S2G Equivalent & Substitute Parts

Part Overview

The S2G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status with standard recovery characteristics and operates across a junction temperature range of -55°C to 150°C. The S2G is RoHS3 compliant and MSL 1 rated, suitable for general rectification applications in power supply and signal conditioning circuits. Equivalent and substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatible mechanical packaging and thermal operating ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	1	µA @ 400 V
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the S2G are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 400 V reverse voltage rating, 2 A average rectified current, 1.15 V forward voltage drop at 2 A, 1.5 µs reverse recovery time, and DO-214AA SMB package. These parts differ only in packaging format (Cut Tape versus Tape & Reel) or product status (Active versus Discontinued). Parametric equivalents include S2G R5G and S2GH.

Similar Parts share the same reverse voltage rating (400 V) and package type (DO-214AA SMB) but exhibit variations in one or more of the following parameters: average rectified current rating, forward voltage drop, reverse recovery time, reverse leakage current, or operating temperature range. These parts are suitable for applications where the S2G specifications exceed circuit requirements or where alternative performance characteristics are acceptable. Similar parts include CGRB204-G, CGRB304-G, ES2G-13-F, MURS140-13-F, MURS140-E3/52T, MURS140-E3/5BT, MURS240-E3/52T, and MURS240-M3/52T.

The key parameters determining substitution eligibility are: reverse voltage rating (minimum 400 V), average rectified current (minimum 2 A for direct equivalents), forward voltage drop (maximum 1.25 V for similar parts), package type (DO-214AA SMB), and operating temperature range (minimum -55°C to 150°C).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Tj Range [°C]	Product Status
S2G	Taiwan Semiconductor	400	2	1.15 @ 2A	1.5 µs	1 @ 400V	DO-214AA SMB	-55 to 150	Active
S2G R5G	Taiwan Semiconductor	400	2	1.15 @ 2A	1.5 µs	1 @ 400V	DO-214AA SMB	-55 to 150	Discontinued at DiGi Electronics
S2GH	Taiwan Semiconductor	400	2	1.15 @ 2A	1.5 µs	1 @ 400V	DO-214AA SMB	-55 to 150	Active (AEC-Q101)
CGRB204-G	Comchip Technology	400	2	1.1 @ 2A	Standard	5 @ 400V	DO-214AA SMB	-55 to 150	Active
CGRB304-G	Comchip Technology	400	3	1.1 @ 3A	Standard	5 @ 400V	DO-214AA SMB	-55 to 150	Active
ES2G-13-F	Diodes Incorporated	400	2	1.25 @ 2A	35 ns	5 @ 400V	DO-214AA SMB	-55 to 150	Active
MURS140-13-F	Diodes Incorporated	400	1	1.25 @ 1A	50 ns	5 @ 400V	DO-214AA SMB	-55 to 175	Active
MURS140-E3/52T	Vishay General Semiconductor	400	2	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA SMB	-65 to 175	Active
MURS140-E3/5BT	Vishay General Semiconductor	400	2	1.25 @ 1A	75 ns	5 @ 400V	DO-214AA SMB	-65 to 175	Active
MURS240-E3/52T	Vishay General Semiconductor	400	2	1.45 @ 2A	75 ns	5 @ 400V	DO-214AA SMB	-65 to 175	Active
MURS240-M3/52T	Vishay General Semiconductor	400	2	1.45 @ 2A	75 ns	5 @ 400V	DO-214AA SMB	-65 to 175	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Direct Replacement)

S2GH is the preferred parametric equivalent when product availability and active status are prioritized. S2GH maintains identical electrical specifications to the S2G while offering AEC-Q101 automotive qualification, extended operating temperature range support, and higher inventory availability (7154 units). S2GH is suitable for applications requiring automotive-grade reliability or where enhanced qualification documentation is required.

S2G R5G is a parametric equivalent with identical electrical performance but is listed as Discontinued at DiGi Electronics. This part should be selected only when existing inventory is available and long-term supply continuity is not a requirement.

Similar Parts for Voltage and Current Compatibility

CGRB204-G (Comchip Technology) provides 400 V / 2 A performance with lower forward voltage drop (1.1 V versus 1.15 V) and is Active status. This part is suitable for applications where reduced forward voltage loss is beneficial.

CGRB304-G (Comchip Technology) provides 400 V / 3 A performance, exceeding the S2G current rating. This part is suitable for applications requiring higher current capacity within the same voltage class.

ES2G-13-F (Diodes Incorporated) provides 400 V / 2 A performance with fast recovery characteristics (35 ns trr) and is Active status. This part is suitable for applications requiring faster switching performance.

Similar Parts for Extended Temperature Range

MURS140-E3/52T, MURS140-E3/5BT, MURS240-E3/52T, and MURS240-M3/52T (Vishay General Semiconductor) all provide extended operating temperature range (-65°C to 175°C) compared to the S2G (-55°C to 150°C). These parts are suitable for applications requiring operation at lower ambient temperatures or higher junction temperatures.

MURS140-13-F (Diodes Incorporated) provides extended operating temperature range (-55°C to 175°C) with 400 V / 1 A performance and is suitable for lower-current applications requiring higher temperature capability.

All recommended substitute parts maintain RoHS3 compliance, MSL 1 rating, and DO-214AA SMB package compatibility with the S2G.

Frequently Asked Questions (FAQ)

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

A: Yes. S2GH is a parametric equivalent with identical electrical specifications (400 V, 2 A, 1.15 V forward drop, 1.5 µs recovery time) and the same DO-214AA SMB package. S2GH is Active status and offers AEC-Q101 automotive qualification. The only difference is packaging format (Tape & Reel for S2GH versus Cut Tape for S2G).

Q: What is the difference between parametric equivalents and similar parts?

A: Parametric equivalents (S2G R5G, S2GH) maintain identical electrical performance across all critical specifications. Similar parts (CGRB204-G, ES2G-13-F, MURS series) share the same voltage rating and package but differ in current rating, forward voltage drop, recovery time, or operating temperature range. Similar parts are suitable when circuit requirements allow for these variations.

Q: Can MURS140-13-F replace S2G in a 2 A application?

A: No. MURS140-13-F is rated for 1 A average rectified current, which is insufficient for applications requiring 2 A. Using an undersized diode will result in excessive junction temperature and reduced component lifetime.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the S2G environmental and regulatory status.

Q: What is the advantage of ES2G-13-F over S2G?

A: ES2G-13-F provides identical 400 V / 2 A performance with significantly faster reverse recovery time (35 ns versus 1.5 µs). This faster switching characteristic reduces switching losses and is beneficial in high-frequency rectification applications. ES2G-13-F has higher reverse leakage current (5 µA versus 1 µA) and slightly higher forward voltage drop (1.25 V versus 1.15 V).

Q: Can CGRB304-G be used in place of S2G?

A: Yes, with design consideration. CGRB304-G provides 400 V / 3 A performance, exceeding the S2G current rating. The higher current rating does not prevent use in 2 A applications; however, the diode will operate at lower junction temperature and stress levels. CGRB304-G has lower forward voltage drop (1.1 V) and higher reverse leakage current (5 µA).

Q: What is the significance of the extended temperature range in MURS240 series parts?

A: MURS240 series parts operate from -65°C to 175°C, compared to S2G's -55°C to 150°C range. The extended lower temperature limit (-65°C versus -55°C) is beneficial for applications in cold environments or aerospace applications. The extended upper temperature limit (175°C versus 150°C) allows operation in higher-temperature circuit environments without derating.

Q: Are Cut Tape and Tape & Reel packaging electrically equivalent?

A: Yes. Cut Tape (CT) and Tape & Reel (TR) packaging formats contain identical die and electrical performance. The difference is in the physical delivery format for automated assembly. Cut Tape is supplied on individual tape strips, while Tape & Reel is supplied on continuous reel format for high-volume production lines.

Q: Why does MURS140-E3/52T show Vf @ 1A when the part is rated for 2A?

A: Forward voltage specifications are typically provided at the rated current or at a reference current level. MURS140-E3/52T is rated for 2 A average rectified current but the forward voltage specification is provided at 1 A reference. At 2 A operation, the actual forward voltage will be higher than the specified 1.25 V value.

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