Equivalent & Substitute Parts for 8TQ080 Schottky Diode

Part Overview

The 8TQ080 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 80 V DC reverse voltage and 8 A average rectified current in a Through Hole TO-220AC package. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 8TQ080 operates across a junction temperature range of -55°C to 175°C and exhibits fast recovery characteristics suitable for high-frequency rectification applications.

Substiute Parts

8TQ080

Vishay General Semiconductor - Diodes DivisionIn Stock: 16608TQ080 Datasheet

Current PartRFQ

DSS10-01A

IXYSIn Stock: 4191DSS10-01A Datasheet

MFR RecommendedRFQ

MBR1080F-BP

Micro Commercial CoIn Stock: 1035MBR1080F-BP Datasheet

MFR RecommendedRFQ

STPS8H100D

STMicroelectronicsIn Stock: 3200STPS8H100D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 8TQ080 are selected based on electrical and mechanical compatibility within the Schottky diode rectifier category. The primary substitution criteria are:

Electrical Compatibility:

• Voltage - DC Reverse (Vr) rating must equal or exceed 80 V
• Current - Average Rectified (Io) rating must equal or exceed 8 A
• Fast Recovery speed characteristic (≤ 500ns, > 200mA)
• Operating temperature range must accommodate -55°C to 175°C or higher

Mechanical Compatibility:

• Through Hole mounting type
• TO-220-2 or equivalent isolated tab package configuration (TO-220AC or ITO-220AC)

All substitute parts listed maintain Schottky technology and fast recovery characteristics. Substitutes may exceed the original specifications in voltage, current, or both, provided they maintain physical and thermal compatibility with the original application footprint.

Parameter Comparison

Engineering Selection Recommendations

DSS10-01A (IXYS): This substitute provides 100 V reverse voltage rating and 10 A current capacity, exceeding the 8TQ080 specifications. The DSS10-01A is Active product status with ROHS3 compliance, supporting long-term availability and regulatory requirements. The TO-220AC package maintains mechanical compatibility. Forward voltage is elevated at 840 mV @ 10 A compared to the original 720 mV @ 8 A, which may impact thermal performance in power-sensitive applications.

MBR1080F-BP (Micro Commercial Co): This substitute maintains the 80 V reverse voltage rating of the original part while providing 10 A current capacity. The ITO-220AC package features an isolated tab configuration, which may require PCB layout verification for thermal and electrical isolation requirements. Operating temperature range extends only to 150°C maximum, which is below the original 175°C specification. Active product status supports procurement continuity.

STPS8H100D (STMicroelectronics): This substitute matches the 8 A current rating of the original 8TQ080 while providing 100 V reverse voltage rating. The STPS8H100D exhibits superior reverse leakage characteristics at 4.5 µA @ 100 V, significantly lower than the original 550 µA @ 80 V. Forward voltage is optimized at 710 mV @ 8 A, closely matching the original specification. Active product status and ROHS3 compliance ensure regulatory alignment and long-term supply availability. The TO-220AC package provides direct mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the DSS10-01A replace the 8TQ080 in all applications?

A: The DSS10-01A is electrically compatible as a substitute, meeting or exceeding all critical electrical parameters. However, the elevated forward voltage (840 mV @ 10 A versus 720 mV @ 8 A) results in higher power dissipation. Thermal analysis of the specific application is required to confirm that heat dissipation remains within acceptable limits.

Q: What is the significance of the ITO-220AC package used in the MBR1080F-BP?

A: The ITO-220AC package features an isolated tab, which electrically isolates the mounting tab from the diode cathode. This differs from the standard TO-220AC package where the tab is electrically connected. PCB layout and thermal management design must account for this isolation when selecting the MBR1080F-BP as a substitute.

Q: Why does the MBR1080F-BP have a lower maximum operating temperature than the original 8TQ080?

A: The MBR1080F-BP is rated to 150°C maximum junction temperature, compared to the 8TQ080 specification of 175°C. Applications requiring sustained operation near 175°C must verify that the MBR1080F-BP thermal characteristics remain acceptable under worst-case conditions, or select an alternative substitute such as the STPS8H100D.

Q: Is the STPS8H100D the best direct replacement for the 8TQ080?

A: The STPS8H100D provides the closest electrical match to the 8TQ080, with identical 8 A current rating and superior reverse leakage performance. The forward voltage specification (710 mV @ 8 A) closely matches the original (720 mV @ 8 A), minimizing thermal design changes. Active product status and ROHS3 compliance support long-term procurement. The TO-220AC package provides direct mechanical compatibility without layout modifications.

Q: Are all substitute parts RoHS compliant?

A: The DSS10-01A and STPS8H100D are ROHS3 compliant. The MBR1080F-BP RoHS status is not specified in the provided data. Applications subject to RoHS regulatory requirements should confirm compliance status with the component supplier before final selection.

Q: What is the impact of reverse leakage current differences among the substitutes?

A: Reverse leakage current affects standby power consumption and thermal performance. The STPS8H100D exhibits significantly lower reverse leakage (4.5 µA @ 100 V) compared to the original 8TQ080 (550 µA @ 80 V), resulting in reduced standby power dissipation. The DSS10-01A (300 µA @ 100 V) and MBR1080F-BP (500 µA @ 80 V) provide intermediate leakage characteristics. Applications with stringent standby power requirements should prioritize the STPS8H100D.

Q: Can the 8TQ080 be used interchangeably with these substitutes in existing designs?

A: The 8TQ080 is Obsolete, making substitution necessary for new procurement. All listed substitutes maintain Through Hole mounting and TO-220-2 package compatibility, supporting direct PCB footprint replacement. However, electrical parameter differences, particularly forward voltage and reverse leakage, require verification that circuit performance remains within design specifications before production implementation.