B350AF-13 Equivalent & Substitute Parts

Part Overview

The B350AF-13 is an active Schottky rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 3 A average rectified current in a surface mount SMAF package. This component is designed for fast recovery applications requiring low forward voltage drop and rapid switching characteristics. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

B350AF-13

Diodes IncorporatedIn Stock: 15237B350AF-13 Datasheet

Current PartRFQ

VSSAF5N50-M3/6A

Vishay General Semiconductor - Diodes DivisionIn Stock: 4719VSSAF5N50-M3/6A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the B350AF-13 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 3 A minimum
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: DO-221AC, SMA Flat Leads

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

The VSSAF5N50-M3/6A from Vishay General Semiconductor - Diodes Division meets all critical electrical and mechanical requirements. Both components share identical voltage and current ratings, Schottky technology, fast recovery speed classification, and surface mount DO-221AC packaging. Both are active products with ROHS3 compliance and MSL 1 rating, ensuring direct substitution capability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the B350AF-13 and VSSAF5N50-M3/6A are active products with ROHS3 compliance and MSL 1 rating, confirming suitability for current manufacturing and assembly processes. The components share identical voltage and current specifications, Schottky technology classification, and fast recovery speed characteristics, establishing direct electrical equivalence.

The VSSAF5N50-M3/6A demonstrates lower forward voltage drop (410 mV @ 2.5 A versus 650 mV @ 3 A) and reduced reverse leakage current (1.4 mA @ 50 V versus 200 µA @ 50 V), indicating potential efficiency improvements in specific circuit topologies. The B350AF-13 supports a wider operating temperature range (-55°C to 150°C versus -40°C to 150°C), which may be required for extended temperature applications.

Selection between these components should be based on specific circuit requirements regarding forward voltage characteristics, reverse leakage performance, and operating temperature range. Both components are qualified for direct substitution in DO-221AC surface mount applications requiring 50 V, 3 A Schottky rectification with fast recovery characteristics.

Frequently Asked Questions (FAQ)

Q: Can the VSSAF5N50-M3/6A directly replace the B350AF-13 in existing designs?

A: Yes. Both components share identical voltage ratings (50 V), current ratings (3 A), Schottky technology, fast recovery speed classification, and DO-221AC surface mount packaging. Electrical and mechanical compatibility is established. Circuit performance may differ due to variations in forward voltage drop and reverse leakage characteristics.

Q: What are the key differences between these two diodes?

A: The primary differences are forward voltage drop (B350AF-13: 650 mV @ 3 A; VSSAF5N50-M3/6A: 410 mV @ 2.5 A), reverse leakage current (B350AF-13: 200 µA @ 50 V; VSSAF5N50-M3/6A: 1.4 mA @ 50 V), junction capacitance (B350AF-13: 110 pF; VSSAF5N50-M3/6A: 850 pF), and operating temperature range (B350AF-13: -55°C to 150°C; VSSAF5N50-M3/6A: -40°C to 150°C).

Q: Are both components RoHS compliant?

A: Yes. Both the B350AF-13 and VSSAF5N50-M3/6A are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.

Q: What packaging format is used for both components?

A: Both components use DO-221AC surface mount packaging with SMA flat leads, also designated as SMAF (B350AF-13) and SlimSMA (VSSAF5N50-M3/6A). The physical footprint and lead configuration are compatible for PCB assembly.

Q: Which component should be selected for low-temperature applications below -40°C?

A: The B350AF-13 supports operating temperatures down to -55°C, making it suitable for applications requiring extended low-temperature performance. The VSSAF5N50-M3/6A is rated to -40°C minimum.

Q: How do the forward voltage characteristics compare?

A: The B350AF-13 specifies 650 mV maximum forward voltage at 3 A, while the VSSAF5N50-M3/6A specifies 410 mV maximum at 2.5 A. Lower forward voltage in the Vishay component results in reduced power dissipation in applications operating near rated current levels.