ES3AHE3/9AT Equivalent & Substitute Parts

Part Overview

The ES3AHE3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. The diode features fast recovery characteristics with a 30 ns reverse recovery time, automotive-grade qualification (AEC-Q101), and operates across a junction temperature range of -55°C to 150°C. Identifying compatible alternatives ensures design flexibility and supply chain resilience.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 3 A	mV @ A
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Capacitance @ Vr, F	45	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ES3AHE3/9AT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Operating Temperature - Junction: -55°C to 150°C
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitutes may vary within engineering tolerance
Reverse Recovery Time (trr): Substitutes with equal or faster recovery are acceptable
Current - Reverse Leakage @ Vr: Substitutes with equal or lower leakage are acceptable
Capacitance @ Vr, F: Minor variations acceptable

Compliance Considerations:

RoHS3 Compliance required for all substitutes
Automotive-grade (AEC-Q101) qualification preferred for automotive applications
Product Status: Active parts preferred over obsolete or not-for-new-designs classifications

Substitute parts are grouped into three categories: direct manufacturer equivalents from Vishay, parametric equivalents from Vishay with identical electrical specifications, and manufacturer-recommended alternatives from other suppliers meeting the same electrical and mechanical requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ A]	trr [ns]	Ir @ Vr [µA @ V]	Package	Status	AEC-Q101
ES3AHE3/9AT	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Obsolete	Yes
ES3AHE3_A/I	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	Yes
ES3AHE3_A/H	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	Yes
ES3A-E3/57T	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	No
ES3A-E3/9AT	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	No
ES3A-M3/57T	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	No
ES3A-M3/9AT	Vishay	50	3	900 @ 3	30	10 @ 50	DO-214AB	Active	No
ES3A	Taiwan Semiconductor	50	3	950 @ 3	35	10 @ 50	DO-214AB	Active	No
S3A-13-F	Diodes Incorporated	50	3	1150 @ 3	>500	10 @ 50	DO-214AB	Active	No
SMLJ60S05-TP	Micro Commercial Co	50	6	1000 @ 6	>500	5 @ 50	DO-214AB	Not For New Designs	No
S10A-TP	Micro Commercial Co	50	10	1200 @ 10	>500	10 @ 50	DO-214AB	Obsolete	No

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

ES3AHE3_A/I and ES3AHE3_A/H are the preferred direct substitutes for ES3AHE3/9AT. Both parts are manufactured by Vishay General Semiconductor - Diodes Division, maintain identical electrical specifications (50 V, 3 A, 900 mV forward voltage, 30 ns recovery time), and carry automotive-grade AEC-Q101 qualification. These parts are in active product status with substantial inventory availability (1106 Pcs and 1075 Pcs respectively). The primary difference is packaging format: ES3AHE3_A/I and ES3AHE3_A/H are supplied in Tape & Reel format, whereas the original ES3AHE3/9AT was supplied in bulk packaging.

Secondary Substitutes (Vishay Parametric Equivalents):

ES3A-E3/57T, ES3A-E3/9AT, ES3A-M3/57T, and ES3A-M3/9AT are parametric equivalents from Vishay with identical electrical performance. These parts maintain the same 50 V, 3 A, 900 mV, and 30 ns specifications. However, these parts do not carry AEC-Q101 automotive qualification. They are suitable for non-automotive applications or where automotive qualification is not required. All four parts are in active status with inventory availability ranging from 824 to 5250 pieces.

Alternative Manufacturer Substitutes:

ES3A (Taiwan Semiconductor Corporation) is an active alternative with 17100 pieces in stock. This part meets the 50 V, 3 A core requirements but exhibits slightly higher forward voltage (950 mV) and longer recovery time (35 ns). It lacks automotive qualification.

S3A-13-F (Diodes Incorporated) is an active alternative with 15200 pieces in stock. This part meets the 50 V, 3 A core requirements but exhibits significantly higher forward voltage (1150 mV) and standard recovery characteristics (>500 ns). It lacks automotive qualification.

Not Recommended for Direct Substitution:

SMLJ60S05-TP and S10A-TP do not qualify as direct substitutes. SMLJ60S05-TP is rated for 6 A (exceeds 3 A requirement) and carries "Not For New Designs" status. S10A-TP is rated for 10 A (exceeds 3 A requirement) and is obsolete. While these parts share the 50 V voltage rating and DO-214AB package, their higher current ratings and non-active status make them unsuitable for direct replacement in designs specified for 3 A operation.

Frequently Asked Questions (FAQ)

Q: Can I use ES3AHE3_A/I or ES3AHE3_A/H as a direct replacement for ES3AHE3/9AT?

A: Yes. Both parts are direct substitutes manufactured by Vishay with identical electrical specifications (50 V, 3 A, 900 mV forward voltage, 30 ns recovery time), automotive-grade AEC-Q101 qualification, and the same DO-214AB package. The only difference is the packaging format (Tape & Reel versus bulk). Both parts are in active production status.

Q: What is the difference between ES3AHE3_A/I and ES3AHE3_A/H?

A: Both parts are electrically identical with the same specifications and AEC-Q101 qualification. The designations reflect different packaging reel specifications. Selection between these two should be based on your assembly equipment compatibility and procurement requirements.

Q: Can I use Vishay ES3A-E3/57T or ES3A-E3/9AT instead of ES3AHE3/9AT?

A: These parts are parametric equivalents with identical electrical specifications. However, they do not carry AEC-Q101 automotive qualification. Use these substitutes only in non-automotive applications or where automotive qualification is not a design requirement. All three parts are electrically interchangeable in terms of voltage, current, and recovery characteristics.

Q: Why should I avoid S10A-TP and SMLJ60S05-TP?

A: S10A-TP is rated for 10 A (not 3 A) and is obsolete. SMLJ60S05-TP is rated for 6 A (not 3 A) and carries "Not For New Designs" status. While both share the 50 V voltage rating and DO-214AB package, their higher current ratings make them oversized for 3 A applications. Additionally, their non-active status makes them poor choices for new designs.

Q: What is the impact of forward voltage differences between substitutes?

A: The ES3AHE3/9AT specifies 900 mV forward voltage at 3 A. Substitutes like ES3A (950 mV) and S3A-13-F (1150 mV) exhibit higher forward voltage. Higher forward voltage results in increased power dissipation and heat generation in the diode. For designs with tight thermal budgets or high-frequency switching applications, verify that the substitute's forward voltage is acceptable for your circuit performance requirements.

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

A: The ES3AHE3/9AT specifies 30 ns reverse recovery time (fast recovery). Substitutes like ES3A (35 ns) have slightly longer recovery times, while S3A-13-F and SMLJ60S05-TP have standard recovery (>500 ns). Longer recovery times increase switching losses and may affect circuit performance in high-frequency applications. For fast-switching circuits, prioritize substitutes with recovery times ≤ 35 ns.

Q: Is the DO-214AB package the same across all substitutes?

A: Yes. All recommended substitutes use the DO-214AB (SMC) surface mount package, ensuring mechanical and thermal compatibility. However, verify that your PCB footprint and assembly process are compatible with the specific supplier device package designation, as some manufacturers use slightly different nomenclature (SMC, HSMC, etc.).

Q: Can I use Taiwan Semiconductor ES3A as a substitute in automotive applications?

A: ES3A meets the electrical requirements (50 V, 3 A) but does not carry AEC-Q101 automotive qualification. For automotive applications requiring AEC-Q101 certification, use ES3AHE3_A/I, ES3AHE3_A/H, or the original ES3AHE3/9AT. For non-automotive applications, ES3A is acceptable.

Q: What inventory considerations should I factor into my substitution decision?

A: ES3A-E3/57T has the highest inventory (5250 pieces), followed by S3A-13-F (15200 pieces) and ES3A (17100 pieces). If supply continuity is critical, these high-inventory alternatives provide better long-term availability. However, prioritize electrical specifications and compliance requirements over inventory levels when making substitution decisions.

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