S2AA R3G Equivalent & Substitute Parts

Part Overview

The S2AA R3G 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 R3G operates across a junction temperature range of -55°C to 150°C and complies with RoHS3 and REACH requirements. 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
Speed Classification	Standard Recovery >500ns	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the S2AA R3G is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Current Rating Considerations: The S2AA R3G is rated for 1.5 A average rectified current. Substitute parts are grouped into two categories:

Direct Equivalents (1.5 A Rating): Parts with identical 1.5 A current rating provide drop-in replacement capability without circuit re-evaluation.
Functional Substitutes (1.0 A Rating): Parts rated for 1.0 A can substitute in applications where the circuit design operates at or below 1.0 A average rectified current. These parts meet all voltage, package, and compliance requirements but operate at reduced current capacity.
Higher Current Alternatives (2.0 A Rating): Parts rated for 2.0 A provide increased current margin and can substitute in any application designed for the S2AA R3G.

Recovery Speed Classification: The S2AA R3G employs standard recovery characteristics (>500 ns). Substitute parts with fast recovery characteristics (≤500 ns) are electrically compatible and offer improved switching performance without circuit modification requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max)	trr (µs/ns)	Package	Temp Range (°C)	Product Status
S2AA R3G	Taiwan Semiconductor Corporation	50 V	1.5	1.1 V @ 1.5 A	1.5 µs	DO-214AC, SMA	-55 to 150	Discontinued
S2AA	Taiwan Semiconductor Corporation	50 V	1.5	1.1 V @ 1.5 A	1.5 µs	DO-214AC, SMA	-55 to 150	Active
CGRA4001-G	Comchip Technology	50 V	1.0	1.1 V @ 1 A	Standard >500ns	DO-214AC, SMA	-55 to 150	Active
ES1A-13-F	Diodes Incorporated	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 150	Active
ES1A-E3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 155	Active
ES1A-M3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 150	Active
ES1A-M3/61T	Vishay General Semiconductor - Diodes Division	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 150	Active
ES1AHE3_A/H	Vishay General Semiconductor - Diodes Division	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 150	Active
ES1AHE3_A/I	Vishay General Semiconductor - Diodes Division	50 V	1.0	920 mV @ 1 A	25 ns	DO-214AC, SMA	-55 to 150	Active
GS2A-LTP	Micro Commercial Co	50 V	2.0	1.1 V @ 2 A	Standard >500ns	DO-214AC, SMA	-55 to 150	Active
RS1A-13-F	Diodes Incorporated	50 V	1.0	1.3 V @ 1 A	150 ns	DO-214AC, SMA	-65 to 150	Active

Engineering Selection Recommendations

Primary Equivalent (Direct Replacement):

The S2AA (Tape & Reel packaging) from Taiwan Semiconductor Corporation is the direct parametric equivalent to the S2AA R3G. 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 in active production status, ensuring long-term availability and supply chain continuity. This part is the preferred selection for applications requiring no circuit modification.

Functional Substitutes for 1.0 A Applications:

For circuit designs operating at 1.0 A average rectified current or below, the following parts provide full functional substitution:

ES1A-13-F (Diodes Incorporated): Active status with fast recovery characteristics (25 ns) and lower forward voltage (920 mV @ 1 A). Suitable for applications prioritizing reduced power dissipation.
ES1A-E3/5AT (Vishay General Semiconductor - Diodes Division): Active status with extended junction temperature range (-55°C to 155°C). Suitable for high-temperature applications.
ES1A-M3/5AT and ES1A-M3/61T (Vishay General Semiconductor - Diodes Division): Active status with fast recovery characteristics and standard junction temperature range. Interchangeable alternatives within the ES1A product family.
ES1AHE3_A/H and ES1AHE3_A/I (Vishay General Semiconductor - Diodes Division): Automotive-grade parts with AEC-Q101 qualification. Suitable for automotive and high-reliability applications.
CGRA4001-G (Comchip Technology): Active status with standard recovery characteristics matching the S2AA R3G recovery profile. Suitable for applications requiring recovery speed consistency.
RS1A-13-F (Diodes Incorporated): Active status with extended junction temperature range (-65°C to 150°C). Suitable for low-temperature applications.

Higher Current Alternative:

The GS2A-LTP (Micro Commercial Co) is rated for 2.0 A average rectified current with standard recovery characteristics and 1.1 V forward voltage matching the S2AA R3G. This part provides increased current margin and is suitable for applications where future current requirements may exceed 1.5 A.

Compliance and Certification:

All substitute parts listed maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes. Parts designated as automotive-grade (ES1AHE3_A/H and ES1AHE3_A/I) carry AEC-Q101 qualification for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 1.0 A rated diode in place of the S2AA R3G rated for 1.5 A?

A: Yes, provided the circuit design operates at 1.0 A average rectified current or below. The 1.0 A substitute parts (ES1A-13-F, ES1A-E3/5AT, ES1A-M3/5AT, ES1A-M3/61T, ES1AHE3_A/H, ES1AHE3_A/I, CGRA4001-G, and RS1A-13-F) meet all voltage, package, and compliance requirements. Circuit operation above 1.0 A requires the direct equivalent S2AA or the higher-rated GS2A-LTP.

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

A: The S2AA R3G employs standard recovery characteristics with a reverse recovery time of 1.5 µs. Fast recovery diodes such as the ES1A series have reverse recovery times of 25 ns, enabling faster switching transitions. Fast recovery diodes are electrically compatible substitutes and offer improved switching performance without circuit modification.

Q: Are the ES1A variants (ES1A-13-F, ES1A-E3/5AT, ES1A-M3/5AT, ES1A-M3/61T) interchangeable?

A: Yes. All ES1A variants share identical electrical specifications (50 V, 1.0 A, 920 mV forward voltage, 25 ns recovery time) and DO-214AC packaging. Differences exist in packaging format (Tape & Reel versus Cut Tape) and temperature range. ES1A-E3/5AT extends to 155°C junction temperature. Selection depends on packaging requirements and operating temperature specifications.

Q: What is the significance of AEC-Q101 qualification on the ES1AHE3 parts?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. The ES1AHE3_A/H and ES1AHE3_A/I variants are suitable for automotive applications and high-reliability environments where component qualification is mandatory.

Q: Can I use the GS2A-LTP (2.0 A) in any application designed for the S2AA R3G (1.5 A)?

A: Yes. The GS2A-LTP maintains the same 50 V voltage rating, DO-214AC package, and standard recovery characteristics. The higher 2.0 A current rating provides additional margin and is fully compatible with circuits designed for 1.5 A operation.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in Tape & Reel (TR) packaging, standard for surface mount production. The ES1AHE3_A/H variant is also available in Cut Tape (CT) & Digi-Reel® format. Packaging selection depends on manufacturing process requirements and component handling procedures.

Q: How does forward voltage affect part selection?

A: The S2AA R3G has a forward voltage of 1.1 V at 1.5 A. Substitute parts rated for 1.0 A typically exhibit lower forward voltage (920 mV for ES1A series, 1.1 V for CGRA4001-G, 1.3 V for RS1A-13-F). Lower forward voltage reduces power dissipation in the diode. Circuit designs with tight voltage margin specifications should account for these differences.

Q: Is the S2AA R3G still available for procurement?

A: No. The S2AA R3G is discontinued at DiGi Electronics. The direct equivalent S2AA in Tape & Reel packaging is currently in active production and is the recommended replacement for new procurement.

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