SRAS8100H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SRAS8100H is an active-status Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 8 A average rectified current in a surface mount D2PAK (TO-263AB) package. This component is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. Substitute parts are identified to address application requirements including higher current ratings, alternative forward voltage characteristics, or different packaging availability from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	mV
Current - Reverse Leakage @ Vr	100	µA @ 100 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Operating Temperature - Junction	-55 to 150	°C
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	—
Mounting Type	Surface Mount	—
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution eligibility for the SRAS8100H is determined by the following criteria:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation Parameters:

Current - Average Rectified (Io): Equal to or greater than 8 A
Voltage - Forward (Vf) (Max) @ If: May vary based on current rating
Current - Reverse Leakage @ Vr: May vary
Operating Temperature - Junction: May vary
RoHS and REACH compliance: Must maintain or exceed current status

All identified substitute parts meet the mandatory matching parameters. Variations in current rating, forward voltage, leakage current, and junction temperature reflect manufacturer design differences while maintaining electrical and mechanical compatibility within the D2PAK package footprint.

Parameter Comparison

Parameter	SRAS8100H (Main)	STPS20M100SG-TR	STPS30SM100SG-TR	STPS8H100G-TR
Manufacturer	Taiwan Semiconductor Corporation	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	8 A	20 A	30 A	8 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 8 A	850 mV @ 20 A	870 mV @ 30 A	710 mV @ 8 A
Current - Reverse Leakage @ Vr	100 µA @ 100 V	40 µA @ 100 V	45 µA @ 100 V	4.5 µA @ 100 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55 to 150°C	150°C (Max)	150°C (Max)	175°C (Max)
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Technology	Schottky	Schottky	Schottky	Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

STPS8H100G-TR (Direct Current-Matched Substitute)

The STPS8H100G-TR from STMicroelectronics matches the SRAS8100H in voltage rating (100 V) and current rating (8 A) while maintaining identical D2PAK package geometry and surface mount configuration. This part exhibits superior electrical characteristics including lower forward voltage (710 mV vs. 950 mV at 8 A) and significantly reduced reverse leakage current (4.5 µA vs. 100 µA at 100 V). Operating temperature range extends to 175°C maximum junction temperature. Both parts maintain ROHS3 compliance and REACH unaffected status. This substitute is suitable for direct replacement in applications where the original part is unavailable.

STPS20M100SG-TR (Higher Current Capacity Substitute)

The STPS20M100SG-TR provides a 100 V rated Schottky diode with 20 A average rectified current capacity in the same D2PAK package. This part is applicable in designs requiring higher current handling than the 8 A specification of the SRAS8100H, while maintaining the same reverse voltage rating and package footprint. Forward voltage is 850 mV at 20 A. Reverse leakage current is 40 µA at 100 V. Maximum junction temperature is 150°C. ROHS3 and REACH compliance are maintained.

STPS30SM100SG-TR (Maximum Current Capacity Substitute)

The STPS30SM100SG-TR provides a 100 V rated Schottky diode with 30 A average rectified current capacity in the D2PAK package. This part accommodates applications requiring the highest current handling within the 100 V voltage class and D2PAK package constraint. Forward voltage is 870 mV at 30 A. Reverse leakage current is 45 µA at 100 V. Maximum junction temperature is 150°C. ROHS3 and REACH compliance are maintained.

All substitute parts are active-status products with confirmed inventory availability and maintain compliance with applicable environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can STPS20M100SG-TR or STPS30SM100SG-TR be used as direct replacements for SRAS8100H?

A: Yes, both parts are electrically and mechanically compatible. They share the same 100 V reverse voltage rating, D2PAK package geometry, and surface mount configuration. The higher current ratings (20 A and 30 A respectively) do not prevent substitution in circuits designed for 8 A operation. The diode will operate within its rated specifications at lower current levels.

Q: What is the primary difference between STPS8H100G-TR and SRAS8100H?

A: Both parts are rated for 100 V and 8 A with identical D2PAK packaging. The STPS8H100G-TR exhibits lower forward voltage (710 mV vs. 950 mV at 8 A) and significantly lower reverse leakage current (4.5 µA vs. 100 µA at 100 V). The STPS8H100G-TR also supports higher maximum junction temperature (175°C vs. 150°C).

Q: Are all substitute parts qualified to the same automotive standards as SRAS8100H?

A: The SRAS8100H carries AEC-Q101 qualification. The substitute parts from STMicroelectronics (STPS20M100SG-TR, STPS30SM100SG-TR, STPS8H100G-TR) are not explicitly listed with AEC-Q101 qualification in the provided specifications. Automotive application requirements must be evaluated against specific qualification documentation from STMicroelectronics.

Q: Can SRAS8100H be substituted with a lower current-rated part?

A: No. Substitute parts must maintain equal or greater current capacity than the original specification. A lower-rated part would not meet the electrical requirements of the circuit.

Q: Do all substitute parts maintain the same moisture sensitivity level?

A: Yes. All parts listed, including SRAS8100H and the three STMicroelectronics substitutes, carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage differences affect power dissipation and thermal performance. Lower forward voltage (STPS8H100G-TR at 710 mV) results in reduced power loss compared to higher forward voltage (SRAS8100H at 950 mV). Circuit thermal design and efficiency calculations must account for these differences.

Q: Are the substitute parts available in the same packaging format as SRAS8100H?

A: SRAS8100H is supplied in Tape & Reel (TR) format. STPS20M100SG-TR, STPS30SM100SG-TR, and STPS8H100G-TR are supplied in Cut Tape (CT) & Digi-Reel® format. Both formats are suitable for automated assembly processes. Reel specifications and tape dimensions should be verified with the supplier for production line compatibility.

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