ES3A-E3/9AT Equivalent & Substitute Parts

Part Overview

The ES3A-E3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 50 V DC reverse voltage with 3 A average rectified current in a DO-214AB (SMC) package. The device features fast recovery characteristics with a 30 ns reverse recovery time and is classified as an active product with ROHS3 compliance.

Equivalent and substitute parts are identified to address supply chain requirements, packaging preferences, and application-specific performance needs while maintaining electrical and mechanical compatibility within the specified parameter ranges.

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
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	10 µA @ 50 V	µA
Capacitance @ Vr, F	45 pF @ 4V, 1MHz	pF
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the ES3A-E3/9AT are classified into the following categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 50 V reverse voltage, 3 A average rectified current, 900 mV forward voltage at 3 A, fast recovery characteristics, and DO-214AB (SMC) package configuration. These parts are interchangeable without circuit modification.

Direct Manufacturer Alternatives provide equivalent electrical performance with different technology implementations (such as Schottky diodes) or higher voltage ratings. These parts operate within the same current and package specifications but may exhibit different forward voltage characteristics or reverse leakage behavior.

Manufacturer Recommended Alternatives include parts from different manufacturers that meet the core electrical requirements of 50 V / 3 A operation in surface mount packages. These parts may have minor variations in forward voltage, recovery time, or temperature range but remain functionally compatible.

Key Parameters for Substitution Determination:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Package / Case: Must be DO-214AB or SMC equivalent
Mounting Type: Must be Surface Mount
RoHS Status: Must maintain ROHS3 Compliance

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Product Status
ES3A-E3/9AT	Vishay	50	3	900 @ 3A	Fast Recovery ≤ 500ns	30	10 @ 50V	DO-214AB (SMC)	Active
ES3A-E3/57T	Vishay	50	3	900 @ 3A	Fast Recovery ≤ 500ns	30	10 @ 50V	DO-214AB (SMC)	Active
ES3A-13-F	Diodes Incorporated	50	3	900 @ 3A	Fast Recovery ≤ 500ns	25	10 @ 50V	DO-214AB (SMC)	Active
ES3A	Taiwan Semiconductor Corporation	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 50V	DO-214AB (SMC)	Active
S3A-13-F	Diodes Incorporated	50	3	1150 @ 3A	Standard Recovery >500ns	—	10 @ 50V	DO-214AB (SMC)	Active
STPS3L60S	STMicroelectronics	60	3	700 @ 3A	Fast Recovery ≤ 500ns	—	55 @ 60V	DO-214AB (SMC)	Active
STTH302S	STMicroelectronics	200	3	950 @ 3A	Fast Recovery ≤ 500ns	35	3 @ 200V	DO-214AB (SMC)	Active
SMLJ60S05-TP	Micro Commercial Co	50	6	1000 @ 6A	Standard Recovery >500ns	—	5 @ 50V	DO-214AB (SMC)	Not For New Designs
S10A-TP	Micro Commercial Co	50	10	1200 @ 10A	Standard Recovery >500ns	—	10 @ 50V	DO-214AB (HSMC)	Obsolete

Engineering Selection Recommendations

Direct Substitution (Parametric Equivalents):

ES3A-E3/57T and ES3A-13-F are direct parametric equivalents to ES3A-E3/9AT. Both parts maintain identical 50 V / 3 A specifications with fast recovery characteristics and DO-214AB (SMC) packaging. ES3A-E3/57T is manufactured by Vishay and provides identical electrical performance. ES3A-13-F is manufactured by Diodes Incorporated with a marginally faster reverse recovery time (25 ns versus 30 ns), representing an improvement in switching performance. Both parts carry Active product status and ROHS3 compliance.

Compatible Alternatives with Minor Parameter Variations:

ES3A (Taiwan Semiconductor Corporation) meets the core 50 V / 3 A requirements with fast recovery operation. Forward voltage is specified at 950 mV (50 mV higher than the main part) and reverse recovery time is 35 ns (5 ns longer). This part is suitable for applications where the slightly elevated forward voltage and recovery time are acceptable. Product status is Active with ROHS3 compliance.

S3A-13-F (Diodes Incorporated) operates at 50 V / 3 A but employs standard recovery characteristics (>500 ns) rather than fast recovery. Forward voltage is specified at 1150 mV, representing a 250 mV increase over the main part. This part is suitable only for applications where switching speed is not critical. Product status is Active with ROHS3 compliance.

Higher Voltage Alternative:

STTH302S (STMicroelectronics) provides 200 V reverse voltage rating with identical 3 A current capacity. This part is suitable for applications requiring higher voltage withstand capability. Forward voltage is 950 mV and reverse recovery time is 35 ns. Product status is Active with ROHS3 compliance and maximum junction temperature of 175°C.

Higher Current Alternative:

SMLJ60S05-TP (Micro Commercial Co) provides 6 A average rectified current at 50 V, doubling the current capacity of the main part. This part employs standard recovery characteristics and is marked as Not For New Designs. Use is limited to legacy system support or where higher current capacity is required and switching speed is not critical.

Schottky Technology Alternative:

STPS3L60S (STMicroelectronics) is a Schottky diode rated at 60 V / 3 A with significantly lower forward voltage (700 mV versus 900 mV). This part is suitable for applications where reduced forward voltage drop and associated power dissipation are beneficial. Reverse leakage is higher at 55 µA. Product status is Active with ROHS3 compliance.

Parts Not Recommended:

S10A-TP (Micro Commercial Co) is marked as Obsolete and should not be selected for new designs. SMLJ60S05-TP is marked as Not For New Designs and should be avoided except in legacy system maintenance scenarios.

Frequently Asked Questions (FAQ)

Q: Can ES3A-E3/57T be used as a direct replacement for ES3A-E3/9AT?

A: Yes. ES3A-E3/57T is a parametric equivalent manufactured by Vishay with identical electrical specifications: 50 V reverse voltage, 3 A average rectified current, 900 mV forward voltage at 3 A, 30 ns reverse recovery time, and DO-214AB (SMC) package. The parts are electrically and mechanically interchangeable.

Q: What is the difference between ES3A-13-F and ES3A-E3/9AT?

A: ES3A-13-F is manufactured by Diodes Incorporated and maintains the same 50 V / 3 A electrical specifications with identical forward voltage (900 mV @ 3 A) and DO-214AB (SMC) packaging. The reverse recovery time is 25 ns compared to 30 ns in the main part, representing faster switching performance. Both parts are Active products with ROHS3 compliance.

Q: Can STPS3L60S replace ES3A-E3/9AT in all applications?

A: STPS3L60S is a Schottky diode with different electrical characteristics. While it maintains 3 A current capacity and DO-214AB (SMC) packaging, the forward voltage is significantly lower at 700 mV versus 900 mV. This part is suitable only for applications where the lower forward voltage is acceptable or beneficial. Reverse leakage is higher at 55 µA. Schottky technology may introduce different noise or EMI characteristics in some circuits.

Q: Why is S10A-TP listed if it is obsolete?

A: S10A-TP is included in the substitute list as historical reference for legacy system maintenance. This part should not be selected for new designs. For applications requiring higher current capacity, SMLJ60S05-TP provides 6 A operation, though it is also marked as Not For New Designs.

Q: What are the packaging differences between the substitute parts?

A: All substitute parts listed use DO-214AB or SMC package designations, which are mechanically and electrically compatible. ES3A-E3/9AT and ES3A-E3/57T are supplied in Tape & Reel (TR) packaging. ES3A-13-F and STPS3L60S are supplied in Cut Tape (CT) & Digi-Reel® packaging. These packaging differences do not affect circuit performance but may impact procurement and handling procedures.

Q: Can ES3A (Taiwan Semiconductor Corporation) be used instead of ES3A-E3/9AT?

A: ES3A meets the core 50 V / 3 A specifications with fast recovery characteristics and DO-214AB (SMC) packaging. Forward voltage is 950 mV (50 mV higher) and reverse recovery time is 35 ns (5 ns longer). This part is suitable for applications where these minor parameter variations are acceptable. Product status is Active with ROHS3 compliance.

Q: What is the advantage of STTH302S over ES3A-E3/9AT?

A: STTH302S provides 200 V reverse voltage rating compared to 50 V in the main part. This higher voltage rating is suitable for applications requiring greater voltage withstand capability. Forward voltage and reverse recovery time are comparable. Maximum junction temperature is 175°C. This part should be selected only when the higher voltage rating is required by the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant status, matching the compliance level of ES3A-E3/9AT. All parts also maintain Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: Why does S3A-13-F have higher forward voltage than ES3A-E3/9AT?

A: S3A-13-F employs standard recovery characteristics (>500 ns) rather than fast recovery (≤500 ns). Standard recovery diodes typically exhibit higher forward voltage drop. This part is suitable only for applications where switching speed is not critical and the elevated forward voltage is acceptable.

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