S2GA Equivalent & Substitute Parts

Part Overview

The S2GA 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 component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the primary part number reaches end-of-life status, experiences supply constraints, or when design requirements permit operation within relaxed electrical parameters. The S2GA serves as a reference point for identifying compatible alternatives that maintain functional equivalence within specified electrical and mechanical tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) Maximum @ If	1.1 @ 1.5	V @ A
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 400 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 logic for the S2GA is based on the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 400 V to ensure safe operation in the intended application circuit.

Current Rating: The S2GA is rated for 1.5 A average rectified current. Substitute parts with equal or higher current ratings (1.5 A or greater) provide direct functional equivalence. Parts rated below 1.5 A (such as 1 A alternatives) operate within reduced current capacity and are classified as similar rather than parametric equivalents.

Package Type: The DO-214AC (SMA) surface mount package is the primary mechanical constraint. Substitutes must use identical or compatible package designations to ensure PCB footprint compatibility without layout modifications.

Forward Voltage (Vf): Forward voltage specifications at rated current determine power dissipation characteristics. Variations within ±0.2 V at rated current are acceptable within standard rectifier design tolerances.

Recovery Characteristics: Standard recovery (>500 ns) and fast recovery (≤500 ns) technologies are both acceptable, as the application determines which recovery speed is required. Reverse recovery time (trr) variations do not preclude substitution unless the circuit specifically requires fast recovery performance.

Temperature Range: Operating junction temperature range of -55°C to 150°C is standard across all listed parts. Extended ranges (such as -65°C) provide additional margin but do not restrict substitution.

Compliance: ROHS3 compliance and MSL 1 rating are consistent across all parts, ensuring regulatory and environmental compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io A	Vf (Max) @ If	trr µs/ns	Package	Product Status	Packaging Type
S2GA	Taiwan Semiconductor Corporation	400	1.5	1.1 @ 1.5 A	1.5 µs	DO-214AC (SMA)	Active	Tape & Reel (TR)
S2GA R3G	Taiwan Semiconductor Corporation	400	1.5	1.1 @ 1.5 A	1.5 µs	DO-214AC (SMA)	Discontinued at DiGi Electronics	Cut Tape (CT) & Digi-Reel®
GS2G-LTP	Micro Commercial Co	400	2.0	1.1 @ 2 A	>500 ns	DO-214AC (SMA)	Not For New Designs	Tape & Reel (TR)
CGRA4004-G	Comchip Technology	400	1.0	1.1 @ 1 A	>500 ns	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	>500 ns	DO-214AC (SMA)	Not For New Designs	Cut Tape (CT) & Digi-Reel®
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):

S2GA R3G is the parametric equivalent of S2GA, maintaining identical electrical specifications (400 V, 1.5 A, 1.1 V forward voltage, 1.5 µs recovery time). The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part is discontinued at DiGi Electronics and should not be selected for new designs or long-term supply requirements.

Higher Current Rating Alternative:

GS2G-LTP provides 2.0 A current capacity at 400 V with identical forward voltage characteristics (1.1 V @ 2 A). This part is rated for higher current than the S2GA and operates within the same voltage and temperature specifications. Product status is "Not For New Designs," indicating obsolescence trajectory. This part is suitable only for existing production support or legacy system maintenance.

Active Status Alternatives (1.0 A Rating):

The following parts are classified as Active and maintain 400 V reverse voltage rating with 1.0 A current capacity:

CGRA4004-G (Comchip Technology) provides standard recovery characteristics with 1.1 V forward voltage at 1 A. This part is Active status and available in Tape & Reel packaging.

ES1G-13-F (Diodes Incorporated) features fast recovery (25 ns) with 1.25 V forward voltage at 1 A. This part is Active status and available in Cut Tape packaging.

RS1G-13-F (Diodes Incorporated) features fast recovery (150 ns) with 1.3 V forward voltage at 1 A. This part is Active status with extended temperature range (-65°C to 150°C) and available in Cut Tape & Digi-Reel® packaging.

RS1GHE3_A/H and RS1GHE3_A/I (Vishay General Semiconductor - Diodes Division) are automotive-qualified parts (AEC-Q101) with fast recovery (150 ns) and 1.3 V forward voltage at 1 A. Both are Active status. RS1GHE3_A/H is available in Cut Tape; RS1GHE3_A/I is available in Tape & Reel.

S1G-13-F (Diodes Incorporated) provides standard recovery (3 µs) with 1.1 V forward voltage at 1 A. This part is Active status with extended temperature range (-65°C to 150°C) and available in Cut Tape & Digi-Reel® packaging.

Obsolete Status Parts:

GS1G-LTP (Micro Commercial Co) is marked "Not For New Designs" and should not be selected for new applications despite Active inventory availability.

Package Compatibility Note:

RS1GB-13-F uses DO-214AA (SMB) package instead of DO-214AC (SMA). This package difference requires PCB footprint modification and is not a direct mechanical substitute without layout redesign.

Frequently Asked Questions (FAQ)

Q: Can the S2GA be replaced with a 1.0 A rated diode in my application?

A: Substitution with 1.0 A rated parts (such as ES1G-13-F, RS1G-13-F, or S1G-13-F) is permissible only if your circuit design operates at or below 1.0 A average rectified current. The S2GA is rated for 1.5 A; using a lower-rated part in a 1.5 A application exceeds the component's current specification and creates reliability risk.

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

A: Standard recovery diodes (>500 ns reverse recovery time) exhibit slower switching characteristics and higher reverse recovery current. Fast recovery diodes (≤500 ns) switch more rapidly with lower reverse recovery current. Selection depends on circuit switching frequency and EMI requirements. The S2GA uses standard recovery; fast recovery alternatives (ES1G-13-F, RS1G-13-F, RS1GHE3 series) are suitable if the application tolerates or requires faster switching.

Q: Why do some substitute parts have higher forward voltage (Vf) specifications?

A: Forward voltage variation (1.0 V to 1.3 V at rated current) reflects manufacturing process differences between suppliers. Higher forward voltage increases power dissipation in the diode. Substitution is acceptable if thermal design accommodates the increased dissipation. For power-sensitive applications, select parts with lower forward voltage (GS1G-LTP at 1.0 V or S1G-13-F at 1.1 V).

Q: Can I use RS1GB-13-F (SMB package) as a substitute for S2GA (SMA package)?

A: RS1GB-13-F uses DO-214AA (SMB) package, which has different physical dimensions and PCB footprint than DO-214AC (SMA). Direct substitution without PCB layout modification is not possible. SMB packages are larger and require different land patterns. Use only if PCB redesign is acceptable.

Q: Are automotive-qualified parts (RS1GHE3 series) suitable for non-automotive applications?

A: Yes. Automotive qualification (AEC-Q101) indicates enhanced reliability testing and stricter manufacturing controls. These parts exceed standard requirements and are fully compatible with non-automotive applications. No design changes are required.

Q: What does "Not For New Designs" product status mean?

A: Parts marked "Not For New Designs" (GS2G-LTP, GS1G-LTP) are in obsolescence phase. Manufacturers continue production for existing customer support but do not recommend these parts for new product development. Avoid these parts for new designs; select Active status alternatives instead.

Q: How do I verify that a substitute part is compatible with my circuit?

A: Verify compatibility by confirming: (1) DC reverse voltage rating meets or exceeds 400 V; (2) average rectified current rating meets or exceeds your circuit's maximum current requirement; (3) forward voltage and temperature coefficient do not create unacceptable power dissipation; (4) package type matches your PCB footprint or redesign is acceptable; (5) operating temperature range encompasses your application environment.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity level?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 rating, eliminating moisture-related compatibility concerns.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, ensuring compatibility with regulatory requirements across all listed jurisdictions. No compliance verification is required when substituting between these parts.

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