S2G-E3/1 Equivalent & Substitute Parts

Part Overview

The S2G-E3/1 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 400 V DC reverse voltage with 1.5 A average rectified current in a DO-214AA (SMB) package. The device is classified as Active product status with standard recovery characteristics and is RoHS3 compliant.

Substitute parts are necessary when the original S2G-E3/1 becomes unavailable, when alternative packaging formats are required, or when design specifications allow for equivalent electrical performance from alternative manufacturers. Substitution must maintain compatibility with the 400 V voltage rating and surface mount DO-214AA package format while meeting the application's current and thermal requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 400 V
Capacitance @ Vr, F	16	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S2G-E3/1 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Package / Case: Must be DO-214AA (SMB) surface mount format
Mounting Type: Must be Surface Mount
Current - Average Rectified (Io): Must support minimum 1.5 A operation

Allowable Variation Parameters:

Current - Average Rectified (Io): Substitute parts may exceed 1.5 A (uprating acceptable)
Voltage - Forward (Vf): Minor variations acceptable within standard rectifier specifications
Reverse Recovery Time (trr): Faster recovery times acceptable (standard to fast recovery)
Current - Reverse Leakage: Variations acceptable within standard diode specifications
Operating Temperature Range: Extended ranges acceptable
Manufacturer: Alternative manufacturers acceptable if electrical parameters align

Non-Substitutable Parameters:

Voltage rating below 400 V
Package format other than DO-214AA (SMB)
Through-hole or alternative mounting technologies

Parameter Comparison

Parameter	S2G-E3/1 (Vishay)	S2G (Diotec)	S2G-13-F (Diodes Inc.)	STTH1R04U (STMicro)	STTH1R04UY (STMicro)	STTH3R04U (STMicro)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1.5 A	2 A	1.5 A	1 A	1 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 2 A	1.15 V @ 1.5 A	1.5 V @ 1 A	1.6 V @ 1 A	1.5 V @ 3 A
Reverse Recovery Time (trr)	2 µs	1.5 µs	Not specified	30 ns	30 ns	35 ns
Current - Reverse Leakage @ Vr	1 µA @ 400 V	5 µA @ 1700 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-50 to 150°C	-65 to 150°C	175°C (Max)	-40 to 175°C	175°C (Max)
RoHS Status	ROHS3 Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: S2G-13-F (Diodes Incorporated)

The S2G-13-F is the closest electrical equivalent to the S2G-E3/1. Both devices share identical voltage rating (400 V), current rating (1.5 A), forward voltage (1.15 V @ 1.5 A), and package format (DO-214AA, SMB). The S2G-13-F is RoHS3 compliant and REACH unaffected, matching the compliance profile of the original part. Operating temperature range extends to -65°C minimum, providing broader thermal coverage. This part is available in high inventory (57,100 units) in Tape & Reel packaging format.

Secondary Substitute: S2G (Diotec Semiconductor)

The S2G from Diotec provides a current uprating to 2 A while maintaining the 400 V voltage specification and DO-214AA package. Forward voltage remains at 1.15 V. Reverse recovery time improves to 1.5 µs. This part is suitable for applications where current margin is beneficial. Inventory availability is high (3,915 units). RoHS status is not applicable for this manufacturer variant.

Conditional Substitutes: STTH1R04U and STTH1R04UY (STMicroelectronics)

The STTH1R04U and STTH1R04UY are suitable only for applications where the 1.5 A current requirement can be reduced to 1 A operation. Both maintain the 400 V voltage rating and DO-214AA package. These parts feature fast recovery characteristics (30 ns trr) compared to the standard recovery of the S2G-E3/1. The STTH1R04UY includes automotive qualification (AEC-Q101) and extended temperature range (-40 to 175°C), making it suitable for automotive applications. The STTH1R04U provides standard industrial-grade performance.

Higher Current Alternative: STTH3R04U (STMicroelectronics)

The STTH3R04U provides a 3 A current rating at 400 V in the DO-214AA package. This part is suitable for applications requiring current uprating beyond the original 1.5 A specification. Fast recovery characteristics (35 ns trr) are provided. This part is RoHS3 compliant with high inventory availability (10,400 units).

Frequently Asked Questions (FAQ)

Q: Can the S2G-E3/1 be replaced with a lower current rated diode?

A: No. Substitute parts must support the minimum 1.5 A average rectified current requirement. The STTH1R04U and STTH1R04UY are rated at 1 A and are not suitable for direct replacement in applications requiring 1.5 A operation.

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

A: The S2G-E3/1 has a reverse recovery time (trr) of 2 µs (standard recovery). The STMicroelectronics parts (STTH series) have trr values of 30-35 ns (fast recovery). Fast recovery diodes switch more quickly and generate less switching noise, making them suitable for higher frequency applications. Both types are electrically compatible at the 400 V, 1.5 A operating point.

Q: Is the S2G-13-F a direct replacement for the S2G-E3/1?

A: Yes. The S2G-13-F matches all critical parameters: 400 V voltage rating, 1.5 A current rating, 1.15 V forward voltage, and DO-214AA package. Both are RoHS3 compliant. The primary difference is packaging format (Tape & Reel versus the original format) and extended minimum operating temperature (-65°C versus -55°C).

Q: Can I use the S2G (Diotec) as a substitute if my application only requires 1.5 A?

A: Yes. The S2G from Diotec is rated at 2 A, which exceeds the 1.5 A requirement. Current uprating is acceptable in rectifier diode substitution. The 400 V voltage rating, forward voltage, and package format are compatible. Higher current rating provides design margin without compromising performance.

Q: What is the advantage of the STTH1R04UY over the STTH1R04U?

A: The STTH1R04UY includes automotive qualification (AEC-Q101) and extended operating temperature range (-40 to 175°C) compared to the STTH1R04U (175°C maximum). The STTH1R04UY is suitable for automotive and industrial applications requiring temperature stability. Both parts are limited to 1 A operation and are not recommended for direct replacement of the 1.5 A S2G-E3/1 in current-critical applications.

Q: Are all substitute parts available in the same packaging format?

A: No. The S2G-E3/1 original packaging format is not specified in the provided data. Substitute parts are available in Cut Tape (CT) & Digi-Reel® format (S2G, STTH1R04U, STTH3R04U) and Tape & Reel (TR) format (S2G-13-F, STTH1R04UY). Verify packaging compatibility with your procurement and assembly requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: The S2G-13-F, STTH1R04U, STTH1R04UY, and STTH3R04U are all RoHS3 compliant. The S2G (Diotec) has RoHS status listed as "Not applicable." Verify RoHS compliance requirements for your specific application and regulatory jurisdiction.

Q: Can the STTH3R04U be used in place of the S2G-E3/1?

A: Yes. The STTH3R04U maintains the 400 V voltage rating and DO-214AA package. The 3 A current rating exceeds the 1.5 A requirement, providing design margin. Fast recovery characteristics (35 ns) differ from the standard recovery (2 µs) of the original part but are electrically compatible. This substitution is suitable for applications where higher current capacity is beneficial.

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