S2GA-13 Equivalent & Substitute Parts

Part Overview

The S2GA-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 400 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMA package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter tolerances for 400 V, 1.5 A rectification applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Capacitance @ Vr, F	20	pF @ 4V, 1MHz
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the S2GA-13 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain 400 V DC reverse voltage (Vr) maximum to ensure equivalent blocking capability.

Current Rating: Substitute parts rated at 1.5 A average rectified current (Io) are direct equivalents. Parts rated at 1 A or 2 A represent functional alternatives with reduced or increased current capacity, respectively, and are suitable only where circuit design permits.

Package Type: All candidates must use DO-214AC (SMA) surface mount package to ensure mechanical and thermal compatibility with existing PCB layouts.

Forward Voltage: Forward voltage drop (Vf) at rated current determines power dissipation characteristics. Variations within 0.1 to 0.5 V are acceptable in most applications but must be evaluated against thermal and efficiency requirements.

Recovery Speed: Standard recovery (>500 ns) and fast recovery (≤500 ns) diodes are functionally interchangeable in rectification circuits, though fast recovery types offer reduced switching losses in high-frequency applications.

Temperature Range: Operating temperature range must meet or exceed the application's thermal requirements. The S2GA-13 operates from -65°C to 150°C; substitutes with narrower ranges may be acceptable depending on system thermal environment.

Compliance Status: RoHS3 compliance is required for new designs and regulated applications. The original S2GA-13 is RoHS non-compliant; equivalent and substitute parts with RoHS3 compliance are preferred for ongoing production.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	Package	Temp Range [°C]	RoHS Status	Product Status
S2GA-13	Diodes Incorporated	400	1.5	1.15 @ 1.5 A	Standard >500ns	5 @ 400 V	DO-214AC, SMA	-65 to 150	RoHS non-compliant	Discontinued
S2GA-13-F	Diodes Incorporated	400	1.5	1.15 @ 1.5 A	Standard >500ns	5 @ 400 V	DO-214AC, SMA	-65 to 150	ROHS3 Compliant	Active
BYG20G-E3/TR	Vishay General Semiconductor	400	1.5	1.4 @ 1.5 A	Fast ≤500ns	1 @ 400 V	DO-214AC, SMA	-55 to 150	ROHS3 Compliant	Active
ES1G	Good-Ark Semiconductor	400	1.0	1.3 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-214AC, SMA	-55 to 125	ROHS3 Compliant	Active
NRVA4004T3G	onsemi	400	1.0	1.1 @ 1 A	Standard >500ns	10 @ 400 V	DO-214AC, SMA	-55 to 175	ROHS3 Compliant	Not For New Designs
RF201L4SDDTE25	Rohm Semiconductor	400	1.5	1.2 @ 1.5 A	Fast ≤500ns	1 @ 400 V	DO-214AC, SMA	—	ROHS3 Compliant	Active
RFN2L4SDDTE25	Rohm Semiconductor	400	1.5	1.2 @ 1.5 A	Fast ≤500ns	1 @ 400 V	DO-214AC, SMA	—	ROHS3 Compliant	Active
RR2L4SDDTE25	Rohm Semiconductor	400	2.0	1.1 @ 2 A	Standard >500ns	10 @ 400 V	DO-214AC, SMA	—	ROHS3 Compliant	Not For New Designs
S2GA	Taiwan Semiconductor Corporation	400	1.5	1.1 @ 1.5 A	Standard >500ns	5 @ 400 V	DO-214AC, SMA	-55 to 150	ROHS3 Compliant	Active
STTH1R04A	STMicroelectronics	400	1.0	1.5 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-214AC, SMA	—	ROHS3 Compliant	Active
STTH1R04AY	STMicroelectronics	400	1.0	1.6 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-214AC, SMA	-40 to 175	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Equivalent (Identical Electrical and Mechanical Specifications):

S2GA-13-F (Diodes Incorporated) is the direct equivalent replacement. It maintains all electrical parameters of the original S2GA-13 while providing ROHS3 compliance and active product status. This part is the primary recommendation for direct substitution in existing designs.

Functional Equivalents (1.5 A, 400 V Rating):

RF201L4SDDTE25 and RFN2L4SDDTE25 (Rohm Semiconductor) both provide 1.5 A, 400 V ratings with fast recovery characteristics and ROHS3 compliance. RFN2L4SDDTE25 includes AEC-Q101 automotive qualification. These parts are suitable for applications where fast recovery performance is beneficial or required.

S2GA (Taiwan Semiconductor Corporation) provides 1.5 A, 400 V rating with standard recovery speed and ROHS3 compliance. Operating temperature range is -55°C to 150°C, which is narrower than the original S2GA-13 but acceptable for most commercial applications.

Reduced Current Alternatives (1.0 A, 400 V Rating):

ES1G (Good-Ark Semiconductor), NRVA4004T3G (onsemi), STTH1R04A, and STTH1R04AY (STMicroelectronics) all provide 1.0 A, 400 V ratings. These parts are suitable only where circuit design permits reduced current capacity. STTH1R04AY includes AEC-Q101 automotive qualification and extended temperature range (-40°C to 175°C). NRVA4004T3G is marked "Not For New Designs" and should be avoided for new development.

Increased Current Alternative (2.0 A, 400 V Rating):

RR2L4SDDTE25 (Rohm Semiconductor) provides 2.0 A, 400 V rating with standard recovery speed. This part is marked "Not For New Designs" and should be used only where existing designs require higher current capacity and no other options are available.

Compliance Considerations:

All recommended active parts provide ROHS3 compliance. The original S2GA-13 is RoHS non-compliant; migration to compliant alternatives is required for regulated applications and new production.

Frequently Asked Questions (FAQ)

Q: Can S2GA-13-F be used as a direct replacement for S2GA-13?

A: Yes. S2GA-13-F is electrically and mechanically identical to S2GA-13, with the addition of ROHS3 compliance and active product status. It is the recommended direct replacement.

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

A: Standard recovery diodes have reverse recovery times greater than 500 ns, while fast recovery diodes have reverse recovery times of 500 ns or less. Fast recovery diodes reduce switching losses in high-frequency applications but are functionally interchangeable in standard rectification circuits.

Q: Can I use a 1.0 A rated diode in place of the 1.5 A S2GA-13?

A: Only if circuit design permits operation at reduced current. The 1.0 A parts (ES1G, NRVA4004T3G, STTH1R04A, STTH1R04AY) are suitable substitutes only where average rectified current does not exceed 1.0 A. Exceeding rated current causes excessive heat dissipation and reduced component life.

Q: Are all substitute parts available in the same SMA package?

A: Yes. All listed substitute parts use DO-214AC (SMA) surface mount package, ensuring mechanical and thermal compatibility with existing PCB layouts.

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

A: AEC-Q101 is an automotive qualification standard. Parts with this qualification (RFN2L4SDDTE25, NRVA4004T3G, STTH1R04AY) meet automotive reliability and quality requirements and are suitable for automotive and high-reliability applications.

Q: Why is NRVA4004T3G marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in mature or declining production phases. While functional, they should not be selected for new product development. Active alternatives should be used instead.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) determines power dissipation in the diode. Higher Vf values result in greater heat generation. The S2GA-13 has Vf of 1.15 V @ 1.5 A. Substitutes with Vf values between 1.1 V and 1.4 V are acceptable for most applications, but thermal design must account for the difference in power dissipation.

Q: Can I use RR2L4SDDTE25 (2.0 A) in place of S2GA-13 (1.5 A)?

A: Yes, from an electrical standpoint. The 2.0 A rating provides margin above the 1.5 A requirement. However, RR2L4SDDTE25 is marked "Not For New Designs" and should be used only where existing designs require higher current capacity and no active alternatives are suitable.

Q: What is the operating temperature range significance?

A: Operating temperature range defines the junction temperature limits within which the diode functions reliably. The S2GA-13 operates from -65°C to 150°C. Substitutes with narrower ranges (such as ES1G at -55°C to 125°C) may be unsuitable for applications requiring extended temperature operation. Verify application requirements before selection.

Q: Are Rohm PMDS package parts compatible with SMA package layouts?

A: RF201L4SDDTE25 and RFN2L4SDDTE25 use PMDS package designation but are specified as DO-214AC (SMA) in the Package / Case field. Mechanical compatibility must be verified against specific PCB footprint requirements, as package designations may vary by manufacturer.

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