SS310L RHG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS310L RHG is a surface mount Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 3 A average rectified current. This component is classified as Active product status and is ROHS3 compliant. The SS310L RHG is packaged in the DO-219AB (Sub SMA) form factor for surface mount applications.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design specifications permit operation with different current ratings while maintaining the same voltage class and package compatibility.

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 RHG is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain the 100 V DC reverse voltage specification. This parameter is non-negotiable for circuit protection and component reliability.

Package / Case: All substitute parts must use the DO-219AB (Sub SMA) package to ensure mechanical and electrical compatibility with existing PCB layouts and solder reflow processes.

Mounting Type: Surface mount technology is required for all substitutes to maintain assembly process compatibility.

Technology: Schottky diode technology is specified for all substitutes to preserve the fast recovery characteristics and forward voltage performance of the original design.

Current Rating: The 3 A average rectified current specification defines the primary part. Substitute parts with lower current ratings (1 A or 2 A) are classified as similar alternatives and are suitable only when circuit design permits reduced current capacity. Substitute parts with equal or higher current ratings provide direct functional equivalence.

Compliance: ROHS3 compliance and REACH unaffected status are maintained across all substitute parts.

Parameter Comparison

Parameter	SS310L RHG (Main)	SS310L (Parametric Equivalent)	SS1FH10-M3/H (Similar)	SS1FH10HM3/H (Similar)	SS2FH10-M3/H (Similar)	SS2FH10HM3/H (Similar)
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

Parametric Equivalent - SS310L (Tape & Reel)

The SS310L from Taiwan Semiconductor Corporation is a parametric equivalent to the SS310L RHG. This part maintains identical electrical specifications including 100 V reverse voltage, 3 A average rectified current, and 850 mV forward voltage at 3 A. The primary difference is packaging format (Tape & Reel versus the original specification). This part is marked as "Not For New Designs," indicating it is suitable for replacement and maintenance applications only. Inventory availability is significantly higher at 9,724 pieces.

Similar Alternatives - Vishay eSMP® Series (1 A and 2 A Ratings)

The Vishay General Semiconductor eSMP® series parts (SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, SS2FH10HM3/H) are classified as similar alternatives due to reduced current ratings. These parts are suitable for substitution only when circuit design specifications permit operation at 1 A or 2 A respectively, rather than the original 3 A specification.

SS1FH10-M3/H and SS1FH10HM3/H (1 A Rating): These parts are rated for 1 A average rectified current with 100 V reverse voltage. Operating temperature range extends to 175°C. The SS1FH10HM3/H variant includes automotive qualification (AEC-Q101). These parts are appropriate for lower-current applications within the 100 V class.

SS2FH10-M3/H and SS2FH10HM3/H (2 A Rating): These parts are rated for 2 A average rectified current with 100 V reverse voltage. Operating temperature range extends to 175°C. The SS2FH10HM3/H variant includes automotive qualification (AEC-Q101). These parts provide intermediate current capacity between the 1 A and 3 A specifications.

All Vishay alternatives maintain ROHS3 compliance, fast recovery characteristics, and DO-219AB package compatibility. Selection between these alternatives depends on actual circuit current requirements and whether automotive qualification is necessary.

Frequently Asked Questions (FAQ)

Q: Can the SS310L (Tape & Reel) directly replace the SS310L RHG?

A: Yes. The SS310L in Tape & Reel packaging is a parametric equivalent with identical electrical specifications (100 V, 3 A, 850 mV forward voltage). The only difference is packaging format. Both parts are suitable for surface mount assembly. The primary consideration is that the SS310L is marked "Not For New Designs," making it appropriate for replacement and maintenance applications.

Q: What is the difference between the Vishay 1 A and 2 A alternatives?

A: The SS1FH10 series is rated for 1 A average rectified current, while the SS2FH10 series is rated for 2 A. Both maintain the 100 V reverse voltage specification and DO-219AB package. Selection depends on circuit current requirements. The 2 A rating provides greater current capacity than the 1 A rating but less than the original 3 A specification.

Q: Are the Vishay eSMP® parts compatible with the original PCB layout?

A: Yes. All substitute parts use the DO-219AB (Sub SMA) package, which is mechanically and electrically compatible with the original SS310L RHG. Surface mount assembly processes remain unchanged.

Q: What is the significance of the AEC-Q101 qualification on certain Vishay parts?

A: AEC-Q101 is an automotive qualification standard. The SS1FH10HM3/H and SS2FH10HM3/H variants include this qualification, making them suitable for automotive applications. Parts without this designation are suitable for general industrial and commercial applications.

Q: Can I use a 1 A or 2 A rated diode in place of the 3 A rated SS310L RHG?

A: Only if circuit design specifications permit operation at the lower current rating. The 1 A and 2 A alternatives are suitable substitutes only when the actual circuit current demand does not exceed their respective ratings. Using an undersized component for a higher-current application results in component failure and circuit malfunction.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Cut Tape & Digi-Reel® provides flexibility for lower-volume applications, while Tape & Reel is optimized for high-volume production. Electrical performance is identical; the difference is in supply format and handling.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original SS310L RHG specification.

Q: What is the operating temperature difference between the original part and Vishay alternatives?

A: The SS310L RHG operates from -55°C to 150°C junction temperature. The Vishay eSMP® alternatives operate from -55°C to 175°C, providing a 25°C higher maximum operating temperature. This extended range is beneficial for high-temperature applications but does not affect substitution compatibility in standard operating conditions.

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