S3G-E3/9AT Equivalent & Substitute Parts

Part Overview

The S3G-E3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 400 V DC reverse voltage with 3 A average rectified current in a DO-214AB (SMC) package. The part is currently active and in production with 12,300 units in stock.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support applications requiring alternative packaging formats or enhanced performance characteristics while maintaining electrical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2.5 A	V
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the S3G-E3/9AT is determined by equivalence in the following critical electrical parameters:

Voltage Rating: 400 V DC reverse voltage (Vr)
Current Rating: 3 A average rectified current (Io)
Package Type: DO-214AB (SMC) surface mount package
Forward Voltage: Vf ≤ 1.5 V @ rated current
Reverse Leakage: ≤ 10 µA @ 400 V
Temperature Range: Operating junction temperature -55°C to 150°C minimum
Compliance: ROHS3 compliant, MSL 1

Substitute parts are grouped into the following categories:

Parametric Equivalents (Vishay S3G Series): Parts S3G-E3/57T, S3GHE3_A/H, and S3GHE3_A/I maintain identical electrical specifications with variations in packaging format (Cut Tape vs. Tape & Reel) and automotive qualification. These parts are direct functional replacements.

Direct Manufacturer Alternatives: Parts STTH3R04S (STMicroelectronics) and S3G-TP (Micro Commercial Co) provide equivalent voltage and current ratings with variations in recovery speed and forward voltage characteristics.

Upgrade Option: Part S3G-13-F (Diodes Incorporated) offers equivalent electrical performance with extended lower temperature range (-65°C vs. -55°C).

Manufacturer Recommended: Part ER3G-TP (Micro Commercial Co) provides enhanced performance with faster recovery time (35 ns vs. 2.5 µs) and higher maximum junction temperature (175°C vs. 150°C).

Automotive Qualified: Parts S3GHE3_A/H, S3GHE3_A/I, and ACGRC304-HF carry AEC-Q101 qualification for automotive applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Packaging Format	Tj (Max) [°C]	Product Status	Automotive Grade
S3G-E3/9AT	Vishay	400	3	1.15 @ 2.5A	2.5 µs	10 @ 400V	DO-214AB	Tape & Reel	150	Active	—
S3G-E3/57T	Vishay	400	3	1.15 @ 2.5A	2.5 µs	10 @ 400V	DO-214AB	Cut Tape	150	Active	—
S3GHE3_A/H	Vishay	400	3	1.15 @ 2.5A	2.5 µs	10 @ 400V	DO-214AB	Cut Tape	150	Active	AEC-Q101
S3GHE3_A/I	Vishay	400	3	1.15 @ 2.5A	2.5 µs	10 @ 400V	DO-214AB	Cut Tape	150	Active	AEC-Q101
S3G-TP	Micro Commercial Co	400	3	1.2 @ 3A	2.5 µs	10 @ 400V	DO-214AB	Tape & Reel	150	Not For New Designs	—
STTH3R04S	STMicroelectronics	400	3	1.5 @ 3A	35 ns	5 @ 400V	DO-214AB	Cut Tape & Digi-Reel	175	Active	—
S3G-13-F	Diodes Incorporated	400	3	1.15 @ 3A	2.5 µs	10 @ 400V	DO-214AB	Cut Tape & Digi-Reel	150	Active	—
ER3G-TP	Micro Commercial Co	400	3	1.25 @ 3A	35 ns	5 @ 400V	DO-214AB	Tape & Reel	175	Active	—
ACGRC304-HF	Comchip Technology	400	3	1.15 @ 3A	2.5 µs	5 @ 400V	DO-214AB	Tape & Reel	150	Active	AEC-Q101

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

Select S3G-E3/57T when Cut Tape packaging is acceptable. This part is electrically and mechanically identical to the S3G-E3/9AT with higher inventory availability (30,400 units).

For Automotive Applications

Select S3GHE3_A/H or S3GHE3_A/I for designs requiring AEC-Q101 automotive qualification. Both parts maintain identical electrical specifications to the main part and are available in Cut Tape format. S3GHE3_A/I has higher inventory (23,570 units vs. 7,675 units).

Alternatively, select ACGRC304-HF (Comchip Technology) for automotive-qualified applications with AEC-Q101 certification and lower reverse leakage current (5 µA vs. 10 µA).

For Enhanced Performance

Select STTH3R04S (STMicroelectronics) or ER3G-TP (Micro Commercial Co) when faster recovery time is required. Both parts feature 35 ns reverse recovery time compared to 2.5 µs in the main part, and support higher maximum junction temperature (175°C vs. 150°C). STTH3R04S is available in Cut Tape & Digi-Reel format with 16,898 units in stock. ER3G-TP is available in Tape & Reel format with 42,810 units in stock.

For Extended Temperature Range

Select S3G-13-F (Diodes Incorporated) when lower operating temperature range is required (-65°C vs. -55°C minimum). This part maintains standard recovery characteristics and is available in Cut Tape & Digi-Reel format with 30,400 units in stock.

Not Recommended for New Designs

S3G-TP (Micro Commercial Co) carries "Not For New Designs" product status and should not be selected for new circuit designs despite electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can S3G-E3/57T be used as a direct replacement for S3G-E3/9AT?

A: Yes. S3G-E3/57T is electrically and mechanically identical to S3G-E3/9AT. The only difference is packaging format: S3G-E3/57T is supplied in Cut Tape format while S3G-E3/9AT is supplied in Tape & Reel format. Both are DO-214AB (SMC) surface mount packages with identical pin configuration and footprint.

Q: What is the difference between standard recovery and fast recovery diodes in this product line?

A: The S3G-E3/9AT features standard recovery with 2.5 µs reverse recovery time. Fast recovery alternatives such as STTH3R04S and ER3G-TP feature 35 ns reverse recovery time. Fast recovery diodes reduce switching losses and are suitable for high-frequency applications. Standard recovery diodes are suitable for line-frequency and low-frequency rectification applications.

Q: Are automotive-qualified versions available?

A: Yes. S3GHE3_A/H, S3GHE3_A/I, and ACGRC304-HF all carry AEC-Q101 automotive qualification. These parts maintain the 400 V / 3 A electrical specifications and DO-214AB package of the main part.

Q: What is the maximum junction temperature difference between substitute parts?

A: The main part S3G-E3/9AT and most standard recovery substitutes support maximum junction temperature of 150°C. Fast recovery alternatives (STTH3R04S and ER3G-TP) support 175°C maximum junction temperature, providing 25°C additional thermal margin.

Q: Can I use STTH3R04S in place of S3G-E3/9AT in existing designs?

A: STTH3R04S is electrically compatible with identical 400 V / 3 A ratings and DO-214AB package. However, the forward voltage is higher (1.5 V @ 3 A vs. 1.15 V @ 2.5 A) and reverse recovery time is significantly faster (35 ns vs. 2.5 µs). Verify that the circuit design accommodates these differences, particularly in rectifier bridge applications where forward voltage drop affects efficiency and in switching applications where recovery time affects EMI characteristics.

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

A: Both are surface mount packaging formats for automated assembly. Tape & Reel format supplies components on continuous carrier tape wound on reels, suitable for high-volume automated pick-and-place assembly. Cut Tape format supplies components on cut sections of carrier tape, suitable for lower-volume assembly or manual handling. Electrical and mechanical specifications are identical between formats.

Q: Is the S3G-TP suitable for new designs?

A: No. S3G-TP carries "Not For New Designs" product status. Select alternative parts such as S3G-E3/57T, S3GHE3_A/H, S3GHE3_A/I, or S3G-13-F for new circuit designs.

Q: What is the reverse leakage current difference between substitute parts?

A: The main part S3G-E3/9AT specifies 10 µA reverse leakage at 400 V. STTH3R04S, ER3G-TP, and ACGRC304-HF specify 5 µA reverse leakage at 400 V, representing lower leakage current. Lower reverse leakage reduces standby power consumption and is beneficial in battery-powered or low-power applications.

Q: Can I mix different manufacturers' parts in the same circuit?

A: Yes. All substitute parts maintain identical 400 V / 3 A electrical specifications and DO-214AB package. However, verify that forward voltage and reverse recovery time variations do not affect circuit performance. In bridge rectifier applications, using parts from different manufacturers with different forward voltage characteristics may result in unequal current distribution. Consult circuit design requirements before mixing manufacturers.

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