MMBD1401A Equivalent & Substitute Parts

Part Overview

The MMBD1401A is a general-purpose rectifier diode manufactured by onsemi, rated for 175 V DC reverse voltage and 200 mA average rectified current in a surface mount SOT-23-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MMBD1401A operates as a small-signal diode with a maximum forward voltage of 1 V at 200 mA and a reverse recovery time of 50 ns, suitable for general rectification and signal switching applications in low-power circuits.

Substiute Parts

MMBD1401A

onsemiIn Stock: 6477MMBD1401A Datasheet

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MMBD1401ALT1G

onsemiIn Stock: 6478MMBD1401ALT1G Datasheet

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BAS21-7-F

Diodes IncorporatedIn Stock: 86166BAS21-7-F Datasheet

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BAS21-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 24528BAS21-E3-08 Datasheet

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CMPD2004 TR PBFREE

Central Semiconductor CorpIn Stock: 9661CMPD2004 TR PBFREE Datasheet

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PMBD6050,215

NXP SemiconductorsIn Stock: 401162PMBD6050,215 Datasheet

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PMBD6050,235

Nexperia USA Inc.In Stock: 10970PMBD6050,235 Datasheet

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PMBD914,215

NXP SemiconductorsIn Stock: 23408PMBD914,215 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMBD1401A is determined by the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage (Vf), reverse recovery time (trr), package type, and product status. The MMBD1401A is obsolete; therefore, active product alternatives are required.

Substitute parts are grouped into two categories based on electrical compatibility:

Category 1: Direct Voltage Upgrade Substitutes (200 V and 240 V Rated) These parts maintain or exceed the 175 V reverse voltage requirement while preserving the 200 mA current rating and SOT-23-3 package form factor. Parts in this category include MMBD1401ALT1G (200 V, onsemi, active status), BAS21-7-F (200 V, Diodes Incorporated, active status), BAS21-E3-08 (200 V, Vishay, active status), and CMPD2004 TR PBFREE (240 V, Central Semiconductor, active status). These substitutes are electrically compatible with the original design while offering improved product availability through active manufacturing status.

Category 2: Lower Voltage Substitutes with Enhanced Speed (70 V and 100 V Rated) These parts operate at reduced reverse voltage ratings (70 V and 100 V) but feature fast recovery technology (4 ns trr) and higher current ratings (215 mA). Parts in this category include PMBD6050,215 (70 V, NXP, active status), PMBD6050,235 (70 V, Nexperia, active status), and PMBD914,215 (100 V, NXP, active status). These substitutes are suitable only for applications where the circuit voltage does not exceed the substitute part's reverse voltage rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

MMBD1401ALT1G is the preferred substitute when available. This part is manufactured by onsemi, the original manufacturer of the MMBD1401A, and maintains identical electrical specifications with the exception of a 25 V increase in reverse voltage rating (200 V versus 175 V). The part carries active product status, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1), ensuring long-term availability and supply chain stability.

BAS21-7-F (Diodes Incorporated) and BAS21-E3-08 (Vishay) are functionally equivalent alternatives with 200 V reverse voltage ratings. Both parts maintain the 200 mA current rating and SOT-23-3 package compatibility. Forward voltage is specified at 1.25 V maximum at 200 mA, representing a 0.25 V increase compared to the MMBD1401A. Both parts carry active product status and ROHS3 compliance.

CMPD2004 TR PBFREE (Central Semiconductor) offers the highest reverse voltage rating at 240 V, providing additional design margin for overvoltage conditions. This part maintains 200 mA current rating and SOT-23-3 package compatibility with active product status and ROHS3 compliance.

Secondary Substitutes (Application-Dependent)

PMBD6050,215 and PMBD6050,235 are suitable only for applications where the circuit reverse voltage does not exceed 70 V. These parts feature fast recovery technology (4 ns trr) and higher current ratings (215 mA). Both parts carry active product status and ROHS3 compliance.

PMBD914,215 is suitable only for applications where the circuit reverse voltage does not exceed 100 V. This part features fast recovery technology (4 ns trr) and higher current rating (215 mA) with active product status.

Frequently Asked Questions (FAQ)

Q: Can MMBD1401ALT1G be used as a direct replacement for MMBD1401A?

A: Yes. MMBD1401ALT1G is manufactured by onsemi and maintains identical electrical specifications to the MMBD1401A with the exception of reverse voltage rating (200 V versus 175 V). The higher voltage rating provides additional design margin and does not compromise circuit operation. Both parts use the SOT-23-3 package and carry ROHS3 compliance.

Q: What is the difference between the MMBD1401A and BAS21-7-F?

A: Both parts are rated for 200 mA average rectified current in SOT-23-3 packages with 200 V reverse voltage ratings. The primary difference is forward voltage specification: MMBD1401A is specified at 1.0 V maximum at 200 mA, while BAS21-7-F is specified at 1.25 V maximum at 200 mA. This 0.25 V difference may affect power dissipation in high-current applications. BAS21-7-F is manufactured by Diodes Incorporated and carries active product status.

Q: Why are PMBD6050,215 and PMBD914,215 listed as substitutes if they have lower voltage ratings?

A: These parts are listed as substitutes only for applications where the circuit reverse voltage does not exceed their respective ratings (70 V and 100 V). These parts offer fast recovery technology (4 ns trr) and higher current ratings (215 mA), making them suitable for high-speed switching applications operating at lower voltages. They are not suitable for circuits requiring the full 175 V reverse voltage capability of the MMBD1401A.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, ensuring compatibility with environmental and regulatory requirements equivalent to the original MMBD1401A.

Q: What is the moisture sensitivity level (MSL) for substitute parts?

A: All substitute parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. This matches the original MMBD1401A specification.

Q: Can CMPD2004 TR PBFREE be used in place of MMBD1401A?

A: Yes. CMPD2004 TR PBFREE is rated for 240 V reverse voltage and 200 mA average rectified current in a SOT-23-3 package. The higher voltage rating (240 V versus 175 V) provides additional design margin. Forward voltage is specified at 1.25 V maximum at 200 mA. This part carries active product status and ROHS3 compliance.

Q: What is the difference between PMBD6050,215 and PMBD6050,235?

A: Both parts are manufactured variants of the PMBD6050 with identical electrical specifications: 70 V reverse voltage, 215 mA average rectified current, 4 ns reverse recovery time, and TO-236AB package. PMBD6050,215 is supplied by NXP Semiconductors in bulk packaging, while PMBD6050,235 is supplied by Nexperia USA Inc. in tape and reel packaging. Both carry active product status and ROHS3 compliance.

Q: Is the SOT-23-3 package identical to the TO-236AB package?

A: Yes. SOT-23-3, TO-236-3, SC-59, and TO-236AB are equivalent package designations for the same three-lead surface mount component form factor. All substitute parts listed use this package type, ensuring mechanical and electrical compatibility with the original MMBD1401A footprint.