MBR150 Equivalent & Substitute Parts

Part Overview

The MBR150 is a Schottky rectifier diode rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole axial package (DO-204AL, DO-41). This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MBR150 is manufactured by onsemi and features fast recovery characteristics suitable for rectification and switching applications requiring low forward voltage drop.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the MBR150 is determined by the following critical parameters:

Voltage Rating: The reverse voltage rating must equal or exceed 50 V to maintain circuit protection and reliability margins.

Current Rating: The average rectified current must equal or exceed 1 A to handle the intended load without thermal stress.

Package Type: Through-hole axial mounting (DO-204AL, DO-41) is required for mechanical and electrical compatibility with existing PCB layouts.

Technology: Schottky diode technology is specified to maintain the fast recovery characteristic and low forward voltage drop performance.

Operating Temperature Range: The junction temperature range must support the application's thermal environment.

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical or superior electrical specifications across all critical parameters (voltage, current, forward voltage, temperature range) and matching package configuration.

Similar Alternatives: Parts with comparable but not identical specifications, typically featuring lower voltage ratings (40 V or 45 V) or slightly different forward voltage characteristics, suitable only when circuit design permits reduced voltage margins.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ 1A	Package	Temp Range	Product Status	RoHS Status
MBR150	onsemi	50 V	1 A	750 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Obsolete	RoHS non-compliant
MBR150G	onsemi	50 V	1 A	750 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Obsolete	ROHS3 Compliant
MBR150RLG	onsemi	50 V	1 A	750 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Active	ROHS3 Compliant
1N5819G	Microchip Technology	40 V	1 A	600 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Active	Not specified
1N5819-BP	Micro Commercial Co	40 V	1 A	600 mV	DO-204AL, DO-41, Axial	-55°C ~ 125°C	Active	Not specified
1N5819-AP	Micro Commercial Co	40 V	1 A	600 mV	DO-204AL, DO-41, Axial	-55°C ~ 125°C	Active	Not specified
MSG145	Microsemi Corporation	45 V	1 A	580 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Active	RoHS non-compliant
SB140-E3/53	Vishay General Semiconductor	40 V	1 A	480 mV	DO-204AL, DO-41, Axial	-65°C ~ 125°C	Active	ROHS3 Compliant
SB140-E3/54	Vishay General Semiconductor	40 V	1 A	480 mV	DO-204AL, DO-41, Axial	-65°C ~ 125°C	Active	ROHS3 Compliant
SB150-E3/54	Vishay General Semiconductor	50 V	1 A	650 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Active	ROHS3 Compliant
SB150-E3/73	Vishay General Semiconductor	50 V	1 A	650 mV	DO-204AL, DO-41, Axial	-65°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Preferred Selection)

MBR150RLG is the primary recommended substitute. This part maintains identical electrical specifications to the MBR150 (50 V, 1 A, 750 mV forward voltage) while offering active product status and ROHS3 compliance. The part is available in cut tape packaging and represents the most direct replacement path.

MBR150G provides identical electrical performance to the MBR150 with ROHS3 compliance. However, this part carries obsolete product status, limiting its long-term availability. Selection of MBR150G is appropriate only when MBR150RLG is unavailable.

SB150-E3/54 and SB150-E3/73 are Vishay equivalents with matching 50 V reverse voltage and 1 A current ratings. These parts feature slightly lower forward voltage (650 mV versus 750 mV), active product status, and ROHS3 compliance. Both parts support the full -65°C to 150°C temperature range. These parts are suitable for direct replacement with the advantage of improved forward voltage characteristics.

Alternative Selections (Lower Voltage Ratings)

1N5819G, 1N5819-BP, and 1N5819-AP feature 40 V reverse voltage ratings, representing a 10 V reduction from the MBR150 specification. These parts are suitable only in applications where the circuit design permits operation at 40 V maximum reverse voltage. All three maintain 1 A current rating and fast recovery characteristics. The 1N5819G offers the widest temperature range (-65°C to 150°C) among the 1N5819 variants.

SB140-E3/53 and SB140-E3/54 are 40 V rated alternatives from Vishay with superior forward voltage performance (480 mV). These parts are appropriate only when circuit design accommodates the reduced voltage margin.

MSG145 provides an intermediate 45 V rating with low forward voltage (580 mV) and active product status. This part is suitable for applications requiring voltage ratings between 40 V and 50 V. However, RoHS non-compliance may restrict use in regulated industries.

Compliance Considerations

For applications requiring ROHS3 compliance, MBR150RLG, SB150-E3/54, and SB150-E3/73 are the only options maintaining full 50 V specifications. The 40 V alternatives (SB140-E3/53, SB140-E3/54) also provide ROHS3 compliance if voltage derating is acceptable.

For applications with no RoHS requirement, all listed parts are electrically compatible based on voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can I use a 40 V rated diode (1N5819G, SB140-E3/54) in place of the MBR150?

A: A 40 V rated diode can be used only if the circuit design ensures that the reverse voltage across the diode never exceeds 40 V under normal or fault conditions. The MBR150 is rated for 50 V, providing a 10 V safety margin. Using a 40 V part eliminates this margin and increases failure risk in overvoltage conditions. Verify circuit design limits before substitution.

Q: What is the difference between MBR150G and MBR150RLG?

A: Both parts are onsemi Schottky diodes with identical electrical specifications (50 V, 1 A, 750 mV forward voltage). The primary difference is product status: MBR150RLG is active and available in cut tape packaging, while MBR150G is obsolete. MBR150RLG is the preferred choice for new designs and ongoing procurement.

Q: Are SB150-E3/54 and SB150-E3/73 interchangeable?

A: Yes. Both Vishay parts have identical electrical specifications (50 V, 1 A, 650 mV forward voltage, -65°C to 150°C temperature range) and package configuration (DO-204AL, DO-41, Axial). The part numbers differ only in packaging tape configuration. Selection between them depends on procurement and assembly requirements.

Q: Why do some substitute parts have lower forward voltage than the MBR150?

A: Forward voltage variation is a normal characteristic of Schottky diodes and depends on semiconductor material and junction design. Lower forward voltage (such as 480 mV in SB140 series versus 750 mV in MBR150) represents improved efficiency and reduced power dissipation. This is a beneficial characteristic and does not indicate incompatibility.

Q: Can I use the 1N5819-AP or 1N5819-BP interchangeably?

A: Yes. Both Micro Commercial Co parts have identical electrical specifications (40 V, 1 A, 600 mV forward voltage, -55°C to 125°C temperature range) and package configuration. The part numbers differ only in packaging format (bulk). Selection depends on assembly and procurement requirements.

Q: What is the temperature range difference between MBR150 and 1N5819 variants?

A: The MBR150 operates from -65°C to 150°C junction temperature. The 1N5819-AP and 1N5819-BP variants operate from -55°C to 125°C, representing a narrower range. The 1N5819G extends to -65°C to 150°C, matching the MBR150 range. For applications requiring full -65°C to 150°C operation, use 1N5819G or maintain the 50 V rated alternatives.

Q: Is the MBR150 still available for new designs?

A: The MBR150 is classified as obsolete. For new designs, use MBR150RLG (active status, identical specifications, ROHS3 compliant) or SB150-E3/54 and SB150-E3/73 (active status, matching voltage and current ratings, improved forward voltage performance, ROHS3 compliant).

Q: What does "Fast Recovery ≤ 500 ns" mean for my application?

A: Fast recovery time indicates the diode switches off quickly when reverse biased, making it suitable for high-frequency rectification and switching applications. All listed substitute parts maintain this fast recovery characteristic, ensuring compatibility with applications requiring rapid diode switching.

Q: Are all substitute parts available in the same axial package?

A: Yes. All listed substitute parts are available in DO-204AL, DO-41, or axial package configurations, ensuring mechanical compatibility with existing PCB layouts designed for the MBR150.

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