SS310HE-TP Equivalent & Substitute Parts

Part Overview

The SS310HE-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 3 A average rectified current in a surface mount SOD-123HE package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing production and maintenance applications. Equivalent parts must maintain electrical performance characteristics while accommodating available packaging and supplier options.

Substiute Parts

SS310HE-TP

Micro Commercial CoIn Stock: 1239SS310HE-TP Datasheet

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S310FA

onsemiIn Stock: 23448S310FA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS310HE-TP is determined by equivalence in the following electrical parameters: Schottky technology classification, 100 V maximum reverse voltage rating, 3 A average rectified current capacity, 850 mV maximum forward voltage at 3 A, and fast recovery speed characteristic (≤ 500ns for currents > 200mA). All substitute parts must operate across the -55°C to 150°C junction temperature range and maintain ROHS3 compliance. Surface mount mounting type and MSL 1 classification are required. Package variations (SOD-123HE, SOD-123FA, SOD-123W) are acceptable provided electrical specifications remain within the defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The S310FA manufactured by onsemi serves as a direct electrical equivalent to the SS310HE-TP. Both components share identical voltage ratings (100 V), current capacity (3 A), forward voltage characteristics (850 mV @ 3 A), and operating temperature range (-55°C ~ 150°C). The S310FA maintains ROHS3 compliance and MSL 1 classification, ensuring compatibility with existing supply chain requirements.

The S310FA differs from the SS310HE-TP in three measurable aspects: reverse leakage current (100 µA versus 500 µA at 100 V), junction capacitance (78pF versus 110pF at 4V, 1MHz), and package designation (SOD-123FA versus SOD-123HE). These differences represent improved performance characteristics in the substitute part. The S310FA carries AEC-Q101 automotive qualification and is designated as "Not For New Designs," indicating mature product status with established supply availability.

Selection of the S310FA is appropriate for applications requiring direct replacement of the obsolete SS310HE-TP where the improved leakage current and reduced capacitance characteristics are compatible with circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the S310FA directly replace the SS310HE-TP in existing designs?

A: The S310FA meets all primary electrical specifications of the SS310HE-TP: 100 V reverse voltage, 3 A current rating, 850 mV forward voltage at 3 A, and fast recovery speed. The substitute part exhibits lower reverse leakage current (100 µA versus 500 µA) and reduced capacitance (78pF versus 110pF), which represent performance improvements. Package differences (SOD-123FA versus SOD-123HE) require PCB layout verification for mechanical fit.

Q: What are the key differences between SS310HE-TP and S310FA?

A: The primary differences are reverse leakage current, junction capacitance, and package type. The S310FA provides superior leakage characteristics and lower capacitance. Both components maintain identical voltage and current ratings, forward voltage drop, and operating temperature range. The S310FA includes AEC-Q101 automotive qualification, which the SS310HE-TP does not specify.

Q: Are there packaging considerations when substituting these parts?

A: Yes. The SS310HE-TP uses SOD-123HE packaging while the S310FA uses SOD-123FA packaging. Although both are surface mount Schottky diodes in similar form factors, PCB footprint and land pattern compatibility must be verified before implementation. Consult package datasheets for precise dimensional specifications.

Q: What is the significance of the product status designations?

A: The SS310HE-TP is classified as Obsolete, indicating discontinued manufacturing and limited availability. The S310FA is designated "Not For New Designs," indicating mature product status with established supply but no active development. For new designs, alternative parts with "Active" status should be evaluated; for legacy system maintenance, the S310FA provides a viable substitute for the obsolete SS310HE-TP.

Q: Does the S310FA meet the same compliance requirements as the SS310HE-TP?

A: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification. The S310FA additionally specifies REACH Unaffected status and AEC-Q101 automotive qualification, providing enhanced compliance documentation for regulated applications.