RS1DFA Equivalent & Substitute Parts

Part Overview

The RS1DFA is a general-purpose rectifier diode manufactured by onsemi, rated for 200V DC reverse voltage with 800mA average rectified current in a surface mount SOD-123FA package. This component is classified as Not For New Designs, indicating it has been superseded in onsemi's product portfolio. Organizations currently using RS1DFA in active applications require equivalent alternatives that maintain electrical and mechanical compatibility while offering active product status and continued supply availability.

Substiute Parts

RS1DFA

onsemiIn Stock: 35163RS1DFA Datasheet

Current PartRFQ

RS07D-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 20254RS07D-GS08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RS1DFA are identified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): 200V minimum
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA
• Reverse Recovery Time (trr): 150ns or lower
• Operating Temperature Range: -55°C to 150°C minimum
• Grade: Automotive
• Qualification: AEC-Q101

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS Status: ROHS3 Compliant

Current Rating Consideration: The RS1DFA specifies 800mA average rectified current. Substitute parts with lower current ratings (500mA or below) operate within reduced current capacity and require circuit-level verification to confirm application suitability.

The RS07D-GS08 meets all electrical and mechanical compatibility criteria with identical voltage, speed, temperature range, automotive grade, and AEC-Q101 qualification. The primary difference is reduced current rating (500mA versus 800mA) and different package form factor (DO-219AB versus SOD-123FA).

Parameter Comparison

Engineering Selection Recommendations

RS07D-GS08 Substitution Basis:

The RS07D-GS08 qualifies as an electrical and mechanical equivalent to the RS1DFA based on matching voltage rating (200V), speed classification (Fast Recovery ≤ 500ns), reverse recovery time (150ns), operating temperature range (-55°C to 150°C), automotive grade designation, and AEC-Q101 qualification. Both components maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.

Product Status Advantage:

The RS07D-GS08 carries Active product status, ensuring continued manufacturing support and supply availability. The RS1DFA is designated Not For New Designs, indicating onsemi has discontinued active development and may limit future supply.

Current Rating Differential:

The RS07D-GS08 is rated for 500mA average rectified current compared to the RS1DFA's 800mA rating. Applications operating at or near 800mA require circuit-level analysis to confirm the reduced current capacity does not exceed thermal or electrical limits under actual operating conditions.

Package Form Factor:

The RS07D-GS08 uses DO-219AB (SMF) package geometry, while the RS1DFA uses SOD-123FA. PCB layout modifications are required to accommodate the different package footprint.

Frequently Asked Questions (FAQ)

Q: Can RS07D-GS08 directly replace RS1DFA without circuit modification?

A: Electrical substitution is valid for applications operating below 500mA average rectified current. Applications requiring the full 800mA rating require circuit redesign or alternative component selection. Package footprint differences necessitate PCB layout changes regardless of current rating.

Q: What is the significance of the different package types (SOD-123FA versus DO-219AB)?

A: Package type determines physical dimensions, PCB footprint, and thermal characteristics. SOD-123FA and DO-219AB are distinct package geometries requiring different land patterns on printed circuit boards. Component placement and thermal management may differ between packages.

Q: Are both components suitable for automotive applications?

A: Both RS1DFA and RS07D-GS08 carry Automotive grade designation and AEC-Q101 qualification, confirming suitability for automotive applications within their specified electrical ratings and operating conditions.

Q: What is the impact of the 300mA current rating reduction?

A: The RS07D-GS08 maximum average rectified current is 500mA versus RS1DFA's 800mA. Applications with peak or average current demands exceeding 500mA will exceed the substitute component's rating. Circuit analysis must confirm actual current requirements remain within the 500mA limit.

Q: Do both components have identical reverse leakage characteristics?

A: No. RS1DFA specifies 5µA reverse leakage at 200V, while RS07D-GS08 specifies 10µA at 200V. Applications sensitive to leakage current require evaluation of this 2x difference.

Q: Are there compliance or regulatory differences between the two components?

A: Both components are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Moisture sensitivity level is identical (MSL 1, Unlimited) for both parts.

Q: Why is RS1DFA marked as Not For New Designs?

A: Not For New Designs status indicates onsemi has transitioned this component to end-of-life status. New product development should utilize active alternatives such as RS07D-GS08 to ensure long-term supply continuity and manufacturer support.