S1GR3 Equivalent & Substitute Parts Reference

Part Overview

The S1GR3 is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is RoHS3 compliant with AEC-Q101 automotive qualification available in variant form.

Equivalent and substitute parts are identified based on matching electrical specifications including reverse voltage rating, forward current capacity, forward voltage drop, recovery characteristics, and package form factor. Substitution becomes necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative sourcing from qualified manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	1	µA @ 400 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S1GR3 are classified into two categories based on electrical parameter alignment and product status:

Parametric Equivalents maintain identical or functionally equivalent electrical specifications across all critical parameters: 400 V reverse voltage rating, 1 A average rectified current, 1.1 V maximum forward voltage at 1 A, standard recovery characteristics with trr of 1.5 µs, and DO-214AC (SMA) surface mount package. These parts are direct functional replacements.

Similar Parts share the same voltage and current ratings and package form factor but exhibit variations in one or more secondary parameters such as reverse leakage current, capacitance, recovery speed, or operating temperature range. These parts are suitable for substitution when the application tolerates the specified parameter variations.

The following key parameters determine substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must equal 400 V
Current - Average Rectified (Io): Must equal 1 A
Package / Case: Must be DO-214AC or SMA
Mounting Type: Must be Surface Mount
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.1 V @ 1 A for parametric equivalents

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Package	Product Status	Temp Range [°C]
S1GR3	Taiwan Semiconductor Corporation	400	1	1.1 @ 1 A	1.5	1 @ 400 V	DO-214AC (SMA)	Active	-55 to 175
S1G	Diotec Semiconductor	400	1	1.1 @ 1 A	1.5	1 @ 400 V	DO-214AC (SMA)	Active	-50 to 150
S1GH	Taiwan Semiconductor Corporation	400	1	1.1 @ 1 A	1.5	1 @ 400 V	DO-214AC (SMA)	Active	-55 to 175
CS1G-E3/I	Vishay General Semiconductor - Diodes Division	400	1	1.1 @ 1 A	1.5	5 @ 400 V	DO-214AC (SMA)	Obsolete	-55 to 150
ES1G	Good-Ark Semiconductor	400	1	1.3 @ 1 A	0.035	5 @ 400 V	DO-214AC (SMA)	Active	-55 to 125
MRA4004T3G	onsemi	400	1	1.1 @ 1 A	1.5	10 @ 400 V	DO-214AC (SMA)	Not For New Designs	-55 to 175
NRVA4004T3G	onsemi	400	1	1.1 @ 1 A	1.5	10 @ 400 V	DO-214AC (SMA)	Not For New Designs	-55 to 175

Engineering Selection Recommendations

Parametric Equivalent - Recommended for Direct Substitution:

The S1GH (Taiwan Semiconductor Corporation) is a parametric equivalent offering identical electrical specifications to the S1GR3 with matching operating temperature range (-55°C to 175°C). This part carries AEC-Q101 automotive qualification and is Active product status, making it suitable for new designs and production applications requiring automotive-grade reliability.

The S1G (Diotec Semiconductor) is a parametric equivalent with identical electrical characteristics. However, the operating temperature range is reduced to -50°C to 150°C. This part is Active product status and suitable for applications where the narrower temperature range is acceptable.

Similar Parts - Conditional Substitution:

The ES1G (Good-Ark Semiconductor) is an Active product with fast recovery characteristics (trr = 35 ns versus 1.5 µs). The forward voltage is elevated to 1.3 V @ 1 A, and the maximum operating temperature is limited to 125°C. This part is suitable for applications where fast recovery performance is beneficial and the reduced temperature range is acceptable.

The MRA4004T3G and NRVA4004T3G (onsemi) are parametric equivalents with identical electrical specifications but carry "Not For New Designs" product status. These parts are suitable only for legacy system maintenance and repair applications. The NRVA4004T3G includes AEC-Q101 automotive qualification.

Not Recommended:

The CS1G-E3/I (Vishay General Semiconductor - Diodes Division) carries Obsolete product status and exhibits elevated reverse leakage current (5 µA versus 1 µA). This part is not suitable for new designs or production applications.

Frequently Asked Questions (FAQ)

Q: Can the S1G (Diotec Semiconductor) replace the S1GR3 in all applications?

A: The S1G is a parametric equivalent with identical electrical specifications. However, the operating temperature range is -50°C to 150°C compared to -55°C to 175°C for the S1GR3. Substitution is valid for applications operating within the -50°C to 150°C range. Applications requiring operation below -50°C or above 150°C require the S1GH or S1GR3.

Q: What is the difference between the S1GH and S1GR3?

A: The S1GH and S1GR3 are parametric equivalents with identical electrical specifications and operating temperature range (-55°C to 175°C). The primary difference is packaging: S1GR3 is supplied in Cut Tape format, while S1GH is supplied in Tape & Reel format. The S1GH includes AEC-Q101 automotive qualification. Both are Active product status.

Q: Is the ES1G suitable as a substitute for the S1GR3?

A: The ES1G shares the same voltage rating, current rating, and package form factor. However, it exhibits fast recovery characteristics (trr = 35 ns versus 1.5 µs) and elevated forward voltage (1.3 V @ 1 A versus 1.1 V @ 1 A). The maximum operating temperature is also reduced to 125°C. Substitution is valid only for applications where these parameter variations are acceptable.

Q: Why are MRA4004T3G and NRVA4004T3G marked "Not For New Designs"?

A: These onsemi parts carry "Not For New Designs" product status, indicating they are in the end-of-life phase. While they remain available for existing production and legacy system support, they are not recommended for new product development. The S1GH or S1G are preferred alternatives for new designs.

Q: Can I use CS1G-E3/I as a substitute?

A: The CS1G-E3/I is not recommended. This part carries Obsolete product status and exhibits elevated reverse leakage current (5 µA @ 400 V versus 1 µA @ 400 V). Active alternatives such as S1GH, S1G, or MRA4004T3G are preferred.

Q: What is the significance of the DO-214AC (SMA) package designation?

A: DO-214AC and SMA refer to the same surface mount package form factor. All substitute parts listed maintain this package specification, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes. No package conversion is required.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification, matching the S1GR3 environmental compliance status. All parts are also REACH Unaffected and carry EAR99 ECCN classification.

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