SA2G-M3/5AT Equivalent & Substitute Parts

Part Overview

The SA2G-M3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 400 V DC reverse voltage with 2 A average rectified current in a DO-214AC (SMA) package. The part is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary part number becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when design requirements permit operation with equivalent electrical characteristics within specified tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 2 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	3	µA @ 1000 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the SA2G-M3/5AT is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AC (SMA) surface mount
Mounting Type: Surface Mount
Operating Temperature Range: Must accommodate -55°C to 150°C junction temperature

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse recovery time (trr) and recovery speed classification
Reverse leakage current characteristics
RoHS and REACH compliance status

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents — Parts with identical or superior electrical ratings across all critical parameters. These parts maintain the same 2 A current rating and 400 V voltage specification.

Category 2: Functional Alternatives — Parts with reduced current ratings (1 A) but identical voltage specifications. These alternatives are suitable only when circuit design permits operation at lower current levels.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Speed Classification	Package	Product Status
SA2G-M3/5AT	Vishay	400	2	1.1 @ 2A	1.5 µs	Standard Recovery	DO-214AC	Active
SA2G-E3/5AT	Vishay	400	2	1.1 @ 2A	1.5 µs	Standard Recovery	DO-214AC	Active
SA2G-E3/61T	Vishay	400	2	1.1 @ 2A	1.5 µs	Standard Recovery	DO-214AC	Active
ES2G-LTP	Micro Commercial Co	400	2	1.25 @ 2A	35 ns	Fast Recovery	DO-214AC	Active
CGRA4004-G	Comchip Technology	400	1	1.1 @ 1A	—	Standard Recovery	DO-214AC	Active
CURA104-G	Comchip Technology	400	1	1.3 @ 1A	50 ns	Fast Recovery	DO-214AC	Active
ES1G	Good-Ark Semiconductor	400	1	1.3 @ 1A	35 ns	Fast Recovery	DO-214AC	Active
ES1G-13-F	Diodes Incorporated	400	1	1.25 @ 1A	25 ns	Fast Recovery	DO-214AC	Active
GF1G	onsemi	400	1	1.0 @ 1A	2 µs	Standard Recovery	DO-214AC	Not For New Designs
GS1G-LTP	Micro Commercial Co	400	1	1.0 @ 1A	—	Standard Recovery	DO-214AC	Not For New Designs
GS1GE-TP	Micro Commercial Co	400	1	1.1 @ 1A	—	Standard Recovery	DO-214AC	Not For New Designs

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for New Designs):

SA2G-E3/5AT and SA2G-E3/61T are direct parametric equivalents manufactured by Vishay. Both parts maintain identical electrical specifications to the SA2G-M3/5AT with 400 V reverse voltage, 2 A average rectified current, and standard recovery characteristics. Both are Active product status and RoHS3 compliant. These parts differ only in tape reel configuration and are suitable for direct substitution without circuit modification.

ES2G-LTP (Micro Commercial Co) provides full parametric equivalence with 400 V, 2 A ratings in DO-214AC package. This part features fast recovery characteristics (35 ns trr) compared to the standard recovery of the main part, resulting in improved switching performance. Operating temperature range extends to -65°C to 175°C. This part is Active status and RoHS3 compliant.

Functional Alternatives (Current-Limited Applications):

Parts with 1 A current ratings (CGRA4004-G, CURA104-G, ES1G, ES1G-13-F, GF1G, GS1G-LTP, GS1GE-TP) are suitable only when circuit design permits operation at reduced current levels. These parts maintain 400 V reverse voltage specification and DO-214AC package compatibility. Selection among 1 A alternatives depends on recovery speed requirements and operating temperature constraints.

CGRA4004-G and GS1GE-TP maintain standard recovery characteristics matching the main part. CURA104-G, ES1G, and ES1G-13-F provide fast recovery performance with reduced reverse recovery times (25 ns to 50 ns).

Product Status Considerations:

Parts designated "Not For New Designs" (GF1G, GS1G-LTP, GS1GE-TP) are available for existing design support and legacy applications only. New designs should prioritize Active status parts: SA2G-E3/5AT, SA2G-E3/61T, ES2G-LTP, CGRA4004-G, CURA104-G, ES1G, and ES1G-13-F.

Compliance Status:

All listed substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity level, matching the regulatory profile of the SA2G-M3/5AT.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A rated diode as a substitute for the SA2G-M3/5AT in my circuit?

A: Substitution with 1 A rated parts is permissible only if your circuit design operates at or below 1 A average rectified current. The 1 A alternatives (CGRA4004-G, CURA104-G, ES1G, ES1G-13-F, GF1G, GS1G-LTP, GS1GE-TP) maintain the 400 V reverse voltage specification and DO-214AC package compatibility. If your application requires 2 A operation, use only 2 A rated equivalents: SA2G-E3/5AT, SA2G-E3/61T, or ES2G-LTP.

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

A: Recovery speed classification refers to reverse recovery time (trr). Standard recovery parts (SA2G-M3/5AT, SA2G-E3/5AT, SA2G-E3/61T, CGRA4004-G, GF1G, GS1G-LTP, GS1GE-TP) have trr greater than 500 ns or in the microsecond range. Fast recovery parts (CURA104-G, ES1G, ES1G-13-F, ES2G-LTP) have trr of 50 ns or less. Fast recovery diodes reduce switching losses and electromagnetic interference in high-frequency applications. Selection depends on your circuit's switching frequency requirements.

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

A: Yes, all listed substitute parts are packaged in DO-214AC (SMA) surface mount configuration, ensuring mechanical and electrical compatibility with the SA2G-M3/5AT footprint. Packaging format (Tape & Reel or Cut Tape) differs among suppliers but does not affect component functionality.

Q: Which substitute parts are recommended for new circuit designs?

A: For new designs requiring 2 A operation, use SA2G-E3/5AT, SA2G-E3/61T (Vishay), or ES2G-LTP (Micro Commercial Co). All three are Active product status. For 1 A applications, use CGRA4004-G, CURA104-G, ES1G, or ES1G-13-F, all designated Active status. Avoid parts marked "Not For New Designs" (GF1G, GS1G-LTP, GS1GE-TP) in new circuit development.

Q: Do all substitute parts meet the same compliance requirements as the SA2G-M3/5AT?

A: Yes, all listed substitute parts are RoHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity level), matching the regulatory and environmental compliance profile of the SA2G-M3/5AT.

Q: What is the impact of forward voltage (Vf) differences among substitute parts?

A: Forward voltage differences affect power dissipation and heat generation. The SA2G-M3/5AT specifies 1.1 V @ 2 A. ES2G-LTP specifies 1.25 V @ 2 A, resulting in approximately 14% higher forward voltage drop. For 1 A alternatives, forward voltage ranges from 1.0 V to 1.3 V. Higher forward voltage increases power loss; lower forward voltage reduces it. Select based on your thermal design and efficiency requirements.

Q: Can I interchange parts with different operating temperature ranges?

A: Operating temperature range differences must be evaluated against your application requirements. The SA2G-M3/5AT operates from -55°C to 150°C junction temperature. ES2G-LTP extends to -65°C to 175°C, providing wider temperature coverage. GF1G and GS1G-LTP also support -65°C to 175°C. If your application operates within the narrower -55°C to 150°C range, all listed parts are suitable. If extended temperature operation is required, select parts with matching or superior temperature specifications.

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