S2GA R3G Equivalent & Substitute Parts

Part Overview

The S2GA R3G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 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 requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with minor parameter variations acceptable for the application.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	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 @ 400 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S2GA R3G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a maximum DC reverse voltage (Vr) of 400 V or greater to ensure equivalent or superior voltage withstand capability.

Current Rating: The primary distinction between equivalent and substitute parts is the average rectified current (Io). The S2GA R3G is rated for 1.5 A. Parts rated at 1.5 A are parametric equivalents; parts rated at 1 A or 2 A are functional substitutes with reduced or increased current capacity.

Package and Mounting: All listed parts use surface mount technology in DO-214AC (SMA) or compatible packages (DO-214AA for SMB variants), ensuring mechanical and thermal compatibility with existing PCB layouts.

Recovery Characteristics: The S2GA R3G exhibits standard recovery with a reverse recovery time (trr) of 1.5 µs. Substitute parts with faster recovery (trr ≤ 500 ns) or standard recovery characteristics are functionally compatible.

Forward Voltage: Forward voltage drop varies between 1.0 V and 1.3 V across the substitute range at their respective rated currents. This parameter affects power dissipation and thermal performance.

Temperature Range: All parts operate across -55°C to -65°C minimum and 150°C maximum, with most supporting the full industrial temperature range.

Compliance: All parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity, ensuring regulatory and environmental compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	Product Status	Packaging Type
S2GA R3G	Taiwan Semiconductor Corporation	400	1.5	1.1 @ 1.5 A	1.5 µs	DO-214AC (SMA)	Discontinued	Cut Tape (CT) & Digi-Reel®
S2GA	Taiwan Semiconductor Corporation	400	1.5	1.1 @ 1.5 A	1.5 µs	DO-214AC (SMA)	Active	Tape & Reel (TR)
CGRA4004-G	Comchip Technology	400	1.0	1.1 @ 1 A	Standard >500ns	DO-214AC (SMA)	Active	Tape & Reel (TR)
ES1G-13-F	Diodes Incorporated	400	1.0	1.25 @ 1 A	25 ns	DO-214AC (SMA)	Active	Cut Tape (CT)
GS1G-LTP	Micro Commercial Co	400	1.0	1.0 @ 1 A	Standard >500ns	DO-214AC (SMA)	Not For New Designs	Cut Tape (CT) & Digi-Reel®
GS2G-LTP	Micro Commercial Co	400	2.0	1.1 @ 2 A	Standard >500ns	DO-214AC (SMA)	Not For New Designs	Tape & Reel (TR)
RS1G-13-F	Diodes Incorporated	400	1.0	1.3 @ 1 A	150 ns	DO-214AC (SMA)	Active	Cut Tape (CT) & Digi-Reel®
RS1GB-13-F	Diodes Incorporated	400	1.0	1.3 @ 1 A	150 ns	DO-214AA (SMB)	Active	Tape & Reel (TR)
RS1GHE3_A/H	Vishay General Semiconductor - Diodes Division	400	1.0	1.3 @ 1 A	150 ns	DO-214AC (SMA)	Active	Cut Tape (CT)
RS1GHE3_A/I	Vishay General Semiconductor - Diodes Division	400	1.0	1.3 @ 1 A	150 ns	DO-214AC (SMA)	Active	Tape & Reel (TR)
S1G-13-F	Diodes Incorporated	400	1.0	1.1 @ 1 A	3 µs	DO-214AC (SMA)	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

The S2GA (Tape & Reel packaging variant) from Taiwan Semiconductor Corporation is the parametric equivalent to the S2GA R3G. This part maintains identical electrical specifications including 400 V reverse voltage, 1.5 A average rectified current, 1.1 V forward voltage drop at 1.5 A, and 1.5 µs reverse recovery time. The only difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel®). This part is currently active and available in production quantities.

Functional Substitutes with Reduced Current Rating (1.0 A):

The following parts are suitable substitutes when the application can operate at or below 1.0 A average rectified current:

CGRA4004-G (Comchip Technology) maintains standard recovery characteristics and 1.1 V forward voltage drop, providing the closest electrical match to the original part among 1 A alternatives.

ES1G-13-F (Diodes Incorporated) offers fast recovery (25 ns) with 1.25 V forward voltage drop. This part is suitable for applications requiring reduced switching losses.

S1G-13-F (Diodes Incorporated) provides standard recovery (3 µs) with 1.1 V forward voltage drop, matching the original forward voltage characteristic.

RS1G-13-F (Diodes Incorporated) and RS1GHE3_A/H, RS1GHE3_A/I (Vishay) offer fast recovery (150 ns) with 1.3 V forward voltage drop. The Vishay variants include AEC-Q101 automotive qualification.

GS1G-LTP (Micro Commercial Co) is marked "Not For New Designs" and should be avoided for new applications despite its 1.0 V forward voltage advantage.

Functional Substitute with Increased Current Rating (2.0 A):

GS2G-LTP (Micro Commercial Co) is rated for 2.0 A and maintains 400 V reverse voltage and 1.1 V forward voltage drop at 2 A. This part is marked "Not For New Designs" and should be used only when existing inventory constraints require it.

Package Consideration:

RS1GB-13-F uses DO-214AA (SMB) package instead of DO-214AC (SMA). This part is mechanically incompatible with existing SMA footprints and requires PCB redesign.

Product Status Priority:

For new designs, select from parts with "Active" product status: S2GA (TR), CGRA4004-G, ES1G-13-F, RS1G-13-F, RS1GHE3_A/H, RS1GHE3_A/I, or S1G-13-F. Avoid parts marked "Not For New Designs" (GS1G-LTP, GS2G-LTP) unless existing designs mandate their use.

Frequently Asked Questions (FAQ)

Q: Can I use a 1.0 A rated diode in place of the 1.5 A S2GA R3G?

A: Yes, provided your circuit operates at or below 1.0 A average rectified current. The 1.0 A parts listed (CGRA4004-G, ES1G-13-F, GS1G-LTP, RS1G-13-F, RS1GHE3_A/H, RS1GHE3_A/I, S1G-13-F) all maintain 400 V reverse voltage rating and are mechanically compatible. Verify your actual circuit current requirements before substitution.

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

A: Recovery speed is characterized by reverse recovery time (trr). The original S2GA R3G has standard recovery with trr of 1.5 µs. Fast recovery alternatives (ES1G-13-F with 25 ns, RS1G-13-F with 150 ns) reduce switching losses and are suitable for high-frequency applications. Standard recovery parts (CGRA4004-G, GS1G-LTP, S1G-13-F) are appropriate for line-frequency or low-frequency rectification.

Q: Why do forward voltage drops vary between 1.0 V and 1.3 V?

A: Forward voltage drop depends on semiconductor material quality, doping profile, and current rating. At the same 1.0 A test current, different manufacturers achieve different forward voltage characteristics. The original S2GA R3G specifies 1.1 V at 1.5 A. When substituting with 1.0 A parts, compare forward voltage at 1.0 A: CGRA4004-G and S1G-13-F match at 1.1 V, while RS1G-13-F and RS1GHE3 variants are 1.3 V. This affects power dissipation and thermal design.

Q: Can I use the S2GA in Tape & Reel packaging instead of Cut Tape & Digi-Reel®?

A: Yes. The S2GA (TR) is the parametric equivalent with identical electrical specifications. The packaging difference (Tape & Reel versus Cut Tape & Digi-Reel®) affects only procurement and handling. Verify your assembly equipment compatibility with Tape & Reel format before ordering.

Q: What does "Not For New Designs" mean for GS1G-LTP and GS2G-LTP?

A: This product status indicates the manufacturer is not recommending these parts for new circuit designs. These parts may have limited long-term availability or are being phased out. Use only if existing designs already incorporate them or inventory constraints require it. For new applications, select from parts with "Active" status.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original S2GA R3G compliance profile.

Q: Why is RS1GB-13-F listed if it uses a different package?

A: RS1GB-13-F uses DO-214AA (SMB) package instead of DO-214AC (SMA). While electrically equivalent to other 1.0 A alternatives, it is mechanically incompatible with existing SMA footprints. This part is included for reference only; PCB redesign is required for implementation.

Q: Which substitute offers the best thermal performance?

A: Thermal performance depends on forward voltage drop and current rating. At 1.0 A, GS1G-LTP has the lowest forward voltage (1.0 V), resulting in lowest power dissipation. However, GS1G-LTP is marked "Not For New Designs." Among active parts, CGRA4004-G and S1G-13-F both offer 1.1 V forward voltage at 1.0 A, providing good thermal characteristics.

Q: Can I use RS1GHE3_A/H or RS1GHE3_A/I for automotive applications?

A: Yes. Both RS1GHE3_A/H and RS1GHE3_A/I carry AEC-Q101 automotive qualification, making them suitable for automotive-grade applications. These parts are available in Cut Tape (CT) and Tape & Reel (TR) packaging respectively.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message