MMBD1405A Equivalent & Substitute Parts

Part Overview

The MMBD1405A is a general-purpose diode array manufactured by onsemi, configured as a 1 Pair Common Anode device in a surface mount SOT-23-3 package. This component is rated for 175 V DC reverse voltage and 200 mA average rectified current per diode. The MMBD1405A is currently designated as Last Time Buy, indicating that onsemi has discontinued or will discontinue production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

MMBD1405A

onsemiIn Stock: 15329MMBD1405A Datasheet

Current PartRFQ

MMBD1405

Fairchild SemiconductorIn Stock: 6133MMBD1405 Datasheet

MFR RecommendedRFQ

BAV23A,215

Nexperia USA Inc.In Stock: 23421BAV23A,215 Datasheet

SimilarRFQ

CMPD3003A TR PBFREE

Central Semiconductor CorpIn Stock: 12514CMPD3003A TR PBFREE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMBD1405A is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Diode Configuration: 1 Pair Common Anode (pin-compatible requirement)
• Package / Case: TO-236-3, SC-59, SOT-23-3 (physical and electrical footprint)
• Mounting Type: Surface Mount (assembly compatibility)
• Technology: Standard (functional equivalence)

Electrical Performance Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 175 V
• Current - Average Rectified (Io) (per Diode): Must equal or exceed 200 mA
• Voltage - Forward (Vf) (Max) @ If: Must not significantly exceed 1.1 V @ 200 mA
• Reverse Recovery Time (trr): Must equal or be faster than 50 ns
• Operating Temperature - Junction (Max): Must equal or exceed 150°C

All substitute parts listed meet these criteria within the allowed electrical and mechanical parameters for this product category.

Parameter Comparison

Engineering Selection Recommendations

MMBD1405 (Fairchild Semiconductor) is the manufacturer-recommended substitute. This part maintains identical electrical specifications to the MMBD1405A with the exception of a higher maximum reverse voltage rating (200 V versus 175 V) and a lower forward voltage drop (1 V versus 1.1 V @ 200 mA). The MMBD1405 is in Active product status, ensuring continued availability and supply chain stability. Packaging, mounting type, and thermal specifications are identical.

BAV23A,215 (Nexperia USA Inc.) is a functionally compatible alternative. This part exceeds the MMBD1405A specifications in reverse voltage (200 V) and average rectified current (225 mA). The forward voltage is slightly elevated at 1.25 V @ 200 mA. This part is in Active product status and carries ROHS3 compliance certification. The higher current rating provides additional design margin.

CMPD3003A TR PBFREE (Central Semiconductor Corp) is a compatible substitute with a reverse voltage rating of 180 V, which exceeds the MMBD1405A requirement of 175 V. Current and thermal specifications match the original part. This part is in Active product status and carries ROHS3 compliance certification. The forward voltage specification is provided at a different test condition (1.15 V @ 300 mA).

All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original MMBD1405A.

Frequently Asked Questions (FAQ)

Q: Can the MMBD1405 (Fairchild Semiconductor) be used as a direct replacement for the MMBD1405A?

A: Yes. The MMBD1405 is electrically and mechanically compatible with the MMBD1405A. Both parts share identical diode configuration, package type, mounting method, and thermal specifications. The MMBD1405 offers equal or superior electrical performance across all specified parameters.

Q: What is the primary reason to substitute the MMBD1405A?

A: The MMBD1405A is designated as Last Time Buy by onsemi, indicating production discontinuation. Substitution ensures long-term design continuity and supply chain reliability.

Q: Are all substitute parts pin-compatible with the MMBD1405A?

A: Yes. All substitute parts listed share the identical 1 Pair Common Anode configuration in the TO-236-3, SC-59, SOT-23-3 package, ensuring direct pin compatibility.

Q: Does the higher reverse voltage rating of substitute parts affect circuit operation?

A: No. A higher maximum reverse voltage rating does not negatively affect circuit operation. The MMBD1405A is rated for 175 V maximum reverse voltage. Substitute parts rated for 180 V or 200 V provide additional voltage margin without changing functional behavior in applications operating within the original 175 V specification.

Q: Which substitute part offers the best performance margin?

A: The BAV23A,215 provides the highest performance margin with a 200 V reverse voltage rating and 225 mA average rectified current rating, both exceeding the MMBD1405A specifications. This part is suitable for applications requiring additional design headroom.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, meeting regulatory requirements equivalent to the original MMBD1405A.

Q: Can forward voltage differences between substitute parts affect circuit performance?

A: Forward voltage differences are typically negligible in most applications. The MMBD1405A specifies 1.1 V @ 200 mA. Substitute parts range from 1 V to 1.25 V at comparable test conditions. Applications sensitive to forward voltage drop should evaluate the specific substitute part datasheet for the exact test conditions and operating point.

Q: Is packaging format a consideration when selecting a substitute?

A: Packaging format (Tape & Reel versus Bulk) does not affect electrical or mechanical compatibility. Both formats contain identical components in the same physical package. Selection should be based on procurement and assembly requirements.