Equivalent & Substitute Parts for RS1JFP

Part Overview

The RS1JFP is a general-purpose fast recovery rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 1.2 A average rectified current in a surface mount SOD-123HE package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer available or procurement is limited.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1.2	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1.2	V @ A
Reverse Recovery Time (trr)	300	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
Package / Case	SOD-123H	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the RS1JFP are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Direct Substitutes): Parts that maintain identical electrical specifications and package form factor. These parts satisfy all critical parameters: 600 V reverse voltage rating, 1.2 A average rectified current, 1.3 V forward voltage drop at 1.2 A, 300 ns reverse recovery time, 5 µA reverse leakage current at 600 V, and SOD-123HE surface mount packaging. Parametric equivalents include RS1JLS, RS1JLSHRVG, S1JLS RVG, and S1JLSH, all manufactured by Taiwan Semiconductor Corporation.

Functional Substitutes (Partial Compatibility): Parts that meet the core voltage and current requirements but differ in package form factor or current rating. The RS1PJ-M3/84A from Vishay General Semiconductor operates at 600 V reverse voltage with 1 A average rectified current in a DO-220AA (SMP) package. This part is suitable for applications where the 1 A current rating is sufficient and board layout accommodates the larger package footprint.

Parameter Comparison

Parameter	RS1JFP (onsemi)	RS1JLS (TSC)	RS1JLSHRVG (TSC)	S1JLS RVG (TSC)	S1JLSH (TSC)	RS1PJ-M3/84A (Vishay)
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1.2 A	1.2 A	1.2 A	1.2 A	1.2 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.2 A	1.3 V @ 1.2 A	1.3 V @ 1.2 A	1.3 V @ 1.2 A	1.3 V @ 1.2 A	1.3 V @ 1 A
Reverse Recovery Time (trr)	300 ns	300 ns	300 ns	Not specified	Not specified	250 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	1 µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Package / Case	SOD-123H	SOD-123H	SOD-123H	SOD-123H	SOD-123H	DO-220AA
Supplier Device Package	SOD-123HE	SOD-123HE	SOD-123HE	SOD-123HE	SOD-123HE	DO-220AA (SMP)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications and Package):

Select from the parametric equivalent group: RS1JLS, RS1JLSHRVG, S1JLS RVG, or S1JLSH. All four parts are manufactured by Taiwan Semiconductor Corporation and maintain full electrical and mechanical compatibility with the RS1JFP. These parts are classified as Active products, ensuring continued availability and supply chain stability. All parametric equivalents carry ROHS3 compliance and MSL 1 rating, matching the original part's environmental qualifications.

Among the parametric equivalents, S1JLSH offers the highest inventory availability at 49,374 pieces, followed by RS1JLS at 23,012 pieces. RS1JLSHRVG has limited inventory at 981 pieces and should be selected only when other options are unavailable.

For Current-Limited Applications (1 A Maximum):

The RS1PJ-M3/84A from Vishay General Semiconductor is suitable for applications where the circuit current does not exceed 1 A. This part maintains the 600 V reverse voltage rating and fast recovery speed classification. The DO-220AA package is larger than SOD-123HE, requiring board layout modification. The RS1PJ-M3/84A exhibits superior reverse leakage performance at 1 µA compared to 5 µA in the original part and faster reverse recovery time at 250 ns. This part is classified as Active with 18,300 pieces in inventory.

Compliance and Qualification:

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard manufacturing and storage processes. The original RS1JFP carries AEC-Q101 automotive qualification; substitute parts do not explicitly list this qualification in the provided data. Applications requiring automotive-grade certification should confirm qualification status with the manufacturer before selection.

Frequently Asked Questions (FAQ)

Q: Can RS1JLS, RS1JLSHRVG, S1JLS RVG, and S1JLSH be used interchangeably with RS1JFP?

A: Yes. These four parts are parametric equivalents with identical electrical specifications (600 V, 1.2 A, 1.3 V forward drop, 300 ns recovery time, 5 µA leakage) and identical SOD-123HE package form factor. Direct substitution on the PCB is possible without circuit modification or board layout changes.

Q: What is the difference between the parametric equivalent parts from Taiwan Semiconductor Corporation?

A: RS1JLS, RS1JLSHRVG, S1JLS RVG, and S1JLSH are electrically identical. Differences exist only in product designation and inventory levels. RS1JLSHRVG and S1JLS RVG include suffix designations indicating specific manufacturing or qualification variants. S1JLSH has the highest inventory availability. Selection among these parts should be based on supplier availability and lead time requirements.

Q: Can RS1PJ-M3/84A replace RS1JFP in all applications?

A: RS1PJ-M3/84A is suitable only for applications where the maximum circuit current does not exceed 1 A. The part is rated for 1 A average rectified current compared to 1.2 A in the RS1JFP. The DO-220AA package is physically larger than SOD-123HE, requiring PCB layout modification. If the application requires the full 1.2 A current capacity or has space constraints for the SOD-123HE package, this part is not suitable.

Q: Why is the RS1JFP marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status at the manufacturer. onsemi no longer recommends this part for new circuit designs. Existing inventory remains available for legacy system support and repair. For new designs, selection from the Active product alternatives (RS1JLS, RS1JLSHRVG, S1JLS RVG, S1JLSH, or RS1PJ-M3/84A) is appropriate.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the environmental compliance status of the original RS1JFP. All parts also carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture control requirements during storage or handling.

Q: What is the difference between SOD-123H and SOD-123HE packaging?

A: SOD-123H refers to the package outline specification. SOD-123HE is the supplier device package designation, indicating the specific tape and reel format used for automated assembly. Both designations refer to the same physical package form factor. Parts specified with SOD-123HE are suitable for direct substitution on boards designed for SOD-123H components.

Q: Which substitute part should be selected for maximum inventory availability?

A: S1JLSH offers the highest inventory level at 49,374 pieces, followed by RS1JLS at 23,012 pieces. Both parts are parametric equivalents with identical electrical specifications and package form factor. S1JLSH is the recommended selection when inventory availability is a primary consideration.

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