S3M-M3/9AT Equivalent & Substitute Parts

Part Overview

The S3M-M3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 1000 V DC reverse voltage with 3 A average rectified current in a DO-214AB (SMC) package. The part is currently active in production with 789 pieces in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the same package type and thermal operating range. Alternative sources and packaging formats are documented to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2.5 A	V
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Packaging Format	Tape & Reel (TR)	—

Substitute Part Grouping Explanation

Substitution eligibility for the S3M-M3/9AT is determined by the following criteria:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C

Acceptable Variations:

Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) does not affect electrical equivalence
Forward voltage (Vf) within 1.15 V @ 2.5 A or 1.15 V @ 3 A is acceptable
Reverse recovery time (trr) between 1.5 µs and 2.5 µs is acceptable
Reverse leakage current between 5 µA and 10 µA @ 1000 V is acceptable
Automotive-grade variants (AEC-Q101 qualified) are electrically equivalent to standard-grade parts

Substitute parts are grouped by manufacturer and packaging format while maintaining full electrical and thermal compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs]	Ir @ Vr [µA]	Package	Packaging Format	Temp Range [°C]	Status
S3M-M3/9AT	Vishay General Semiconductor	1000	3	1.15 @ 2.5 A	2.5	10 @ 1000 V	DO-214AB (SMC)	Tape & Reel	-55 to 150	Active
S3M-E3/57T	Vishay General Semiconductor	1000	3	1.15 @ 2.5 A	2.5	10 @ 1000 V	DO-214AB (SMC)	Cut Tape	-55 to 150	Active
S3M-E3/9AT	Vishay General Semiconductor	1000	3	1.15 @ 2.5 A	2.5	10 @ 1000 V	DO-214AB (SMC)	Cut Tape & Digi-Reel	-55 to 150	Active
S3MHE3_A/H	Vishay General Semiconductor	1000	3	1.15 @ 2.5 A	2.5	10 @ 1000 V	DO-214AB (SMC)	Tape & Reel	-55 to 150	Active
S3MHE3_A/I	Vishay General Semiconductor	1000	3	1.15 @ 2.5 A	2.5	10 @ 1000 V	DO-214AB (SMC)	Tape & Reel	-55 to 150	Active
S3M	Diotec Semiconductor	1000	3	1.15 @ 3 A	1.5	5 @ 1000 V	DO-214AB (SMC)	Cut Tape & Digi-Reel	-50 to 150	Active
S3M V7G	Taiwan Semiconductor Corporation	1000	3	1.15 @ 3 A	1.5	10 @ 1000 V	DO-214AB (SMC)	Tape & Reel	-55 to 150	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Vishay General Semiconductor - Diodes Division (Standard Grade): The S3M-E3/57T, S3M-E3/9AT, and S3M-M3/9AT are electrically identical standard-grade rectifier diodes. Selection between these parts is determined by packaging format requirements. The S3M-E3/57T offers Cut Tape packaging with the highest inventory (34,200 pieces). The S3M-E3/9AT provides Cut Tape and Digi-Reel options with 24,300 pieces in stock. The S3M-M3/9AT is supplied in Tape & Reel format with 789 pieces available.

Vishay General Semiconductor - Automotive Grade (AEC-Q101): The S3MHE3_A/H and S3MHE3_A/I are automotive-qualified variants with identical electrical specifications to the standard-grade parts. These parts carry AEC-Q101 qualification and are suitable for automotive applications. The S3MHE3_A/H has 21,650 pieces in stock, while the S3MHE3_A/I has 5,600 pieces available. Both are supplied in Tape & Reel packaging.

Diotec Semiconductor (Alternative Manufacturer): The S3M from Diotec Semiconductor meets all electrical requirements with improved reverse recovery time (1.5 µs versus 2.5 µs) and lower reverse leakage current (5 µA versus 10 µA). The minimum operating temperature is -50°C compared to -55°C for Vishay parts. This part is available in Cut Tape and Digi-Reel formats with 9,293 pieces in stock.

Taiwan Semiconductor Corporation (Discontinued): The S3M V7G is electrically equivalent but is discontinued at DiGi Electronics with only 2,480 pieces remaining in inventory. This part should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute S3M-E3/57T for S3M-M3/9AT in my design?

A: Yes. Both parts are electrically identical with 1000 V reverse voltage, 3 A average rectified current, and identical forward voltage, reverse recovery time, and reverse leakage specifications. The difference is packaging format: S3M-E3/57T is supplied in Cut Tape while S3M-M3/9AT is supplied in Tape & Reel. Verify your assembly equipment can accommodate the packaging format.

Q: What is the difference between standard-grade and automotive-grade S3M diodes?

A: The S3MHE3_A/H and S3MHE3_A/I are automotive-grade variants qualified to AEC-Q101. Electrically, they are identical to standard-grade parts (S3M-E3/57T, S3M-E3/9AT, S3M-M3/9AT). Automotive-grade parts are required for applications subject to automotive qualification requirements. Standard-grade parts are suitable for general industrial and consumer applications.

Q: Is the Diotec S3M a direct replacement for the Vishay S3M-M3/9AT?

A: The Diotec S3M meets all electrical requirements and is mechanically compatible in the DO-214AB (SMC) package. The Diotec part offers improved performance with faster reverse recovery time (1.5 µs versus 2.5 µs) and lower reverse leakage current (5 µA versus 10 µA). The minimum operating temperature is -50°C instead of -55°C. Verify compliance requirements for your application before substitution.

Q: Why is the S3M V7G listed as discontinued?

A: The S3M V7G from Taiwan Semiconductor Corporation is discontinued at DiGi Electronics with limited inventory (2,480 pieces). This part should not be selected for new designs. Use S3M-E3/57T, S3M-E3/9AT, or S3MHE3_A/H as alternatives.

Q: Can I use different packaging formats interchangeably?

A: Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) affects only the supply and handling method, not electrical performance. However, your assembly equipment must be compatible with the selected packaging format. Verify your pick-and-place system specifications before changing packaging formats.

Q: What parameters must remain identical for a valid substitution?

A: The following parameters must match exactly: Voltage - DC Reverse (Vr) at 1000 V, Current - Average Rectified (Io) at 3 A, Package type (DO-214AB, SMC), and Mounting type (Surface Mount). Operating temperature range must encompass your application requirements. Forward voltage, reverse recovery time, and reverse leakage current may vary within the specified ranges without affecting circuit function.

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