ES3A-E3/51T Equivalent & Substitute Parts

Part Overview

The ES3A-E3/51T 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 design support and procurement continuity. The diode features fast recovery characteristics with a reverse recovery time of 30 ns and operates across a junction temperature range of -55°C to 150°C. Identification of 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
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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ES3A-E3/51T is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 900 mV @ 3 A (or equivalent within standard tolerance)
Reverse Recovery Time (trr): 30 ns (or faster)
Current - Reverse Leakage @ Vr: 10 µA @ 50 V (or lower)
Capacitance @ Vr, F: 45 pF @ 4V, 1MHz (or equivalent)

Parts are grouped into two categories:

Category 1: Parametric Equivalents (Vishay ES3A Series) These parts maintain identical electrical specifications and are manufactured by the same supplier. Differences exist only in packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete).

Category 2: Manufacturer-Recommended Alternatives These parts meet the primary substitution criteria but may exhibit variations in secondary parameters such as forward voltage, reverse recovery time, or capacitance. These alternatives are from different manufacturers and are suitable for applications where the primary criteria are met.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Status	Packaging Format
ES3A-E3/51T	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Obsolete	Bulk
ES3A-E3/57T	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3A-E3/9AT	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3A-M3/57T	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3A-M3/9AT	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3AHE3_A/H	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3AHE3_A/I	Vishay	50	3	900 @ 3A	30	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel
ES3A	Taiwan Semiconductor Corporation	50	3	950 @ 3A	35	10 @ 50V	DO-214AB, SMC	Active	Bulk
S3A-13-F	Diodes Incorporated	50	3	1150 @ 3A	—	10 @ 50V	DO-214AB, SMC	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: Vishay ES3A-E3/57T

The ES3A-E3/57T is the direct parametric equivalent to the obsolete ES3A-E3/51T. It maintains identical electrical specifications across all critical parameters and is manufactured by the same supplier. The only difference is packaging format: ES3A-E3/57T is supplied in Tape & Reel format with Active product status. This part is recommended for immediate replacement in new designs and ongoing production.

Alternative Equivalents: Vishay ES3A Series (ES3A-E3/9AT, ES3A-M3/57T, ES3A-M3/9AT)

These Vishay parts provide identical electrical performance to the main part and are all Active status. Selection among these alternatives depends on packaging and reel format requirements specific to manufacturing processes. All maintain the same 50 V, 3 A, 30 ns reverse recovery time specifications.

Automotive-Grade Options: ES3AHE3_A/H and ES3AHE3_A/I

Both parts are AEC-Q101 qualified automotive-grade diodes with identical electrical specifications to the main part. These are suitable for applications requiring automotive qualification and are Active status with Tape & Reel packaging.

Cross-Manufacturer Alternative: Taiwan Semiconductor Corporation ES3A

The Taiwan Semiconductor Corporation ES3A meets the primary substitution criteria (50 V, 3 A, DO-214AB package) with Active product status and high inventory availability (17,100 pcs). Secondary parameters show minor variations: forward voltage of 950 mV (versus 900 mV) and reverse recovery time of 35 ns (versus 30 ns). This part is suitable for applications where these parameter variations are acceptable.

Secondary Alternative: Diodes Incorporated S3A-13-F

The S3A-13-F meets primary substitution criteria with 50 V, 3 A rating and DO-214AB package. Forward voltage is specified at 1150 mV @ 3 A, representing a higher value than the main part. This part is Active status with high inventory (15,200 pcs) and is suitable for applications where the higher forward voltage drop is acceptable.

Not Recommended: S10A-TP

The S10A-TP is rated for 10 A average rectified current, exceeding the 3 A specification of the main part. This part is Obsolete status and does not meet substitution criteria.

Not Recommended: SMLJ60S05-TP

The SMLJ60S05-TP is rated for 6 A average rectified current, exceeding the 3 A specification of the main part. This part is classified as Not For New Designs and does not meet substitution criteria.

Frequently Asked Questions (FAQ)

Q: Can I use ES3A-E3/57T as a direct replacement for ES3A-E3/51T?

A: Yes. The ES3A-E3/57T is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel versus bulk). Both parts are rated for 50 V, 3 A, with 900 mV forward voltage and 30 ns reverse recovery time.

Q: What is the difference between ES3A-E3/57T and ES3A-M3/57T?

A: Both parts are parametric equivalents with identical electrical specifications. The difference lies in the manufacturing code designation within the Vishay ES3A series. Both are Active status and suitable for replacement.

Q: Are the automotive-grade parts (ES3AHE3_A/H and ES3AHE3_A/I) interchangeable with the standard ES3A-E3/51T?

A: Yes, from an electrical standpoint. Both automotive-grade parts maintain identical electrical specifications (50 V, 3 A, 900 mV, 30 ns). The automotive-grade designation indicates AEC-Q101 qualification, which is an additional certification. Use automotive-grade parts when AEC-Q101 qualification is required.

Q: Why does the Taiwan Semiconductor Corporation ES3A show different forward voltage (950 mV) and reverse recovery time (35 ns)?

A: These are normal manufacturing variations within the 50 V, 3 A diode category. The ES3A from Taiwan Semiconductor Corporation meets the primary substitution criteria but exhibits slightly different secondary electrical characteristics. This part is suitable for applications where these parameter variations are acceptable.

Q: Can I use the Diodes Incorporated S3A-13-F with its higher forward voltage (1150 mV)?

A: The S3A-13-F meets the primary substitution criteria (50 V, 3 A, DO-214AB package) but exhibits higher forward voltage than the main part. Use this part only in applications where the higher forward voltage drop does not negatively impact circuit performance or thermal management.

Q: Why are S10A-TP and SMLJ60S05-TP not suitable substitutes?

A: The S10A-TP is rated for 10 A and the SMLJ60S05-TP is rated for 6 A, both exceeding the 3 A specification of the main part. These parts do not meet the primary substitution criteria for average rectified current.

Q: What packaging formats are available for the Vishay ES3A equivalents?

A: Vishay offers the ES3A series in Tape & Reel (TR) format for all Active status parts (ES3A-E3/57T, ES3A-E3/9AT, ES3A-M3/57T, ES3A-M3/9AT, ES3AHE3_A/H, ES3AHE3_A/I). The original ES3A-E3/51T was supplied in bulk format but is now obsolete.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the main part.

Q: Which substitute part has the highest inventory availability?

A: Taiwan Semiconductor Corporation ES3A has the highest inventory with 17,100 pcs in stock, followed by Diodes Incorporated S3A-13-F with 15,200 pcs.

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