S3M Equivalent & Substitute Parts

Part Overview

The onsemi S3M is a 1000 V, 3 A surface mount rectifier diode in DO-214AB (SMC) package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Equivalent and substitute parts are necessary for ongoing production support, maintenance applications, and design continuity where the S3M specification remains applicable.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Standard Recovery
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the S3M is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr): 1000 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-214AB (SMC) or compatible surface mount package
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

Voltage - Forward (Vf): Up to 1.3 V @ rated current
Operating Temperature - Junction: -55°C minimum to 150°C minimum
Reverse Recovery Time (trr): Standard or Fast Recovery acceptable
Current - Reverse Leakage: Up to 10 µA @ rated voltage

Parts are grouped into three categories:

Direct Equivalents: Identical voltage and current ratings, DO-214AB package, active product status.

Functional Equivalents: Matching voltage and current ratings, DO-214AB package, may have different manufacturers or slightly different electrical characteristics within acceptable ranges.

Package Variants: Matching voltage and current ratings with alternative surface mount packages (SMB instead of SMC).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	Trr	Ir @ Vr
S3M	onsemi	1000 V	3 A	1.2 V @ 3 A	DO-214AB, SMC	Not For New Designs	2.5 µs	5 µA @ 1000 V
S3M-E3/57T	Vishay General Semiconductor	1000 V	3 A	1.15 V @ 2.5 A	DO-214AB, SMC	Active	2.5 µs	10 µA @ 1000 V
S3M-TP	Micro Commercial Co	1000 V	3 A	1.2 V @ 3 A	DO-214AB, SMC	Active	Standard Recovery	10 µA @ 1000 V
CMR3-10 BK PBFREE	Central Semiconductor Corp	1000 V	3 A	1.2 V @ 3 A	DO-214AB, SMC	Active	Standard Recovery	5 µA @ 1000 V
CMR3-10 TR13 PBFREE	Central Semiconductor Corp	1000 V	3 A	1.2 V @ 3 A	DO-214AB, SMC	Active	Standard Recovery	5 µA @ 1000 V
RS3M-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	DO-214AB, SMC	Active	500 ns	5 µA @ 1000 V
S3M-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	DO-214AB, SMC	Active	Standard Recovery	10 µA @ 1000 V
S3MB-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	DO-214AA, SMB	Active	Standard Recovery	10 µA @ 1000 V
RS3K-13-F	Diodes Incorporated	800 V	3 A	1.3 V @ 3 A	DO-214AB, SMC	Active	500 ns	5 µA @ 800 V
S3K-13-F	Diodes Incorporated	800 V	3 A	1.15 V @ 3 A	DO-214AB, SMC	Active	Standard Recovery	10 µA @ 800 V
MRA4007T3G	onsemi	1000 V	1 A	1.1 V @ 1 A	DO-214AC, SMA	Not For New Designs	Standard Recovery	10 µA @ 1000 V

Engineering Selection Recommendations

Direct Equivalent Selection (Preferred for Replacement):

For applications requiring direct replacement of the onsemi S3M with active product status, select from:

S3M-E3/57T (Vishay General Semiconductor): Active product status, identical voltage and current ratings, DO-214AB package, Cut Tape packaging available. Forward voltage specification at 2.5 A is 1.15 V, within acceptable range.
S3M-TP (Micro Commercial Co): Active product status, identical electrical specifications to original S3M, DO-214AB package, Tape & Reel packaging. Highest inventory availability (321,300 pcs).
S3M-13-F (Diodes Incorporated): Active product status, identical voltage and current ratings, DO-214AB package, Cut Tape & Digi-Reel packaging. Forward voltage 1.15 V @ 3 A.

Functional Equivalent Selection (Extended Operating Range):

CMR3-10 BK PBFREE (Central Semiconductor Corp): Active product status, identical electrical specifications, extended operating temperature range (-65°C to 175°C), DO-214AB package, Bulk packaging.
CMR3-10 TR13 PBFREE (Central Semiconductor Corp): Active product status, identical electrical specifications, extended operating temperature range (-65°C to 175°C), DO-214AB package, Tape & Reel packaging.

Fast Recovery Alternative:

RS3M-13-F (Diodes Incorporated): Active product status, identical voltage and current ratings, fast recovery characteristic (500 ns trr), DO-214AB package. Forward voltage 1.3 V @ 3 A.

Package Variant Selection (SMB Alternative):

S3MB-13-F (Diodes Incorporated): Active product status, identical voltage and current ratings, DO-214AA (SMB) package for applications requiring larger package footprint. Forward voltage 1.15 V @ 3 A.

Lower Voltage Alternatives (800 V Rating):

S3K-13-F (Diodes Incorporated): Active product status, 800 V reverse voltage, 3 A current, DO-214AB package. Suitable for applications where 800 V rating is sufficient.
RS3K-13-F (Diodes Incorporated): Active product status, 800 V reverse voltage, 3 A current, fast recovery (500 ns), DO-214AB package.

Not Recommended for Direct Substitution:

MRA4007T3G (onsemi): Current rating of 1 A is insufficient for 3 A application requirement. Different package (DO-214AC, SMA). Not suitable as equivalent.

Frequently Asked Questions (FAQ)

Q: Can I use S3M-TP as a direct replacement for the original onsemi S3M?

A: Yes. S3M-TP from Micro Commercial Co meets all critical parameters: 1000 V reverse voltage, 3 A average rectified current, DO-214AB (SMC) package, and ROHS3 compliance. It is an active product with identical electrical specifications to the original S3M.

Q: What is the difference between S3M-E3/57T and S3M-TP?

A: Both are direct equivalents with identical voltage and current ratings. S3M-E3/57T is manufactured by Vishay General Semiconductor with forward voltage specification at 2.5 A (1.15 V). S3M-TP is manufactured by Micro Commercial Co with forward voltage specification at 3 A (1.2 V). Both are acceptable replacements.

Q: Why are CMR3-10 parts listed as upgrades?

A: CMR3-10 BK PBFREE and CMR3-10 TR13 PBFREE offer extended operating temperature range (-65°C to 175°C) compared to the original S3M (-55°C to 150°C), while maintaining identical electrical specifications. They are considered upgrades for applications requiring wider temperature operation.

Q: Can I substitute an 800 V rated diode (S3K-13-F or RS3K-13-F) for the 1000 V S3M?

A: No. The S3M is rated for 1000 V reverse voltage. Substituting an 800 V rated part reduces the maximum reverse voltage capability and violates the mandatory matching parameter requirement. Use only 1000 V or higher rated parts.

Q: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?

A: DO-214AB (SMC) and DO-214AA (SMB) are different surface mount package sizes. SMC is smaller than SMB. S3MB-13-F uses the larger SMB package. Use SMB variant only if your PCB layout specifically requires the larger package footprint. Standard replacement uses SMC package.

Q: Is MRA4007T3G a suitable substitute for the S3M?

A: No. MRA4007T3G has a maximum average rectified current of 1 A, while the S3M is rated for 3 A. This part does not meet the mandatory current requirement and cannot be used as a substitute.

Q: What does "Not For New Designs" mean for the original S3M?

A: "Not For New Designs" indicates the onsemi S3M has reached end-of-life status. New designs should use active products such as S3M-TP, S3M-E3/57T, or S3M-13-F. Existing designs in production or maintenance can continue using equivalent active parts.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original S3M.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time affects switching speed. The original S3M has trr of 2.5 µs (standard recovery). Substitutes with identical or faster recovery characteristics are acceptable. RS3M-13-F and RS3K-13-F offer faster recovery (500 ns) for applications requiring higher switching frequency.

Q: Can I use RS3M-13-F instead of S3M-TP?

A: Yes, with consideration of recovery speed. RS3M-13-F has fast recovery (500 ns trr) versus standard recovery for S3M-TP. Both meet voltage and current requirements. Fast recovery may reduce switching losses in high-frequency applications but is not required for standard rectification.

Q: What packaging options are available for 1000 V, 3 A equivalents?

A: Cut Tape (CT), Tape & Reel (TR), and Bulk packaging are available across different manufacturers. S3M-TP offers the highest inventory in Tape & Reel format (321,300 pcs). Select packaging based on production volume and assembly requirements.

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