MB4S-TP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB4S-TP is a single-phase bridge rectifier rated for 400 V peak reverse voltage with 500 mA average rectified current, manufactured by Micro Commercial Co in Surface Mount MBS-1 package. This part is classified as Not For New Designs, making identification of active equivalent and substitute components essential for ongoing production support and design alternatives.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	400 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 400 mA
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-269AA, 4-BESOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MB4S-TP is determined by the following critical parameters:

Direct Electrical Equivalents maintain identical voltage rating (400 V), current rating (500 mA), forward voltage characteristics, and reverse leakage specifications. These parts are interchangeable without circuit modification.

Similar Voltage-Rated Substitutes share the 400 V peak reverse voltage rating and 500 mA current capacity but may originate from different manufacturers or packaging formats. These are suitable where the original part is unavailable.

Lower Voltage Alternatives (200 V, 100 V ratings) are applicable only in circuits where the actual operating voltage is below the substitute's rating. These are not direct replacements but may serve in reduced-voltage applications.

Higher Voltage Alternatives (600 V rating) provide overvoltage margin and are suitable for circuits requiring enhanced voltage headroom, though they represent over-specification for 400 V applications.

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
MB4S-TP	Micro Commercial Co	400 V	500 mA	1 V @ 400 mA	5 µA @ 400 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Not For New Designs	ROHS3 Compliant
MB4S-E3/80	Vishay General Semiconductor - Diodes Division	400 V	500 mA	1 V @ 400 mA	5 µA @ 400 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	ROHS3 Compliant
B4S-E3/80	Vishay General Semiconductor - Diodes Division	400 V	500 mA	1 V @ 500 mA	5 µA @ 400 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-E3/80	Vishay General Semiconductor - Diodes Division	600 V	500 mA	1 V @ 400 mA	5 µA @ 600 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	ROHS3 Compliant
MB2S-E3/45	Vishay General Semiconductor - Diodes Division	200 V	500 mA	1 V @ 400 mA	5 µA @ 200 V	-55°C ~ 150°C	TO-269AA, 4-BESOP	Active	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

Primary Direct Equivalent: MB4S-E3/80 (Vishay) is the recommended direct replacement. It maintains identical electrical specifications, package format, and operating temperature range while offering Active product status and ROHS3 compliance. This part provides the highest compatibility with existing designs.

Alternative Direct Equivalent: B4S-E3/80 (Vishay) provides identical voltage and current ratings with Active status and ROHS3 compliance. Forward voltage specification differs slightly (1 V @ 500 mA versus 1 V @ 400 mA), representing a minor parametric variation acceptable for most applications.

Secondary Alternative: MB4S (Diotec) matches all critical electrical parameters and package specifications. Operating temperature range is -50°C to 150°C (versus -55°C to 150°C), representing a 5°C reduction at the lower bound. RoHS status is listed as Not Applicable.

Higher Voltage Option: MB6S-E3/80 (Vishay) is suitable for applications requiring voltage margin above 400 V. This part is over-specified for 400 V circuits but provides enhanced reliability in high-voltage transient environments.

Lower Voltage Alternatives: MB2S-E3/45 (200 V) and MB1S (100 V) are applicable only in circuits operating below their respective voltage ratings and should not be used as direct replacements for 400 V applications.

Frequently Asked Questions (FAQ)

Q: Can MB4S-E3/80 directly replace MB4S-TP without circuit modification?

A: Yes. MB4S-E3/80 maintains identical voltage rating (400 V), current rating (500 mA), forward voltage (1 V @ 400 mA), reverse leakage (5 µA @ 400 V), operating temperature range (-55°C to 150°C), and package format (TO-269AA, 4-BESOP). No circuit changes are required.

Q: What is the difference between B4S-E3/80 and MB4S-E3/80?

A: Both parts share 400 V voltage rating, 500 mA current rating, and TO-269AA package. The forward voltage specification for B4S-E3/80 is rated at 500 mA test current versus 400 mA for MB4S-E3/80. This represents a minor parametric difference and does not affect functional compatibility in standard applications.

Q: Can MB1S (100 V) be used in place of MB4S-TP (400 V)?

A: No. MB1S is rated for 100 V peak reverse voltage and is not suitable for 400 V applications. Using an under-rated component will result in device failure. MB1S is applicable only in circuits operating at or below 100 V.

Q: Is MB6S-E3/80 (600 V) a suitable replacement for MB4S-TP (400 V)?

A: MB6S-E3/80 is electrically compatible and maintains identical current rating and package format. The 600 V rating provides overvoltage margin. This substitution is acceptable where higher voltage headroom is beneficial or required by system design.

Q: What packaging formats are available for 400 V, 500 mA bridge rectifiers?

A: The primary packaging for these specifications is TO-269AA, 4-BESOP (Surface Mount). MB4S-E3/80, B4S-E3/80, and MB4S all use this package. Packaging variations (Cut Tape, Tape & Reel, Tube) affect supply chain and handling but do not alter electrical performance.

Q: Why is MB4S-TP marked as Not For New Designs?

A: This designation indicates the part is in mature or end-of-life status. MB4S-E3/80 from Vishay is the recommended active equivalent for new designs and ongoing production support.

Q: Are all substitute parts ROHS3 compliant?

A: MB4S-E3/80, B4S-E3/80, MB6S-E3/80, MB2S-E3/45, and MB1S are all ROHS3 compliant. MB4S (Diotec) lists RoHS status as Not Applicable. Verify RoHS compliance requirements for your specific application before selection.

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