SB350-B Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB350-B is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 50V DC reverse voltage and 3A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The SB350-B remains available in inventory but is no longer in active production status.

Substiute Parts

SB350-B

Diodes IncorporatedIn Stock: 753SB350-B Datasheet

Current PartRFQ

SB350-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 21039SB350-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SB350-B is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50V
• Current - Average Rectified (Io): 3A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 50V
• Operating Temperature - Junction: -65°C to 150°C

Mechanical Equivalence Criteria:

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

Compliance Equivalence Criteria:

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

The SB350-E3/54 manufactured by Vishay General Semiconductor - Diodes Division meets all electrical and mechanical substitution criteria. This part maintains identical voltage and current ratings, package configuration, and temperature operating range. The forward voltage specification of the SB350-E3/54 (680 mV @ 3A) is within acceptable tolerance relative to the SB350-B (740 mV @ 3A), representing improved performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SB350-E3/54 is the direct equivalent substitute for the obsolete SB350-B. Both components share identical electrical ratings, mechanical packaging, and thermal operating ranges. The SB350-E3/54 maintains active product status with Vishay General Semiconductor - Diodes Division, ensuring ongoing availability and supply chain continuity.

Both parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating equivalent environmental and handling requirements. The SB350-E3/54 is supplied in Cut Tape (CT) packaging format, which differs from the SB350-B packaging designation but does not affect functional compatibility in through-hole applications.

The forward voltage characteristic of the SB350-E3/54 (680 mV @ 3A) represents a 60 mV improvement over the SB350-B specification (740 mV @ 3A), resulting in lower power dissipation and improved thermal performance in equivalent circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the SB350-E3/54 be used as a direct replacement for the SB350-B in existing designs?

A: Yes. The SB350-E3/54 meets all electrical and mechanical specifications of the SB350-B. Both components are rated for 50V DC reverse voltage, 3A average rectified current, and utilize the DO-201AD axial through-hole package. Circuit board layouts and component footprints require no modification.

Q: What is the significance of the different forward voltage ratings between these parts?

A: The SB350-E3/54 exhibits a lower forward voltage (680 mV @ 3A) compared to the SB350-B (740 mV @ 3A). This 60 mV difference results in reduced power dissipation during operation. For most applications, this represents improved performance. Circuit designs that depend on specific forward voltage characteristics should evaluate this parameter within their thermal and efficiency calculations.

Q: Are there packaging differences between the SB350-B and SB350-E3/54?

A: Both components use the DO-201AD axial through-hole package. The SB350-B and SB350-E3/54 are mechanically and electrically interchangeable in through-hole PCB applications. The SB350-E3/54 is supplied in Cut Tape (CT) format, which is a standard packaging and handling method that does not affect component functionality.

Q: What compliance certifications apply to both parts?

A: Both the SB350-B and SB350-E3/54 are ROHS3 compliant and carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited). These certifications indicate equivalent environmental compliance and handling requirements. No additional compliance considerations are introduced by substitution.

Q: Why is the SB350-B classified as obsolete?

A: The SB350-B is no longer in active production by Diodes Incorporated. The SB350-E3/54 from Vishay General Semiconductor - Diodes Division is the active equivalent product, ensuring continued availability and supply chain support for this 50V, 3A Schottky diode specification.

Q: Are the reverse leakage current specifications identical?

A: Yes. Both the SB350-B and SB350-E3/54 specify 500 µA reverse leakage current at 50V. This parameter is critical for applications requiring low standby current or high impedance blocking characteristics, and both parts perform identically in this regard.

Q: What is the operating temperature range for both components?

A: Both the SB350-B and SB350-E3/54 operate across a junction temperature range of -65°C to 150°C. This identical specification ensures equivalent thermal performance and reliability across the full operating temperature spectrum.