SR310H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR310H is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100V DC reverse voltage and 3A average rectified current in a DO-201AD axial through-hole package. This component is qualified to AEC-Q101 automotive standards and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility within the specified parameter ranges.

Substiute Parts

SR310H

Taiwan Semiconductor CorporationIn Stock: 728SR310H Datasheet

Current PartRFQ

SB3100-T

Diodes IncorporatedIn Stock: 1337SB3100-T Datasheet

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SB5100-T

Diodes IncorporatedIn Stock: 3809SB5100-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SR310H are qualified based on the following criteria:

Electrical Compatibility Requirements:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 100V
• Current - Average Rectified (Io): Equal to or greater than 3A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole

Compliance & Regulatory Requirements:

• RoHS Status: ROHS3 Compliant
• Product Status: Active
• REACH Status: REACH Unaffected

The substitute parts SB3100-T and SB5100-T meet these criteria. SB3100-T provides equivalent current rating (3A) with improved forward voltage characteristics. SB5100-T provides higher current capability (5A) while maintaining the same voltage rating and package form factor, suitable for applications requiring additional current margin.

Parameter Comparison

Engineering Selection Recommendations

SR310H (Main Part): The SR310H is the primary component specification. It is active, ROHS3 compliant, and qualified to AEC-Q101 automotive standards. Current inventory is 633 pieces in new original condition.

SB3100-T (Direct Equivalent): The SB3100-T from Diodes Incorporated is electrically equivalent at the 3A current rating with identical voltage specifications. It demonstrates superior forward voltage performance (790 mV vs. 850 mV @ 3A), resulting in lower power dissipation. Operating temperature range extends to -65°C, providing wider environmental coverage. This part is suitable for direct substitution in applications where the 3A current requirement is fixed. Inventory availability is higher at 1232 pieces.

SB5100-T (Higher Current Capability): The SB5100-T provides 5A current rating while maintaining the same 100V voltage specification and DO-201AD package form factor. This part is suitable for applications where current margin or future design flexibility is required. The higher current rating does not compromise voltage or thermal characteristics. Inventory availability is highest at 3773 pieces. This part is not a direct replacement but a compatible upgrade for circuits designed to accept higher current capacity.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and active product status. Packaging format differs (Cut Tape vs. Tape & Reel), which does not affect electrical or mechanical compatibility in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can SB3100-T be used as a direct replacement for SR310H?

A: Yes. The SB3100-T meets all electrical and mechanical requirements for direct substitution. Both parts are rated for 100V reverse voltage and 3A average rectified current in the DO-201AD package. The SB3100-T exhibits lower forward voltage (790 mV vs. 850 mV @ 3A), which reduces power dissipation. Operating temperature range is extended to -65°C on the SB3100-T.

Q: Can SB5100-T be used as a direct replacement for SR310H?

A: The SB5100-T is mechanically and electrically compatible but is not a direct replacement. It provides 5A current rating versus the 3A requirement of SR310H. This higher current capability is suitable for circuits where additional current margin is acceptable or beneficial. The part maintains the same voltage rating, package form factor, and thermal characteristics.

Q: What are the key differences between the substitute parts?

A: SB3100-T and SB5100-T differ primarily in current rating (3A vs. 5A) and reverse leakage current specification. Both maintain identical voltage ratings (100V), package form factor (DO-201AD), and fast recovery speed characteristics. SB5100-T includes specified capacitance (400pF @ 4V, 1MHz), which is not specified for the other parts.

Q: Does packaging format affect compatibility?

A: Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical or mechanical compatibility in through-hole applications. The difference is in supply format and handling. Both formats contain the same component in the DO-201AD package.

Q: Are all substitute parts automotive qualified?

A: The SR310H is qualified to AEC-Q101 automotive standards. The substitute parts SB3100-T and SB5100-T do not list AEC-Q101 qualification in the provided specifications. Applications requiring automotive qualification should verify this requirement with the manufacturer.

Q: What is the impact of forward voltage differences?

A: The SR310H specifies 850 mV forward voltage at 3A, while SB3100-T specifies 790 mV at 3A. Lower forward voltage results in reduced power dissipation and heat generation. For circuits operating at or near the 3A rating, this difference may improve thermal performance and efficiency.

Q: Can these parts be used interchangeably in existing designs?

A: SB3100-T can be used interchangeably with SR310H without design modification. SB5100-T can be used in circuits designed for SR310H, but the higher current rating should be verified as acceptable for the specific application. All parts share identical voltage ratings, package form factor, and mounting type.