SS310L RUG Equivalent & Substitute Parts

Part Overview

The SS310L RUG 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 (DO-219AB). This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary part becomes unavailable, when design requirements shift toward alternative manufacturers, or when specific performance characteristics or certifications (such as automotive qualification) are required for particular applications.

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
Package / Case	DO-219AB	Sub SMA
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

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

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 100 V or higher to ensure safe operation within the same circuit topology.

Current Rating: The average rectified current (Io) is the primary differentiator among substitute parts. The SS310L RUG is rated for 3 A. Substitute parts with lower current ratings (1 A or 2 A) are suitable only when circuit design permits reduced current capacity. Parts with equal or higher current ratings provide direct substitution capability.

Package and Mounting: All substitute parts use the DO-219AB (Sub SMA) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Speed Characteristics: All substitute parts maintain fast recovery characteristics (≤ 500ns, > 200mA), preserving switching performance in rectification applications.

Temperature Range: Operating temperature ranges vary among substitutes. The SS310L RUG operates from -55°C to 150°C. Substitute parts with extended temperature ranges (-55°C to 175°C) provide broader operational capability.

Compliance and Certifications: RoHS3 compliance is maintained across all substitute parts. Automotive-grade substitutes (SS1FH10HM3/H and SS2FH10HM3/H) include AEC-Q101 qualification, suitable for automotive applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf @ If	Reverse Leakage @ Vr	Temp Range (°C)	Package	Product Status	Automotive Grade
SS310L RUG	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	100 µA @ 100 V	-55 to 150	DO-219AB	Active	No
SS310L	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	100 µA @ 100 V	-55 to 150	DO-219AB	Not For New Designs	No
SS1FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	5 µA @ 100 V	-55 to 175	DO-219AB	Active	No
SS1FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	5 µA @ 100 V	-55 to 175	DO-219AB	Active	Yes (AEC-Q101)
SS2FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	5 µA @ 10 V	-55 to 175	DO-219AB	Active	No
SS2FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	5 µA @ 100 V	-55 to 175	DO-219AB	Active	Yes (AEC-Q101)

Engineering Selection Recommendations

Direct Equivalent (Same Current Rating):

The SS310L (without RUG suffix) from Taiwan Semiconductor Corporation is electrically and mechanically identical to the SS310L RUG. However, this part is classified as "Not For New Designs," indicating end-of-life status. Use only when existing inventory is available and no alternative is feasible.

Vishay eSMP® Series Substitutes:

The Vishay General Semiconductor - Diodes Division eSMP® series parts (SS1FH10, SS2FH10 families) are active products with extended operating temperature ranges (-55°C to 175°C versus -55°C to 150°C). All Vishay substitutes maintain ROHS3 compliance and DO-219AB packaging.

For Applications Requiring Full 3 A Capacity:

No direct 3 A substitute is available in the provided part list. The SS310L RUG remains the only 3 A option. If the SS310L RUG becomes unavailable, circuit redesign to operate at 2 A or lower current levels is required, enabling use of SS2FH10-M3/H or SS2FH10HM3/H.

For Automotive Applications:

SS1FH10HM3/H (1 A) and SS2FH10HM3/H (2 A) include AEC-Q101 automotive qualification. These parts are suitable for automotive-grade designs requiring formal qualification documentation.

For Extended Temperature Operation:

All Vishay substitutes support -55°C to 175°C operating range, providing 25°C additional high-temperature capability compared to the SS310L RUG (-55°C to 150°C).

Compliance Considerations:

All parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 1 - Unlimited) is consistent across all options, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can SS1FH10-M3/H or SS1FH10HM3/H replace SS310L RUG in a 3 A circuit?

A: No. SS1FH10 series parts are rated for 1 A average rectified current, while SS310L RUG is rated for 3 A. Using a 1 A part in a 3 A application will result in device failure due to thermal and current stress exceeding rated specifications.

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

A: Both parts are rated for 100 V and 2 A with identical electrical characteristics. The primary difference is packaging: SS2FH10-M3/H is supplied in Cut Tape (CT) & Digi-Reel®, while SS2FH10HM3/H is supplied in Tape & Reel (TR). Additionally, SS2FH10HM3/H includes automotive-grade qualification (AEC-Q101). Select based on packaging requirements and automotive certification needs.

Q: Is the SS310L (without RUG) suitable for new designs?

A: No. The SS310L is marked "Not For New Designs," indicating obsolescence. Use only when existing inventory is available and no active alternative meets requirements. For new designs, select from active product status parts.

Q: Can I use a Vishay substitute if my original design specifies Taiwan Semiconductor Corporation?

A: Yes, provided electrical and mechanical parameters match. All Vishay eSMP® series substitutes maintain identical voltage ratings, package types (DO-219AB), and mounting methods (surface mount). Verify current rating compatibility with circuit requirements before substitution.

Q: What is the impact of lower reverse leakage current in Vishay parts?

A: Vishay substitutes exhibit 5 µA reverse leakage at rated voltage, compared to 100 µA in the SS310L RUG. Lower reverse leakage reduces standby power dissipation and heat generation, providing improved efficiency in low-current or standby operating modes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—SS310L, SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, and SS2FH10HM3/H—are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

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

A: Vishay eSMP® series parts operate to 175°C junction temperature, compared to 150°C for the SS310L RUG. This 25°C margin provides additional thermal headroom in high-temperature environments, reducing thermal stress and extending component life in demanding applications.

Q: Can I substitute a 2 A part for a 3 A requirement?

A: No. A 2 A part (SS2FH10-M3/H or SS2FH10HM3/H) cannot safely replace a 3 A requirement. Circuit redesign to reduce current demand to 2 A or lower is necessary before substitution.

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