ES3A R7G Equivalent & Substitute Parts

Part Overview

The ES3A R7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The ES3A R7G features fast recovery characteristics with a reverse recovery time of 35 nanoseconds, forward voltage of 950 mV at 3 A, and operates across a junction temperature range of -55°C to 150°C. The component is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

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)	35	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
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ES3A R7G is determined by 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
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature Range: -55°C to 150°C minimum

Parametric Equivalents are parts from the same manufacturer (Taiwan Semiconductor Corporation) with identical electrical specifications and package type. These include ES3A and ES3AH, where ES3AH adds automotive-grade qualification (AEC-Q101).

Similar Substitutes are parts from alternative manufacturers (Comchip Technology, Diodes Incorporated, Vishay General Semiconductor) that meet the core electrical requirements (50 V, 3 A, DO-214AB package, fast recovery) but may exhibit variations in forward voltage, reverse recovery time, reverse leakage current, or capacitance within acceptable engineering tolerances. These parts are suitable for direct replacement in applications where the specific performance variations do not impact circuit function.

Higher Current Alternatives such as CGRC501-G (5 A rated) are included for applications requiring increased current margin, though they represent a design upgrade rather than a direct substitute.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Product Status
ES3A R7G	Taiwan Semiconductor Corporation	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 50V	DO-214AB (SMC)	Discontinued
ES3A	Taiwan Semiconductor Corporation	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 50V	DO-214AB (SMC)	Active
ES3AH	Taiwan Semiconductor Corporation	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	10 @ 50V	DO-214AB (SMC)	Active
CSFC301-G	Comchip Technology	50	3	950 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 50V	DO-214AB (SMC)	Active
ES3A-13-F	Diodes Incorporated	50	3	900 @ 3A	Fast Recovery ≤ 500ns	25	10 @ 50V	DO-214AB (SMC)	Active
RS3A-13-F	Diodes Incorporated	50	3	1300 @ 3A	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AB (SMC)	Active
RS3A-E3/57T	Vishay General Semiconductor - Diodes Division	50	3	1300 @ 2.5A	Fast Recovery ≤ 500ns	150	10 @ 50V	DO-214AB (SMC)	Active
RS3A-E3/9AT	Vishay General Semiconductor - Diodes Division	50	3	1300 @ 2.5A	Fast Recovery ≤ 500ns	150	10 @ 50V	DO-214AB (SMC)	Active
RS3A-M3/57T	Vishay General Semiconductor - Diodes Division	50	3	1300 @ 2.5A	Fast Recovery ≤ 500ns	150	10 @ 50V	DO-214AB (SMC)	Active
CGRC501-G	Comchip Technology	50	5	1150 @ 5A	Standard Recovery >500ns	—	10 @ 50V	DO-214AB (SMC)	Active
ES3AB-13-F	Diodes Incorporated	50	3	900 @ 3A	Fast Recovery ≤ 500ns	25	10 @ 50V	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

ES3A and ES3AH from Taiwan Semiconductor Corporation are direct parametric equivalents to the ES3A R7G. Both maintain identical electrical specifications (50 V, 3 A, 950 mV forward voltage, 35 ns reverse recovery time) and package configuration (DO-214AB SMC). ES3A is currently active with 17,100 pieces in stock. ES3AH adds automotive-grade qualification per AEC-Q101 with 956 pieces available, suitable for applications requiring automotive compliance.

Alternative Manufacturer Substitutes (Secondary Options):

CSFC301-G from Comchip Technology provides equivalent performance with identical voltage, current, and speed ratings. The reverse leakage current is reduced to 5 µA (versus 10 µA), representing improved performance. This part is active with 1,092 pieces in stock.

ES3A-13-F from Diodes Incorporated meets all core requirements with improved forward voltage (900 mV versus 950 mV) and faster reverse recovery time (25 ns versus 35 ns), both favorable characteristics. This part is active with 10,300 pieces in stock and is available in Cut Tape and Digi-Reel packaging.

RS3A series parts from Diodes Incorporated and Vishay General Semiconductor (RS3A-13-F, RS3A-E3/57T, RS3A-E3/9AT, RS3A-M3/57T) meet voltage and current requirements but exhibit higher forward voltage (1.3 V) and longer reverse recovery time (150 ns). These parts are suitable for applications where the increased forward voltage drop and recovery time do not create circuit performance issues. All variants are active with inventory ranging from 669 to 5,545 pieces.

Higher Current Alternative:

CGRC501-G from Comchip Technology is rated for 5 A (versus 3 A) at 50 V, providing increased current margin. This part uses standard recovery characteristics (>500ns) rather than fast recovery. Selection of this part represents a design upgrade and is appropriate only when increased current capacity is required.

Package Variant:

ES3AB-13-F from Diodes Incorporated is identical to ES3A-13-F except for package type (DO-214AA SMB versus DO-214AB SMC). This part is suitable only if the circuit board layout accommodates SMB package dimensions.

All recommended substitutes are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity) and REACH unaffected status, matching the compliance profile of the original ES3A R7G.

Frequently Asked Questions (FAQ)

Q: Can ES3A be used as a direct replacement for ES3A R7G?

A: Yes. ES3A is a parametric equivalent with identical electrical specifications (50 V, 3 A, 950 mV forward voltage, 35 ns reverse recovery time) and DO-214AB SMC package. The primary difference is product status: ES3A R7G is discontinued while ES3A is active. ES3A is the recommended primary substitute.

Q: What is the difference between ES3A and ES3AH?

A: Both parts are parametric equivalents with identical electrical specifications. ES3AH includes automotive-grade qualification per AEC-Q101 and is designated for automotive applications. Selection depends on application requirements and compliance mandates.

Q: Can I use RS3A-13-F instead of ES3A R7G?

A: RS3A-13-F meets the 50 V voltage and 3 A current requirements and uses the same DO-214AB SMC package. However, it exhibits higher forward voltage (1.3 V versus 950 mV) and longer reverse recovery time (150 ns versus 35 ns). This part is suitable for applications where these performance differences do not impact circuit operation. Verify circuit tolerance to increased forward voltage drop and recovery time before selection.

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

A: Fast recovery diodes (≤500ns reverse recovery time) switch off more quickly, reducing switching losses and noise in high-frequency applications. Standard recovery diodes (>500ns) have slower switching characteristics. The ES3A R7G is fast recovery. CGRC501-G is standard recovery. Selection depends on circuit switching frequency and performance requirements.

Q: Can I use CGRC501-G (5 A) instead of ES3A R7G (3 A)?

A: CGRC501-G meets the 50 V voltage requirement and provides higher current capacity (5 A versus 3 A). However, it uses standard recovery characteristics (>500ns) rather than fast recovery (≤500ns). This part is suitable only if the application requires increased current margin and can tolerate slower switching characteristics. This represents a design upgrade, not a direct substitute.

Q: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?

A: DO-214AB (SMC) and DO-214AA (SMB) are different surface mount package outlines with different footprints and lead configurations. ES3AB-13-F uses DO-214AA (SMB) while ES3A R7G uses DO-214AB (SMC). These packages are not interchangeable without circuit board redesign. Verify package compatibility before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity) and REACH unaffected status, matching the compliance profile of ES3A R7G.

Q: Which substitute offers the best performance match to ES3A R7G?

A: ES3A from Taiwan Semiconductor Corporation is the best performance match, providing identical electrical specifications and package type. ES3A-13-F from Diodes Incorporated offers improved performance with lower forward voltage (900 mV versus 950 mV) and faster reverse recovery time (25 ns versus 35 ns). Both are active with adequate inventory.

Q: Can I mix different substitute parts in the same circuit board?

A: All listed substitutes meet the core electrical requirements (50 V, 3 A, fast recovery, DO-214AB SMC package) and are functionally compatible. However, mixing parts with different forward voltage and reverse recovery time characteristics may introduce circuit performance variations. Consistent part selection across a design is recommended for predictable circuit behavior.

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