Equivalent & Substitute Parts for MBR1080G Schottky Diode

Part Overview

The MBR1080G is an 80V, 10A Schottky rectifier diode manufactured by onsemi in a TO-220-2 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Schottky diodes in this voltage and current class are widely used in power supply circuits, rectification applications, and switching mode power supplies where fast recovery and low forward voltage drop are critical performance factors.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	10	A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 A	mV
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100 µA @ 80 V	µA
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction	-65°C to 175°C	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the MBR1080G is determined by the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage drop (Vf), recovery speed, and package compatibility. Parts are grouped into two categories based on substitution relationship:

Parametric Equivalents maintain identical electrical specifications across all critical parameters, including reverse voltage (80V), current rating (10A), forward voltage (800 mV @ 10A), and fast recovery characteristics (≤500ns). These parts are direct functional replacements with no circuit redesign required.

Similar Substitutes share the same current rating (10A) and fast recovery speed but may differ in reverse voltage rating or forward voltage characteristics. These parts are suitable for applications where the higher voltage rating or different forward voltage drop does not create circuit incompatibility.

Parameter Comparison

Parameter	MBR1080G (onsemi)	MBR1080_T0_00001 (Panjit)	MBR1080F-BP (Micro Commercial Co)	MBR1090-M3/4W (Vishay)
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V	90 V
Current - Average Rectified (Io)	10 A	10 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 A	800 mV @ 10 A	850 mV @ 10 A	800 mV @ 10 A
Speed - Fast Recovery	≤ 500ns, > 200mA	≤ 500ns, > 200mA	≤ 500ns, > 200mA	≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	100 µA @ 80 V	50 µA @ 80 V	500 µA @ 80 V	100 µA @ 90 V
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	-65°C to 175°C	-65°C to 175°C	-50°C to 150°C	-65°C to 150°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant

Engineering Selection Recommendations

MBR1080_T0_00001 (Panjit International Inc.) is the primary parametric equivalent for direct replacement of the MBR1080G. This part maintains identical reverse voltage (80V), current rating (10A), and forward voltage (800 mV @ 10A) specifications. The operating temperature range (-65°C to 175°C) matches the original part. This part is active in production status and ROHS3 compliant. Reverse leakage current is lower (50 µA @ 80V) than the original specification, which represents improved performance characteristics. This part is supplied in tube packaging with 1,864 units in stock.

MBR1090-M3/4W (Vishay General Semiconductor - Diodes Division) is a similar substitute suitable for applications where a higher reverse voltage rating (90V) is acceptable. This part maintains the 10A current rating and 800 mV forward voltage drop. The operating temperature range extends to -65°C but is limited to 150°C maximum junction temperature, which is 25°C lower than the original part. This part is active in production status and ROHS3 compliant. This part is supplied in tube packaging with 1,114 units in stock.

MBR1080F-BP (Micro Commercial Co) is a similar substitute with identical reverse voltage (80V) and current rating (10A). Forward voltage is slightly elevated at 850 mV @ 10A compared to the 800 mV specification of the original part. Reverse leakage current is significantly higher at 500 µA @ 80V. The operating temperature range is restricted to -50°C to 150°C. The package variant is TO-220-2 with isolated tab (ITO-220AC), which may require PCB layout modification. This part is active in production status and supplied in bulk packaging with 1,020 units in stock.

Frequently Asked Questions (FAQ)

Q: Can MBR1080_T0_00001 be used as a direct replacement for MBR1080G without circuit modification?

A: Yes. MBR1080_T0_00001 maintains identical electrical specifications for reverse voltage (80V), current rating (10A), forward voltage (800 mV @ 10A), and operating temperature range (-65°C to 175°C). No circuit redesign is required for this substitution.

Q: What is the difference between the MBR1090-M3/4W and the original MBR1080G?

A: The MBR1090-M3/4W has a higher reverse voltage rating (90V versus 80V) and a lower maximum junction temperature (150°C versus 175°C). The forward voltage drop and current rating remain identical. This part is suitable for applications where the higher voltage rating does not create overvoltage conditions and where the lower temperature limit is acceptable.

Q: Why does MBR1080F-BP have higher reverse leakage current?

A: Reverse leakage current (500 µA @ 80V) is higher in the MBR1080F-BP compared to the original specification (100 µA @ 80V). This represents a different manufacturing process or die design from Micro Commercial Co. Applications sensitive to leakage current performance should use MBR1080_T0_00001 or MBR1090-M3/4W instead.

Q: Is the isolated tab variant (ITO-220AC) of MBR1080F-BP compatible with standard TO-220-2 PCB layouts?

A: The isolated tab variant requires verification of PCB pad configuration. Standard TO-220-2 layouts may require modification to accommodate the isolated tab design. Consult PCB layout documentation and component datasheet for mechanical compatibility.

Q: What is the inventory status for these substitute parts?

A: MBR1080_T0_00001 has 1,864 units in stock. MBR1090-M3/4W has 1,114 units in stock. MBR1080F-BP has 1,020 units in stock. All parts are available as new original components.

Q: Are all substitute parts RoHS3 compliant?

A: MBR1080_T0_00001 and MBR1090-M3/4W are ROHS3 compliant. MBR1080F-BP RoHS status is not specified in the provided data. Verify RoHS compliance with the supplier for MBR1080F-BP if regulatory compliance is required.

Q: What is the difference in forward voltage drop between these parts?

A: MBR1080G, MBR1080_T0_00001, and MBR1090-M3/4W all specify 800 mV @ 10A forward voltage. MBR1080F-BP specifies 850 mV @ 10A, which is 50 mV higher. This difference may affect power dissipation and thermal performance in high-current applications.

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