S3MB-TP Equivalent & Substitute Parts

Part Overview

The S3MB-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 1000 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter ranges.

Substiute Parts

S3MB-TP

Micro Commercial CoIn Stock: 3382S3MB-TP Datasheet

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RS3MB-13-F

Diodes IncorporatedIn Stock: 10367RS3MB-13-F Datasheet

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S3KB

Taiwan Semiconductor CorporationIn Stock: 75312S3KB Datasheet

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S3MB

MDDIn Stock: 6444S3MB Datasheet

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S3MB-13-F

Diodes IncorporatedIn Stock: 155236S3MB-13-F Datasheet

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STTH208U

STMicroelectronicsIn Stock: 20394STTH208U Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S3MB-TP are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
• Current - Average Rectified (Io): Must equal or exceed 3 A
• Mounting Type: Must be Surface Mount
• Package / Case: Must be DO-214AA or SMB compatible

Secondary Compatibility Factors:

• Voltage - Forward (Vf) (Max) @ If: Operating point compatibility
• Speed Classification: Recovery time characteristics
• Current - Reverse Leakage @ Vr: Leakage current performance
• RoHS Status: Regulatory compliance requirement (ROHS3 Compliant)
• Moisture Sensitivity Level (MSL): Handling and storage requirements

Parts meeting all primary criteria are classified as direct substitutes. Parts with reduced voltage or current ratings are classified as limited substitutes and are suitable only when circuit design permits operation at lower ratings.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Full Electrical and Mechanical Equivalence):

The following parts meet all primary substitution criteria and are suitable for direct replacement in applications requiring 1000 V, 3 A rectifier diodes in SMB packages:

• S3MB-13-F (Diodes Incorporated): Identical voltage and current ratings with standard recovery speed. Operating temperature range -65°C to 150°C. ROHS3 compliant with MSL 1.

• S3MB (MDD): Identical voltage and current ratings with standard recovery speed. Operating temperature range -55°C to 150°C. ROHS3 compliant with MSL 1. Forward voltage 1.1 V @ 3 A provides lower conduction loss.

Conditional Substitutes (Reduced Voltage Rating):

The following parts have reduced voltage ratings and are suitable only when circuit design permits operation at lower maximum reverse voltages:

• S3KB (Taiwan Semiconductor Corporation): 800 V maximum reverse voltage with 3 A current rating. Standard recovery speed. Operating temperature range -55°C to 150°C. ROHS3 compliant with MSL 1. Suitable for applications with maximum reverse voltage requirements of 800 V or less.

Limited Substitutes (Reduced Current Rating):

The following part has reduced current rating and is suitable only when circuit design permits operation at lower maximum average rectified current:

• STTH208U (STMicroelectronics): 800 V maximum reverse voltage with 2 A current rating. Fast recovery speed with 75 ns reverse recovery time. Maximum junction temperature 175°C. ROHS3 compliant with MSL 1. Suitable for applications with maximum current requirements of 2 A or less and maximum reverse voltage of 800 V or less.

Alternative with Enhanced Recovery Characteristics:

• RS3MB-13-F (Diodes Incorporated): Identical voltage and current ratings (1000 V, 3 A) with fast recovery speed (≤500 ns). Operating temperature range -65°C to 150°C. ROHS3 compliant with MSL 1. Forward voltage 1.3 V @ 3 A. Suitable for applications requiring faster switching characteristics.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, ensuring compatibility with standard handling and storage procedures.

Frequently Asked Questions (FAQ)

Q: Can S3MB-13-F be used as a direct replacement for S3MB-TP?

A: Yes. Both parts have identical voltage (1000 V) and current (3 A) ratings, standard recovery speed classification, and compatible DO-214AA SMB packages. Both are ROHS3 compliant with MSL 1. The primary difference is manufacturer (Diodes Incorporated vs. Micro Commercial Co) and packaging format (Cut Tape & Digi-Reel vs. Tape & Reel).

Q: What is the difference between S3MB and S3MB-13-F?

A: Both parts have identical voltage (1000 V) and current (3 A) ratings and standard recovery speed. Key differences are: S3MB is manufactured by MDD with forward voltage 1.1 V @ 3 A and operating temperature -55°C to 150°C; S3MB-13-F is manufactured by Diodes Incorporated with forward voltage 1.15 V @ 3 A and operating temperature -65°C to 150°C. S3MB offers lower conduction loss due to lower forward voltage.

Q: Can S3KB be used instead of S3MB-TP?

A: S3KB is a conditional substitute. It maintains the 3 A current rating and SMB package compatibility but has a reduced maximum reverse voltage of 800 V compared to 1000 V for S3MB-TP. Substitution is permissible only when circuit design specifications allow operation at 800 V maximum reverse voltage or lower.

Q: What is the advantage of RS3MB-13-F over S3MB-TP?

A: RS3MB-13-F maintains identical voltage (1000 V) and current (3 A) ratings but features fast recovery speed (≤500 ns) compared to standard recovery (>500 ns) for S3MB-TP. Fast recovery reduces switching losses and improves efficiency in high-frequency applications. Forward voltage is 1.3 V @ 3 A, which is slightly higher than S3MB-TP at 1.15 V @ 3 A.

Q: Why is STTH208U listed as a limited substitute?

A: STTH208U has reduced electrical ratings: 800 V maximum reverse voltage (vs. 1000 V) and 2 A average rectified current (vs. 3 A). Substitution is permissible only when circuit design permits operation within these lower ratings. The part offers fast recovery speed (75 ns) and higher maximum junction temperature (175°C).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of S3MB-TP.

Q: What packaging formats are available for substitute parts?

A: S3MB-TP is supplied in Tape & Reel (TR) format. Substitute parts are available in Cut Tape (CT) & Digi-Reel® formats (S3MB-13-F, RS3MB-13-F, STTH208U, S3KB) or unspecified packaging (S3MB). Verify packaging requirements for your procurement process.

Q: Can forward voltage differences affect circuit performance?

A: Yes. Forward voltage differences between substitute parts affect conduction loss and voltage drop across the diode. S3MB has the lowest forward voltage (1.1 V @ 3 A), while STTH208U has the highest (1.65 V @ 2 A). Select substitutes based on circuit tolerance for voltage drop and power dissipation requirements.

Q: What is the significance of recovery speed classification?

A: Recovery speed determines switching characteristics. Standard recovery (>500 ns) is suitable for low-frequency and linear applications. Fast recovery (≤500 ns) reduces switching losses and is preferred for high-frequency switching applications. RS3MB-13-F and STTH208U offer fast recovery; other substitutes provide standard recovery matching S3MB-TP.