SF11G Equivalent & Substitute Parts

Part Overview

The SF11G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-204AL (DO-41) through-hole axial package. This component is classified as a fast recovery diode with a reverse recovery time of 35 nanoseconds, suitable for applications requiring rapid switching characteristics. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are maintained across the specified parameter set.

Substiute Parts

SF11G

Taiwan Semiconductor CorporationIn Stock: 663SF11G Datasheet

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1N4001G

Taiwan Semiconductor CorporationIn Stock: 16011N4001G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

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

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Current - Reverse Leakage @ Vr: 5 µA maximum at 50 V
• Operating Temperature - Junction: -55°C to 150°C minimum range

Mechanical Equivalence Criteria:

• Package / Case: DO-204AL (DO-41) Axial configuration
• Mounting Type: Through Hole

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant
• Product Status: Active

The 1N4001G meets all electrical and mechanical equivalence criteria. Variations in forward voltage (Vf), reverse recovery time (trr), and capacitance do not disqualify substitution when the primary ratings remain equal or superior.

Parameter Comparison

Engineering Selection Recommendations

SF11G Primary Selection: The SF11G is the specified component and maintains Active product status with full RoHS3 compliance. This part is suitable for applications requiring fast recovery characteristics with a 35 nanosecond reverse recovery time.

1N4001G Substitution: The 1N4001G is electrically and mechanically equivalent to the SF11G across all critical parameters: 50 V reverse voltage rating, 1 A average rectified current, 5 µA reverse leakage current, and identical operating temperature range. Both parts are manufactured by Taiwan Semiconductor Corporation and maintain ROHS3 compliance with Active product status. The 1N4001G is classified as a standard recovery diode with recovery time exceeding 500 nanoseconds, which differs from the SF11G fast recovery specification. This substitution is valid for applications where standard recovery characteristics are acceptable. The 1N4001G forward voltage is specified at 1 V compared to 950 mV for the SF11G, representing a 50 millivolt difference at 1 A forward current.

Frequently Asked Questions (FAQ)

Q: Can the 1N4001G replace the SF11G in all applications?

A: The 1N4001G meets all primary electrical and mechanical equivalence criteria: 50 V reverse voltage, 1 A current rating, identical reverse leakage current, and compatible DO-204AL through-hole packaging. The primary difference is recovery speed classification. The SF11G is rated as fast recovery (≤ 500 ns), while the 1N4001G is standard recovery (> 500 ns). Substitution is valid when application requirements do not mandate fast recovery performance.

Q: What is the significance of the forward voltage difference between SF11G and 1N4001G?

A: The SF11G specifies 950 mV maximum forward voltage at 1 A, while the 1N4001G specifies 1 V maximum at the same current. This 50 millivolt difference represents approximately 5 percent variation and falls within normal manufacturing tolerance ranges for general-purpose rectifier diodes. Both values are acceptable for standard rectification applications.

Q: Are both parts available in the same packaging format?

A: Both the SF11G and 1N4001G are supplied in DO-204AL (DO-41) axial through-hole packages. The SF11G is available in bulk form, while the 1N4001G is supplied in Tape & Reel (TR) format. Both mounting types are compatible with through-hole PCB assembly processes.

Q: What compliance certifications apply to both parts?

A: Both the SF11G and 1N4001G maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH Unaffected status. Both parts are classified under ECCN EAR99 and HTSUS 8541.10.0080. Compliance equivalence is confirmed across all regulatory frameworks.

Q: How do the reverse recovery time specifications affect circuit performance?

A: Reverse recovery time (trr) determines the speed at which a diode transitions from forward conduction to reverse blocking. The SF11G specifies 35 nanoseconds, while the 1N4001G does not provide this specification and is classified as standard recovery (> 500 ns). In high-frequency switching applications, the SF11G provides superior performance. In low-frequency rectification circuits, this difference is not operationally significant.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, both parts are mechanically and electrically compatible for PCB designs utilizing DO-204AL through-hole axial packages. No PCB layout modifications are required for substitution. Component orientation and lead spacing are identical between both parts.