SS310L RQG Equivalent & Substitute Parts

Part Overview

The SS310L RQG 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 is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and thermal operating ranges. Alternative components may be required due to inventory availability, supply chain considerations, or design optimization for specific application requirements.

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

Substitute Part Grouping Explanation

Substitution of the SS310L RQG is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 850 mV at rated current
Speed: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: Must not exceed 100 µA @ 100 V

Mechanical Compatibility Requirements:

Package / Case: DO-219AB (Sub SMA)
Mounting Type: Surface Mount
Operating Temperature - Junction: Must support -55°C ~ 150°C minimum range

Compliance Requirements:

Technology: Schottky diode
RoHS Status: ROHS3 Compliant

Substitute parts are grouped based on whether they meet all electrical parameters at or above the main part specifications while maintaining package and thermal compatibility. Parts with lower current ratings (1 A or 2 A) are classified as similar alternatives suitable for applications with reduced current requirements but identical voltage and package specifications.

Parameter Comparison

Parameter	SS310L RQG (Main)	SS310L (Parametric Equivalent)	SS1FH10-M3/H	SS1FH10HM3/H	SS2FH10-M3/H	SS2FH10HM3/H
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	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 (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
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
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

Engineering Selection Recommendations

Direct Equivalent (Full Substitution):

The SS310L (Parametric Equivalent) from Taiwan Semiconductor Corporation matches all electrical and mechanical specifications of the SS310L RQG. However, this part carries a "Not For New Designs" product status designation. Selection of this part is appropriate only for legacy system maintenance, repair, or continuation of existing production runs where design changes are not feasible.

Current-Rated Alternatives (Partial Substitution):

The SS1FH10-M3/H and SS1FH10HM3/H (1 A rated) and SS2FH10-M3/H and SS2FH10HM3/H (2 A rated) from Vishay General Semiconductor are classified as similar alternatives. These parts maintain identical voltage ratings (100 V), package specifications (DO-219AB), and fast recovery characteristics. Selection of these alternatives is appropriate only for applications where the circuit current requirement does not exceed the rated current of the substitute part (1 A or 2 A respectively).

The Vishay alternatives provide extended operating temperature ranges (-55°C ~ 175°C versus -55°C ~ 150°C) and lower reverse leakage current (5 µA versus 100 µA), representing improved performance characteristics. The SS1FH10HM3/H and SS2FH10HM3/H carry automotive-grade qualification (AEC-Q101), suitable for automotive and high-reliability applications.

All substitute parts maintain ROHS3 compliance and are classified as Active product status, supporting long-term design continuity.

Frequently Asked Questions (FAQ)

Q: Can the SS310L (Parametric Equivalent) be used as a direct replacement for the SS310L RQG?

A: The SS310L (Parametric Equivalent) matches all electrical and mechanical specifications. However, it carries a "Not For New Designs" product status. Direct substitution is permissible for maintenance and repair applications only. For new designs, selection of an Active-status alternative is recommended.

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

A: Both parts are electrically identical 1 A Schottky diodes with 100 V ratings and DO-219AB packages. The primary difference is packaging format: SS1FH10-M3/H is supplied in Cut Tape (CT) & Digi-Reel format, while SS1FH10HM3/H is supplied in Tape & Reel (TR) format. The SS1FH10HM3/H additionally carries automotive-grade qualification (AEC-Q101).

Q: Can I use a 2 A rated diode (SS2FH10-M3/H or SS2FH10HM3/H) in place of the 3 A rated SS310L RQG?

A: No. The SS2FH10 series is rated for maximum 2 A average rectified current. Use in a circuit requiring 3 A operation would exceed the component rating and result in thermal stress and potential failure. Selection of a 2 A alternative is appropriate only for circuits with maximum current requirements not exceeding 2 A.

Q: Can I use a 1 A rated diode (SS1FH10-M3/H or SS1FH10HM3/H) in place of the 3 A rated SS310L RQG?

A: No. The SS1FH10 series is rated for maximum 1 A average rectified current. Use in a circuit requiring 3 A operation would exceed the component rating. Selection of a 1 A alternative is appropriate only for circuits with maximum current requirements not exceeding 1 A.

Q: Are all substitute parts compatible with the same PCB footprint as the SS310L RQG?

A: Yes. All listed substitute parts use the DO-219AB (Sub SMA) package specification and surface mount mounting type, ensuring mechanical and footprint compatibility with the SS310L RQG.

Q: What is the significance of the extended operating temperature range in the Vishay alternatives?

A: The Vishay alternatives support -55°C ~ 175°C junction temperature range, compared to -55°C ~ 150°C for the SS310L RQG. This extended upper temperature limit provides additional thermal margin in high-temperature applications and represents improved thermal performance.

Q: Why do the Vishay alternatives have lower reverse leakage current specifications?

A: The Vishay alternatives specify 5 µA reverse leakage current at rated voltage, compared to 100 µA for the SS310L RQG. Lower reverse leakage current represents improved device quality and reduced power dissipation in reverse bias conditions, beneficial for precision analog and low-power applications.

Q: What does AEC-Q101 qualification indicate?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts carrying this qualification (SS1FH10HM3/H and SS2FH10HM3/H) have undergone enhanced reliability testing and are suitable for automotive and high-reliability applications requiring stringent quality assurance.

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