S1J R3G Equivalent & Substitute Parts

Part Overview

The S1J R3G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The S1J R3G operates across a junction temperature range of -55°C to 175°C and complies with RoHS3 and REACH standards. Standard recovery characteristics and low reverse leakage current make this diode suitable for general rectification applications in power supply and signal conditioning circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	1	µA @ 600 V
Capacitance @ Vr, F	12	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the S1J R3G are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents share identical or equivalent electrical specifications across all critical parameters: 600 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, 1.5 µs reverse recovery time, 1 µA reverse leakage current at 600 V, and DO-214AC surface mount packaging. These parts are direct functional replacements with no circuit redesign required.

Similar Parts maintain the same voltage and current ratings and package form factor but differ in one or more secondary electrical characteristics such as forward voltage, reverse recovery time, reverse leakage current, or capacitance. These parts are suitable for applications where the specific parameter variance does not impact circuit performance.

The key parameters determining substitution eligibility are:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Package	Product Status
S1J R3G	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Discontinued
S1J	YAGEO	600	1	1.1	—	DO-214AC	Active
S1J-KR2G	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Active
S1J-KR3G	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Active
S1JH	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Active
S1JR2	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Active
S1JR3	Taiwan Semiconductor Corporation	600	1	1.1 @ 1 A	1.5	1 @ 600 V	DO-214AC	Active
CGRA4005-G	Comchip Technology	600	1	1.1 @ 1 A	≤ 0.5	5 @ 600 V	DO-214AC	Active
CSFA105-G	Comchip Technology	600	1	1.5 @ 1 A	0.035	5 @ 600 V	DO-214AC	Active
GS1J-LTP	Micro Commercial Co	600	1	1.0 @ 1 A	> 0.5	10 @ 600 V	DO-214AC	Active
GS2J-LTP	Micro Commercial Co	600	2	1.1 @ 2 A	> 0.5	5 @ 600 V	DO-214AC	Active

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement)

The parts S1J-KR2G, S1J-KR3G, S1JR2, and S1JR3 from Taiwan Semiconductor Corporation are parametric equivalents to the S1J R3G. All four parts maintain identical electrical specifications: 600 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, 1.5 µs reverse recovery time, and 1 µA reverse leakage current at 600 V. These parts are all active products with RoHS3 compliance and MSL 1 rating, suitable for direct circuit substitution without modification.

The S1JH variant from Taiwan Semiconductor Corporation is also a parametric equivalent with identical electrical performance. This part carries AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging, making it appropriate for high-volume production environments and automotive applications.

The YAGEO S1J part is an active parametric equivalent with matching voltage and current ratings and DO-214AC packaging. This part provides an alternative source from a different manufacturer.

Similar Part Selection (Application-Dependent)

The Comchip Technology CGRA4005-G maintains 600 V reverse voltage and 1 A average rectified current with identical forward voltage (1.1 V @ 1 A) but features fast recovery characteristics (≤ 500 ns) compared to the standard recovery (> 500 ns) of the S1J R3G. Reverse leakage current is higher at 5 µA versus 1 µA. This part is suitable for applications where faster switching performance is beneficial and higher leakage current is acceptable.

The Comchip Technology CSFA105-G maintains 600 V reverse voltage and 1 A average rectified current but exhibits higher forward voltage (1.5 V @ 1 A) and significantly faster recovery time (35 ns). This part is appropriate for high-frequency switching applications where recovery speed is critical and forward voltage drop is not a limiting factor.

The Micro Commercial Co GS1J-LTP maintains 600 V reverse voltage and 1 A average rectified current with slightly lower forward voltage (1.0 V @ 1 A) but higher reverse leakage current (10 µA). This part is suitable for low-power applications where forward voltage minimization is desired.

The Micro Commercial Co GS2J-LTP is rated for 2 A average rectified current at 600 V reverse voltage, providing higher current capacity than the S1J R3G. This part is suitable for applications requiring increased current handling capability within the same voltage class and package form factor.

Frequently Asked Questions (FAQ)

Q: Can I use S1J-KR2G or S1J-KR3G as direct replacements for the discontinued S1J R3G?

A: Yes. Both S1J-KR2G and S1J-KR3G are parametric equivalents with identical electrical specifications: 600 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, 1.5 µs reverse recovery time, and 1 µA reverse leakage current at 600 V. Both are active products with RoHS3 compliance and can be used without circuit modification.

Q: What is the difference between the S1JH and other S1J variants?

A: The S1JH maintains identical electrical specifications to the S1J R3G but carries AEC-Q101 automotive qualification. The primary difference is qualification status and packaging format (Tape & Reel). The S1JH is suitable for automotive applications and high-volume production environments.

Q: Can I substitute the CGRA4005-G for the S1J R3G?

A: The CGRA4005-G maintains the same 600 V reverse voltage, 1 A average rectified current, and 1.1 V forward voltage. However, it features fast recovery (≤ 500 ns) versus standard recovery (> 500 ns) and higher reverse leakage current (5 µA versus 1 µA). This substitution is suitable for applications where faster switching is beneficial and higher leakage current does not impact performance.

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

A: Recovery time refers to how quickly the diode transitions from conducting to blocking state. Standard recovery diodes (> 500 ns) are suitable for general rectification and low-frequency applications. Fast recovery diodes (≤ 500 ns) are designed for higher-frequency switching applications where rapid state transition is required. The choice depends on circuit operating frequency and switching requirements.

Q: Can I use the GS2J-LTP (2 A rated) instead of the S1J R3G (1 A rated)?

A: Yes, the GS2J-LTP can be used in place of the S1J R3G. The higher current rating (2 A versus 1 A) provides additional margin and does not create circuit incompatibility. The 600 V reverse voltage rating and DO-214AC package are identical. This substitution is appropriate when higher current capacity is desired or when the GS2J-LTP offers better availability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory status of the S1J R3G.

Q: What packaging formats are available for these substitute parts?

A: The S1J R3G is supplied in Cut Tape (CT) packaging. Substitute parts are available in Cut Tape (CT), Tape & Reel (TR), and Digi-Reel® formats. Packaging selection depends on production volume and assembly process requirements. Electrical performance is identical across all packaging formats for the same part number.

Q: Can I use the CSFA105-G for general rectification applications?

A: The CSFA105-G maintains 600 V reverse voltage and 1 A average rectified current but exhibits higher forward voltage (1.5 V versus 1.1 V) and significantly faster recovery time (35 ns). This part is optimized for high-frequency switching applications. For general rectification where forward voltage drop is a design constraint, the parametric equivalents (S1J-KR2G, S1J-KR3G, S1JR2, S1JR3) are more appropriate.

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