S2AA M2G Equivalent & Substitute Parts

Part Overview

The S2AA M2G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-214AC (SMA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The S2AA M2G operates across a junction temperature range of -55°C to 150°C and complies with RoHS3 and REACH standards. Standard recovery characteristics with a reverse recovery time of 1.5 µs and forward voltage of 1.1 V at 1.5 A define its electrical performance profile.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Capacitance @ Vr, F	30	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S2AA M2G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 50 V or greater to ensure equivalent reverse bias protection.

Current Rating: The S2AA M2G is rated for 1.5 A average rectified current. Substitute parts rated at 1.5 A provide direct parametric equivalence. Parts rated at 1 A operate within reduced current capacity and are classified as similar substitutes suitable for applications not requiring the full 1.5 A rating. Parts rated at 2 A exceed the original specification and are suitable for designs with higher current margins.

Package: All substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and thermal compatibility.

Recovery Characteristics: The S2AA M2G exhibits standard recovery (>500 ns). Substitute parts with fast recovery (≤500 ns) characteristics represent improved performance alternatives with faster switching behavior.

Forward Voltage: Forward voltage specifications vary between 920 mV and 1.3 V at rated current. Lower forward voltage values indicate improved efficiency characteristics.

Temperature Range: Operating temperature ranges from -55°C to 150°C for the S2AA M2G. Substitute parts with identical or extended temperature ranges maintain thermal compatibility.

Compliance: All substitute parts are RoHS3 compliant and REACH unaffected, matching the original part's regulatory status.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Recovery Type	trr	Package	Temp Range	Product Status
S2AA M2G	Taiwan Semiconductor Corporation	50 V	1.5 A	1.1 V @ 1.5 A	Standard >500ns	1.5 µs	DO-214AC (SMA)	-55 to 150°C	Discontinued
S2AA	Taiwan Semiconductor Corporation	50 V	1.5 A	1.1 V @ 1.5 A	Standard >500ns	1.5 µs	DO-214AC (SMA)	-55 to 150°C	Active
CGRA4001-G	Comchip Technology	50 V	1 A	1.1 V @ 1 A	Standard >500ns	—	DO-214AC (SMA)	-55 to 150°C	Active
ES1A-13-F	Diodes Incorporated	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 150°C	Active
ES1A-E3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 155°C	Active
ES1A-M3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 150°C	Active
ES1A-M3/61T	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 150°C	Active
ES1AHE3_A/H	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 150°C	Active
ES1AHE3_A/I	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast ≤500ns	25 ns	DO-214AC (SMA)	-55 to 150°C	Active
GS2A-LTP	Micro Commercial Co	50 V	2 A	1.1 V @ 2 A	Standard >500ns	—	DO-214AC (SMA)	-55 to 150°C	Active
RS1A-13-F	Diodes Incorporated	50 V	1 A	1.3 V @ 1 A	Fast ≤500ns	150 ns	DO-214AC (SMA)	-65 to 150°C	Active

Engineering Selection Recommendations

Direct Parametric Equivalent:

The S2AA (Tape & Reel packaging variant) from Taiwan Semiconductor Corporation is the direct parametric equivalent to the S2AA M2G. This part maintains identical electrical specifications including 1.5 A current rating, 1.1 V forward voltage, and 1.5 µs reverse recovery time. The S2AA is currently active in production and available in inventory, making it the primary replacement for discontinued S2AA M2G applications.

1 A Rated Substitutes (Reduced Current Capacity):

Parts rated at 1 A average rectified current operate at two-thirds the original 1.5 A specification. These substitutes are suitable for applications where the circuit design does not require the full 1.5 A current capacity. This category includes:

CGRA4001-G (Comchip Technology): Maintains standard recovery characteristics and 1.1 V forward voltage matching the original part's efficiency profile.
ES1A-13-F, ES1A-E3/5AT, ES1A-M3/5AT, ES1A-M3/61T (Diodes Incorporated and Vishay): Offer fast recovery characteristics (25 ns) with reduced forward voltage (920 mV), providing improved switching performance and efficiency compared to the original part.
ES1AHE3_A/H and ES1AHE3_A/I (Vishay): Automotive-grade variants with AEC-Q101 qualification, suitable for applications requiring automotive reliability standards.
RS1A-13-F (Diodes Incorporated): Extended temperature range (-65°C to 150°C) with fast recovery characteristics and 150 ns reverse recovery time.

Higher Current Capacity Substitute:

The GS2A-LTP (Micro Commercial Co) is rated for 2 A average rectified current, exceeding the original 1.5 A specification. This part maintains standard recovery characteristics and 1.1 V forward voltage. It is suitable for designs requiring higher current margins or where future current capacity expansion is anticipated.

Compliance and Regulatory Status:

All substitute parts are RoHS3 compliant and REACH unaffected, matching the original part's regulatory requirements. Parts designated as automotive-grade (ES1AHE3_A/H, ES1AHE3_A/I) carry AEC-Q101 qualification for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A rated diode as a direct replacement for the S2AA M2G rated at 1.5 A?

A: A 1 A rated diode can be used as a substitute only if the circuit design does not require the full 1.5 A current capacity. The 1 A substitute parts operate at approximately 67% of the original current rating. Circuit analysis must confirm that peak and average current demands do not exceed 1 A. If the application requires 1.5 A operation, a 1.5 A or higher rated part is necessary.

Q: What is the difference between standard recovery and fast recovery diodes?

A: The S2AA M2G exhibits standard recovery characteristics with a reverse recovery time of 1.5 µs. Fast recovery substitutes such as the ES1A series have reverse recovery times of 25 ns, enabling faster switching transitions. Fast recovery diodes reduce switching losses and are suitable for higher frequency applications. Standard recovery diodes are appropriate for lower frequency rectification circuits where switching speed is not a limiting factor.

Q: Are the Vishay ES1A automotive-grade variants (ES1AHE3_A/H, ES1AHE3_A/I) compatible with non-automotive applications?

A: Yes. Automotive-grade parts with AEC-Q101 qualification meet or exceed the reliability and performance requirements of standard industrial-grade components. These parts can be used in non-automotive applications without restriction. The automotive qualification represents an additional quality assurance level rather than a limitation to automotive use only.

Q: What is the significance of the forward voltage difference between the original S2AA M2G (1.1 V) and the ES1A series (920 mV)?

A: The ES1A series exhibits lower forward voltage (920 mV versus 1.1 V at rated current), resulting in reduced power dissipation and improved efficiency. In a 1 A circuit, this represents approximately 180 mW lower power loss per diode. Lower forward voltage is advantageous in power-sensitive applications but does not affect functional compatibility in standard rectification circuits.

Q: Can I substitute the GS2A-LTP (2 A rated) for the S2AA M2G (1.5 A rated)?

A: Yes. The GS2A-LTP is rated for 2 A average rectified current, exceeding the original 1.5 A specification. This part maintains the same 50 V reverse voltage rating, DO-214AC package, and standard recovery characteristics. The higher current rating provides additional design margin and is suitable for applications where the S2AA M2G is specified, with no functional limitations.

Q: Are all substitute parts available in the same DO-214AC (SMA) package?

A: Yes. All substitute parts listed use the DO-214AC (SMA) surface mount package, ensuring mechanical and thermal compatibility with the original S2AA M2G. Packaging variants such as Tape & Reel (TR) or Cut Tape (CT) represent different supply formats for the same physical package and do not affect board-level compatibility.

Q: What is the temperature range difference between the S2AA M2G (-55°C to 150°C) and the ES1A-E3/5AT (-55°C to 155°C)?

A: The ES1A-E3/5AT extends the upper operating temperature limit by 5°C to 155°C. This represents a minor specification difference with no practical impact on most applications. Both parts operate across the full -55°C to 150°C range required by the original S2AA M2G specification.

Q: How do I determine which substitute part is appropriate for my application?

A: Evaluate the following criteria in order: (1) Confirm the circuit's maximum average rectified current requirement; (2) Verify the reverse voltage rating requirement does not exceed 50 V; (3) Determine if fast recovery characteristics provide performance benefits; (4) Confirm operating temperature range compatibility; (5) Verify compliance requirements (RoHS3, REACH, automotive qualification if applicable). Select the substitute part that meets all requirements with the lowest cost and highest availability.

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