RS1KFP Equivalent & Substitute Parts

Part Overview

The RS1KFP is a general-purpose rectifier diode manufactured by onsemi, rated for 800V DC reverse voltage and 1.2A average rectified current in a surface-mount SOD-123HE package. This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Identifying equivalent and substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when sourcing constraints necessitate alternative suppliers while maintaining electrical and mechanical compatibility.

Substiute Parts

RS1KFP

onsemiIn Stock: 10200RS1KFP Datasheet

Current PartRFQ

AR1PKHM3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1089AR1PKHM3/84A Datasheet

SimilarRFQ

RS1KLS

Taiwan Semiconductor CorporationIn Stock: 32045RS1KLS Datasheet

Parametric EquivalentRFQ

RS1KLSHRVG

Taiwan Semiconductor CorporationIn Stock: 1105RS1KLSHRVG Datasheet

Parametric EquivalentRFQ

S1KLS RVG

Taiwan Semiconductor CorporationIn Stock: 863S1KLS RVG Datasheet

Parametric EquivalentRFQ

S1KLSHRVG

Taiwan Semiconductor CorporationIn Stock: 817S1KLSHRVG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RS1KFP are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Identical Electrical Specifications): Parts that match all critical electrical parameters—800V reverse voltage, 1.2A average rectified current, 1.3V forward voltage at 1.2A, 300ns reverse recovery time, and 5µA reverse leakage current—while maintaining the same SOD-123HE package and surface-mount configuration. These parts are direct functional replacements.

Functional Substitutes (Compatible Within Tolerance): Parts that meet the primary voltage and current requirements but may differ in secondary parameters such as reverse recovery time, forward voltage characteristics, or package form factor. The AR1PKHM3/84A represents this category, offering 800V and 1A capability in an alternative package (DO-220AA) with improved reverse recovery time (120ns) and lower reverse leakage (1µA), suitable for applications where these enhancements are beneficial.

Key Parameters Determining Substitution:

• Voltage - DC Reverse (Vr) (Max): 800V minimum
• Current - Average Rectified (Io): 1.2A for parametric equivalents; 1A acceptable for functional substitutes
• Package compatibility: SOD-123HE for direct replacement; DO-220AA for alternative mounting
• Automotive Grade and AEC-Q101 qualification maintained across all substitutes
• RoHS3 compliance and MSL 1 rating consistent across all options

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The Taiwan Semiconductor Corporation parts RS1KLS, RS1KLSHRVG, S1KLS RVG, and S1KLSHRVG provide complete electrical and mechanical equivalence to the RS1KFP. All four parts maintain identical voltage ratings (800V), current ratings (1.2A), forward voltage characteristics (1.3V @ 1.2A), reverse leakage (5µA @ 800V), and package configuration (SOD-123HE). These parts carry Active product status, ensuring continued availability and manufacturing support. All maintain Automotive Grade classification and AEC-Q101 qualification, satisfying legacy system requirements. Selection among these four equivalents should be based on inventory availability and supplier preference, as electrical performance is identical.

For Functional Substitution (Alternative Performance Profile):

The Vishay General Semiconductor AR1PKHM3/84A offers an alternative approach for applications where enhanced performance characteristics are acceptable. This part maintains the 800V voltage rating and Automotive Grade/AEC-Q101 qualification but operates at 1A average rectified current (versus 1.2A) and employs avalanche technology rather than standard rectifier technology. The AR1PKHM3/84A provides superior reverse recovery time (120ns versus 300ns) and lower reverse leakage current (1µA versus 5µA), beneficial for high-frequency switching applications. The extended junction temperature range (-55 to 175°C versus -55 to 150°C) provides additional thermal margin. However, the DO-220AA package differs from the SOD-123HE, requiring PCB layout modification. This substitution is appropriate only when the 1A current rating satisfies application requirements and the package change is accommodated in design.

Compliance and Certification:

All substitute parts maintain RoHS3 compliance, MSL 1 rating (unlimited moisture sensitivity), and REACH unaffected status, ensuring regulatory alignment with the original RS1KFP specification.

Frequently Asked Questions (FAQ)

Q: Can RS1KLS, RS1KLSHRVG, S1KLS RVG, and S1KLSHRVG be used interchangeably with RS1KFP?

A: Yes. These four Taiwan Semiconductor Corporation parts are parametric equivalents, matching all critical electrical specifications: 800V reverse voltage, 1.2A average rectified current, 1.3V forward voltage at 1.2A, 300ns reverse recovery time, and 5µA reverse leakage current. All are packaged in SOD-123HE and maintain identical operating temperature range (-55 to 150°C). Direct substitution on the PCB is possible without design modification.

Q: What is the difference between the TSC parts (RS1KLS, RS1KLSHRVG, S1KLS RVG, S1KLSHRVG)?

A: These four parts are electrically and mechanically identical. Differences exist only in part number designation and manufacturing date codes. Selection should be based on supplier availability and inventory status. All carry Active product status and AEC-Q101 qualification.

Q: Can AR1PKHM3/84A replace RS1KFP directly?

A: AR1PKHM3/84A is a functional substitute, not a parametric equivalent. It maintains 800V voltage rating and Automotive Grade/AEC-Q101 qualification but differs in three aspects: (1) current rating is 1A instead of 1.2A, (2) package is DO-220AA instead of SOD-123HE, requiring PCB layout changes, and (3) technology is avalanche rather than standard, with improved reverse recovery time (120ns) and lower leakage (1µA). Use AR1PKHM3/84A only when the 1A current rating is sufficient and package change is accommodated.

Q: Are all substitute parts automotive-qualified?

A: Yes. All substitute parts—RS1KLS, RS1KLSHRVG, S1KLS RVG, S1KLSHRVG, and AR1PKHM3/84A—carry Automotive Grade classification and AEC-Q101 qualification, meeting automotive reliability and qualification standards.

Q: What is the significance of the "Not For New Designs" status of RS1KFP?

A: This status indicates that onsemi has discontinued the RS1KFP for new product development. Existing applications may continue to use RS1KFP from remaining inventory, but new designs should transition to active alternatives such as the TSC parametric equivalents or the Vishay functional substitute.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All substitute parts, including RS1KFP, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Which substitute part should be selected for high-frequency switching applications?

A: AR1PKHM3/84A is optimized for high-frequency operation, offering 120ns reverse recovery time compared to 300ns for other options. However, this selection requires PCB layout modification due to the DO-220AA package and is appropriate only when the 1A current rating satisfies application requirements.

Q: Are all parts RoHS3 compliant?

A: Yes. All parts—RS1KFP, RS1KLS, RS1KLSHRVG, S1KLS RVG, S1KLSHRVG, and AR1PKHM3/84A—are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.