M1MA151AT1G Equivalent & Substitute Parts

Part Overview

The M1MA151AT1G 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 active equivalent parts for ongoing design and procurement requirements. The substitute part maintains identical electrical specifications and mechanical compatibility, enabling direct replacement in existing applications.

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
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature - Junction (Max)	150°C
Mounting Type	Surface Mount
Technology	Standard

Substitute Part Grouping Explanation

The M1MA151KT1G qualifies as a direct substitute for the M1MA151AT1G based on the following criteria:

Electrical Parameter Equivalence:

Identical voltage rating: 40 V DC reverse voltage
Identical current rating: 100 mA average rectified current
Identical forward voltage: 1.2 V @ 100 mA
Identical reverse recovery time: 3 ns
Identical reverse leakage current: 100 nA @ 35 V
Identical junction capacitance: 2 pF @ 0 V, 1 MHz

Mechanical Compatibility:

Identical package designation: TO-236-3, SC-59, SOT-23-3
Identical mounting type: Surface Mount
Identical operating temperature range: 150°C maximum junction temperature

Functional Classification:

Both parts are standard technology small-signal rectifier diodes with current ratings ≤ 200 mA

The substitution is based on complete parameter alignment across all electrical and mechanical specifications provided. The primary distinction is product status and packaging format.

Parameter Comparison

Parameter	M1MA151AT1G	M1MA151KT1G
Manufacturer	onsemi	onsemi
Category	Diodes, Rectifiers	Diodes, Rectifiers
Product Status	Obsolete	Active
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io)	100 mA	100 mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 100 mA	1.2 V @ 100 mA
Reverse Recovery Time (trr)	3 ns	3 ns
Current - Reverse Leakage @ Vr	100 nA @ 35 V	100 nA @ 35 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz	2 pF @ 0 V, 1 MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount
Operating Temperature - Junction (Max)	150°C	150°C
Technology	Standard	Standard
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0070	8541.10.0070

Engineering Selection Recommendations

M1MA151KT1G is the appropriate selection for new designs and procurement activities. This part is classified as active product status, ensuring long-term availability and continued manufacturer support. The M1MA151KT1G is supplied in Tape & Reel (TR) packaging format, which is standard for automated assembly operations.

The M1MA151AT1G, classified as obsolete, should not be selected for new applications. Existing inventory of the obsolete variant may be utilized only in legacy system maintenance where component replacement is necessary.

Both parts maintain identical electrical performance and mechanical compatibility. Selection between them is determined by product lifecycle status and packaging requirements rather than functional differences.

Frequently Asked Questions (FAQ)

Q: Can M1MA151KT1G replace M1MA151AT1G in existing circuit designs?

A: Yes. The M1MA151KT1G provides complete electrical and mechanical equivalence. All voltage ratings, current ratings, forward voltage characteristics, reverse recovery time, leakage current, and junction capacitance specifications are identical. The SC-59 package footprint is unchanged.

Q: What is the difference between M1MA151AT1G and M1MA151KT1G?

A: The primary differences are product status and packaging format. M1MA151AT1G is obsolete; M1MA151KT1G is active. M1MA151AT1G uses standard packaging; M1MA151KT1G is supplied in Tape & Reel format for automated assembly. Electrical specifications are identical.

Q: Are there any compliance or certification differences?

A: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.10.0070). The M1MA151KT1G includes RoHS3 compliance certification. Both maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Is the SC-59 package footprint identical between both parts?

A: Yes. Both parts use the TO-236-3, SC-59, SOT-23-3 package designation with surface mount mounting type. PCB layout and assembly processes require no modification.

Q: What is the maximum junction temperature for both parts?

A: Both M1MA151AT1G and M1MA151KT1G are rated for 150°C maximum operating junction temperature.

Q: Are the electrical characteristics guaranteed to be identical?

A: Yes. All provided electrical parameters are identical: 40 V reverse voltage, 100 mA average rectified current, 1.2 V forward voltage @ 100 mA, 3 ns reverse recovery time, 100 nA reverse leakage @ 35 V, and 2 pF capacitance @ 0 V, 1 MHz.

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