ES3A Equivalent & Substitute Parts

Part Overview

The ES3A is a general-purpose rectifier diode manufactured by onsemi, 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 This part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	10 µA @ 50 V	µA
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50°C to 150°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the ES3A are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 900 mV to 1.15 V @ 3 A
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
Reverse Recovery Time (trr): 20 ns to 50 ns
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 50 V
Operating Temperature - Junction: Minimum -65°C to -50°C; Maximum 150°C or higher

Parts that deviate from mandatory parameters (such as STTH302S with 200 V rating, S10A-TP with 10 A rating, or S5AC-13-F with 5 A rating) are listed as cross-reference alternatives but do not qualify as direct substitutes for applications requiring exact 50 V / 3 A specifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Product Status	Packaging
ES3A	onsemi	50	3	950 @ 3A	Fast Recovery ≤ 500ns	20	10 @ 50V	Not For New Designs	Tape & Reel (TR)
ES3A-13-F	Diodes Incorporated	50	3	900 @ 3A	Fast Recovery ≤ 500ns	25	10 @ 50V	Active	Cut Tape (CT) & Digi-Reel®
ES3A-E3/57T	Vishay General Semiconductor - Diodes Division	50	3	900 @ 3A	Fast Recovery ≤ 500ns	30	10 @ 50V	Active	Tape & Reel (TR)
S3A	Diodes Incorporated	50	3	1150 @ 3A	Standard Recovery > 500ns	2000	10 @ 50V	Obsolete	—
S3A-13-F	Diodes Incorporated	50	3	1150 @ 3A	Standard Recovery > 500ns	—	10 @ 50V	Active	Tape & Reel (TR)
CSFC301-G	Comchip Technology	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 50V	Active	Tape & Reel (TR)
CURC301-G	Comchip Technology	50	3	1000 @ 3A	Fast Recovery ≤ 500ns	50	5 @ 50V	Active	Tape & Reel (TR)
SMLJ60S05-TP	Micro Commercial Co	50	6	1000 @ 6A	Standard Recovery > 500ns	—	5 @ 50V	Not For New Designs	Tape & Reel (TR)
S10A-TP	Micro Commercial Co	50	10	1200 @ 10A	Standard Recovery > 500ns	—	10 @ 50V	Obsolete	Cut Tape (CT) & Digi-Reel®
S5AC-13-F	Diodes Incorporated	50	5	1150 @ 5A	Standard Recovery > 500ns	—	10 @ 50V	Active	Cut Tape (CT) & Digi-Reel®
STTH302S	STMicroelectronics	200	3	950 @ 3A	Fast Recovery ≤ 500ns	35	3 @ 200V	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Direct Substitutes (50 V / 3 A / DO-214AB / Active Status):

The following parts meet all mandatory electrical and mechanical parameters and carry Active product status:

ES3A-13-F (Diodes Incorporated): Fast recovery characteristics with 25 ns reverse recovery time. Forward voltage 900 mV @ 3 A. Available in Cut Tape and Digi-Reel packaging. ROHS3 compliant, MSL 1.
ES3A-E3/57T (Vishay General Semiconductor - Diodes Division): Fast recovery characteristics with 30 ns reverse recovery time. Forward voltage 900 mV @ 3 A. Available in Tape & Reel packaging. ROHS3 compliant, MSL 1.
CSFC301-G (Comchip Technology): Fast recovery characteristics with 35 ns reverse recovery time. Forward voltage 950 mV @ 3 A. Reverse leakage 5 µA @ 50 V. Available in Tape & Reel packaging. ROHS3 compliant, MSL 1.
CURC301-G (Comchip Technology): Fast recovery characteristics with 50 ns reverse recovery time. Forward voltage 1000 mV @ 3 A. Reverse leakage 5 µA @ 50 V. Available in Tape & Reel packaging. ROHS3 compliant, MSL 1.

Functional Alternatives (50 V / 3 A / DO-214AB / Standard Recovery):

S3A-13-F (Diodes Incorporated): Standard recovery diode with 2 µs reverse recovery time. Forward voltage 1150 mV @ 3 A. Active product status. Available in Tape & Reel packaging. ROHS3 compliant, MSL 1. Suitable for applications where fast recovery is not required.

Cross-Reference Parts (Different Current or Voltage Ratings):

S5AC-13-F (Diodes Incorporated): 50 V / 5 A rating. Standard recovery. Active status. Use only when higher current capacity is required.
SMLJ60S05-TP (Micro Commercial Co): 50 V / 6 A rating. Standard recovery. Not For New Designs status. Use only when higher current capacity is required and legacy sourcing is acceptable.
STTH302S (STMicroelectronics): 200 V / 3 A rating. Fast recovery. Active status. Use only when higher voltage rating is required.
S10A-TP (Micro Commercial Co): 50 V / 10 A rating. Standard recovery. Obsolete status. Not recommended for new designs.
S3A (Diodes Incorporated): 50 V / 3 A rating. Standard recovery. Obsolete status. Not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can ES3A-13-F be used as a direct replacement for ES3A?

A: Yes. Both parts share identical voltage (50 V) and current (3 A) ratings, DO-214AB package, and surface mount configuration. ES3A-13-F is manufactured by Diodes Incorporated with Active product status, whereas ES3A (onsemi) is Not For New Designs. Forward voltage differs slightly (900 mV vs. 950 mV @ 3 A), and reverse recovery time is marginally longer (25 ns vs. 20 ns), but both fall within acceptable operating parameters for general-purpose rectification applications.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have reverse recovery times ≤ 500 ns (ES3A: 20 ns, ES3A-13-F: 25 ns, CSFC301-G: 35 ns), making them suitable for high-frequency switching applications. Standard recovery diodes have reverse recovery times > 500 ns (S3A-13-F: 2 µs, S5AC-13-F: unspecified but classified as standard). For low-frequency rectification, standard recovery diodes are acceptable; for switching power supplies and high-frequency circuits, fast recovery types are required.

Q: Can S3A-13-F replace ES3A in all applications?

A: S3A-13-F matches the 50 V / 3 A electrical specifications and DO-214AB package, but differs in recovery speed (standard vs. fast) and forward voltage (1150 mV vs. 950 mV @ 3 A). It is suitable for low-frequency rectification applications where switching speed is not critical. For high-frequency or switching applications, ES3A-13-F, ES3A-E3/57T, CSFC301-G, or CURC301-G are preferred.

Q: Why is STTH302S listed as a substitute if it has a 200 V rating?

A: STTH302S is a cross-reference alternative, not a direct substitute. It maintains the 3 A current rating and DO-214AB package but provides 200 V reverse voltage capability instead of 50 V. It is suitable only for applications requiring higher voltage withstand capability. Using STTH302S in a 50 V circuit is acceptable (over-specification), but it introduces unnecessary cost and may not be optimal for space-constrained designs.

Q: What does "Not For New Designs" mean for ES3A?

A: "Not For New Designs" indicates that onsemi has discontinued active development and promotion of the ES3A. While existing inventory may be available, the manufacturer recommends using alternative parts for new circuit designs. ES3A-13-F, ES3A-E3/57T, CSFC301-G, and CURC301-G are recommended alternatives with Active product status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference carry ROHS3 Compliant status and are suitable for applications requiring RoHS compliance. All parts also carry MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture protection is required during storage or handling.

Q: What is the significance of packaging type (Tape & Reel vs. Cut Tape)?

A: Tape & Reel (TR) packaging is used for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® packaging is used for lower-volume or mixed-component orders. Both formats contain the same component in DO-214AB (SMC) package. Selection depends on procurement volume and assembly equipment compatibility, not electrical performance.

Q: Can I use S5AC-13-F (5 A) instead of ES3A (3 A)?

A: S5AC-13-F is rated for 50 V / 5 A and can handle the 3 A load of an ES3A application. However, it uses standard recovery technology (vs. fast recovery in ES3A) and has a higher forward voltage (1150 mV @ 5 A). Use S5AC-13-F only when higher current capacity is required for the same circuit. For 3 A applications, ES3A-13-F or CSFC301-G are more appropriate.

Q: What is the operating temperature range consideration?

A: ES3A operates from -50°C to 150°C junction temperature. ES3A-13-F and ES3A-E3/57T extend the lower limit to -55°C. S3A and S3A-13-F extend to -65°C. CSFC301-G and CURC301-G specify 150°C maximum without a lower limit. For applications requiring extended low-temperature operation below -50°C, ES3A-13-F, ES3A-E3/57T, S3A, or S3A-13-F are suitable.

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