Equivalent & Substitute Parts for RS3A-13

Part Overview

The RS3A-13 is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified parameters within acceptable design tolerances.

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 @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the RS3A-13 is determined by the following critical parameters:

Electrical Compatibility Criteria:

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

Compliance Criteria:

RoHS Status: Preference for ROHS3 Compliant alternatives
Product Status: Active or Obsolete status acceptable; Not For New Designs status acceptable for legacy applications

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents (Identical Electrical Specifications) Parts maintaining 50 V reverse voltage, 3 A current rating, and fast recovery characteristics with identical forward voltage specifications.

Category 2: Functional Substitutes (Modified Electrical Specifications) Parts with 50 V reverse voltage and equal or higher current ratings, accommodating design flexibility for applications with current margin requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Product Status	RoHS Status
RS3A-13	Diodes Incorporated	50 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AB, SMC	Discontinued	RoHS non-compliant
RS3A-13-F	Diodes Incorporated	50 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AB, SMC	Active	ROHS3 Compliant
ES3A	Taiwan Semiconductor Corporation	50 V	3 A	950 mV @ 3 A	Fast Recovery ≤ 500ns	35 ns	10 µA @ 50 V	DO-214AB, SMC	Active	ROHS3 Compliant
ES3A-E3/57T	Vishay General Semiconductor - Diodes Division	50 V	3 A	900 mV @ 3 A	Fast Recovery ≤ 500ns	30 ns	10 µA @ 50 V	DO-214AB, SMC	Active	ROHS3 Compliant
S3A	Diodes Incorporated	50 V	3 A	1.15 V @ 3 A	Standard Recovery >500ns	2 µs	10 µA @ 50 V	DO-214AB, SMC	Obsolete	ROHS3 Compliant
SMLJ60S05-TP	Micro Commercial Co	50 V	6 A	1 V @ 6 A	Standard Recovery >500ns	—	5 µA @ 50 V	DO-214AB, SMC	Not For New Designs	ROHS3 Compliant
S10A-TP	Micro Commercial Co	50 V	10 A	1.2 V @ 10 A	Standard Recovery >500ns	—	10 µA @ 50 V	DO-214AB, SMC	Obsolete	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: RS3A-13-F

RS3A-13-F is the direct parametric equivalent of RS3A-13, maintaining identical electrical specifications (50 V, 3 A, 1.3 V forward voltage, 150 ns recovery time) while offering Active product status and ROHS3 compliance. This part is available in Tape & Reel packaging with 5545 units in stock. Selection of RS3A-13-F eliminates all compatibility concerns and provides regulatory compliance for new designs.

Secondary Recommendation: ES3A-E3/57T

ES3A-E3/57T (Vishay General Semiconductor - Diodes Division) maintains the 50 V / 3 A electrical rating with improved performance characteristics: 900 mV forward voltage (versus 1.3 V), 30 ns reverse recovery time (versus 150 ns), and Active product status with ROHS3 compliance. This part is supplied in Tape & Reel format with 5250 units in stock. Selection is appropriate for applications where reduced forward voltage drop and faster recovery characteristics provide design benefits.

Tertiary Recommendation: ES3A

ES3A (Taiwan Semiconductor Corporation) provides equivalent 50 V / 3 A electrical rating with improved performance: 950 mV forward voltage and 35 ns reverse recovery time. Active product status and ROHS3 compliance are confirmed. Inventory availability is 17100 units. This part is suitable for applications requiring performance enhancement over the original RS3A-13 specification.

Alternative Consideration: S3A

S3A (Diodes Incorporated) maintains 50 V / 3 A rating with 1.15 V forward voltage. Product status is Obsolete with ROHS3 compliance confirmed. Recovery speed is Standard (>500ns) rather than Fast Recovery. This part is acceptable for legacy applications where recovery speed is not a critical design parameter. Inventory is 864 units.

Higher Current Alternatives: SMLJ60S05-TP and S10A-TP

SMLJ60S05-TP (6 A rating) and S10A-TP (10 A rating) provide increased current capacity at 50 V reverse voltage. Both parts have Standard Recovery speed classification. SMLJ60S05-TP is marked Not For New Designs; S10A-TP is Obsolete. These parts are suitable only for applications where the original 3 A specification is insufficient and design margin for current is required.

Frequently Asked Questions (FAQ)

Q: Can RS3A-13-F be used as a direct replacement for RS3A-13?

A: Yes. RS3A-13-F is a parametric equivalent with identical electrical specifications: 50 V reverse voltage, 3 A current rating, 1.3 V forward voltage at 3 A, and 150 ns reverse recovery time. The primary difference is product status (Active versus Discontinued) and RoHS compliance (ROHS3 versus non-compliant). Mechanical compatibility is confirmed through identical DO-214AB SMC packaging.

Q: What is the difference between Fast Recovery and Standard Recovery speed classifications?

A: Fast Recovery diodes have reverse recovery time ≤ 500 ns and are specified for currents > 200 mA. Standard Recovery diodes have reverse recovery time > 500 ns. RS3A-13 specifies Fast Recovery with 150 ns trr. Substitutes ES3A-E3/57T (30 ns) and ES3A (35 ns) offer faster recovery. Substitutes S3A, SMLJ60S05-TP, and S10A-TP specify Standard Recovery (>500ns). Selection depends on application switching frequency and EMI requirements.

Q: Are all substitute parts available in the same packaging format?

A: No. RS3A-13 packaging is not specified (bulk). RS3A-13-F is supplied in Tape & Reel (TR). ES3A-E3/57T is supplied in Tape & Reel (TR). ES3A packaging is not specified. S3A packaging is not specified. SMLJ60S05-TP is supplied in Tape & Reel (TR). S10A-TP is supplied in Cut Tape (CT) & Digi-Reel. All parts use DO-214AB or SMC package case, confirming mechanical compatibility for PCB assembly.

Q: Which substitute offers the lowest forward voltage drop?

A: ES3A-E3/57T offers the lowest forward voltage at 900 mV @ 3 A, compared to RS3A-13 at 1.3 V @ 3 A. ES3A provides 950 mV @ 3 A. Lower forward voltage reduces power dissipation and heat generation in the diode, beneficial for high-frequency or high-current applications.

Q: Can I use a higher current-rated diode (SMLJ60S05-TP or S10A-TP) in place of RS3A-13?

A: Yes, from an electrical standpoint. Both parts maintain 50 V reverse voltage rating and exceed the 3 A current requirement. However, SMLJ60S05-TP is marked Not For New Designs, and S10A-TP is Obsolete. Both specify Standard Recovery speed (>500ns) rather than Fast Recovery. Use of higher current-rated parts is acceptable only when design margin for current is required and recovery speed is not a critical parameter.

Q: What is the significance of RoHS compliance status?

A: RS3A-13 is RoHS non-compliant. All substitute parts listed (RS3A-13-F, ES3A, ES3A-E3/57T, S3A, SMLJ60S05-TP, S10A-TP) are ROHS3 Compliant. RoHS3 compliance indicates the part does not contain restricted substances (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers) above specified thresholds. Selection of ROHS3-compliant substitutes is required for applications subject to RoHS regulations or customer requirements.

Q: Is moisture sensitivity a concern for these parts?

A: All parts listed specify Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity. These parts do not require special moisture-controlled storage or handling procedures and can be stored under standard industrial conditions.

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