S1GR2 Equivalent & Substitute Parts Reference

Part Overview

The S1GR2 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 and complies with RoHS3 and REACH standards.

Substitute parts become necessary when the S1GR2 reaches end-of-life status, when alternative packaging formats are required for manufacturing processes, or when specific automotive qualifications are mandated for application requirements. The parts listed in this reference maintain electrical equivalence within the specified parameter ranges while offering different availability, packaging options, or qualification levels.

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	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Standard	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the S1GR2 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Technology: Standard

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.1 V @ 1 A (lower values acceptable)
Reverse Recovery Time (trr): ≤ 1.5 µs (faster recovery acceptable)
Current - Reverse Leakage @ Vr: ≤ 1 µA @ 400 V (lower leakage acceptable)
Operating Temperature - Junction: Must encompass or exceed -55°C to 175°C range
RoHS Status: ROHS3 Compliant (mandatory)

Parts are grouped as Parametric Equivalents when all mandatory parameters match exactly and acceptable variation parameters remain within specified limits. Parts are grouped as Similar when one or more acceptable variation parameters exceed the specified limits or when product status differs from Active.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	trr [µs]	Ir @ Vr [µA @ V]	Package	Temp Range [°C]	Product Status	Qualification
S1GR2	Taiwan Semiconductor Corporation	400	1	1.1 @ 1	1.5	1 @ 400	DO-214AC (SMA)	-55 to 175	Active	—
S1G	Diotec Semiconductor	400	1	1.1 @ 1	1.5	1 @ 400	DO-214AC (SMA)	-50 to 150	Active	—
S1GH	Taiwan Semiconductor Corporation	400	1	1.1 @ 1	1.5	1 @ 400	DO-214AC (SMA)	-55 to 175	Active	AEC-Q101
CS1G-E3/I	Vishay General Semiconductor - Diodes Division	400	1	1.1 @ 1	1.5	5 @ 400	DO-214AC (SMA)	-55 to 150	Obsolete	—
ES1G	Good-Ark Semiconductor	400	1	1.3 @ 1	0.035	5 @ 400	DO-214AC (SMA)	-55 to 125	Active	—
MRA4004T3G	onsemi	400	1	1.1 @ 1	1.5	10 @ 400	DO-214AC (SMA)	-55 to 175	Not For New Designs	—
NRVA4004T3G	onsemi	400	1	1.1 @ 1	1.5	10 @ 400	DO-214AC (SMA)	-55 to 175	Not For New Designs	AEC-Q101

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitution):

The S1G (Diotec Semiconductor) and S1GH (Taiwan Semiconductor Corporation) are parametric equivalents to the S1GR2. Both maintain identical electrical specifications across all critical parameters. The S1GH offers automotive-grade qualification (AEC-Q101) and identical temperature range (-55°C to 175°C), making it suitable for applications requiring automotive compliance. The S1G operates within a reduced temperature range (-50°C to 150°C) and is available in Tape & Reel packaging, suitable for high-volume manufacturing processes.

Similar Parts (Conditional Substitution):

The CS1G-E3/I (Vishay) is classified as Obsolete and exhibits elevated reverse leakage current (5 µA @ 400 V versus 1 µA @ 400 V for the S1GR2). This part is not recommended for new designs.

The ES1G (Good-Ark Semiconductor) is an Active product with fast recovery characteristics (35 ns reverse recovery time versus 1.5 µs for the S1GR2). This part exhibits higher forward voltage (1.3 V @ 1 A) and reduced maximum junction temperature (125°C versus 175°C). Selection of this part requires verification that application requirements accommodate these parameter differences.

The MRA4004T3G and NRVA4004T3G (onsemi) are classified as Not For New Designs. Both exhibit elevated reverse leakage current (10 µA @ 400 V). The NRVA4004T3G includes automotive qualification (AEC-Q101). These parts are suitable only for replacement in existing designs where original part sourcing is unavailable.

Recommended Selection Criteria:

For new designs requiring standard recovery characteristics and maximum temperature range: Select S1GH (automotive-qualified) or S1G (commercial-grade).

For applications requiring automotive compliance: Select S1GH or NRVA4004T3G.

For high-volume manufacturing with tape and reel requirements: Select S1G or NRVA4004T3G.

For applications with fast recovery requirements: Evaluate ES1G with verification of forward voltage and temperature range compatibility.

Frequently Asked Questions (FAQ)

Q: Can the S1G (Diotec) be used as a direct replacement for the S1GR2?

A: The S1G is a parametric equivalent with identical electrical specifications. However, the S1G operates within a reduced temperature range (-50°C to 150°C) compared to the S1GR2 (-55°C to 175°C). Substitution is valid only if the application operates within the S1G temperature range.

Q: What is the difference between S1GH and S1GR2?

A: The S1GH and S1GR2 are parametrically identical. The S1GH includes automotive-grade qualification (AEC-Q101) and is manufactured by Taiwan Semiconductor Corporation. Selection of S1GH is appropriate when automotive compliance is required.

Q: Why is the ES1G listed as a similar part rather than a parametric equivalent?

A: The ES1G exhibits fast recovery characteristics (35 ns versus 1.5 µs) and higher forward voltage (1.3 V @ 1 A versus 1.1 V @ 1 A). Additionally, the maximum junction temperature is reduced to 125°C. These differences require application-level verification before substitution.

Q: Can MRA4004T3G or NRVA4004T3G be used in new designs?

A: Both parts are classified as Not For New Designs. These parts are suitable only for replacement in existing designs where original part sourcing is unavailable. New designs should utilize S1GH or S1G.

Q: What packaging options are available for substitutes?

A: The S1GR2 is supplied in Cut Tape (CT) & Digi-Reel® packaging. The S1GH is available in Tape & Reel (TR) format. The S1G is available in both Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) formats. Packaging selection depends on manufacturing process requirements.

Q: Is the CS1G-E3/I suitable for substitution?

A: The CS1G-E3/I is classified as Obsolete and exhibits elevated reverse leakage current (5 µA @ 400 V). This part is not recommended for any new or replacement applications.

Q: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at high voltages. The S1GR2 specifies 1 µA @ 400 V. Parts with higher leakage (CS1G-E3/I at 5 µA, MRA4004T3G and NRVA4004T3G at 10 µA) may require circuit-level evaluation to ensure acceptable performance in applications sensitive to leakage current.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference are RoHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the S1GR2.

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