M1MA151AT1 Equivalent & Substitute Parts

Part Overview

The M1MA151AT1 is a general-purpose rectifier diode manufactured by onsemi, rated for 40 V DC reverse voltage and 100 mA average rectified current in a surface mount SC-59 package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Active alternatives with identical or enhanced electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	100 mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 100 mA
Reverse Recovery Time (trr)	3 ns
Current - Reverse Leakage @ Vr	100 nA @ 35 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature - Junction (Max)	150°C
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the M1MA151AT1 is determined by electrical parameter compatibility within the following criteria:

Direct Electrical Equivalence: Parts must maintain minimum voltage ratings equal to or exceeding 40 V DC reverse voltage and current ratings equal to or exceeding 100 mA average rectified current. Forward voltage drop, reverse recovery time, and leakage current characteristics must remain within acceptable operational margins.

Package Compatibility: All substitute parts must utilize the TO-236-3, SC-59, or SOT-23-3 surface mount package format to ensure mechanical and thermal compatibility with existing printed circuit board layouts.

Mounting and Environmental Specifications: Surface mount technology, moisture sensitivity level, and operating temperature range must align with the original component specifications.

Substitute parts are categorized as follows:

Direct Manufacturer Equivalent: Identical electrical specifications with improved product status and compliance certifications
Similar Manufacturer Parts: Enhanced electrical ratings with compatible package formats and compliance certifications

Parameter Comparison

Parameter	M1MA151AT1 (Main)	M1MA151KT1G (Direct Equivalent)	BAL74,215 (Similar)	DAP202KT146 (Similar)
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Rohm Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	50 V	80 V
Current - Average Rectified (Io)	100 mA	100 mA	215 mA	100 mA (per Diode)
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 100 mA	1.2 V @ 100 mA	1.25 V @ 150 mA	1.2 V @ 100 mA
Reverse Recovery Time (trr)	3 ns	3 ns	4 ns	4 ns
Current - Reverse Leakage @ Vr	100 nA @ 35 V	100 nA @ 35 V	100 nA @ 50 V	100 nA @ 70 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz	2 pF @ 0 V, 1 MHz	2 pF @ 0 V, 1 MHz	Not specified
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Operating Temperature - Junction (Max)	150°C	150°C	150°C	150°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

M1MA151KT1G (Direct Equivalent - Recommended for Direct Replacement)

The M1MA151KT1G is the primary substitute for the obsolete M1MA151AT1. Both parts are manufactured by onsemi and share identical electrical specifications: 40 V DC reverse voltage, 100 mA average rectified current, 1.2 V forward voltage drop at 100 mA, and 3 ns reverse recovery time. The M1MA151KT1G maintains active product status and achieves ROHS3 compliance, addressing regulatory requirements. The primary distinction is packaging format: M1MA151KT1G is supplied in Tape & Reel format, which is standard for production environments. This part provides drop-in electrical compatibility with no circuit redesign required.

BAL74,215 (Enhanced Rating Alternative)

The BAL74,215 manufactured by Nexperia USA Inc. offers enhanced electrical ratings suitable for applications requiring design margin. This part provides 50 V DC reverse voltage (25% higher than the original specification) and 215 mA average rectified current (115% higher than the original specification). The forward voltage drop is 1.25 V at 150 mA, and reverse recovery time is 4 ns. The BAL74,215 maintains the same TO-236-3, SC-59, SOT-23-3 package format and achieves ROHS3 compliance. This part is applicable in circuits where higher voltage or current margins are beneficial.

DAP202KT146 (Diode Array Configuration)

The DAP202KT146 manufactured by Rohm Semiconductor is a diode array with 1 Pair Common Anode configuration in the same TO-236-3, SC-59, SOT-23-3 package. Each diode element is rated for 80 V DC reverse voltage and 100 mA average rectified current per diode. This part is applicable only in applications where the common anode configuration and dual-diode structure align with circuit requirements. The DAP202KT146 achieves ROHS3 compliance and is available in high inventory quantities.

All substitute parts maintain REACH Unaffected status and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can M1MA151KT1G be used as a direct replacement for M1MA151AT1?

A: Yes. The M1MA151KT1G is electrically identical to the M1MA151AT1, with matching voltage ratings (40 V), current ratings (100 mA), forward voltage drop (1.2 V @ 100 mA), and reverse recovery time (3 ns). Both parts use the same TO-236-3, SC-59, SOT-23-3 package. The primary difference is product status (active vs. obsolete) and compliance certification (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What is the difference between M1MA151KT1G and BAL74,215?

A: M1MA151KT1G and BAL74,215 differ in voltage and current ratings. M1MA151KT1G is rated for 40 V and 100 mA, while BAL74,215 is rated for 50 V and 215 mA. Both use the same package format and achieve ROHS3 compliance. BAL74,215 provides higher design margins for applications requiring enhanced ratings. Forward voltage drop differs slightly: 1.2 V for M1MA151KT1G versus 1.25 V for BAL74,215 at their respective rated currents.

Q: Is DAP202KT146 compatible with circuits designed for M1MA151AT1?

A: DAP202KT146 compatibility depends on circuit topology. DAP202KT146 is a diode array with common anode configuration, not a single diode. It is applicable only in circuits where the dual-diode structure and common anode connection are required. For single-diode applications, M1MA151KT1G or BAL74,215 are appropriate substitutes.

Q: What packaging formats are available for these substitute parts?

A: M1MA151KT1G is supplied in Tape & Reel (TR) format. BAL74,215 is supplied in Tape & Reel (TR) format. DAP202KT146 is supplied in Cut Tape (CT) and Digi-Reel® format. All parts maintain the same TO-236-3, SC-59, SOT-23-3 physical package for PCB compatibility.

Q: Are all substitute parts RoHS compliant?

A: M1MA151AT1 is RoHS non-compliant. M1MA151KT1G, BAL74,215, and DAP202KT146 are all ROHS3 compliant. For applications subject to RoHS regulations, M1MA151KT1G, BAL74,215, or DAP202KT146 must be selected.

Q: What is the reverse recovery time difference between these parts?

A: M1MA151AT1 and M1MA151KT1G both have 3 ns reverse recovery time. BAL74,215 and DAP202KT146 have 4 ns reverse recovery time. The 1 ns difference is negligible for most general-purpose rectifier applications.

Q: Can BAL74,215 be used in circuits rated for 40 V operation?

A: Yes. BAL74,215 is rated for 50 V DC reverse voltage, which exceeds the 40 V requirement. The higher voltage rating provides design margin and does not create compatibility issues in 40 V circuits. Current rating (215 mA) also exceeds the 100 mA requirement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message