S2G General Purpose Rectifier Diode 400V 2A DO-214AA Equivalent & Substitute Parts

Part Overview

The S2G is a general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400V DC reverse voltage and 2A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The diode operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	400	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	1.15	V @ 2 A
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	1	µA @ 400 V
Capacitance @ Vr, F	30	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S2G rectifier diode is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating of 400V minimum
Current - Average Rectified (Io) rating of 2A minimum
Package / Case: DO-214AA (SMB) surface mount configuration
Mounting Type: Surface Mount
Technology: Standard recovery characteristics

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics within acceptable operating margins
Reverse recovery time (trr) and recovery speed classification
Reverse leakage current specifications
Operating temperature range compatibility
RoHS and regulatory compliance status

Parts are grouped into two categories:

Parametric Equivalents: Parts with identical or superior electrical ratings and the same package type, suitable for direct replacement without circuit redesign.

Similar Parts: Components with matching voltage and current ratings but variations in recovery characteristics, forward voltage, or leakage current specifications. These require engineering evaluation for specific application requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) V @ If	trr (µs/ns)	Ir @ Vr (µA)	Package	Product Status
S2G	Taiwan Semiconductor Corporation	400	2	1.15 @ 2A	1.5 µs	1 @ 400V	DO-214AA, SMB	Discontinued
S2G	Diotec Semiconductor	400	2	1.15 @ 2A	1.5 µs	5 @ 1700V	DO-214AA, SMB	Active
S2GH	Taiwan Semiconductor Corporation	400	2	1.15 @ 2A	1.5 µs	1 @ 400V	DO-214AA, SMB	Active
CGRB204-G	Comchip Technology	400	2	1.1 @ 2A	Standard >500ns	5 @ 400V	DO-214AA, SMB	Active
CGRB304-G	Comchip Technology	400	3	1.1 @ 3A	Standard >500ns	5 @ 400V	DO-214AA, SMB	Active
ES2G-13-F	Diodes Incorporated	400	2	1.25 @ 2A	35 ns	5 @ 400V	DO-214AA, SMB	Active
MURS140-13-F	Diodes Incorporated	400	1	1.25 @ 1A	50 ns	5 @ 400V	DO-214AA, SMB	Active
MURS140-E3/52T	Vishay General Semiconductor - Diodes Division	400	2	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA, SMB	Active
MURS140-E3/5BT	Vishay General Semiconductor - Diodes Division	400	2	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA, SMB	Active
MURS140-M3/52T	Vishay General Semiconductor - Diodes Division	400	1	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA, SMB	Active
MURS140-M3/5BT	Vishay General Semiconductor - Diodes Division	400	1	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA, SMB	Active

Engineering Selection Recommendations

Parametric Equivalent - Recommended Primary Substitutes:

The S2G manufactured by Diotec Semiconductor and the S2GH manufactured by Taiwan Semiconductor Corporation are parametric equivalents with identical electrical specifications to the original S2G. The S2GH variant includes AEC-Q101 automotive qualification and is available in Tape & Reel packaging with active product status. Both maintain the 400V reverse voltage rating, 2A average rectified current, 1.15V forward voltage at 2A, and 1.5µs reverse recovery time. The S2GH is the preferred selection for applications requiring automotive-grade reliability and long-term availability.

Similar Parts - Application-Dependent Selection:

CGRB204-G (Comchip Technology) provides a 400V/2A rating with marginally lower forward voltage (1.1V @ 2A) and active product status. This part is suitable for applications where reduced forward voltage drop is beneficial.

CGRB304-G (Comchip Technology) offers 400V/3A rating, providing current margin above the 2A requirement. This part is applicable in designs where higher current capacity provides design margin.

ES2G-13-F (Diodes Incorporated) operates at 400V/2A with fast recovery characteristics (35ns trr) and higher forward voltage (1.25V @ 2A). This part is suitable for high-frequency switching applications where fast recovery time is required.

MURS140-E3/5BT and MURS140-E3/52T (Vishay) provide 400V/2A ratings with fast recovery (75ns trr) and extended temperature range (-65°C to 175°C). These parts are applicable in temperature-critical applications.

MURS140-13-F, MURS140-M3/52T, and MURS140-M3/5BT (Vishay and Diodes Incorporated) are rated for 400V/1A and are not suitable as direct replacements for 2A applications.

All recommended substitutes maintain ROHS3 compliance and DO-214AA (SMB) package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the S2GH be used as a direct replacement for the discontinued S2G?

A: Yes. The S2GH manufactured by Taiwan Semiconductor Corporation is a parametric equivalent with identical electrical specifications: 400V reverse voltage, 2A average rectified current, 1.15V forward voltage at 2A, and 1.5µs reverse recovery time. The S2GH is available in active product status with AEC-Q101 automotive qualification and is suitable for direct substitution in the same circuit application.

Q: What is the difference between the Diotec S2G and the Taiwan Semiconductor S2G?

A: Both parts share identical part numbers and electrical ratings (400V/2A, 1.15V Vf, 1.5µs trr). The primary difference is manufacturer and product status. The Diotec version is currently active, while the Taiwan Semiconductor version is discontinued. The Diotec S2G is available in Cut Tape and Digi-Reel packaging options.

Q: Why are MURS140 series parts listed as similar rather than equivalent?

A: MURS140 series parts are rated for 1A average rectified current, which is below the 2A requirement of the S2G. While they share the 400V reverse voltage rating and DO-214AA package, the reduced current rating makes them unsuitable for direct replacement in 2A applications. These parts are listed for reference only.

Q: Can ES2G-13-F replace the S2G in all applications?

A: ES2G-13-F meets the 400V/2A electrical requirements and uses the same DO-214AA package. However, it exhibits different recovery characteristics (35ns fast recovery versus 1.5µs standard recovery) and higher forward voltage (1.25V @ 2A versus 1.15V @ 2A). Substitution is valid for applications where these parameter differences are acceptable. Fast recovery characteristics may provide benefits in high-frequency switching circuits.

Q: What packaging options are available for equivalent parts?

A: The S2G original part is supplied in Cut Tape (CT) packaging. Equivalent and substitute parts are available in multiple packaging configurations: Cut Tape (CT), Digi-Reel, and Tape & Reel (TR). Selection depends on production volume and assembly equipment compatibility. The DO-214AA (SMB) package remains consistent across all listed parts.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts maintain ROHS3 compliance status, consistent with the original S2G specification. This ensures compatibility with RoHS-regulated applications and supply chain requirements.

Q: What is the significance of the reverse recovery time (trr) parameter?

A: Reverse recovery time determines the diode's switching speed. The original S2G has a standard recovery time of 1.5µs (>500ns classification). Parts with faster recovery times (such as ES2G-13-F at 35ns) are suitable for higher-frequency applications. Parts with similar or longer recovery times maintain compatibility with the original design intent.

Q: Can CGRB304-G (3A rated) be used instead of a 2A-rated part?

A: Yes. CGRB304-G is rated for 400V/3A, which exceeds the 2A requirement of the S2G. The higher current rating provides design margin and is electrically compatible. This part is suitable for applications where additional current capacity is beneficial or where design margin is required.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging is supplied as individual components on tape, suitable for lower-volume production and manual assembly. Tape & Reel (TR) packaging provides continuous tape on reels, optimized for high-volume automated assembly. Both packaging types use the same DO-214AA component package; the difference is in the supply format only.

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