SS310 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS310 is a surface mount Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative package configurations or thermal specifications. The parts listed below maintain electrical equivalence within the specified parameter ranges while offering different packaging options, compliance certifications, or inventory availability.

Substiute Parts

SS310

Taiwan Semiconductor CorporationIn Stock: 350424SS310 Datasheet

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SS310

MDDIn Stock: 350477SS310 Datasheet

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30BQ100

Vishay General Semiconductor - Diodes DivisionIn Stock: 530630BQ100 Datasheet

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MB310_R1_00001

Panjit International Inc.In Stock: 1524MB310_R1_00001 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS310 Schottky diode is determined by matching the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) Maximum: 100 V
• Current - Average Rectified (Io): 3 A
• Technology: Schottky
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Package Compatibility: Substitute parts must use either DO-214AB (SMC) or DO-214AC (SMA) package configurations, as these are mechanically and electrically compatible for surface mount applications.

Compliance Considerations: RoHS compliance status and operating temperature range are secondary selection criteria that may influence suitability depending on application requirements and regulatory constraints.

The three substitute parts identified below satisfy the mandatory electrical parameters while offering variations in package type, forward voltage characteristics, reverse leakage current, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

SS310 (MDD) - Direct Electrical Equivalent with Package Variation

The MDD SS310 maintains identical voltage and current ratings with fast recovery speed classification. This part is Active status and RoHS compliant. The primary distinction is the DO-214AC (SMA) package configuration instead of DO-214AB (SMC). This substitute is suitable for applications where SMA package footprints are acceptable. Operating temperature range is limited to -55 to 125 °C compared to the main part's -55 to 150 °C specification. Forward voltage is 850 mV at 3 A, and reverse leakage is 500 µA at 100 V.

30BQ100 (Vishay General Semiconductor) - Electrical Equivalent with Obsolete Status

The Vishay 30BQ100 matches all critical electrical parameters including 100 V reverse voltage, 3 A current rating, and fast recovery speed. Package configuration is DO-214AB (SMC), identical to the main part. This part is classified as Obsolete product status and carries RoHS non-compliant certification. Operating temperature range extends to -55 to 175 °C, providing superior thermal capability. Forward voltage is 790 mV at 3 A. This substitute is not recommended for new designs due to obsolete status and non-compliance with current RoHS requirements.

MB310_R1_00001 (Panjit International Inc.) - Electrical Equivalent with Enhanced Specifications

The Panjit MB310_R1_00001 satisfies all mandatory electrical parameters with 100 V reverse voltage, 3 A current rating, and fast recovery speed. Package is DO-214AB (SMC), matching the main part. This part is Active status with ROHS3 compliance. Operating temperature range is -65 to 175 °C, providing the widest thermal operating window. Reverse leakage current is 50 µA at 100 V, the lowest among all substitutes. Forward voltage is 800 mV at 3 A. Capacitance is specified at 140 pF at 4 V, 1 MHz. This substitute offers the most favorable electrical characteristics and compliance profile for new designs.

Frequently Asked Questions (FAQ)

Q: Can the MDD SS310 (SMA package) be used as a direct replacement for the Taiwan Semiconductor SS310 (SMC package)?

A: The MDD SS310 is electrically equivalent in voltage, current, and speed specifications. However, the package configuration differs: SMA (DO-214AC) versus SMC (DO-214AB). PCB footprint compatibility must be verified before substitution. If the circuit board is designed for SMC packages, the SMA variant requires layout modification.

Q: Why is the Vishay 30BQ100 listed as a substitute if it is marked Obsolete?

A: The 30BQ100 is included because it meets all mandatory electrical parameters and maintains the same DO-214AB (SMC) package as the main part. However, obsolete status indicates limited future availability and potential supply discontinuation. This part is suitable only for legacy system maintenance or repair applications where existing inventory exists. New designs should not incorporate obsolete components.

Q: What is the significance of reverse leakage current differences among the substitutes?

A: Reverse leakage current affects power dissipation and circuit performance under reverse bias conditions. The main SS310 specifies 100 µA at 100 V. The MDD and Vishay substitutes specify 500 µA, representing higher leakage. The Panjit MB310_R1_00001 specifies 50 µA, representing lower leakage. Applications sensitive to reverse bias power loss should prioritize the Panjit part.

Q: Are all substitute parts suitable for RoHS-regulated applications?

A: No. The Vishay 30BQ100 is marked RoHS non-compliant and is unsuitable for applications subject to RoHS directives. The MDD SS310 is RoHS compliant. The Panjit MB310_R1_00001 is ROHS3 compliant, meeting the most current RoHS requirements. For regulated applications, select either the MDD or Panjit substitutes.

Q: How do operating temperature ranges affect part selection?

A: The main SS310 operates from -55 to 150 °C. The MDD substitute is limited to -55 to 125 °C, reducing the upper thermal margin by 25 °C. The Vishay and Panjit substitutes extend to 175 °C, providing 25 °C additional thermal headroom. Applications operating near temperature extremes should account for these differences in thermal design calculations.

Q: What packaging considerations apply when selecting between DO-214AB (SMC) and DO-214AC (SMA) configurations?

A: DO-214AB (SMC) and DO-214AC (SMA) are distinct surface mount packages with different footprints and land patterns. SMC packages are larger than SMA packages. PCB design files, assembly equipment, and pick-and-place programming are package-specific. Substitution between these packages requires PCB layout revision and assembly process validation.

Q: Can forward voltage differences impact circuit performance?

A: Forward voltage specifications range from 790 mV (Vishay) to 850 mV (MDD) at 3 A. These differences affect voltage drop across the diode during forward conduction. In power supply and rectification circuits, cumulative voltage drop may influence output voltage regulation and efficiency. Applications with tight voltage tolerance requirements should account for these variations in circuit design.