Equivalent & Substitute Parts for S3A-E3/9AT

Part Overview

The S3A-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 part is classified as Active product status with standard recovery characteristics and is RoHS3 compliant.

Equivalent and substitute parts are identified to address inventory availability, supply chain continuity, and design flexibility while maintaining electrical and mechanical compatibility within the specified parameter ranges for this rectifier diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	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 @ 50 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S3A-E3/9AT are grouped based on electrical parameter compatibility within the rectifier diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 50 V or higher
Current - Average Rectified (Io): 3 A or higher
Package / Case: DO-214AB or SMC equivalent
Mounting Type: Surface Mount
Operating Temperature Range: Minimum -55°C to 150°C
RoHS Status: ROHS3 Compliant

Parametric Equivalent: Parts with identical electrical specifications and the same base product number (S3A) from the same manufacturer.

Direct Manufacturer Equivalent: Parts from alternative manufacturers with compatible voltage and current ratings, including Schottky technology variants with enhanced performance characteristics.

Upgrade Equivalent: Parts with improved specifications (lower forward voltage, faster recovery time, extended temperature range) from alternative manufacturers.

Manufacturer Recommended Equivalent: Parts explicitly listed as substitutes in manufacturer documentation, offering performance enhancements or alternative sourcing options.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Technology	trr [µs/ns]	Package	Product Status	Inventory [Pcs]
S3A-E3/9AT	Vishay General Semiconductor	50	3	1.15 @ 2.5 A	Standard	2.5 µs	DO-214AB (SMC)	Active	775
S3A-E3/57T	Vishay General Semiconductor	50	3	1.15 @ 2.5 A	Standard	2.5 µs	DO-214AB (SMC)	Active	15100
STPS3L60S	STMicroelectronics	60	3	0.7 @ 3 A	Schottky	≤ 500 ns	DO-214AB (SMC)	Active	25050
S3A-13-F	Diodes Incorporated	50	3	1.15 @ 3 A	Standard	> 500 ns	DO-214AB (SMC)	Active	15200
ES3A	Taiwan Semiconductor Corporation	50	3	0.95 @ 3 A	Standard	35 ns	DO-214AB (SMC)	Active	17100
ES3A-13-F	Diodes Incorporated	50	3	0.9 @ 3 A	Standard	25 ns	DO-214AB (SMC)	Active	10300
S10A-TP	Micro Commercial Co	50	10	1.2 @ 10 A	Standard	> 500 ns	DO-214AB (HSMC)	Obsolete	2203
SMLJ60S05-TP	Micro Commercial Co	50	6	1.0 @ 6 A	Standard	> 500 ns	DO-214AB (SMC)	Not For New Designs	12800

Engineering Selection Recommendations

Parametric Equivalent (S3A-E3/57T): This part is the direct parametric equivalent from Vishay General Semiconductor with identical electrical specifications. Selection is appropriate for direct replacement with higher inventory availability (15,100 pcs vs. 775 pcs). Both parts maintain Active product status and ROHS3 compliance.

Direct Manufacturer Equivalent (STPS3L60S): The STMicroelectronics STPS3L60S is a Schottky diode variant with 60 V reverse voltage rating and superior forward voltage characteristics (0.7 V vs. 1.15 V). This part is suitable for applications requiring lower power dissipation and faster switching. Active product status and ROHS3 compliance are maintained. Higher inventory availability (25,050 pcs) supports supply chain continuity.

Upgrade Equivalent (S3A-13-F): The Diodes Incorporated S3A-13-F maintains 50 V / 3 A specifications with extended operating temperature range (-65°C to 150°C vs. -55°C to 150°C). Active product status and ROHS3 compliance are confirmed. Inventory availability is 15,200 pcs.

Manufacturer Recommended Equivalent (ES3A): The Taiwan Semiconductor Corporation ES3A offers improved forward voltage (0.95 V @ 3 A) and significantly faster recovery time (35 ns vs. 2.5 µs). This part is suitable for high-frequency applications. Active product status and ROHS3 compliance are maintained with 17,100 pcs inventory.

Manufacturer Recommended Equivalent (ES3A-13-F): The Diodes Incorporated ES3A-13-F provides the lowest forward voltage (0.9 V @ 3 A) and fastest recovery time (25 ns) among all substitutes. This part is optimal for efficiency-critical designs. Active product status and ROHS3 compliance are confirmed with 10,300 pcs inventory.

Not Recommended for New Designs: S10A-TP (Obsolete status) and SMLJ60S05-TP (Not For New Designs status) are not suitable for new circuit implementations due to product lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can S3A-E3/57T be used as a direct replacement for S3A-E3/9AT?

A: Yes. The S3A-E3/57T is a parametric equivalent with identical voltage (50 V), current (3 A), forward voltage (1.15 V @ 2.5 A), recovery time (2.5 µs), and package specifications (DO-214AB SMC). Both parts are manufactured by Vishay General Semiconductor and maintain Active product status with ROHS3 compliance.

Q: What is the difference between standard recovery and Schottky diodes in this comparison?

A: The STPS3L60S is a Schottky diode with fast recovery characteristics (≤ 500 ns) and lower forward voltage (0.7 V @ 3 A) compared to the standard recovery S3A-E3/9AT (2.5 µs, 1.15 V @ 2.5 A). Schottky diodes are suitable for high-frequency switching applications and reduce power dissipation. The 60 V reverse voltage rating of the STPS3L60S provides additional design margin over the 50 V specification.

Q: Are all substitute parts available in the same DO-214AB package?

A: All substitute parts are available in DO-214AB or SMC equivalent packages suitable for surface mount assembly. The S10A-TP uses a DO-214AB (HSMC) variant, which is a higher current version of the same package family. Package compatibility is maintained across all recommended substitutes.

Q: Which substitute part offers the best performance improvement?

A: The ES3A-13-F from Diodes Incorporated provides the most significant performance improvements with the lowest forward voltage (0.9 V @ 3 A) and fastest recovery time (25 ns). This part is optimal for applications requiring maximum efficiency and high-frequency operation while maintaining 50 V / 3 A electrical specifications.

Q: Can higher current-rated parts like SMLJ60S05-TP (6 A) or S10A-TP (10 A) be used as substitutes?

A: Higher current-rated parts are electrically compatible for applications requiring the S3A-E3/9AT specifications. However, S10A-TP carries Obsolete product status and SMLJ60S05-TP is marked Not For New Designs. For new circuit designs, use only Active status parts: S3A-E3/57T, STPS3L60S, S3A-13-F, ES3A, or ES3A-13-F.

Q: What is the significance of the operating temperature range difference in S3A-13-F?

A: The S3A-13-F from Diodes Incorporated extends the minimum operating temperature to -65°C compared to -55°C for the S3A-E3/9AT. This provides additional design margin for applications operating in extreme cold environments. The maximum temperature remains 150°C for both parts.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, ensuring compatibility with environmental and regulatory requirements equivalent to the S3A-E3/9AT.

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