MB3510 Bridge Rectifier Single Phase 1 kV 35A Equivalent & Substitute Parts

Part Overview

The MB3510 is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 1 kV peak reverse voltage and 35 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MB3510 features QC terminal mounting and operates across a temperature range of -55°C to 150°C. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating packaging and availability constraints.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	1 kV
Current - Average Rectified (Io)	35 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 17.5 A
Current - Reverse Leakage @ Vr	10 µA @ 1000 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	QC Terminal
Package / Case	4-Square, MB
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility for the MB3510 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain 1 kV peak reverse voltage rating to ensure circuit protection and reliability.

Current Rating: Substitute parts must support a minimum of 35 A average rectified current. Parts rated above this threshold (such as the BR5010-G at 50 A) are acceptable as they provide equivalent or superior current handling capacity.

Mounting Configuration: All qualified substitutes use QC terminal mounting, ensuring mechanical and electrical compatibility with existing PCB layouts and connector interfaces.

Diode Type & Technology: All substitutes are single-phase standard bridge rectifiers, maintaining functional equivalence with the original design.

Forward Voltage Characteristics: Forward voltage specifications across all substitutes remain within acceptable operating parameters for rectification applications.

Reverse Leakage: All substitutes maintain 10 µA reverse leakage at rated voltage, ensuring consistent blocking characteristics.

The three identified substitute parts meet these criteria and are grouped by manufacturer and product status.

Parameter Comparison

Parameter	MB3510 (Diodes Inc.)	BR5010-G (Comchip)	MB2510-BP (Micro Commercial)	MB3510-BP (Micro Commercial)
Voltage - Peak Reverse (Max)	1 kV	1 kV	1 kV	1 kV
Current - Average Rectified (Io)	35 A	50 A	25 A	35 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 17.5 A	1.1 V @ 25 A	1.1 V @ 12.5 A	1.1 V @ 17.5 A
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 50 V	10 µA @ 1000 V	10 µA @ 1000 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 125°C
Mounting Type	QC Terminal	QC Terminal	QC Terminal	QC Terminal
Package / Case	4-Square, MB	4-Square, BR	4-Square, MB-35	4-Square, MB-35
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified

Engineering Selection Recommendations

Primary Substitute: MB3510-BP (Micro Commercial Co)

The MB3510-BP is the direct functional equivalent, matching the original MB3510 in current rating (35 A), forward voltage characteristics at rated current (1.1 V @ 17.5 A), and reverse leakage performance (10 µA @ 1000 V). This part maintains active product status and REACH compliance. The operating temperature range is -55°C to 125°C, which is 25°C lower than the original at the upper limit. Selection of this substitute is appropriate for applications where the maximum junction temperature does not exceed 125°C.

Secondary Substitute: BR5010-G (Comchip Technology)

The BR5010-G provides superior current handling at 50 A, exceeding the 35 A requirement of the original design. This part is suitable for applications requiring current margin or where future design upgrades may increase current demands. The forward voltage is lower (1.1 V @ 25 A), providing improved efficiency. The operating temperature range is -55°C to 125°C. The reverse leakage specification is measured at 50 V rather than 1000 V, which is acceptable for rectification applications. This part is supplied in tray packaging.

Tertiary Substitute: MB2510-BP (Micro Commercial Co)

The MB2510-BP is rated for 25 A average rectified current, which is below the 35 A requirement of the original MB3510. This part is suitable only for applications where the actual circuit current demand is 25 A or less, or where the MB3510 was over-specified for the original design. This substitute should not be used as a direct replacement in circuits requiring the full 35 A capacity.

All three substitutes maintain 1 kV voltage rating, QC terminal mounting, and single-phase standard bridge rectifier topology. Selection should be based on specific application current requirements and operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can the BR5010-G (50 A) be used in place of the MB3510 (35 A)?

A: Yes. The BR5010-G exceeds the current rating of the original part and maintains all other critical electrical parameters including 1 kV voltage rating, QC terminal mounting, and reverse leakage characteristics. Higher current rating provides design margin and is electrically compatible.

Q: Is the MB2510-BP (25 A) a suitable substitute for the MB3510 (35 A)?

A: The MB2510-BP is suitable only if the actual circuit current requirement is 25 A or less. If the original design requires 35 A capacity, this part will not provide adequate current handling and should not be used.

Q: What is the impact of the lower operating temperature maximum (125°C vs. 150°C) in the BR5010-G and MB3510-BP?

A: The lower temperature maximum affects applications where junction temperature may exceed 125°C. If the design operates within -55°C to 125°C, these substitutes are fully compatible. If sustained operation above 125°C is required, the original MB3510 specification should be maintained.

Q: Are all substitutes compatible with the same PCB footprint?

A: All substitutes use QC terminal mounting and 4-square package configurations. However, package designations differ (MB, BR, MB-35). Physical dimensions and terminal spacing should be verified against the specific PCB layout before implementation.

Q: What is the significance of the reverse leakage measurement at different voltages?

A: The BR5010-G specifies reverse leakage at 50 V, while the MB3510, MB2510-BP, and MB3510-BP specify it at 1000 V. Leakage measured at higher voltage is more stringent. All parts meet the 10 µA specification at their respective measurement points and are acceptable for rectification applications.

Q: Are all substitutes RoHS compliant?

A: The BR5010-G and original MB3510 are explicitly ROHS3 compliant. RoHS status is not specified for the MB2510-BP and MB3510-BP. Compliance verification should be obtained from the manufacturer if RoHS certification is required for the application.

Q: What packaging options are available?

A: The original MB3510 is supplied in standard packaging. The BR5010-G is supplied in tray packaging. The MB2510-BP and MB3510-BP are supplied in bulk packaging. Packaging selection affects handling, storage, and procurement logistics.

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