SRAS20100H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SRAS20100H is an active-status Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 20 A average rectified current in a surface-mount TO-263AB (D2PAK) package. This component is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH regulations. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the original device, enabling component selection flexibility across supply chains while maintaining circuit performance requirements.

Substiute Parts

SRAS20100H

Taiwan Semiconductor CorporationIn Stock: 911SRAS20100H Datasheet

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STPS20M100SG-TR

STMicroelectronicsIn Stock: 17697STPS20M100SG-TR Datasheet

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STPS30SM100SG-TR

STMicroelectronicsIn Stock: 35386STPS30SM100SG-TR Datasheet

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STPS8H100G-TR

STMicroelectronicsIn Stock: 7061STPS8H100G-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SRAS20100H is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 100 V minimum
• Technology: Schottky
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Current Rating Consideration: Substitute parts are grouped by average rectified current (Io) capacity. Parts rated at 20 A or higher are direct substitutes. Parts rated below 20 A are downgrades and function only in applications with reduced current requirements.

Performance Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range are secondary selection criteria that influence circuit efficiency and thermal management but do not prevent substitution when primary criteria are met.

Parameter Comparison

Engineering Selection Recommendations

STPS20M100SG-TR (Direct Equivalent) This STMicroelectronics part matches the SRAS20100H in voltage rating (100 V), current capacity (20 A), package (TO-263AB D2PAK), and all compliance certifications (ROHS3, MSL 1). The forward voltage is lower (850 mV vs. 920 mV), resulting in reduced power dissipation. Operating temperature maximum is identical (150°C). This part is suitable for direct substitution in all applications where the SRAS20100H is specified.

STPS30SM100SG-TR (Higher Current Capacity) This part exceeds the current rating of the SRAS20100H (30 A vs. 20 A) while maintaining the same 100 V voltage rating and D2PAK package. All compliance requirements are met. The forward voltage at 30 A is 870 mV. This part functions as a substitute in applications operating at or below 20 A, with the advantage of additional current headroom for thermal margin. Operating temperature maximum is 150°C.

STPS8H100G-TR (Lower Current Capacity) This part is rated for 8 A average rectified current, below the 20 A specification of the SRAS20100H. It maintains the 100 V voltage rating, D2PAK package, and all compliance certifications. The forward voltage at 8 A is 710 mV, and the operating temperature maximum is 175°C. This part functions only as a substitute in applications with current requirements of 8 A or less and is not suitable for circuits designed for the full 20 A capacity of the original device.

Frequently Asked Questions (FAQ)

Q: Can STPS20M100SG-TR replace SRAS20100H in all applications? A: Yes. STPS20M100SG-TR matches the voltage rating (100 V), current capacity (20 A), package (TO-263AB D2PAK), and all compliance certifications. The lower forward voltage (850 mV vs. 920 mV) results in improved efficiency with no functional limitations.

Q: Is STPS30SM100SG-TR suitable for a 20 A circuit? A: Yes. STPS30SM100SG-TR is rated for 30 A and operates within specification at 20 A. The higher current rating provides thermal margin and is compatible with circuits designed for the SRAS20100H.

Q: Can STPS8H100G-TR be used instead of SRAS20100H? A: STPS8H100G-TR is suitable only for applications requiring 8 A or less. It cannot support the full 20 A capacity of the original device and will exceed its current rating if used in circuits designed for 20 A operation.

Q: Are all substitute parts in the same package? A: Yes. All substitute parts use the TO-263-3 D2PAK (2 Leads + Tab) surface-mount package, ensuring mechanical and thermal compatibility with the SRAS20100H footprint.

Q: Do the substitute parts meet automotive qualification requirements? A: All substitute parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating. The SRAS20100H carries AEC-Q101 automotive qualification; substitute part automotive qualification status is not provided in the available data.

Q: What is the impact of forward voltage differences on circuit performance? A: Forward voltage differences affect power dissipation and heat generation. STPS20M100SG-TR (850 mV) and STPS30SM100SG-TR (870 mV) dissipate less power than SRAS20100H (920 mV) at 20 A, improving efficiency. STPS8H100G-TR (710 mV at 8 A) operates at lower current and is not directly comparable at 20 A.

Q: Are there packaging differences between the main part and substitutes? A: The main part is supplied in Tape & Reel (TR) packaging. Substitute parts are supplied in Cut Tape (CT) & Digi-Reel® packaging. Both formats are standard surface-mount delivery methods with no functional differences in the component itself.