ES3G-E3/9AT Equivalent & Substitute Parts

Part Overview

The ES3G-E3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 400 V DC reverse voltage with a 3 A average rectified current rating and is packaged in the DO-214AB (SMC) form factor. The device is classified as Active product status and is ROHS3 compliant.

Substitute parts are necessary when the original ES3G-E3/9AT becomes unavailable due to supply constraints, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for equivalent electrical performance from alternative manufacturers while maintaining functional compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 3 A
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Capacitance @ Vr, F	30	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 eligibility for the ES3G-E3/9AT is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: May vary within acceptable circuit design margins
Reverse Recovery Time (trr): May be equal to or faster than specified
Current - Reverse Leakage @ Vr: May be equal to or lower than specified
Capacitance @ Vr, F: May vary based on manufacturer design
Operating Temperature - Junction: May extend beyond the original range
Packaging Format: Tape & Reel (TR) and Cut Tape (CT) are interchangeable for the same component

Substitute parts are grouped into three categories: Parametric Equivalents (identical electrical specifications from the same manufacturer with different packaging), Direct Manufacturer Alternatives (equivalent specifications from different manufacturers), and MFR Recommended Alternatives (manufacturer-approved substitutes with potential minor specification variations).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Packaging Format	Product Status
ES3G-E3/9AT	Vishay	400	3	1.1 @ 3A	50	10 @ 400V	DO-214AB, SMC	Tape & Reel (TR)	Active
ES3G-E3/57T	Vishay	400	3	1.1 @ 3A	50	10 @ 400V	DO-214AB, SMC	Cut Tape (CT)	Active
ES3GHE3_A/H	Vishay	400	3	1.1 @ 3A	50	10 @ 400V	DO-214AB, SMC	Tape & Reel (TR)	Active
STTH3R04S	STMicroelectronics	400	3	1.5 @ 3A	35	5 @ 400V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Active
ACGRCT302-HF	Comchip Technology	400	3	1.0 @ 3A	—	5 @ 400V	2-SMD, No Lead	Tape & Reel (TR)	Last Time Buy
ER3G-TP	Micro Commercial Co	400	3	1.25 @ 3A	35	5 @ 400V	DO-214AB, SMC	Tape & Reel (TR)	Active
S3G-13-F	Diodes Incorporated	400	3	1.15 @ 3A	—	10 @ 400V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Active
S3G-TP	Micro Commercial Co	400	3	1.2 @ 3A	—	10 @ 400V	DO-214AB, SMC	Tape & Reel (TR)	Not For New Designs

Engineering Selection Recommendations

Parametric Equivalents (Vishay Series): ES3G-E3/57T and ES3GHE3_A/H are direct parametric equivalents to the ES3G-E3/9AT with identical electrical specifications. ES3G-E3/57T differs only in packaging format (Cut Tape versus Tape & Reel). ES3GHE3_A/H carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components. Both maintain Active product status.

Direct Manufacturer Alternative: STTH3R04S from STMicroelectronics meets all mandatory electrical parameters with improved performance characteristics: faster reverse recovery time (35 ns versus 50 ns) and lower reverse leakage current (5 µA versus 10 µA). This component is suitable for applications where enhanced switching performance is beneficial. Operating temperature maximum extends to 175°C.

MFR Recommended Alternatives: ER3G-TP from Micro Commercial Co and S3G-13-F from Diodes Incorporated are Active-status alternatives meeting all mandatory parameters. ER3G-TP offers faster recovery time (35 ns) and lower leakage current (5 µA) with extended temperature range to 175°C. S3G-13-F maintains standard recovery characteristics with Active product status.

Not Recommended for New Designs: S3G-TP carries "Not For New Designs" product status and should not be selected for new circuit implementations.

Last Time Buy Status: ACGRCT302-HF from Comchip Technology is designated Last Time Buy. This part meets electrical requirements but should only be selected if existing inventory commitments or design lock-in requirements necessitate its use.

Frequently Asked Questions (FAQ)

Q: Can ES3G-E3/57T be used as a direct replacement for ES3G-E3/9AT?

A: Yes. ES3G-E3/57T is a parametric equivalent with identical electrical specifications. The only difference is packaging format: ES3G-E3/57T is supplied in Cut Tape (CT) format while ES3G-E3/9AT is supplied in Tape & Reel (TR) format. Both are suitable for surface mount assembly processes.

Q: What is the difference between the Vishay ES3GHE3_A/H and the standard ES3G-E3/9AT?

A: Electrical specifications are identical. ES3GHE3_A/H carries AEC-Q101 automotive qualification, making it suitable for automotive applications requiring qualified components. Both are Active status products from Vishay.

Q: Is STTH3R04S a suitable substitute despite having different forward voltage and recovery time specifications?

A: STTH3R04S meets all mandatory parameters: 400 V reverse voltage, 3 A current rating, and DO-214AB SMC package. The differences in forward voltage (1.5 V versus 1.1 V) and faster recovery time (35 ns versus 50 ns) represent performance improvements. Circuit design must accommodate the higher forward voltage drop if thermal or efficiency margins are critical.

Q: Why is S3G-TP marked "Not For New Designs"?

A: S3G-TP carries this designation from the manufacturer. While it meets electrical specifications, it should not be selected for new circuit designs. Use alternative Active-status parts such as S3G-13-F or ER3G-TP instead.

Q: Can ACGRCT302-HF be used in new designs?

A: ACGRCT302-HF is designated Last Time Buy, indicating the manufacturer is discontinuing this part. It should only be used if existing design commitments or inventory requirements necessitate its selection. For new designs, select from Active-status alternatives.

Q: Are there temperature range limitations when substituting parts?

A: The original ES3G-E3/9AT operates from -55°C to 150°C junction temperature. Substitute parts with extended temperature ranges (such as STTH3R04S and ER3G-TP, rated to 175°C) are compatible with the original specification and provide additional thermal margin. Parts with narrower ranges must be verified against application requirements.

Q: What is the significance of reverse recovery time differences between substitutes?

A: Reverse recovery time (trr) affects switching speed and switching losses. The ES3G-E3/9AT specifies 50 ns. Substitutes with faster recovery times (35 ns for STTH3R04S and ER3G-TP) reduce switching losses and may improve circuit efficiency. Standard recovery alternatives (S3G-13-F and S3G-TP) maintain the original recovery characteristic classification.

Q: Can packaging format be changed between Tape & Reel and Cut Tape?

A: Yes. Tape & Reel (TR) and Cut Tape (CT) formats contain identical components and differ only in supply method. Selection between formats depends on assembly equipment compatibility and procurement requirements. Both formats are suitable for automated surface mount assembly.

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