FFB20U60STM Equivalent & Substitute Parts

Part Overview

The FFB20U60STM is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 20 A average rectified current in a Surface Mount TO-263 (D2PAK) package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement continuity. The part features fast recovery characteristics with a reverse recovery time of 90 ns and operates across a junction temperature range of -65°C to 150°C.

Substiute Parts

FFB20U60STM

onsemiIn Stock: 2210FFB20U60STM Datasheet

Current PartRFQ

VS-20ETF06S-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 811VS-20ETF06S-M3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FFB20U60STM is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 600 V minimum
• Current - Average Rectified (Io): 20 A minimum
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount

Acceptable Parameter Variations:

• Voltage - Forward (Vf) (Max) @ If: Lower values are acceptable
• Reverse Recovery Time (trr): Values within fast recovery classification are acceptable
• Current - Reverse Leakage @ Vr: Higher values within specification are acceptable
• Operating Temperature - Junction: Range must encompass or exceed the application requirement

The substitute part VS-20ETF06S-M3 meets all electrical and mechanical equivalence criteria for direct substitution in applications designed for the FFB20U60STM.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The FFB20U60STM is classified as obsolete, while VS-20ETF06S-M3 is active. Selection of the active substitute part ensures long-term availability and supply chain continuity for new designs and production runs.

Compliance and Certification: Both parts carry identical REACH Status (REACH Unaffected) and ECCN classification (EAR99). The VS-20ETF06S-M3 additionally carries RoHS3 Compliance certification, providing enhanced environmental regulatory alignment for applications subject to RoHS requirements.

Electrical Performance: The VS-20ETF06S-M3 demonstrates superior forward voltage characteristics (1.3 V versus 2.2 V at 20 A), resulting in reduced power dissipation and improved thermal efficiency. The reverse recovery time of 160 ns remains within the fast recovery classification and is acceptable for applications designed for the FFB20U60STM.

Temperature Range: The VS-20ETF06S-M3 operates from -40°C to 150°C. Applications requiring operation below -40°C junction temperature must retain the FFB20U60STM or identify alternative parts with extended low-temperature ratings.

Packaging and Inventory: Both parts utilize identical TO-263AB (D2PAK) surface mount packaging. The VS-20ETF06S-M3 is available in tube packaging with 717 units in stock, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can VS-20ETF06S-M3 directly replace FFB20U60STM in existing designs?

A: Yes. Both parts share identical voltage ratings (600 V), current ratings (20 A), speed classification (fast recovery), and package configuration (TO-263AB D2PAK). The substitute part meets all electrical and mechanical requirements for direct substitution.

Q: What is the significance of the lower forward voltage in VS-20ETF06S-M3?

A: The forward voltage of 1.3 V in VS-20ETF06S-M3 compared to 2.2 V in FFB20U60STM results in lower power dissipation during conduction. This characteristic is beneficial for thermal management and overall circuit efficiency, with no negative impact on circuit functionality.

Q: Are there temperature range limitations when substituting?

A: The VS-20ETF06S-M3 operates from -40°C to 150°C junction temperature, compared to -65°C to 150°C for FFB20U60STM. Applications requiring operation below -40°C must verify alternative parts or retain the original FFB20U60STM specification.

Q: Does the higher reverse leakage current in VS-20ETF06S-M3 affect circuit performance?

A: The reverse leakage current of 100 µA in VS-20ETF06S-M3 compared to 10 µA in FFB20U60STM is within acceptable limits for general-purpose rectifier applications. Circuit designs must account for this parameter during thermal and reliability analysis.

Q: What is the impact of the longer reverse recovery time in VS-20ETF06S-M3?

A: The reverse recovery time of 160 ns in VS-20ETF06S-M3 compared to 90 ns in FFB20U60STM remains within the fast recovery classification (≤ 500ns). Both parts are suitable for applications designed for fast recovery diodes without performance degradation.

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

A: Both parts carry identical REACH Status (REACH Unaffected) and ECCN classification (EAR99). The VS-20ETF06S-M3 includes RoHS3 Compliance certification, providing additional environmental regulatory alignment for applicable markets and applications.

Q: Is the TO-263AB package identical between both parts?

A: Yes. Both FFB20U60STM and VS-20ETF06S-M3 utilize the TO-263-3 D2PAK (2 Leads + Tab) surface mount package configuration. PCB footprints and thermal management characteristics are identical.