SS35-M3/9AT Equivalent & Substitute Parts

Part Overview

The SS35-M3/9AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as Active and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Schottky diode rectifier category. Alternative part numbers may be required due to packaging format availability, inventory considerations, or specific application requirements such as automotive qualification.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 3 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS35-M3/9AT are grouped into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Full Electrical Match): Parts that match all critical electrical parameters—50 V reverse voltage, 3 A average rectified current, 750 mV forward voltage at 3 A, and fast recovery speed—while maintaining the DO-214AB (SMC) package footprint. These parts differ only in packaging format (Tape & Reel versus Cut Tape) or manufacturer source. Parametric equivalents include SS35-E3/57T, SS35-E3/9AT, SS35HE3_B/I, SK35_R1_00001, and SS35 (Taiwan Semiconductor Corporation).

Manufacturer Recommended Substitute (Partial Electrical Variation): The STPS340S from STMicroelectronics is designated as a manufacturer-recommended alternative. This part maintains the 3 A current rating and DO-214AB (SMC) package but operates at a reduced maximum reverse voltage of 40 V (versus 50 V) and exhibits lower forward voltage (630 mV @ 3 A) and reverse leakage current (20 µA @ 40 V). This substitute is suitable only for applications where the 40 V voltage rating is sufficient.

Discontinued Status: SS35 V7G from Taiwan Semiconductor Corporation is marked as discontinued at DiGi Electronics and should not be selected for new designs.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Packaging Format	Product Status	Automotive Grade
SS35-M3/9AT	Vishay General Semiconductor	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Tape & Reel (TR)	Active	No
SS35-E3/57T	Vishay General Semiconductor	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Cut Tape (CT) & Digi-Reel®	Active	No
SS35-E3/9AT	Vishay General Semiconductor	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Tape & Reel (TR)	Active	No
SS35HE3_B/I	Vishay General Semiconductor	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Tape & Reel (TR)	Active	Yes (AEC-Q101)
STPS340S	STMicroelectronics	40	3	630 @ 3 A	20 @ 40 V	DO-214AB (SMC)	Cut Tape (CT) & Digi-Reel®	Active	No
SK35_R1_00001	Panjit International Inc.	50	3	750 @ 3 A	100 @ 50 V	DO-214AB (SMC)	Tape & Reel (TR)	Active	No
SS35	Taiwan Semiconductor Corporation	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Not specified	Active	No
SS35 V7G	Taiwan Semiconductor Corporation	50	3	750 @ 3 A	500 @ 50 V	DO-214AB (SMC)	Not specified	Discontinued at DiGi Electronics	No

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select SS35-E3/57T, SS35-E3/9AT, or SS35HE3_B/I when full parametric equivalence to the SS35-M3/9AT is required. All three parts maintain 50 V reverse voltage, 3 A current rating, and 750 mV forward voltage specifications. SS35HE3_B/I is qualified to AEC-Q101 automotive standards and is suitable for automotive applications. SS35-E3/57T offers Cut Tape & Digi-Reel® packaging, which may be preferred for certain procurement workflows. SS35-E3/9AT maintains the same Tape & Reel format as the original part.

For Voltage-Reduced Applications: The STPS340S from STMicroelectronics is applicable only when the application circuit operates at maximum reverse voltages of 40 V or lower. This part exhibits superior forward voltage characteristics (630 mV versus 750 mV) and significantly lower reverse leakage current (20 µA versus 500 µA), which may provide thermal and efficiency benefits in low-voltage applications. The DO-214AB (SMC) package footprint remains compatible.

For Cross-Manufacturer Equivalence: SK35_R1_00001 from Panjit International Inc. provides a full parametric match with 50 V rating and 3 A current capacity. Reverse leakage current is specified at 100 µA @ 50 V, which is lower than the Vishay SS35-M3/9AT specification of 500 µA @ 50 V. This part is suitable for applications where lower leakage current is beneficial.

Parts to Avoid: SS35 V7G is discontinued at DiGi Electronics and should not be selected for new designs or long-term production commitments.

Frequently Asked Questions (FAQ)

Q: Can SS35-E3/57T be used as a direct replacement for SS35-M3/9AT? A: Yes. SS35-E3/57T is a parametric equivalent with identical electrical specifications (50 V, 3 A, 750 mV forward voltage). The only difference is packaging format: SS35-E3/57T is supplied in Cut Tape & Digi-Reel® format, while SS35-M3/9AT is supplied in Tape & Reel format. Both use the same DO-214AB (SMC) package footprint and are compatible with identical PCB layouts.

Q: What is the difference between SS35HE3_B/I and SS35-M3/9AT? A: Electrically, both parts are identical: 50 V reverse voltage, 3 A current, 750 mV forward voltage, and fast recovery speed. The key difference is that SS35HE3_B/I carries AEC-Q101 automotive qualification, making it suitable for automotive applications. Both use Tape & Reel packaging and the DO-214AB (SMC) package.

Q: Is STPS340S a suitable replacement for all applications? A: STPS340S is suitable only for applications where the maximum reverse voltage requirement is 40 V or lower. The part cannot be used in circuits designed for 50 V operation. However, STPS340S offers lower forward voltage (630 mV) and lower reverse leakage current (20 µA), which may provide advantages in low-voltage applications.

Q: What is the difference between SS35 from Taiwan Semiconductor Corporation and SS35-M3/9AT from Vishay? A: Both parts have identical electrical specifications: 50 V, 3 A, 750 mV forward voltage, and fast recovery speed. They use the same DO-214AB (SMC) package. The difference is manufacturer source. The Taiwan Semiconductor Corporation version does not specify a packaging format in the provided data.

Q: Can SK35_R1_00001 replace SS35-M3/9AT? A: Yes. SK35_R1_00001 is a parametric equivalent with 50 V reverse voltage and 3 A current rating. The forward voltage specification is identical at 750 mV @ 3 A. Reverse leakage current is specified at 100 µA @ 50 V, which is lower than the SS35-M3/9AT specification of 500 µA @ 50 V. Both parts use the DO-214AB (SMC) package and are compatible with identical PCB layouts.

Q: Why would I choose a substitute part over the original SS35-M3/9AT? A: Substitute parts may be selected based on packaging format availability (Cut Tape versus Tape & Reel), inventory levels, specific certifications (such as AEC-Q101 automotive qualification for SS35HE3_B/I), or manufacturer preference. All parametric equivalents maintain identical electrical performance for direct circuit replacement.

Q: Is SS35 V7G still available for purchase? A: No. SS35 V7G is marked as discontinued at DiGi Electronics and should not be selected for new designs or production commitments. Use SS35 (current version) from Taiwan Semiconductor Corporation or other active alternatives instead.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean? A: This specification indicates that the diode exhibits fast recovery characteristics with a recovery time of 500 nanoseconds or less when switching at currents greater than 200 mA. This parameter is consistent across all substitute parts listed and ensures compatibility in high-frequency switching applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed—SS35-E3/57T, SS35-E3/9AT, SS35HE3_B/I, STPS340S, SK35_R1_00001, and SS35—are ROHS3 compliant. All parts also have Moisture Sensitivity Level (MSL) 1 (Unlimited) and are REACH unaffected.

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