MBR1050 Equivalent & Substitute Parts

Part Overview

The MBR1050 is a Schottky rectifier diode manufactured by onsemi, rated for 50 V DC reverse voltage and 10 A average rectified current in a Through Hole TO-220-2 package. This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Finding equivalent substitute parts is necessary for applications requiring continued supply, design flexibility, or alternative sourcing options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 50 V
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MBR1050 are classified based on the following substitution criteria:

Primary Substitution Parameters:

Technology: Schottky (all substitutes)
Current - Average Rectified (Io): 10 A (all substitutes)
Mounting Type: Through Hole (primary group)
Package / Case: TO-220-2 or TO-220AC compatible (primary group)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (all substitutes)
RoHS Compliance: ROHS3 Compliant (all substitutes)

Voltage Rating Considerations: Substitute parts are grouped by reverse voltage rating. Parts with equal or higher voltage ratings (45 V, 60 V, 100 V) can replace the MBR1050 in applications where the circuit design accommodates the higher rating. Parts with lower voltage ratings are not suitable substitutes.

Package Compatibility: TO-220-2 and TO-220AC packages are mechanically and electrically compatible for Through Hole mounting applications. The DSS10-01AS-TRL operates in Surface Mount (TO-263AA) and represents a different mounting category.

Parameter Comparison

Parameter	MBR1050	MBR1045G	DSS10-0045B	MBR1045-BP	MBR1060-E3/45	DSS10-01AS-TRL
Manufacturer	onsemi	onsemi	IXYS	Micro Commercial Co	Vishay	IXYS
Voltage - DC Reverse (Vr) (Max)	50 V	45 V	45 V	45 V	60 V	100 V
Current - Average Rectified (Io)	10 A	10 A	10 A	10 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 A	840 mV @ 20 A	510 mV @ 10 A	Not Specified	800 mV @ 10 A	840 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	No Recovery Time > 500mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	100 µA @ 50 V	100 µA @ 45 V	5 mA @ 45 V	100 µA @ 45 V	100 µA @ 60 V	300 µA @ 100 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2	TO-220-2	TO-263-3
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C
Product Status	Not For New Designs	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Through Hole TO-220-2 Applications (Direct Pin-Compatible Substitutes):

The MBR1045G (onsemi) is the primary recommended substitute. It maintains onsemi manufacturing continuity, carries Active product status, and extends the operating temperature range to 175°C. The 45 V rating is suitable for applications where the circuit design accommodates this lower voltage specification compared to the MBR1050's 50 V rating.

The MBR1060-E3/45 (Vishay) provides a higher 60 V reverse voltage rating, offering additional design margin. It maintains identical forward voltage characteristics (800 mV @ 10 A) and fast recovery speed specifications. This part is recommended when higher voltage headroom is required.

The MBR1045-BP (Micro Commercial Co) operates at 45 V with 10 A current rating and Active product status. It is suitable for applications where alternative sourcing from Micro Commercial Co is preferred.

The DSS10-0045B (IXYS) operates at 45 V with 10 A current rating and Active product status. This part exhibits lower forward voltage (510 mV @ 10 A) but higher reverse leakage current (5 mA @ 45 V). It is suitable when lower forward voltage drop is a design priority.

For Surface Mount Applications (Alternative Mounting Technology):

The DSS10-01AS-TRL (IXYS) is a Surface Mount variant rated for 100 V and 10 A. This part is not pin-compatible with Through Hole designs but represents an equivalent electrical specification in a different package technology (TO-263AA). It is suitable only for redesigned PCB layouts incorporating surface mount components.

Compliance and Sourcing:

All recommended Through Hole substitutes maintain ROHS3 compliance and REACH Unaffected status, matching the MBR1050's regulatory profile. All substitute parts carry Active product status, ensuring continued availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the MBR1045G directly replace the MBR1050 in my circuit?

A: The MBR1045G is pin-compatible and mechanically interchangeable in TO-220-2 Through Hole applications. The primary difference is the reverse voltage rating: 45 V versus 50 V. If your circuit operates below 45 V, substitution is valid. If your circuit requires the full 50 V rating, the MBR1060-E3/45 (60 V) is recommended instead.

Q: What is the difference between the DSS10-0045B and MBR1045G?

A: Both are 45 V, 10 A Schottky diodes in TO-220-2 packages. The DSS10-0045B (IXYS) exhibits lower forward voltage (510 mV @ 10 A) but higher reverse leakage current (5 mA @ 45 V). The MBR1045G (onsemi) maintains 840 mV forward voltage and 100 µA reverse leakage. Selection depends on whether forward voltage drop or leakage current is the critical design parameter.

Q: Why is the DSS10-01AS-TRL listed as a substitute if it uses Surface Mount packaging?

A: The DSS10-01AS-TRL is electrically equivalent (100 V, 10 A, Schottky, Fast Recovery) but requires PCB redesign for Surface Mount implementation. It is listed as an alternative for new designs or redesigned applications where Surface Mount technology is preferred or required.

Q: Can I use a 100 V rated diode (DSS10-01AS-TRL) in place of the 50 V MBR1050?

A: Yes, from an electrical standpoint. Higher voltage-rated diodes can replace lower-rated parts in applications where the circuit design accommodates the higher rating. However, the DSS10-01AS-TRL requires Surface Mount PCB layout changes and is not a direct pin-compatible replacement.

Q: What does "Not For New Designs" mean for the MBR1050?

A: This designation indicates that onsemi has discontinued active development and promotion of the MBR1050. While existing inventory may be available, new designs should incorporate active alternatives such as the MBR1045G or MBR1060-E3/45 to ensure long-term supply chain stability and access to manufacturing support.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts carry ROHS3 Compliant or equivalent regulatory status, matching the MBR1050's compliance profile. The MBR1045-BP does not specify RoHS status in the provided data; verification with the manufacturer is recommended if RoHS compliance is a mandatory requirement.

Q: What is the significance of the operating temperature range differences?

A: The MBR1050 operates from -65°C to 150°C. The MBR1045G extends the upper limit to 175°C, providing additional thermal margin for high-temperature applications. The DSS10-0045B and MBR1045-BP operate from -55°C, which may be limiting for applications requiring the full -65°C lower temperature specification.

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