MB18M-BP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB18M-BP is a single-phase bridge rectifier manufactured by Micro Commercial Co, designed for 80 V peak reverse voltage applications with 1 A average rectified current. This component uses Schottky technology and is housed in a 4-DIP (0.200", 5.08mm) through-hole package. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

MB18M-BP

Micro Commercial CoIn Stock: 1003MB18M-BP Datasheet

Current PartRFQ

DF06M

onsemiIn Stock: 24393DF06M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB18M-BP is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Single-phase bridge rectifier configuration
• Through-hole mounting type
• 4-DIP package family (allows minor pitch variations: 0.200" or 0.300")
• Peak reverse voltage rating ≥ 80 V
• Average rectified current rating ≥ 1 A
• Operating temperature range encompassing -55°C to 125°C minimum

Functional Equivalence Parameters:

• Forward voltage drop characteristics
• Reverse leakage current behavior
• RoHS3 compliance status

The DF06M qualifies as a substitute based on these criteria. While it exceeds the voltage and current specifications of the MB18M-BP, it maintains electrical compatibility within the same package family and meets all mandatory requirements.

Parameter Comparison

Engineering Selection Recommendations

DF06M as MB18M-BP Substitute:

The DF06M is electrically compatible with the MB18M-BP for applications requiring single-phase bridge rectification in the 80 V / 1 A operating range. The DF06M exceeds the voltage and current specifications, providing design margin. Both components are ROHS3 compliant and rated for the required temperature range.

Physical board layout must accommodate the 4-EDIP (0.300", 7.62mm) pitch of the DF06M, which differs from the original 4-DIP (0.200", 5.08mm) pitch. PCB footprint modification is required.

The DF06M uses standard rectifier technology rather than Schottky technology. This results in higher forward voltage drop (1.1 V vs. 850 mV) and higher reverse leakage current (5 µA vs. 500 nA). These differences must be evaluated against circuit power dissipation and leakage current requirements.

Both components are classified as obsolete. Procurement should prioritize available inventory and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can the DF06M directly replace the MB18M-BP without PCB modification?

A: No. The DF06M uses a 4-EDIP package with 0.300" (7.62mm) pin pitch, while the MB18M-BP uses 4-DIP with 0.200" (5.08mm) pitch. PCB footprint redesign is required.

Q: What is the difference between Schottky and Standard rectifier technology in this application?

A: The MB18M-BP (Schottky) has lower forward voltage drop (850 mV) and lower reverse leakage (500 nA). The DF06M (Standard) has higher forward drop (1.1 V) and higher leakage (5 µA). For low-power applications, Schottky provides better efficiency. For general-purpose rectification, Standard technology is acceptable.

Q: Are both parts suitable for the same voltage and current range?

A: The MB18M-BP is rated for 80 V / 1 A. The DF06M is rated for 600 V / 1.5 A. The DF06M exceeds the original specifications and is suitable for applications within the 80 V / 1 A range with additional design margin.

Q: What compliance certifications apply to both parts?

A: Both MB18M-BP and DF06M are ROHS3 compliant. Both are classified as obsolete products.

Q: Can I use the DF06M in a circuit designed for the MB18M-BP?

A: Electrical compatibility exists for the 80 V / 1 A operating point. Circuit performance must be re-evaluated for differences in forward voltage drop and reverse leakage. PCB layout must be modified for the different package pitch.