MB810 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB810 is a single-phase bridge rectifier rated for 1 kV peak reverse voltage with 8 A average rectified current. Manufactured by Micro Commercial Co, this component features a through-hole BR-6 package configuration and operates across a temperature range of -55°C to 125°C. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where through-hole bridge rectifiers are required.

Substiute Parts

MB810

Micro Commercial CoIn Stock: 20377MB810 Datasheet

Current PartRFQ

MB810_R1_00001

Panjit International Inc.In Stock: 1869MB810_R1_00001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB810 is constrained by the following critical parameters:

Voltage Rating: The substitute must maintain or exceed the 1 kV peak reverse voltage specification to ensure safe operation in the intended application circuit.

Current Rating: The substitute must support the 8 A average rectified current requirement without thermal or reliability degradation.

Mounting Type & Package: The original through-hole BR-6 package is a primary design constraint. Surface-mount alternatives (such as SMC/DO-214AB packages) represent functional equivalents only when circuit board redesign is acceptable.

Technology Type: The MB810 uses standard rectifier technology. Schottky diodes offer lower forward voltage drop but operate at reduced voltage ratings, making them suitable only for applications where the lower voltage ceiling is acceptable.

Temperature Range: Operating temperature compatibility must be verified for the specific application environment.

The identified substitute MB810_R1_00001 (Panjit International Inc.) is a Schottky diode in SMC package. This represents a functional alternative only for applications where: (1) the circuit can tolerate 100 V maximum reverse voltage instead of 1 kV, (2) surface-mount technology is acceptable, and (3) the lower forward voltage drop (800 mV @ 8 A) provides system benefit.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Through-Hole, 1 kV Rating):

No direct pin-compatible substitute is provided in the available data. The MB810 remains the only option for applications requiring through-hole mounting and 1 kV peak reverse voltage in the BR-6 package. Alternative sources of equivalent through-hole bridge rectifiers rated 1 kV / 8 A should be evaluated based on availability and lead time.

For Redesigned Circuits (Surface Mount, Lower Voltage):

The MB810_R1_00001 (Panjit International Inc., SMC package) is suitable only for applications where the circuit voltage does not exceed 100 V peak reverse. This substitute offers advantages including active product status, ROHS3 compliance, extended temperature range (-55°C to 150°C), and lower forward voltage drop. Circuit board redesign to accommodate SMC surface-mount technology is required.

Compliance Considerations:

The original MB810 is RoHS non-compliant. If regulatory compliance is a design requirement, the MB810_R1_00001 provides ROHS3 compliance, though voltage rating limitations must be addressed through circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can MB810_R1_00001 directly replace MB810 in my circuit?

A: No. The MB810_R1_00001 has a maximum peak reverse voltage of 100 V, compared to the MB810's 1 kV rating. Direct substitution is only possible if your circuit operates at 100 V or below. Additionally, the substitute uses surface-mount SMC packaging instead of through-hole BR-6, requiring PCB redesign.

Q: What is the primary limitation of using MB810_R1_00001 as a substitute?

A: The voltage rating is the critical limitation. The substitute is rated for 100 V maximum, making it unsuitable for applications requiring the MB810's 1 kV capability. Attempting to use it in a 1 kV circuit will result in component failure.

Q: Does the Schottky technology of MB810_R1_00001 offer any advantages?

A: Yes. Schottky diodes exhibit lower forward voltage drop (800 mV @ 8 A versus 1.1 V @ 4 A), reducing power dissipation and heat generation. This advantage applies only to applications where the 100 V voltage ceiling is acceptable.

Q: What mounting considerations apply to these parts?

A: The MB810 uses through-hole BR-6 mounting for PCB insertion. The MB810_R1_00001 uses surface-mount SMC (DO-214AB) technology, requiring different PCB layout, soldering processes, and assembly equipment. Mechanical compatibility cannot be assumed.

Q: Is the MB810_R1_00001 currently available?

A: Yes. The MB810_R1_00001 is classified as active product status with 1761 units in stock. The original MB810 is obsolete. For new designs, the active substitute should be prioritized if voltage and package requirements permit.

Q: How do the temperature ranges compare?

A: The MB810 operates from -55°C to 125°C junction temperature. The MB810_R1_00001 extends the upper limit to 150°C, providing a 25°C margin for high-temperature applications. Both support the same lower temperature limit.