MB2S45 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB2S45 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V peak reverse voltage and 500 mA average rectified current. It is packaged in TO-269AA (4-BESOP) surface mount configuration and operates across -55°C to 150°C junction temperature range. The part is currently active in production. Equivalent and substitute parts are identified based on matching electrical specifications (voltage rating, current capacity, forward voltage characteristics) and mechanical compatibility (package type, mounting method, temperature range).

Key Parameters

Parameter	MB2S45 Specification
Manufacturer	Vishay General Semiconductor - Diodes Division
Diode Type	Single Phase Bridge Rectifier
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 400 mA
Current - Reverse Leakage @ Vr	5 µA @ 200 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-269AA, 4-BESOP
Product Status	Active
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MB2S45 are classified into two categories based on electrical parameter compatibility:

Category 1: Direct Electrical Equivalents (200 V, 500 mA) These parts maintain identical voltage and current ratings, forward voltage characteristics, and reverse leakage specifications. They are mechanically compatible with TO-269AA packaging and surface mount assembly processes. Substitution within this category requires no circuit redesign.

Key matching parameters:

Voltage - Peak Reverse (Max): 200 V
Current - Average Rectified (Io): 500 mA
Voltage - Forward (Vf) (Max) @ If: 1 V @ 400 mA
Current - Reverse Leakage @ Vr: 5 µA @ 200 V
Package / Case: TO-269AA, 4-BESOP
Operating Temperature: -55°C ~ 150°C (TJ)

Category 2: Higher Voltage Rated Alternatives (400 V and above) These parts exceed the 200 V rating of the MB2S45 while maintaining 500 mA current capacity. They are electrically compatible for applications requiring the MB2S45 but offer enhanced voltage margin. These parts are suitable for designs where voltage headroom is beneficial or where supply voltage tolerance requires additional safety margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status	RoHS Status
MB2S45	Vishay General Semiconductor	200 V	500 mA	1 V @ 400 mA	5 µA @ 200 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	RoHS non-compliant
MB2S-TP	Micro Commercial Co	200 V	500 mA	1 V @ 400 mA	5 µA @ 200 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Not For New Designs	ROHS3 Compliant
MB2S	Good-Ark Semiconductor	200 V	500 mA	1 V @ 400 mA	5 µA @ 200 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	ROHS3 Compliant
MB4S	Diotec Semiconductor	400 V	500 mA	1 V @ 400 mA	5 µA @ 400 V	-50°C ~ 150°C	TO-269AA, 4-BESOP	Active	Not applicable
MB6S-TP	Micro Commercial Co	600 V	500 mA	1 V @ 400 mA	5 µA @ 600 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	ROHS3 Compliant
MB6S	MDD	600 V	500 mA	1 V @ 500 mA	5 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant
MB8S	Fairchild Semiconductor	800 V	500 mA	1 V @ 400 mA	5 µA @ 800 V	-50°C ~ 150°C	TO-269AA, 4-BESOP	Active	Not specified
MB10S-TP	Micro Commercial Co	1 kV	500 mA	1 V @ 400 mA	5 µA @ 1000 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	ROHS3 Compliant
MB10S	MDD	1 kV	1 A	1.1 V @ 400 mA	5 µA @ 1000 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	RoHS Compliant
MB1S-TP	Micro Commercial Co	100 V	500 mA	1 V @ 400 mA	5 µA @ 100 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Not For New Designs	ROHS3 Compliant
MB1S	SMC Diode Solutions	100 V	500 mA	1 V @ 500 mA	5 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (200 V, 500 mA Rating):

MB2S (Good-Ark Semiconductor) is the preferred direct substitute. It maintains all electrical specifications of the MB2S45 while offering ROHS3 compliance, addressing regulatory requirements for new designs. The part is in active production status with adequate inventory availability.

MB2S-TP (Micro Commercial Co) provides identical electrical specifications and ROHS3 compliance but carries "Not For New Designs" status, limiting its suitability for ongoing production programs.

For Higher Voltage Applications:

MB4S (Diotec Semiconductor) at 400 V rating is suitable for designs requiring voltage margin above 200 V while maintaining 500 mA current capacity and TO-269AA package compatibility. Product is active with established supply.

MB6S-TP (Micro Commercial Co) at 600 V rating provides significant voltage headroom for applications with variable or elevated supply voltages. ROHS3 compliant and actively produced.

MB8S (Fairchild Semiconductor) at 800 V rating offers maximum voltage margin within the 500 mA current class and TO-269AA package family.

MB10S-TP (Micro Commercial Co) at 1 kV rating extends voltage capability to 1000 V while maintaining 500 mA current and ROHS3 compliance.

Compliance Considerations:

The MB2S45 is RoHS non-compliant. For applications subject to RoHS regulations, MB2S, MB2S-TP, MB4S, MB6S-TP, MB6S, MB8S, MB10S-TP, and MB10S provide compliant alternatives. MB10S offers full RoHS compliance with enhanced current rating (1 A) and voltage (1 kV).

Frequently Asked Questions (FAQ)

Q: Can MB2S replace MB2S45 directly in existing designs?

A: Yes. MB2S maintains identical electrical specifications (200 V, 500 mA, 1 V forward voltage @ 400 mA, 5 µA reverse leakage @ 200 V) and package configuration (TO-269AA, 4-BESOP). No circuit modifications are required. The primary difference is ROHS3 compliance status.

Q: What is the difference between MB2S-TP and MB2S?

A: Both parts have identical electrical specifications and package type. MB2S-TP is supplied in Tape & Reel packaging format, while MB2S uses Cut Tape & Digi-Reel format. MB2S-TP carries "Not For New Designs" status. For new production programs, MB2S is recommended.

Q: Can higher voltage rated parts (MB4S, MB6S, MB8S, MB10S) be used in place of MB2S45?

A: Yes, with design consideration. Higher voltage rated bridge rectifiers are electrically compatible with lower voltage applications. They maintain the same 500 mA current rating and forward voltage characteristics. The higher voltage rating provides additional safety margin but does not affect circuit operation at 200 V or below. Package compatibility must be verified; MB6S uses 4-SMD Gull Wing package rather than TO-269AA.

Q: What is the significance of "Not For New Designs" status?

A: Parts marked "Not For New Designs" are in mature production phases with limited design support and potential supply discontinuation. For new product development, parts with "Active" status are recommended to ensure long-term availability and manufacturer support.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Most substitutes use TO-269AA or 4-BESOP package and are footprint compatible. Exception: MB6S and MB1S use 4-SMD Gull Wing package, which requires different PCB footprint. Verify package designation before substitution.

Q: What is the operating temperature difference between MB2S45 and MB4S or MB8S?

A: MB2S45, MB2S, MB2S-TP, MB6S-TP, MB10S-TP, and MB10S operate across -55°C to 150°C. MB4S and MB8S operate across -50°C to 150°C, providing 5°C less low-temperature margin. For applications requiring full -55°C operation, verify MB4S and MB8S compatibility.

Q: Does higher voltage rating affect power dissipation or thermal performance?

A: Forward voltage characteristics remain consistent across the 200 V to 1 kV voltage range (1 V @ 400 mA typical). Power dissipation at rated current is determined by forward voltage and current, not voltage rating. Thermal performance is equivalent across the product family at identical current levels.

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