SS310L RFG Equivalent & Substitute Parts

Part Overview

The SS310L RFG 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 become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative electrical or mechanical specifications. The SS310L RFG maintains parametric equivalence with several alternative part numbers across different manufacturers and packaging configurations.

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

Substitute Part Grouping Explanation

Substitution of the SS310L RFG is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

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

Current Rating Considerations: Substitute parts are grouped into three categories based on average rectified current (Io):

3 A Rating (Full Equivalents): Parts with Io = 3 A provide direct functional replacement
2 A Rating (Reduced Current): Parts with Io = 2 A operate within the same voltage class but with lower current capacity
1 A Rating (Reduced Current): Parts with Io = 1 A operate within the same voltage class but with significantly lower current capacity

Forward Voltage Characteristics: Forward voltage specifications vary slightly across manufacturers but remain within acceptable operating ranges for 100 V Schottky rectifiers.

Temperature Range Considerations: The main part operates from -55°C to 150°C. Substitute parts from Vishay General Semiconductor extend to -55°C to 175°C, providing enhanced high-temperature performance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Temp Range (°C)	Product Status	RoHS
SS310L RFG	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	-55 to 150	Active	ROHS3
SS310L	Taiwan Semiconductor Corporation	100 V	3	850 mV @ 3 A	DO-219AB	-55 to 150	Not For New Designs	ROHS3
SS1FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	-55 to 175	Active	ROHS3
SS1FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	1	800 mV @ 1 A	DO-219AB	-55 to 175	Active	ROHS3
SS2FH10-M3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	-55 to 175	Active	ROHS3
SS2FH10HM3/H	Vishay General Semiconductor - Diodes Division	100 V	2	860 mV @ 2 A	DO-219AB	-55 to 175	Active	ROHS3

Engineering Selection Recommendations

Parametric Equivalent (Full Replacement): The SS310L (Tape & Reel packaging) from Taiwan Semiconductor Corporation is a parametric equivalent with identical electrical specifications. However, this part carries "Not For New Designs" status, limiting its application to legacy system maintenance or existing inventory utilization only.

Active Status Alternatives with Reduced Current Rating: Vishay General Semiconductor eSMP® series parts (SS1FH10-M3/H, SS1FH10HM3/H, SS2FH10-M3/H, SS2FH10HM3/H) maintain Active product status and ROHS3 compliance. These parts operate within the same 100 V voltage class and DO-219AB package specification.

Current Rating Derating:

SS2FH10 series (2 A rating) provides 67% of the original 3 A capacity
SS1FH10 series (1 A rating) provides 33% of the original 3 A capacity

Selection of reduced-current alternatives requires circuit-level analysis to confirm that application current demands do not exceed the substitute part's Io specification.

Temperature Performance: Vishay parts extend the upper junction temperature limit to 175°C compared to the original 150°C specification, providing thermal margin for high-temperature applications.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity level, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SS1FH10-M3/H or SS1FH10HM3/H directly replace SS310L RFG in all applications?

A: Direct replacement is limited to applications where circuit current demand does not exceed 1 A. The SS1FH10 series provides one-third the current capacity of the SS310L RFG. Circuit redesign or parallel configuration may be required for higher current applications.

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

A: Both parts are electrically identical with 100 V, 2 A specifications and DO-219AB packaging. SS2FH10-M3/H is supplied in Cut Tape (CT) & Digi-Reel® packaging, while SS2FH10HM3/H is supplied in Tape & Reel (TR) format. The SS2FH10HM3/H variant includes AEC-Q101 automotive qualification.

Q: Why is SS310L marked "Not For New Designs"?

A: This status indicates the part is in mature or declining production phase. While functionally equivalent to SS310L RFG, it is reserved for legacy system support and existing inventory applications. New designs should utilize Active status alternatives.

Q: Are all substitute parts compatible with the DO-219AB package footprint?

A: Yes. All listed substitute parts use the DO-219AB (Sub SMA) package specification, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the SS310L RFG.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage variations (800 mV to 860 mV) are within normal Schottky diode operating ranges and do not affect circuit functionality in standard rectification applications. Power dissipation calculations should account for the specific Vf value of the selected substitute.

Q: Can SS310L RFG be used in automotive applications?

A: The base SS310L RFG does not carry AEC-Q101 qualification. For automotive applications requiring qualification, select SS1FH10HM3/H or SS2FH10HM3/H from Vishay, which include AEC-Q101 automotive qualification.

Q: What is the significance of the extended temperature range (-55°C to 175°C) in Vishay parts?

A: The extended upper temperature limit provides 25°C additional thermal margin compared to the original -55°C to 150°C specification. This is beneficial for applications operating in high-temperature environments or with limited thermal management.

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