SRAS860H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SRAS860H is a 60V, 8A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in TO-263AB (D2PAK) surface mount packaging. This component is classified as an automotive-grade diode with AEC-Q101 qualification and is currently in active product status. The SRAS860H serves as a fast recovery rectifier suitable for power conversion and switching applications requiring low forward voltage drop and rapid switching characteristics.

Substitute parts are identified when equivalent electrical performance can be achieved within the same package footprint while maintaining compliance with automotive and industrial standards. The following substitute diodes share the same 60V reverse voltage rating and TO-263AB package configuration, with variations in current handling capacity and forward voltage characteristics.

Key Parameters

Parameter	SRAS860H
Voltage - DC Reverse (Vr) (Max)	60 V
Current - Average Rectified (Io)	8 A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 8 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 60 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitute parts for the SRAS860H are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Voltage - DC Reverse (Vr) (Max): 60 V (exact match required)
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (exact match required)
Mounting Type: Surface Mount (exact match required)
Technology: Schottky (exact match required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Variable Parameters (Substitution Allowed):

Current - Average Rectified (Io): 8A or higher
Voltage - Forward (Vf) (Max) @ If: May vary with current rating
Current - Reverse Leakage @ Vr: May vary within acceptable limits
Operating Temperature - Junction: May extend beyond original range
Product Status: Active or Last Time Buy acceptable

All substitute parts listed maintain identical reverse voltage rating, package configuration, and fast recovery switching characteristics. Current ratings equal to or exceeding 8A are acceptable for direct substitution. Forward voltage characteristics scale proportionally with current capacity in Schottky diode technology.

Parameter Comparison

Parameter	SRAS860H	STPS20M60SG-TR	STPS30M60SG-TR	STPS30SM60SG-TR	MBRB1660-E3/45
Manufacturer	Taiwan Semiconductor Corporation	STMicroelectronics	STMicroelectronics	STMicroelectronics	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	60 V	60 V	60 V	60 V	60 V
Current - Average Rectified (Io)	8 A	20 A	30 A	30 A	16 A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 8 A	565 mV @ 20 A	590 mV @ 30 A	615 mV @ 30 A	750 mV @ 16 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 60 V	125 µA @ 60 V	165 µA @ 60 V	135 µA @ 60 V	1 mA @ 60 V
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-55°C ~ 150°C	150°C (Max)	150°C (Max)	150°C (Max)	-65°C ~ 150°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Last Time Buy

Engineering Selection Recommendations

STPS20M60SG-TR (STMicroelectronics)

The STPS20M60SG-TR is a 20A rated Schottky diode suitable for applications requiring higher current capacity than the SRAS860H. This part maintains the 60V reverse voltage rating and TO-263AB package configuration. The forward voltage at rated current (565 mV @ 20 A) is lower than the SRAS860H, resulting in reduced power dissipation in high-current applications. Product status is Active with full RoHS3 compliance. This substitute is appropriate for designs where current headroom is required without package redesign.

STPS30M60SG-TR (STMicroelectronics)

The STPS30M60SG-TR provides 30A current capacity in the same TO-263AB package. This part is suitable for applications requiring maximum current handling within the existing footprint. Forward voltage at rated current is 590 mV @ 30 A. Product status is Active with extensive inventory availability (10,300 pcs). This substitute accommodates designs with significantly higher current demands while maintaining thermal and mechanical compatibility.

STPS30SM60SG-TR (STMicroelectronics)

The STPS30SM60SG-TR is a 30A rated variant with forward voltage of 615 mV @ 30 A. This part shares identical package and voltage specifications with STPS30M60SG-TR but exhibits slightly higher forward voltage. Product status is Active. This substitute is applicable when STPS30M60SG-TR availability is constrained.

MBRB1660-E3/45 (Vishay General Semiconductor - Diodes Division)

The MBRB1660-E3/45 is a 16A rated Schottky diode with 60V reverse voltage in TO-263AB packaging. This part is suitable for applications requiring moderate current increase over the SRAS860H. Product status is Last Time Buy, indicating this part is in end-of-life phase with limited future availability. Forward voltage at rated current is 750 mV @ 16 A. Operating temperature range extends to -65°C minimum. This substitute is applicable only when long-term availability is not a design constraint.

Selection Basis:

All substitute parts maintain 60V reverse voltage rating and TO-263AB package compatibility
All parts are Schottky technology with fast recovery characteristics
All parts are RoHS3 compliant
STMicroelectronics parts (STPS series) maintain Active product status for long-term availability
Current rating selection depends on application requirements: 20A for moderate headroom, 30A for maximum capacity
MBRB1660-E3/45 is suitable only for applications where Last Time Buy status is acceptable

Frequently Asked Questions (FAQ)

Q: Can the STPS30M60SG-TR directly replace the SRAS860H in existing PCB layouts?

A: Yes. Both parts use identical TO-263AB (D2PAK) package configuration with the same pin assignments and thermal tab placement. No PCB layout modifications are required for mechanical or electrical compatibility.

Q: What is the difference between STPS30M60SG-TR and STPS30SM60SG-TR?

A: Both parts have identical 60V reverse voltage rating, 30A current capacity, and TO-263AB package. The primary difference is forward voltage: STPS30M60SG-TR is 590 mV @ 30 A while STPS30SM60SG-TR is 615 mV @ 30 A. This results in approximately 0.75W additional power dissipation per ampere in the STPS30SM60SG-TR variant.

Q: Why is the MBRB1660-E3/45 marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this product. Existing inventory may be available, but future production is not planned. This status does not affect electrical performance but impacts long-term supply chain planning.

Q: Are all substitute parts automotive qualified?

A: The SRAS860H carries AEC-Q101 automotive qualification. The STMicroelectronics STPS series parts (STPS20M60SG-TR, STPS30M60SG-TR, STPS30SM60SG-TR) are industrial-grade Schottky diodes. The MBRB1660-E3/45 is also industrial-grade. Automotive-specific qualification status is not provided in the substitute part specifications. Applications requiring automotive qualification should confirm qualification status with the respective manufacturers.

Q: What is the thermal advantage of using a higher-rated substitute part?

A: Higher current-rated Schottky diodes typically exhibit lower forward voltage at their rated current. For example, STPS20M60SG-TR operates at 565 mV @ 20 A compared to SRAS860H at 700 mV @ 8 A. In applications operating at 8A, the STPS20M60SG-TR dissipates less power, reducing thermal load on the PCB and potentially eliminating the need for additional thermal management.

Q: Can the SRAS860H be used in place of STPS30M60SG-TR?

A: No. The SRAS860H is rated for 8A maximum average rectified current. Using it in an application designed for 30A operation would exceed the component's current rating, resulting in excessive power dissipation, thermal runaway, and potential device failure. Substitution must always be to equal or higher current capacity.

Q: What is the significance of the 60V reverse voltage rating?

A: The 60V reverse voltage rating (Vr) specifies the maximum reverse bias voltage the diode can withstand without breakdown. All listed substitute parts maintain this 60V rating, ensuring compatibility with power supply designs operating at or below 60V. This parameter is non-negotiable for substitution.

Q: Are there differences in reverse leakage current between the substitute parts?

A: Yes. SRAS860H exhibits 100 µA @ 60 V reverse leakage. STPS20M60SG-TR shows 125 µA, STPS30M60SG-TR shows 165 µA, STPS30SM60SG-TR shows 135 µA, and MBRB1660-E3/45 shows 1 mA. Higher current-rated diodes typically exhibit slightly elevated reverse leakage. For most power conversion applications, these differences are negligible. Applications with stringent leakage requirements should select parts with lower reverse leakage specifications.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. These parts do not require special moisture-controlled storage or handling procedures and can be stored under standard industrial conditions indefinitely without degradation.

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