ES1LG R3G Equivalent & Substitute Parts

Part Overview

The ES1LG R3G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The device features fast recovery characteristics with a reverse recovery time of 35 nanoseconds and operates across a junction temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ES1LG R3G is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C (or higher)

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A or lower
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 5 µA @ 400 V
RoHS Status: ROHS3 Compliant

Parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalents: Parts meeting all primary equivalence criteria with identical or superior electrical performance characteristics.

Direct Manufacturers: Parts from alternative manufacturers with matching specifications and package designation.

Similar Parts: Components with the same voltage and current ratings but differing in secondary characteristics such as recovery time or forward voltage, suitable for applications with relaxed speed requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Speed	Package	Temp Range [°C]	Product Status
ES1LG R3G	Taiwan Semiconductor Corporation	400	1	1.3 @ 1 A	35	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Discontinued at DiGi Electronics
ES1G	Good-Ark Semiconductor	400	1	1.3 @ 1 A	35	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 125	Active
ES1GH	Taiwan Semiconductor Corporation	400	1	1.3 @ 1 A	35	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active
HS1G	SURGE	400	1	1.3 @ 1 A	50	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active
RS1G	Taiwan Semiconductor Corporation	400	1	1.3 @ 1 A	150	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active
RS1G R3G	Taiwan Semiconductor Corporation	400	1	1.3 @ 1 A	150	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Discontinued at DiGi Electronics
RS1GH	Taiwan Semiconductor Corporation	400	1	1.3 @ 1 A	150	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active
CSFA104-G	Comchip Technology	400	1	1.25 @ 1 A	35	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active
CGRA4004-G	Comchip Technology	400	1	1.1 @ 1 A	—	Standard Recovery >500ns	DO-214AC, SMA	-55 to 150	Active
ES1G-13-F	Diodes Incorporated	400	1	1.25 @ 1 A	25	Fast Recovery ≤ 500ns	DO-214AC, SMA	-55 to 150	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

ES1GH (Taiwan Semiconductor Corporation) is the primary equivalent for ES1LG R3G. This part maintains identical electrical specifications including 400 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage at 1 A, and 35 nanosecond reverse recovery time. The operating temperature range extends to 150°C, matching the original part. ES1GH is currently active in production and carries AEC-Q101 automotive qualification, providing enhanced reliability documentation. RoHS3 compliance and REACH unaffected status are maintained.

Secondary Recommendations:

RS1GH (Taiwan Semiconductor Corporation) provides full electrical equivalence with identical voltage and current ratings, operating temperature range, and RoHS3 compliance. The reverse recovery time of 150 nanoseconds represents a trade-off; this part is suitable for applications where faster switching is not critical. AEC-Q101 automotive qualification is included.

ES1G-13-F (Diodes Incorporated) offers fast recovery characteristics with 25 nanosecond reverse recovery time, superior to the original part. Forward voltage is 1.25 V at 1 A, within acceptable tolerance. This part is actively produced with high inventory availability and full RoHS3 compliance.

CSFA104-G (Comchip Technology) matches the original 35 nanosecond reverse recovery time with forward voltage of 1.25 V at 1 A. All voltage and current ratings are identical. Active production status and RoHS3 compliance are confirmed.

Not Recommended for Direct Substitution:

CGRA4004-G exhibits standard recovery characteristics (>500 ns) rather than fast recovery, making it unsuitable for applications requiring the fast switching performance of the original ES1LG R3G.

HS1G (SURGE) has a reverse recovery time of 50 nanoseconds, which is slower than the original 35 nanoseconds. REACH status is listed as vendor undefined, introducing compliance uncertainty.

Frequently Asked Questions (FAQ)

Q: Can ES1GH directly replace ES1LG R3G in all applications?

A: ES1GH is a direct parametric equivalent with identical voltage (400 V), current (1 A), forward voltage (1.3 V @ 1 A), and reverse recovery time (35 ns) specifications. The operating temperature range of -55°C to 150°C matches the original part. ES1GH is suitable for direct replacement in all applications where ES1LG R3G was specified.

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

A: Recovery speed is determined by reverse recovery time (trr). Fast recovery diodes have trr ≤ 500 ns and are specified for applications requiring rapid switching transitions. Standard recovery diodes have trr > 500 ns and are used in lower-frequency applications. The ES1LG R3G specifies fast recovery with 35 ns trr. Substitutes must maintain this classification unless application requirements explicitly permit slower recovery.

Q: Are there inventory advantages to selecting alternative manufacturers?

A: Yes. ES1G (Good-Ark Semiconductor) has 415,300 pieces in stock. ES1G-13-F (Diodes Incorporated) has 420,300 pieces available. CGRA4004-G (Comchip Technology) has 20,100 pieces. These inventory levels exceed the 855 pieces available for the original ES1LG R3G, providing supply chain advantages for high-volume production.

Q: Does forward voltage variation affect circuit performance?

A: Forward voltage differences of 0.05 V to 0.15 V between substitutes (ranging from 1.1 V to 1.3 V @ 1 A) are within typical design tolerances for rectifier applications. However, designs with tight voltage regulation or high-precision requirements should verify compatibility through circuit simulation or prototype testing.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts carrying this qualification (ES1GH and RS1GH) have undergone enhanced reliability testing and are suitable for automotive applications. Non-qualified parts are suitable for general industrial and consumer applications.

Q: Can I use RS1GH instead of ES1GH if cost is a factor?

A: RS1GH has identical voltage, current, and temperature specifications but features a reverse recovery time of 150 ns compared to ES1GH's 35 ns. This slower recovery is acceptable for applications operating at lower switching frequencies or where switching losses are not critical. Both parts carry AEC-Q101 qualification and RoHS3 compliance.

Q: What packaging options are available?

A: The ES1LG R3G is supplied in Cut Tape (CT) packaging. Equivalent parts are available in multiple packaging formats: Cut Tape (CT), Tape & Reel (TR), Digi-Reel®, and Bag. Selection should match production equipment requirements. Tape & Reel packaging (ES1GH, RS1GH, CSFA104-G, ES1G-13-F) is standard for automated assembly.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended substitute parts carry ROHS3 Compliant status. This ensures compliance with European Union Restriction of Hazardous Substances regulations and is required for most commercial and industrial applications.

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