VS-8TQ080PBF Schottky Diode Equivalent & Substitute Parts

Part Overview

The VS-8TQ080PBF 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 discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute parts must maintain electrical performance within the specified application parameters while meeting RoHS3 compliance and thermal operating requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 8 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	550	µA @ 80 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the VS-8TQ080PBF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Minimum 80 V
Current - Average Rectified (Io): Minimum 8 A
Technology: Schottky (fast recovery rectifier)
Mounting Type: Through Hole
Package / Case: TO-220-2 or equivalent isolated variant
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Factors:

Operating Temperature - Junction: Minimum -55°C to 175°C range
RoHS3 Compliance: Required for regulatory alignment
Forward Voltage (Vf): Acceptable within ±150 mV variance at rated current

Parts meeting or exceeding these parameters are classified as direct substitutes. Parts with higher voltage ratings or current ratings remain compatible provided all other electrical characteristics align with application requirements.

Parameter Comparison

Parameter	VS-8TQ080PBF	VS-8TQ080-M3	MBR1080F-BP	STPS8H100D
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Micro Commercial Co	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V	100 V
Current - Average Rectified (Io)	8 A	8 A	10 A	8 A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 8 A	880 mV @ 16 A	850 mV @ 10 A	710 mV @ 8 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	550 µA @ 80 V	550 µA @ 80 V	500 µA @ 80 V	4.5 µA @ 100 V
Capacitance @ Vr, F	500 pF @ 5V, 1MHz	500 pF @ 5V, 1MHz	—	—
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2	TO-220-2 Isolated Tab	TO-220-2
Operating Temperature - Junction	-55 to 175°C	-55 to 175°C	-50 to 150°C	Max 175°C
Technology	Schottky	Schottky	Schottky	Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Inventory Availability	927 Pcs	7877 Pcs	1020 Pcs	3100 Pcs

Engineering Selection Recommendations

VS-8TQ080-M3 (Vishay General Semiconductor)

This part is the direct equivalent to the VS-8TQ080PBF, sharing identical electrical ratings and the same base product number (8TQ080). Both components are manufactured by Vishay and maintain ROHS3 compliance. The VS-8TQ080-M3 is currently in active production status with significantly higher inventory availability (7877 Pcs). The primary difference is packaging format (Tube vs. unspecified for the original part). This substitute is suitable for direct replacement in all applications where the VS-8TQ080PBF was specified.

STPS8H100D (STMicroelectronics)

This part exceeds the voltage specification of the original component (100 V vs. 80 V) while maintaining identical current rating (8 A) and forward voltage characteristics (710 mV @ 8 A). The STPS8H100D demonstrates superior reverse leakage performance (4.5 µA @ 100 V vs. 550 µA @ 80 V). ROHS3 compliance and active product status are confirmed. This substitute is applicable in applications where higher voltage margin is acceptable and reverse leakage minimization is beneficial. Operating temperature range extends to 175°C maximum.

MBR1080F-BP (Micro Commercial Co)

This part provides elevated current rating (10 A vs. 8 A) at the same 80 V voltage specification. The isolated tab variant (ITO-220AC) offers electrical isolation between the tab and the cathode lead, which may be required in specific thermal management or safety-critical applications. Forward voltage is 850 mV @ 10 A. Operating temperature range is -50 to 150°C, which is narrower than the original specification. This substitute is suitable for applications requiring higher current capacity or isolated tab configuration. RoHS status is not specified in available documentation.

Frequently Asked Questions (FAQ)

Q: Can the VS-8TQ080-M3 be used as a direct replacement for the VS-8TQ080PBF?

A: Yes. Both parts share identical electrical specifications (80 V, 8 A, Schottky technology, fast recovery speed) and the same base product number (8TQ080). Both are manufactured by Vishay and are ROHS3 compliant. The VS-8TQ080-M3 is the active production equivalent.

Q: What is the difference between the TO-220AC and ITO-220AC packages?

A: The ITO-220AC (isolated tab) variant, used in the MBR1080F-BP, provides electrical isolation between the mounting tab and the cathode terminal. The standard TO-220AC package, used in the VS-8TQ080PBF and VS-8TQ080-M3, connects the tab directly to the cathode. Selection depends on thermal management and isolation requirements of the application.

Q: Is the STPS8H100D suitable for an 80 V application?

A: Yes. The STPS8H100D is rated for 100 V maximum reverse voltage, which exceeds the 80 V requirement. This provides additional voltage margin and is compatible with 80 V applications. The higher voltage rating does not degrade performance in lower-voltage circuits.

Q: What are the thermal operating range differences between substitutes?

A: The VS-8TQ080PBF and VS-8TQ080-M3 operate from -55°C to 175°C. The STPS8H100D operates to a maximum of 175°C (minimum not specified). The MBR1080F-BP operates from -50°C to 150°C, which is narrower at the upper limit. Verify application thermal requirements before selecting the MBR1080F-BP for high-temperature environments.

Q: How do forward voltage characteristics compare across substitutes?

A: The VS-8TQ080PBF specifies 720 mV @ 8 A. The STPS8H100D matches this at 710 mV @ 8 A. The VS-8TQ080-M3 specifies 880 mV @ 16 A (different test current). The MBR1080F-BP specifies 850 mV @ 10 A. Forward voltage variance is within acceptable engineering tolerance for Schottky diodes and does not preclude substitution.

Q: What is the significance of reverse leakage current differences?

A: The VS-8TQ080PBF exhibits 550 µA reverse leakage @ 80 V. The STPS8H100D demonstrates significantly lower leakage at 4.5 µA @ 100 V. Lower reverse leakage reduces standby power dissipation and heat generation. The MBR1080F-BP shows 500 µA @ 80 V, comparable to the original. Selection depends on application sensitivity to leakage current.

Q: Are all substitutes ROHS3 compliant?

A: The VS-8TQ080-M3 and STPS8H100D are confirmed ROHS3 compliant. The MBR1080F-BP RoHS status is not specified in available documentation. Verify compliance documentation with the supplier if RoHS3 certification is a regulatory requirement.

Q: What inventory considerations apply to these substitutes?

A: The VS-8TQ080PBF has 927 Pcs available but is discontinued. The VS-8TQ080-M3 has 7877 Pcs in active production. The STPS8H100D has 3100 Pcs available. The MBR1080F-BP has 1020 Pcs available. For long-term supply assurance, the VS-8TQ080-M3 is the preferred choice due to active status and highest inventory.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message