HS1KFS General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The HS1KFS is an active general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 800 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-128 package. This component is designed for fast recovery applications with a reverse recovery time of 75 nanoseconds and operates across a junction temperature range of -55°C to 150°C. The part is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is currently in active production with 2538 units in stock.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as automotive qualification or alternative packaging formats.

Substiute Parts

HS1KFS

Taiwan Semiconductor CorporationIn Stock: 2566HS1KFS Datasheet

Current PartRFQ

RFN1LAM7STFTR

Rohm SemiconductorIn Stock: 17206RFN1LAM7STFTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HS1KFS are identified based on electrical and mechanical compatibility within the general purpose rectifier diode category. The substitution logic is based on the following criteria:

Primary Compatibility Parameters:

• Fast recovery speed classification (≤ 500ns, > 200mA)
• Surface mount technology with SOD-128 package compatibility
• RoHS3 compliance and unlimited moisture sensitivity level (MSL 1)
• Operating temperature range support
• Reverse recovery time within acceptable range (75–80 ns)

Voltage and Current Ratings: Substitute parts must operate within the electrical specifications of the main application. The HS1KFS operates at 800 V maximum reverse voltage with 1 A average rectified current. Substitute parts with equal or higher voltage ratings and equal or higher current ratings are electrically compatible for direct replacement in applications designed for the HS1KFS.

Packaging and Mounting: All substitute parts maintain surface mount technology and SOD-128 package compatibility, ensuring mechanical fit and assembly process alignment.

Parameter Comparison

Engineering Selection Recommendations

HS1KFS Selection Criteria: The HS1KFS is appropriate for applications requiring 800 V reverse voltage rating and 1 A average rectified current. This part is active in production with standard technology classification and RoHS3 compliance. Use the HS1KFS when the full voltage and current specifications are required and standard-grade components are acceptable.

RFN1LAM7STFTR Selection Criteria: The RFN1LAM7STFTR is suitable for applications with maximum voltage requirements of 700 V and maximum current requirements of 800 mA. This part carries AEC-Q101 automotive qualification, making it appropriate for automotive-grade applications. The lower forward voltage drop (1.5 V @ 800 mA versus 1.7 V @ 1 A) may provide thermal efficiency benefits in power dissipation-sensitive designs. Both parts maintain identical fast recovery speed classification, RoHS3 compliance, and unlimited moisture sensitivity level.

Substitution Applicability: The RFN1LAM7STFTR is a direct substitute for the HS1KFS in applications where the voltage and current requirements do not exceed 700 V and 800 mA respectively. Both parts are surface mount SOD-128 devices with identical speed classification and compliance certifications. The RFN1LAM7STFTR is available in higher inventory (17125 units) and offers automotive qualification as an additional feature.

Frequently Asked Questions (FAQ)

Q: Can the RFN1LAM7STFTR replace the HS1KFS in all applications?

A: The RFN1LAM7STFTR is a direct substitute only for applications where the maximum reverse voltage does not exceed 700 V and the maximum average rectified current does not exceed 800 mA. Applications requiring the full 800 V rating or 1 A current rating must use the HS1KFS or equivalent parts with matching or higher specifications.

Q: What is the difference in forward voltage drop between these parts?

A: The HS1KFS exhibits a maximum forward voltage of 1.7 V at 1 A, while the RFN1LAM7STFTR exhibits a maximum forward voltage of 1.5 V at 800 mA. At equivalent current levels, the RFN1LAM7STFTR demonstrates lower forward voltage characteristics, which may reduce power dissipation in current-limited applications.

Q: Are both parts suitable for automotive applications?

A: The RFN1LAM7STFTR carries AEC-Q101 automotive qualification. The HS1KFS is classified as standard technology without explicit automotive qualification. For automotive-grade applications, the RFN1LAM7STFTR is the appropriate selection.

Q: Do these parts have identical package compatibility?

A: Yes. Both the HS1KFS and RFN1LAM7STFTR use the SOD-128 surface mount package with identical mechanical dimensions and mounting requirements. No PCB layout or assembly process modifications are required for substitution.

Q: What is the reverse recovery time difference?

A: The HS1KFS has a reverse recovery time of 75 nanoseconds, while the RFN1LAM7STFTR has a reverse recovery time of 80 nanoseconds. Both parts are classified as fast recovery diodes (≤ 500ns, > 200mA), and the 5-nanosecond difference is negligible for most general purpose rectifier applications.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the HS1KFS and RFN1LAM7STFTR are RoHS3 compliant with unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard surface mount assembly processes and environmental regulations.

Q: What is the reverse leakage current specification?

A: Both parts exhibit 1 µA reverse leakage current at their respective maximum reverse voltage ratings (800 V for HS1KFS, 700 V for RFN1LAM7STFTR). Leakage characteristics are equivalent within their rated voltage ranges.