S3MHR7G Equivalent & Substitute Parts

Part Overview

The S3MHR7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 1000 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts that meet or exceed the electrical and mechanical specifications for continued system support and procurement.

Substiute Parts

S3MHR7G

Taiwan Semiconductor CorporationIn Stock: 1095S3MHR7G Datasheet

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CGRC507-G

Comchip TechnologyIn Stock: 1008CGRC507-G Datasheet

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RS3M-13-F

Diodes IncorporatedIn Stock: 80422RS3M-13-F Datasheet

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RS3MB-13-F

Diodes IncorporatedIn Stock: 10367RS3MB-13-F Datasheet

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S3M-13-F

Diodes IncorporatedIn Stock: 15193S3M-13-F Datasheet

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S3M-TP

Micro Commercial CoIn Stock: 321341S3M-TP Datasheet

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S3MB-13-F

Diodes IncorporatedIn Stock: 155236S3MB-13-F Datasheet

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S5MC-13-F

Diodes IncorporatedIn Stock: 15485S5MC-13-F Datasheet

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S5ML-TP

Micro Commercial CoIn Stock: 4296S5ML-TP Datasheet

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S8MC-13

Diodes IncorporatedIn Stock: 155122S8MC-13 Datasheet

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SMLJ60S10-TP

Micro Commercial CoIn Stock: 12921SMLJ60S10-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the S3MHR7G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain the 1000 V DC reverse voltage specification to ensure circuit protection and reliability.

Current Rating: Substitute parts are grouped into two categories: direct 3 A replacements and higher-current alternatives (5 A, 6 A, 8 A) that provide design margin and are electrically compatible in applications where the original 3 A rating is not a limiting constraint.

Package Compatibility: The primary substitute group maintains the DO-214AB (SMC) package for direct PCB layout compatibility. A secondary group includes DO-214AA (SMB) package variants, which require PCB footprint modification but offer identical electrical performance.

Forward Voltage: Substitute parts with forward voltage specifications at or below 1.15 V @ 3 A are considered direct electrical equivalents. Parts with forward voltage specifications at different current levels (5 A, 6 A, 8 A) are evaluated for their performance envelope.

Recovery Characteristics: Standard recovery (>500ns) parts are grouped separately from fast recovery (≤500ns) parts. The S3MHR7G specifies standard recovery; fast recovery substitutes are listed for applications requiring improved switching performance.

Compliance & Status: All substitute parts are active products with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

S3M-13-F and S3M-TP are direct functional replacements for the S3MHR7G. Both maintain identical voltage and current ratings, standard recovery characteristics, and DO-214AB (SMC) package compatibility. S3M-13-F is manufactured by Diodes Incorporated with 15100 units in stock. S3M-TP is manufactured by Micro Commercial Co with significantly higher inventory (321300 units), providing superior supply chain availability. Both parts are active products with ROHS3 compliance.

Package-Compatible Alternatives (Same Electrical Performance, Different Package):

S3MB-13-F maintains identical electrical specifications to the S3MHR7G but uses the DO-214AA (SMB) package. This substitution requires PCB footprint modification and is suitable for applications where package size constraints are not critical. Diodes Incorporated manufactures this part with 155200 units in stock.

Higher Current Capacity Substitutes (Design Margin Enhancement):

S5MC-13-F, S5ML-TP, SMLJ60S10-TP, and S8MC-13 provide increased current ratings (5 A, 5 A, 6 A, and 8 A respectively) while maintaining the 1000 V voltage specification and standard recovery characteristics. These parts are electrically compatible in applications where the original 3 A rating provides insufficient margin. All maintain DO-214AB (SMC) package compatibility. S8MC-13 offers the highest current capacity with 155100 units in stock.

Fast Recovery Alternative:

RS3M-13-F and RS3MB-13-F provide fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the S3MHR7G. These parts are suitable for applications requiring improved switching performance or reduced reverse recovery losses. Both are active products with ROHS3 compliance.

Comchip Technology Alternative:

CGRC507-G is a 5 A rated part from Comchip Technology with identical voltage and recovery characteristics. This part provides an alternative sourcing option with 978 units in stock.

Frequently Asked Questions (FAQ)

Q: Can S3M-13-F be used as a direct replacement for S3MHR7G?

A: Yes. S3M-13-F is a direct electrical equivalent with identical voltage rating (1000 V), current rating (3 A), forward voltage (1.15 V @ 3 A), recovery characteristics (standard >500ns), and package (DO-214AB SMC). Both are ROHS3 compliant and suitable for identical circuit applications.

Q: What is the difference between S3M-13-F and S3M-TP?

A: Both parts are electrically equivalent with identical voltage and current ratings. The primary differences are manufacturer (Diodes Incorporated vs. Micro Commercial Co), forward voltage specification (1.15 V vs. 1.2 V @ 3 A), and inventory availability (15100 vs. 321300 units). S3M-TP offers superior supply chain availability.

Q: Can I use S5MC-13-F instead of S3MHR7G?

A: Yes, with design consideration. S5MC-13-F has a higher current rating (5 A vs. 3 A) and identical voltage rating (1000 V). The forward voltage is identical (1.15 V @ 5 A). This substitution provides design margin and is electrically compatible. The DO-214AB (SMC) package is identical, requiring no PCB modification.

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

A: Both are surface mount packages for rectifier diodes. DO-214AB (SMC) and DO-214AA (SMB) differ in physical dimensions and PCB footprint. S3MB-13-F uses the DO-214AA (SMB) package and requires PCB footprint modification compared to the S3MHR7G. Electrical performance is identical.

Q: Why would I choose a fast recovery diode like RS3M-13-F over a standard recovery part?

A: Fast recovery diodes (≤500ns) reduce reverse recovery losses and switching losses compared to standard recovery parts (>500ns). RS3M-13-F is suitable for applications requiring improved efficiency or reduced electromagnetic interference. The trade-off is a slightly higher forward voltage (1.3 V vs. 1.15 V @ 3 A).

Q: Is S8MC-13 compatible with circuits designed for S3MHR7G?

A: Yes, with design consideration. S8MC-13 has a higher current rating (8 A vs. 3 A) and identical voltage rating (1000 V). The forward voltage is lower (985 mV @ 8 A vs. 1.15 V @ 3 A). This substitution provides significant design margin and improved efficiency. The DO-214AB (SMC) package is identical, requiring no PCB modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging is supplied on continuous reels suitable for automated assembly equipment. Cut Tape (CT) packaging is supplied in smaller quantities on tape segments. Both contain identical components; the difference is in supply format and handling for manufacturing processes.