	Automotive	—	—	Automotive	—	Automotive
Qualification	AEC-Q101	—	—	AEC-Q101	—	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SS310L (Parametric Equivalent): SS310L provides full electrical equivalence to SS310LHRUG with identical 100 V, 3 A, and 850 mV forward voltage specifications. This part is suitable for direct substitution in applications requiring the full 3 A current capacity. However, SS310L carries Not For New Designs product status, limiting its use to legacy system support or existing inventory management. Selection of SS310L is appropriate only when supply of the primary part is unavailable and existing designs are locked to this specification.

SS1FH10HM3/H (1 A Automotive Equivalent): SS1FH10HM3/H is an Active product from Vishay with automotive grade and AEC-Q101 qualification matching the main part. This 1 A rated diode is suitable for applications where current requirements do not exceed 1 A. The part offers improved reverse leakage (5 µA vs. 100 µA), extended junction temperature range (-55°C to 175°C), and active product status. Selection is appropriate for new designs with 1 A or lower current requirements.

SS2FH10HM3/H (2 A Automotive Equivalent): SS2FH10HM3/H is an Active product from Vishay with automotive grade and AEC-Q101 qualification. This 2 A rated diode bridges the current gap between 1 A and 3 A options. The part offers improved reverse leakage (5 µA), extended junction temperature range, and active product status. Selection is appropriate for applications requiring 2 A or lower current capacity in new automotive designs.

SS1FH10-M3/H and SS2FH10-M3/H (Non-Automotive Alternatives): These Vishay eSMP® series parts are Active products without automotive grade or AEC-Q101 qualification. SS1FH10-M3/H (1 A) and SS2FH10-M3/H (2 A) are suitable for non-automotive applications where current requirements are 1 A or 2 A respectively. Both offer improved reverse leakage and extended temperature range compared to the main part.

Frequently Asked Questions (FAQ)

Q: Can SS310L be used as a direct replacement for SS310LHRUG?

A: Yes, SS310L provides full electrical equivalence with identical 100 V reverse voltage, 3 A current rating, and 850 mV forward voltage specifications. Both parts use the DO-219AB package and are ROHS3 compliant. However, SS310L carries Not For New Designs status, making it suitable only for legacy applications or inventory management rather than new product development.

Q: What is the difference between the Taiwan Semiconductor and Vishay substitute parts?

A: The Taiwan Semiconductor SS310L matches the main part's electrical specifications exactly (100 V, 3 A, 850 mV). The Vishay eSMP® series parts (SS1FH10 and SS2FH10 families) offer reduced current ratings (1 A or 2 A) but provide improved reverse leakage characteristics (5 µA vs. 100 µA), extended junction temperature range (-55°C to 175°C vs. -55°C to 150°C), and active product status. Vishay parts with automotive grade and AEC-Q101 qualification (SS1FH10HM3/H and SS2FH10HM3/H) are preferred for new automotive designs.

Q: Can I use a 1 A or 2 A rated diode in place of the 3 A SS310LHRUG?

A: Substitution with lower current-rated parts is permissible only if the application circuit requires 1 A or 2 A or less. The 100 V reverse voltage rating, DO-219AB package, and Schottky technology remain compatible. However, if the circuit design requires the full 3 A capacity, lower-rated substitutes will not function correctly and may fail under load. Circuit analysis must confirm that peak and average current demands do not exceed the substitute part's rating.

Q: Are all substitute parts automotive qualified?

A: No. Only SS1FH10HM3/H and SS2FH10HM3/H carry automotive grade and AEC-Q101 qualification matching the main part. SS310L does not specify automotive grade or qualification. SS1FH10-M3/H and SS2FH10-M3/H are non-automotive variants. For automotive applications, selection must be limited to parts with explicit automotive grade and AEC-Q101 qualification.

Q: What is the packaging difference between substitute parts?

A: All substitute parts use the DO-219AB package and surface mount mounting type, ensuring mechanical compatibility. Packaging format differs: SS310LHRUG packaging is unspecified, SS310L is supplied in Tape & Reel (TR), SS1FH10-M3/H and SS2FH10-M3/H are supplied in Cut Tape (CT) & Digi-Reel®, and SS1FH10HM3/H and SS2FH10HM3/H are supplied in Tape & Reel (TR). These format differences affect handling and assembly but do not impact electrical or mechanical compatibility.

Q: Why do Vishay parts have lower reverse leakage current?

A: Reverse leakage current is a specified parameter that differs between manufacturers and product lines. Vishay eSMP® series parts specify 5 µA reverse leakage compared to 100 µA for the Taiwan Semiconductor parts. Lower reverse leakage indicates reduced standby current consumption and improved efficiency in certain circuit topologies. This is a manufacturing characteristic and does not indicate superiority; it reflects different design and process specifications.

Q: What is the operating temperature difference between parts?

A: SS310LHRUG and SS310L specify -55°C to 150°C junction temperature range. All Vishay eSMP® series substitutes (SS1FH10 and SS2FH10 families) specify -55°C to 175°C. The extended upper temperature limit of Vishay parts provides additional thermal margin in high-temperature applications. Selection should confirm that the application's maximum junction temperature requirement does not exceed the chosen part's rating.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, if circuit topology permits. Multiple diodes in parallel or series configurations may use different substitute parts provided that electrical parameters (100 V reverse voltage, Schottky technology, fast recovery speed) remain consistent. However, mixing parts with significantly different reverse leakage currents (100 µA vs. 5 µA) in parallel configurations may result in unequal current distribution. Circuit analysis is required to confirm compatibility in multi-diode configurations.

Q: Is RoHS3 compliance maintained across all substitutes?

A: Yes. All listed substitute parts (SS310L, SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, SS2FH10HM3/H) are ROHS3 compliant, matching the main part SS310LHRUG. This ensures environmental and regulatory compliance across all substitution options.

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