RS3J R7G Equivalent & Substitute Parts

Part Overview

The RS3J R7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is classified as discontinued at DiGi Electronics, indicating limited availability of the original part number. Equivalent and substitute parts are necessary to maintain design continuity and ensure procurement of functionally compatible alternatives that meet the electrical and mechanical requirements of the application.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Surface Mount	—
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 RS3J R7G is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature Range: Compatible with -55°C to 150°C minimum

Secondary Parameters Affecting Compatibility:

Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 3 A (or lower)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (or equivalent)
Reverse Recovery Time (trr): 250 ns (or lower)
Current - Reverse Leakage @ Vr: 10 µA @ 600 V (or lower)

Substitute parts are grouped into three categories:

Parametric Equivalents: Identical electrical specifications and same manufacturer (Taiwan Semiconductor Corporation)
Direct Manufacturer Equivalents: Different manufacturer but identical core electrical parameters (600 V, 3 A, DO-214AB)
Similar Alternatives: Same voltage and current ratings with minor variations in recovery time or forward voltage that remain within acceptable operating margins

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
RS3J R7G	Taiwan Semiconductor Corporation	600	3	1.3 @ 3A	Fast Recovery ≤ 500ns	250	10 @ 600V	DO-214AB, SMC	-55 to 150	Discontinued
RS3J V7G	Taiwan Semiconductor Corporation	600	3	1.3 @ 3A	Fast Recovery ≤ 500ns	250	10 @ 600V	DO-214AB, SMC	-55 to 150	Discontinued
RS3JH	Taiwan Semiconductor Corporation	600	3	1.3 @ 3A	Fast Recovery ≤ 500ns	250	10 @ 600V	DO-214AB, SMC	-55 to 150	Active
S3J-TP	Micro Commercial Co	600	3	1.2 @ 3A	Standard Recovery >500ns	—	10 @ 600V	DO-214AB, SMC	-55 to 150	Active
CFRC305-G	Comchip Technology	600	3	1.3 @ 3A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AB, SMC	—	Active
ER3J-TP	Micro Commercial Co	600	3	1.7 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 600V	DO-214AB, SMC	-50 to 175	Active
MURS360-E3/57T	Vishay General Semiconductor - Diodes Division	600	3	1.28 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 600V	DO-214AB, SMC	-65 to 175	Active
MURS360-E3/9AT	Vishay General Semiconductor - Diodes Division	600	3	1.28 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 600V	DO-214AB, SMC	-65 to 175	Active
MURS360T3G	onsemi	600	3	1.25 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 600V	DO-214AB, SMC	-65 to 175	Active
RS3J-13-F	Diodes Incorporated	600	3	1.3 @ 3A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AB, SMC	-65 to 150	Active

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Recommended Primary Substitutes):

RS3JH (Taiwan Semiconductor Corporation) is the primary recommended substitute. This part maintains identical electrical specifications to the RS3J R7G, including 600 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, 250 ns reverse recovery time, and DO-214AB SMC packaging. The RS3JH is currently in active product status with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Inventory availability is 3,916 pieces.

RS3J-13-F (Diodes Incorporated) provides equivalent electrical performance with identical voltage, current, and package specifications. This part is active and ROHS3 compliant with 17,400 pieces in inventory. The operating temperature range extends to -65°C, providing enhanced low-temperature performance compared to the original part.

Tier 2 - Functionally Compatible Alternatives:

MURS360T3G (onsemi) meets all critical electrical parameters with 600 V reverse voltage, 3 A current rating, and DO-214AB SMC packaging. Forward voltage is 1.25 V at 3 A, which is lower than the original specification. Reverse recovery time is 75 ns, faster than the original 250 ns. Operating temperature range extends to -65°C to 175°C. This part has the highest inventory availability at 105,100 pieces and is in active product status.

MURS360-E3/57T and MURS360-E3/9AT (Vishay General Semiconductor - Diodes Division) are functionally equivalent with identical voltage and current ratings. Both feature 1.28 V forward voltage at 3 A and 75 ns reverse recovery time. Operating temperature range is -65°C to 175°C. These parts are active and ROHS3 compliant.

Tier 3 - Acceptable Substitutes with Parameter Variations:

S3J-TP (Micro Commercial Co) meets voltage, current, and package requirements with 600 V, 3 A, and DO-214AB SMC packaging. Forward voltage is 1.2 V at 3 A, which is lower than the original. Speed classification is standard recovery (>500ns), which differs from the fast recovery specification of the original part. This part is active with 39,720 pieces in inventory.

ER3J-TP (Micro Commercial Co) provides 600 V, 3 A ratings in DO-214AB SMC packaging with extended operating temperature range (-50°C to 175°C). Forward voltage is 1.7 V at 3 A, which is higher than the original specification. Reverse recovery time is 35 ns, significantly faster than the original. This part is active with 4,120 pieces in inventory.

CFRC305-G (Comchip Technology) meets voltage, current, and package specifications with 600 V, 3 A, and DO-214AB SMC packaging. Reverse leakage current is 5 µA at 600 V, lower than the original 10 µA specification. This part is active and ROHS3 compliant with 849 pieces in inventory.

All recommended substitutes are ROHS3 compliant, MSL 1 (Unlimited), and REACH unaffected, maintaining regulatory compliance with the original part.

Frequently Asked Questions (FAQ)

Q: Can RS3J V7G be used as a direct replacement for RS3J R7G?

A: Yes. RS3J V7G is a parametric equivalent manufactured by Taiwan Semiconductor Corporation with identical electrical specifications: 600 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, 250 ns reverse recovery time, and DO-214AB SMC packaging. Both parts are discontinued at DiGi Electronics but maintain the same performance characteristics.

Q: What is the difference between fast recovery and standard recovery diodes in this product category?

A: Fast recovery diodes have reverse recovery time ≤ 500 ns for currents > 200 mA, while standard recovery diodes have reverse recovery time > 500 ns. The RS3J R7G specifies fast recovery with 250 ns reverse recovery time. Substitutes with standard recovery (such as S3J-TP) may introduce switching losses in high-frequency applications but are electrically compatible for DC rectification applications.

Q: Is RS3JH suitable for automotive applications?

A: Yes. RS3JH carries automotive-grade qualification (AEC-Q101) and is rated for -55°C to 150°C operating temperature. This part is recommended for automotive and industrial applications requiring certified components.

Q: Can I substitute a 5 A rated diode for the 3 A RS3J R7G?

A: No. The CGRC505-G (5 A rated) is not a suitable substitute. While it maintains the same 600 V reverse voltage and DO-214AB SMC package, the higher current rating introduces different electrical characteristics and is not a direct functional equivalent. Substitution must maintain the 3 A average rectified current specification.

Q: What is the significance of reverse leakage current in diode selection?

A: Reverse leakage current (Ir) represents the small current flowing through the diode in reverse bias condition. The RS3J R7G specifies 10 µA at 600 V. Substitutes with lower reverse leakage (such as CFRC305-G at 5 µA or RS3J-13-F at 5 µA) provide improved performance in high-impedance circuits but remain compatible with the original specification.

Q: Are all substitute parts available in the same packaging format?

A: All recommended substitutes use DO-214AB (SMC) surface mount packaging, which is mechanically and electrically compatible with the RS3J R7G. Packaging options vary between manufacturers (tape & reel, cut tape, or bulk), but the component footprint and pinout remain identical.

Q: What is the impact of forward voltage variation among substitutes?

A: Forward voltage (Vf) varies among substitutes from 1.2 V to 1.7 V at 3 A. The RS3J R7G specifies 1.3 V. Lower forward voltage (such as S3J-TP at 1.2 V) reduces power dissipation and heat generation. Higher forward voltage (such as ER3J-TP at 1.7 V) increases power dissipation. Selection depends on thermal design and efficiency requirements of the application.

Q: Can MURS360T3G replace RS3J R7G in all applications?

A: MURS360T3G is functionally compatible with identical voltage and current ratings. However, it features 75 ns reverse recovery time compared to the original 250 ns, and extended operating temperature range (-65°C to 175°C). These differences make it suitable for high-frequency switching applications and wide-temperature environments. Verification of circuit performance is necessary for applications sensitive to recovery time characteristics.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates the diode meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, hexavalent chromium, and certain flame retardants. All recommended substitutes maintain ROHS3 compliance, ensuring regulatory compatibility with the original part.

Q: Is moisture sensitivity a concern for these diodes?

A: All substitute parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture sensitivity concerns. These components do not require special moisture control during storage or handling.

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