SF10BG-A Equivalent & Substitute Parts

Part Overview

The SF10BG-A is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part exhibits fast recovery characteristics with a reverse recovery time of 35 ns, suitable for applications requiring rapid switching performance.

Substiute Parts

SF10BG-A

Diodes IncorporatedIn Stock: 834SF10BG-A Datasheet

Current PartRFQ

1N4002B-G

Comchip TechnologyIn Stock: 83551N4002B-G Datasheet

MFR RecommendedRFQ

EGP10B-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 2381EGP10B-E3/73 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF10BG-A is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 100 V
• Current - Average Rectified (Io): 1 A
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial

Performance Characteristics:

• Forward voltage drop (Vf) at rated current
• Reverse recovery time (trr) and speed classification
• Reverse leakage current
• Operating temperature range

Substitute parts must satisfy all mandatory equivalence criteria. Performance characteristics may vary within acceptable engineering tolerances for the application context, provided the part remains functionally compatible with the original design specifications.

Parameter Comparison

Engineering Selection Recommendations

1N4002B-G (Comchip Technology)

The 1N4002B-G is an active product offering full parametric equivalence in voltage and current ratings. This part is classified as the manufacturer-recommended substitute. Key considerations include:

• Forward voltage drop of 1.1 V at 1 A represents a 150 mV increase relative to the SF10BG-A
• Speed classification differs: standard recovery (> 500 ns) versus fast recovery (≤ 500 ns) of the original
• Operating temperature minimum of -55°C versus -65°C for the original part
• Reverse leakage current is improved at 5 µA versus 10 µA
• ROHS3 compliant with unlimited moisture sensitivity level
• Bulk packaging available with 8304 units in stock

EGP10B-E3/73 (Vishay General Semiconductor - Diodes Division)

The EGP10B-E3/73 is classified as a parametric equivalent and represents an active product. This part maintains closer performance alignment with the original:

• Forward voltage drop of 950 mV at 1 A matches the SF10BG-A specification
• Fast recovery speed classification (≤ 500 ns) aligns with original performance
• Reverse recovery time of 50 ns is within acceptable variance of the 35 ns original specification
• Operating temperature range of -65°C to 150°C matches the original
• Reverse leakage current of 5 µA is improved
• ROHS3 compliant with unlimited moisture sensitivity level
• Part of the SUPERECTIFIER® series with 2300 units in stock

Both substitute parts satisfy mandatory equivalence criteria for voltage, current, mounting type, and package configuration. Selection between these options depends on application sensitivity to forward voltage drop, recovery speed characteristics, and temperature operating range requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1N4002B-G replace the SF10BG-A in all applications?

A: The 1N4002B-G meets the mandatory equivalence criteria of 100 V reverse voltage, 1 A average rectified current, through-hole mounting, and DO-41 package. However, the forward voltage drop increases from 950 mV to 1.1 V, and the speed classification changes from fast recovery to standard recovery. Applications sensitive to switching speed or power dissipation must evaluate these differences.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have a reverse recovery time of 500 ns or less and are suitable for high-frequency switching applications. Standard recovery diodes exceed 500 ns reverse recovery time and are appropriate for lower-frequency rectification. The SF10BG-A and EGP10B-E3/73 are fast recovery devices, while the 1N4002B-G is standard recovery.

Q: Are all three parts physically interchangeable?

A: Yes. All three parts use the DO-41 axial through-hole package and can be mounted in identical PCB footprints. Physical interchangeability is confirmed across all substitute options.

Q: Does the operating temperature range difference between -55°C and -65°C affect substitution?

A: The 1N4002B-G has a minimum operating temperature of -55°C versus -65°C for the SF10BG-A and EGP10B-E3/73. Applications requiring operation below -55°C must use the EGP10B-E3/73 or original part. Applications operating above -55°C are unaffected by this difference.

Q: Why is the reverse leakage current lower in the substitute parts?

A: The 1N4002B-G and EGP10B-E3/73 both specify 5 µA reverse leakage at 100 V, compared to 10 µA for the SF10BG-A. Lower reverse leakage current represents improved device performance and does not create compatibility issues in substitution.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates the parts meet the Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, hexavalent chromium, and certain flame retardants. All three parts are ROHS3 compliant, ensuring regulatory alignment.

Q: Is the SF10BG-A still available for procurement?

A: The SF10BG-A is classified as obsolete. While 792 units are listed as in stock, long-term availability is not guaranteed. The 1N4002B-G and EGP10B-E3/73 are active products with significantly higher inventory levels (8304 and 2300 units respectively), ensuring sustained procurement availability.