RS1J Equivalent & Substitute Parts

Part Overview

The RS1J is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original component is no longer in production or inventory allocation is limited.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Mounting Type	Surface Mount	-
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the RS1J is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.3 V @ 1 A for direct equivalence; values up to 1.1 V are acceptable for standard recovery types
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns) determines application suitability
Reverse Recovery Time (trr): 250 ns for fast recovery types; not specified for standard recovery types
Current - Reverse Leakage @ Vr: Must not exceed 5 µA @ 600 V

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount (required)
Package / Case: DO-214AC (SMA) or DO-214BA (GF1) for pin-compatible alternatives
Operating Temperature Range: Must support -55°C to 150°C minimum

Compliance Requirements:

RoHS Status: ROHS3 Compliant (mandatory)
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories: Direct Equivalents (identical electrical and mechanical specifications), Similar Parts (same voltage and current ratings with acceptable parameter variations), and Upgrade Parts (active product status with enhanced specifications or extended temperature range).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
RS1J	onsemi	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AC (SMA)	-55 to 150	Not For New Designs
MRA4005T1G	onsemi	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	10 @ 600V	DO-214AC (SMA)	-55 to 175	Not For New Designs
MRA4005T3G	onsemi	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	10 @ 600V	DO-214AC (SMA)	-55 to 175	Not For New Designs
NRVA4005T3G	onsemi	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	10 @ 600V	DO-214AC (SMA)	-55 to 150	Not For New Designs
CFRA105-G	Comchip Technology	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AC (SMA)	-55 to 150	Active
RGF1J-E3/5CA	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214BA (GF1)	-65 to 175	Active
RS1J-E3/61T	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AC (SMA)	-55 to 150	Active
CMR1F-06M BK PBFREE	Central Semiconductor Corp	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AC (SMA)	-65 to 150	Active
CPD24-CMR1F-06M-CT	Central Semiconductor Corp	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	Die	-65 to 150	Active
RS1J-13-F	Diodes Incorporated	600	1	1.3 @ 1A	Fast Recovery ≤ 500ns	250	5 @ 600V	DO-214AC (SMA)	-65 to 150	Active
CMR1-06M BK PBFREE	Central Semiconductor Corp	600	1	1.1 @ 1A	Standard Recovery > 500ns	-	5 @ 600V	DO-214AC (SMA)	-65 to 150	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications):

The following parts match the RS1J electrical and mechanical specifications exactly and are suitable for direct replacement:

RS1J-E3/61T (Vishay General Semiconductor - Diodes Division): Active product status. Identical voltage, current, forward voltage, recovery speed, and reverse recovery time. DO-214AC (SMA) package compatibility confirmed. Operating temperature range -55°C to 150°C matches the original specification.
RS1J-13-F (Diodes Incorporated): Active product status. Identical electrical specifications with fast recovery characteristics (250 ns trr). DO-214AC (SMA) package. Extended operating temperature range (-65°C to 150°C) provides additional margin. High inventory availability (151,735 pcs).

Direct Equivalents with Package Variation:

CFRA105-G (Comchip Technology): Active product status. Identical electrical specifications including 1.3 V forward voltage and 250 ns reverse recovery time. DO-214AC (SMA) package. Operating temperature range -55°C to 150°C. Limited inventory (724 pcs).

Pin-Compatible Alternative (Different Package):

RGF1J-E3/5CA (Vishay General Semiconductor - Diodes Division): Active product status. Identical electrical specifications. DO-214BA (GF1) package provides mechanical alternative with same pin configuration. Extended operating temperature range (-65°C to 175°C). SUPERECTIFIER® series designation. Inventory: 15,400 pcs.

Upgrade Parts (Active Status with Enhanced Specifications):

CMR1F-06M BK PBFREE (Central Semiconductor Corp): Active product status. Identical electrical specifications (1.3 V Vf, 250 ns trr). Extended operating temperature range (-65°C to 150°C). DO-214AC (SMA) package. Suitable for applications requiring active product support.

Similar Parts (Acceptable Parameter Variations):

The following parts have lower forward voltage (1.1 V vs. 1.3 V) and standard recovery characteristics (> 500ns vs. ≤ 500ns). These are suitable for applications where fast recovery is not required:

MRA4005T1G and MRA4005T3G (onsemi): Both rated 600 V, 1 A with 1.1 V forward voltage. Extended temperature range (-55°C to 175°C). Standard recovery type. Not For New Designs status.
NRVA4005T3G (onsemi): Automotive-grade part with AEC-Q101 qualification. 600 V, 1 A, 1.1 V forward voltage. Standard recovery type. Suitable for automotive applications requiring qualified components.
CMR1-06M BK PBFREE (Central Semiconductor Corp): Active product status. 600 V, 1 A with 1.1 V forward voltage and standard recovery characteristics. Extended temperature range (-65°C to 150°C).

Special Application Part:

CPD24-CMR1F-06M-CT (Central Semiconductor Corp): Active product status. Die form with identical electrical specifications. Intended for custom packaging or hybrid applications. Not suitable for standard surface mount PCB assembly.

All recommended parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can I use MRA4005T3G as a direct replacement for RS1J?

A: MRA4005T3G is electrically compatible but not a direct equivalent. It has identical voltage and current ratings (600 V, 1 A) and the same DO-214AC (SMA) package. However, it features standard recovery characteristics (> 500ns) versus the RS1J's fast recovery (≤ 500ns) and has lower forward voltage (1.1 V vs. 1.3 V). It is suitable for applications where fast recovery is not required. Extended temperature range (-55°C to 175°C) provides additional margin.

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

A: Fast recovery diodes have reverse recovery time (trr) of 250 ns or less, making them suitable for high-frequency switching applications and circuits requiring rapid switching transitions. Standard recovery diodes have trr greater than 500ns and are suitable for lower-frequency applications and general rectification. The RS1J specifies fast recovery (250 ns trr), which determines its application suitability.

Q: Is RS1J-13-F a suitable replacement for RS1J?

A: Yes. RS1J-13-F (Diodes Incorporated) is a direct electrical equivalent with identical 600 V, 1 A ratings, 1.3 V forward voltage, and 250 ns reverse recovery time. Both use DO-214AC (SMA) packages. RS1J-13-F has active product status and extended operating temperature range (-65°C to 150°C). High inventory availability (151,735 pcs) makes it readily accessible.

Q: Can I substitute RGF1J-E3/5CA for RS1J?

A: RGF1J-E3/5CA is electrically equivalent with identical 600 V, 1 A ratings, 1.3 V forward voltage, and 250 ns reverse recovery time. The package differs: RGF1J-E3/5CA uses DO-214BA (GF1) instead of DO-214AC (SMA). Both packages are surface mount with compatible pin configurations. RGF1J-E3/5CA has active product status and extended temperature range (-65°C to 175°C). PCB layout modification may be required due to package footprint differences.

Q: Why is NRVA4005T3G listed as a substitute if it has different electrical characteristics?

A: NRVA4005T3G is listed as a similar part suitable for applications where fast recovery is not required. It maintains the 600 V, 1 A core ratings and DO-214AC (SMA) package compatibility. The key difference is standard recovery characteristics (> 500ns) and lower forward voltage (1.1 V). NRVA4005T3G is automotive-grade with AEC-Q101 qualification, making it suitable for automotive applications requiring qualified components.

Q: What does "Not For New Designs" status mean for the RS1J?

A: "Not For New Designs" indicates the RS1J has reached end-of-life status and is no longer recommended for new product development. Existing inventory may be available, but long-term supply is not guaranteed. For new designs, active-status alternatives such as RS1J-13-F, RS1J-E3/61T, or CFRA105-G are recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and regulatory requirements.

Q: What is the significance of the DO-214BA (GF1) package used by RGF1J-E3/5CA?

A: DO-214BA (GF1) is a surface mount package with the same electrical pin configuration as DO-214AC (SMA) but with a different physical footprint. Both are suitable for surface mount assembly. Selection between them depends on PCB layout constraints and available footprint space. RGF1J-E3/5CA's DO-214BA package may offer different thermal characteristics or mechanical advantages in specific applications.

Q: Can I use CMR1-06M BK PBFREE in place of RS1J?

A: CMR1-06M BK PBFREE is compatible for applications where standard recovery characteristics are acceptable. It maintains 600 V, 1 A ratings and DO-214AC (SMA) package compatibility. Forward voltage is lower (1.1 V vs. 1.3 V), and recovery is standard type (> 500ns vs. ≤ 500ns). It has active product status and extended temperature range (-65°C to 150°C). Not suitable for applications requiring fast recovery characteristics.

Q: What is the inventory status of recommended substitutes?

A: RS1J-13-F has the highest inventory availability (151,735 pcs). RS1J-E3/61T has 25,400 pcs available. CFRA105-G has limited inventory (724 pcs). RGF1J-E3/5CA has 15,400 pcs. CMR1F-06M BK PBFREE has 922 pcs. Inventory levels should be verified at time of procurement as availability is subject to change.

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