SF66-TP Equivalent & Substitute Parts

Part Overview

The SF66-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 6 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The SF66-TP remains available in inventory (755 pieces) but is no longer in active production status.

Substiute Parts

SF66-TP

Micro Commercial CoIn Stock: 811SF66-TP Datasheet

Current PartRFQ

SF66G-TP

Micro Commercial CoIn Stock: 715SF66G-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF66-TP is determined by equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V
• Current - Average Rectified (Io): 6 A
• Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 6 A
• Reverse Recovery Time (trr): 35 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V

Mechanical Equivalence Criteria:

• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Technology: Standard

The SF66G-TP qualifies as a direct substitute based on matching all critical electrical parameters and mechanical form factor. The primary distinction is product status (active versus obsolete) and packaging configuration (Tape & Reel versus standard packaging).

Parameter Comparison

Engineering Selection Recommendations

SF66G-TP Selection Basis:

The SF66G-TP is the direct active equivalent for the obsolete SF66-TP. Selection of SF66G-TP is supported by the following factors:

1. Product Status: SF66G-TP maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete SF66-TP.

2. Electrical Equivalence: All critical electrical parameters match exactly, including reverse voltage rating (400 V), average rectified current (6 A), forward voltage drop (1.3 V @ 6 A), and reverse recovery time (35 ns).

3. Mechanical Compatibility: Both parts utilize identical DO-201AD axial through-hole packaging, enabling direct board-level substitution without layout modifications.

4. Compliance Alignment: Both parts maintain ROHS3 compliance and MSL Level 1 rating, satisfying regulatory and environmental requirements.

5. Operating Temperature Range: SF66G-TP provides an extended operating temperature range (-55°C ~ 150°C) compared to SF66-TP (-65°C ~ 125°C), offering improved performance margin in elevated temperature applications.

6. Packaging Format Consideration: SF66G-TP is supplied in Tape & Reel (TR) format, which is standard for high-volume production environments. Applications requiring bulk quantities benefit from this packaging configuration.

Frequently Asked Questions (FAQ)

Q: Can SF66G-TP be used as a direct replacement for SF66-TP in existing designs?

A: Yes. SF66G-TP is electrically and mechanically equivalent to SF66-TP. All critical parameters including voltage rating, current rating, forward voltage drop, and reverse recovery time are identical. The DO-201AD axial through-hole package is the same, permitting direct substitution on existing printed circuit boards without design modification.

Q: What is the difference between SF66-TP and SF66G-TP?

A: The primary differences are product status and packaging format. SF66-TP is obsolete and supplied in standard packaging, while SF66G-TP is active production and supplied in Tape & Reel (TR) format. SF66G-TP also features an extended operating temperature range (-55°C ~ 150°C versus -65°C ~ 125°C) and slightly higher capacitance (90 pF versus 60 pF at 4V, 1MHz).

Q: Are there any electrical performance differences between these parts?

A: No significant electrical performance differences exist. Both parts are rated for 400 V reverse voltage, 6 A average rectified current, 1.3 V forward voltage drop at 6 A, and 35 ns reverse recovery time. Reverse leakage current is identical at 5 µA @ 400 V. The capacitance difference (90 pF versus 60 pF) is minor and does not affect rectification performance in standard applications.

Q: What does the Tape & Reel (TR) packaging mean for SF66G-TP?

A: Tape & Reel packaging is a standard format for automated assembly processes. Components are wound on a continuous tape and reel, enabling high-speed pick-and-place machine operation. This format is typical for production environments and does not affect electrical or mechanical compatibility with through-hole mounting.

Q: Is SF66G-TP RoHS compliant?

A: Yes. SF66G-TP is ROHS3 compliant, matching the compliance status of SF66-TP. Both parts meet environmental and regulatory requirements for restricted substance use.

Q: Can I use SF66-TP inventory stock for new production?

A: SF66-TP inventory can be used for existing production runs or maintenance applications. However, for new designs and long-term production, SF66G-TP is recommended due to its active production status, ensuring consistent availability and supply chain reliability.

Q: What is the operating temperature range difference?

A: SF66-TP operates from -65°C to 125°C, while SF66G-TP operates from -55°C to 150°C. SF66G-TP provides a wider upper temperature limit, beneficial for applications in elevated ambient or high-power environments. The lower temperature limit difference (-65°C versus -55°C) is negligible for most industrial applications.