RS3A-E3/57T Equivalent & Substitute Parts

Part Overview

The RS3A-E3/57T 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 reverse recovery time of 150 ns and is classified as Active product status with full RoHS3 compliance.

Substitute parts are identified to address component availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility within the defined 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	1.3 V @ 2.5 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the RS3A-E3/57T are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-214AB, SMC (surface mount compatibility)
Mounting Type: Surface Mount
RoHS3 Compliance: Required

Secondary Compatibility Factors:

Technology type (Standard or Schottky)
Forward voltage characteristics
Reverse recovery time classification
Operating temperature range
Product status (Active preferred, Obsolete noted)

Parts meeting the primary criteria are classified as direct substitutes. Parts exceeding current rating or voltage rating are noted as functional alternatives with design considerations. Parts with different technology types (Schottky vs. Standard) are identified separately due to distinct electrical behavior.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns]	Package	Status	RoHS3
RS3A-E3/57T	Vishay	50	3	1.3 @ 2.5A	Fast Recovery ≤ 500ns	150	DO-214AB (SMC)	Active	Yes
ES3A	Taiwan Semiconductor	50	3	0.95 @ 3A	Fast Recovery ≤ 500ns	35	DO-214AB (SMC)	Active	Yes
RS3A-13-F	Diodes Incorporated	50	3	1.3 @ 3A	Fast Recovery ≤ 500ns	150	DO-214AB (SMC)	Active	Yes
S3A-13-F	Diodes Incorporated	50	3	1.15 @ 3A	Standard Recovery > 500ns	-	DO-214AB (SMC)	Active	Yes
S3A	Diodes Incorporated	50	3	1.15 @ 3A	Standard Recovery > 500ns	2000	DO-214AB (SMC)	Obsolete	Yes
STPS3L60S	STMicroelectronics	60	3	0.7 @ 3A	Fast Recovery ≤ 500ns	-	DO-214AB (SMC)	Active	Yes
STTH302S	STMicroelectronics	200	3	0.95 @ 3A	Fast Recovery ≤ 500ns	35	DO-214AB (SMC)	Active	Yes
S10A-TP	Micro Commercial Co	50	10	1.2 @ 10A	Standard Recovery > 500ns	-	DO-214AB (HSMC)	Obsolete	Yes

Engineering Selection Recommendations

Direct Substitutes (Recommended for Pin-Compatible Replacement):

The following parts maintain identical voltage and current ratings with the RS3A-E3/57T and are suitable for direct substitution in applications requiring 50 V, 3 A rectification:

ES3A (Taiwan Semiconductor): Active status. Identical voltage and current specifications. Forward voltage is lower (0.95 V vs. 1.3 V), resulting in reduced power dissipation. Reverse recovery time is significantly faster (35 ns vs. 150 ns). Full RoHS3 compliance and unlimited moisture sensitivity level.
RS3A-13-F (Diodes Incorporated): Active status. Identical electrical specifications to the main part. Same forward voltage (1.3 V @ 3A) and reverse recovery time (150 ns). Operates across extended temperature range (-65°C to 150°C). Full RoHS3 compliance.

Functional Alternatives (Voltage or Current Derating):

STPS3L60S (STMicroelectronics): Schottky technology with 60 V rating (10 V higher than main part). 3 A current rating matches specification. Lower forward voltage (0.7 V) reduces power dissipation. Active status with full compliance. Schottky technology exhibits different reverse leakage characteristics (55 µA vs. 10 µA).
STTH302S (STMicroelectronics): 200 V rating provides significant voltage margin above 50 V requirement. 3 A current rating matches specification. Fast recovery characteristics (35 ns). Active status. Suitable for applications requiring higher voltage headroom.

Obsolete Parts (Not Recommended for New Designs):

S3A (Diodes Incorporated): Obsolete status. Standard recovery speed (> 500ns) vs. fast recovery of main part. Limited inventory (864 pcs).
S10A-TP (Micro Commercial Co): Obsolete status. 10 A rating exceeds requirement. Standard recovery speed. Limited inventory (2203 pcs).

Frequently Asked Questions (FAQ)

Q: Can the ES3A replace the RS3A-E3/57T in all applications?

A: The ES3A meets the primary electrical requirements (50 V, 3 A, DO-214AB package). The lower forward voltage (0.95 V vs. 1.3 V) and faster reverse recovery time (35 ns vs. 150 ns) are advantageous for power efficiency and switching performance. Verify application-specific requirements for reverse recovery time sensitivity before substitution.

Q: What is the difference between the RS3A-13-F and S3A-13-F?

A: Both parts are manufactured by Diodes Incorporated in DO-214AB (SMC) packages with 50 V, 3 A ratings. The RS3A-13-F features fast recovery speed (≤ 500ns, 150 ns trr) while the S3A-13-F uses standard recovery speed (> 500ns, 2 µs trr). The RS3A-13-F is the preferred substitute for the main part due to matching speed classification. The S3A-13-F is suitable only for applications where recovery speed is not critical.

Q: Why is STPS3L60S listed as a substitute if it uses Schottky technology?

A: The STPS3L60S meets the mechanical (DO-214AB package) and primary electrical requirements (3 A current, voltage rating exceeds 50 V minimum). Schottky diodes exhibit lower forward voltage drop and faster switching but have higher reverse leakage current (55 µA vs. 10 µA). Schottky substitution is valid only for applications where these characteristics are acceptable or beneficial.

Q: Can I use STTH302S as a direct replacement?

A: The STTH302S is mechanically compatible (DO-214AB package, 3 A rating) but operates at 200 V, significantly above the 50 V requirement. This part is suitable only for applications where higher voltage rating is required or where the 50 V specification is a minimum rather than a nominal value. Using 200 V devices in 50 V circuits introduces unnecessary cost and may affect circuit performance.

Q: What does "Obsolete" status mean for S3A and S10A-TP?

A: Obsolete status indicates these parts are no longer in active production. While limited inventory may be available, long-term supply cannot be guaranteed. New designs should not incorporate obsolete parts. Existing designs using these parts should transition to active-status alternatives such as RS3A-13-F or ES3A.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference maintain RoHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the significance of the DO-214AB (HSMC) package designation for S10A-TP?

A: The HSMC designation indicates a higher current variant of the standard SMC package, designed to accommodate the 10 A rating. While mechanically similar to DO-214AB (SMC), the HSMC variant has enhanced thermal characteristics. This part is not recommended as a substitute due to obsolete status and current rating mismatch.

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