MB12S-TP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB12S-TP is a single-phase Schottky bridge rectifier manufactured by Micro Commercial Co, rated for 20 V peak reverse voltage and 1 A average rectified current in a surface mount MBS-1 package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. Alternative parts must maintain electrical compatibility while meeting current design and compliance requirements.

Substiute Parts

MB12S-TP

Micro Commercial CoIn Stock: 726MB12S-TP Datasheet

Current PartRFQ

LMB12S-TP

Micro Commercial CoIn Stock: 13172LMB12S-TP Datasheet

SimilarRFQ

CDBHM220L-G

Comchip TechnologyIn Stock: 1197CDBHM220L-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MB12S-TP are qualified based on the following electrical and mechanical parameters:

Core Compatibility Criteria:

• Diode Type: Single Phase
• Technology: Schottky
• Voltage - Peak Reverse (Max): 20 V (minimum requirement)
• Current - Average Rectified (Io): ≥ 1 A
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Identified Substitute Parts:

1. LMB12S-TP (Micro Commercial Co) – Maintains identical voltage and current ratings with equivalent forward voltage characteristics. Package configuration differs (4-SMD, Gull Wing vs. TO-269AA, 4-BESOP) but both are surface mount solutions. Product status is "Not For New Designs," indicating limited availability for future applications.

2. CDBHM220L-G (Comchip Technology) – Exceeds current rating at 2 A (vs. 1 A), providing design margin. Maintains 20 V peak reverse voltage. Forward voltage specification differs (550 mV @ 2 A). Operating temperature range is -55°C ~ 125°C (vs. -55°C ~ 150°C). Product status is Active, ensuring ongoing availability. Package is TO-269AA, 4-BESOP, matching the original part footprint.

Parameter Comparison

Engineering Selection Recommendations

LMB12S-TP Selection Criteria:

• Use for direct electrical replacement where current and voltage ratings are identical to MB12S-TP
• Suitable for existing designs with established PCB layouts compatible with 4-SMD, Gull Wing package
• Product status "Not For New Designs" limits suitability for new development; consider only for maintenance or legacy system support
• ROHS3 compliance and MSL-1 rating match original part specifications

CDBHM220L-G Selection Criteria:

• Recommended for new designs requiring active product status and long-term availability
• Higher current rating (2 A) provides design margin above the 1 A requirement
• Footprint compatibility with original TO-269AA, 4-BESOP package eliminates PCB redesign
• Operating temperature range of -55°C ~ 125°C is suitable for most applications; verify if upper temperature limit of 150°C is required
• Active product status ensures supply chain continuity and manufacturing support
• ROHS3 compliance and MSL-1 rating meet regulatory requirements

Frequently Asked Questions (FAQ)

Q: Can LMB12S-TP be used as a direct replacement for MB12S-TP? A: Electrically, yes. Both parts share identical voltage (20 V) and current (1 A) ratings, forward voltage characteristics, and operating temperature range. However, the package differs (4-SMD, Gull Wing vs. TO-269AA, 4-BESOP), requiring PCB layout verification. The "Not For New Designs" status indicates limited future availability.

Q: Is CDBHM220L-G compatible with MB12S-TP applications? A: Yes, with design considerations. The 2 A current rating exceeds the 1 A requirement, providing operational margin. The 20 V peak reverse voltage matches exactly. The TO-269AA, 4-BESOP package is footprint-compatible. The operating temperature range (-55°C ~ 125°C) is narrower than the original (-55°C ~ 150°C); confirm this does not conflict with application requirements.

Q: What is the primary difference between the substitute parts? A: LMB12S-TP maintains identical electrical specifications but uses a different surface mount package. CDBHM220L-G offers higher current capacity (2 A), active product status, and identical package footprint, but has a reduced upper operating temperature limit and higher reverse leakage current.

Q: Which substitute is recommended for new product designs? A: CDBHM220L-G is recommended for new designs due to its Active product status, ensuring long-term availability and manufacturing support. The higher current rating provides design margin, and the matching package eliminates PCB redesign.

Q: Are all substitute parts ROHS3 compliant? A: Yes. MB12S-TP, LMB12S-TP, and CDBHM220L-G are all ROHS3 compliant with MSL-1 (Unlimited) moisture sensitivity rating.

Q: What is the impact of the forward voltage difference between parts? A: MB12S-TP specifies 500 mV @ 1 A, while both substitutes specify 550 mV (LMB12S-TP @ 500 mA, CDBHM220L-G @ 2 A). This 50 mV difference is within typical Schottky diode tolerance and should not impact circuit performance in standard rectification applications. Verify for applications with tight voltage regulation requirements.