SF11G-AP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The SF11G-AP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary to support existing applications, legacy system maintenance, and design transitions to active product alternatives.

Substiute Parts

SF11G-AP

Micro Commercial CoIn Stock: 1182SF11G-AP Datasheet

Current PartRFQ

SF11G A0G

Taiwan Semiconductor CorporationIn Stock: 961SF11G A0G Datasheet

Parametric EquivalentRFQ

SF11GHA0G

Taiwan Semiconductor CorporationIn Stock: 1092SF11GHA0G Datasheet

Parametric EquivalentRFQ

UG1A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 1219UG1A-E3/73 Datasheet

Parametric EquivalentRFQ

UG1A-M3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 987UG1A-M3/73 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF11G-AP is determined by equivalence across the following critical parameters:

• Voltage Rating: 50 V DC reverse voltage (Vr) maximum
• Current Rating: 1 A average rectified current (Io)
• Forward Voltage: 950 mV maximum at 1 A forward current
• Reverse Recovery Time: Fast recovery characteristic (≤ 500 ns for currents > 200 mA)
• Reverse Leakage Current: 5 µA maximum at 50 V
• Package: DO-204AL / DO-41 axial through-hole configuration
• Operating Temperature Range: -55°C to 150°C junction temperature
• Compliance: ROHS3 compliant, REACH unaffected

All substitute parts listed maintain these electrical and mechanical specifications. Substitute parts are grouped by manufacturer and product status (active vs. end-of-life). Automotive-qualified variants are identified separately where applicable.

Parameter Comparison

Engineering Selection Recommendations

For Standard Applications (Non-Automotive):

SF11G A0G (Taiwan Semiconductor Corporation) provides direct parametric equivalence to SF11G-AP with active product status. This part maintains identical electrical specifications and is recommended as the primary substitute for general purpose rectification applications.

UG1A-E3/73 and UG1A-M3/73 (Vishay General Semiconductor - Diodes Division) are active alternatives with improved reverse recovery time (25 ns vs. 35 ns), offering enhanced switching performance while maintaining all other critical parameters. These parts are suitable for applications where faster recovery characteristics provide system benefits.

For Automotive Applications:

SF11GHA0G (Taiwan Semiconductor Corporation) is an automotive-qualified variant carrying AEC-Q101 certification. This part is required for automotive designs and meets all electrical specifications of the SF11G-AP while providing active product support and automotive-grade reliability.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original SF11G-AP. Moisture sensitivity level (MSL) is 1 (Unlimited) across all alternatives, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SF11G A0G be used as a direct replacement for SF11G-AP?

A: Yes. SF11G A0G maintains identical electrical parameters (50 V, 1 A, 950 mV forward voltage, 35 ns recovery time, 5 µA leakage) and is packaged in DO-204AL (DO-41), which is mechanically and electrically equivalent to the original part. The primary difference is active product status versus end-of-life.

Q: What is the difference between SF11G A0G and SF11GHA0G?

A: Both parts are manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications. SF11GHA0G carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. SF11G A0G is standard grade. Selection depends on application requirements.

Q: How do Vishay UG1A-E3/73 and UG1A-M3/73 differ from the SF11G-AP?

A: Vishay parts feature improved reverse recovery time (25 ns vs. 35 ns), resulting in faster switching characteristics. All other parameters—voltage rating, current rating, forward voltage, and leakage current—are identical. The faster recovery time may benefit high-frequency switching applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts are packaged in DO-204AL (DO-41) axial through-hole configuration, which is mechanically and electrically compatible with the original SF11G-AP DO-41 package.

Q: Do substitute parts require different PCB layout or mounting procedures?

A: No. All substitute parts use identical through-hole axial mounting, requiring no changes to PCB layout, hole spacing, or assembly procedures.

Q: Which substitute part should be selected for new designs?

A: SF11G A0G or UG1A-E3/73 are recommended for new designs, as both carry active product status. For automotive applications, SF11GHA0G is the appropriate selection. The choice between standard and Vishay variants depends on whether improved reverse recovery time (25 ns) provides system benefits.

Q: Are there compliance or certification differences between substitute parts?

A: All substitute parts maintain ROHS3 compliance and REACH unaffected status. SF11GHA0G additionally carries AEC-Q101 automotive qualification. Moisture sensitivity level is 1 (Unlimited) for all parts, indicating equivalent handling requirements.