B350AE-13 Equivalent & Substitute Parts

Part Overview

The B350AE-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 2 A average rectified current in a surface mount SMA package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified ratings suitable for the same application categories.

Substiute Parts

B350AE-13

Diodes IncorporatedIn Stock: 11066B350AE-13 Datasheet

Current PartRFQ

B350A-13-F

Diodes IncorporatedIn Stock: 35476B350A-13-F Datasheet

DirectRFQ

SK35A-LTP

Micro Commercial CoIn Stock: 2121SK35A-LTP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B350AE-13 is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain the 50 V DC reverse voltage maximum rating to ensure safe operation within the same circuit voltage domain.

Package Compatibility: All substitute parts must use the DO-214AC (SMA) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Technology Class: All substitute parts must employ Schottky diode technology to maintain the fast recovery characteristics and forward voltage performance required for rectification applications.

Operating Temperature Range: Substitute parts must support the operating temperature envelope of -55°C to 150°C junction temperature, or a subset thereof that covers the intended application range.

Current Rating: Substitute parts may have equal or higher average rectified current ratings. The B350AE-13 rated at 2 A can be substituted with parts rated at 3 A or higher, as higher current capacity provides design margin without compromising functionality in 2 A applications.

Reverse Leakage and Capacitance: These parameters may vary within acceptable ranges for Schottky diodes of this class. Variations in these parameters do not preclude substitution provided other critical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: B350A-13-F

The B350A-13-F is the recommended substitute for the obsolete B350AE-13. Both parts are manufactured by Diodes Incorporated and share the same base product number (B350), ensuring design continuity. The B350A-13-F is classified as Active product status, ensuring long-term availability and supply chain stability. This part carries AEC-Q101 automotive qualification and Moisture Sensitivity Level 1 (Unlimited), providing enhanced reliability documentation. The B350A-13-F maintains identical voltage rating (50 V), package format (DO-214AC, SMA), operating temperature range (-55°C ~ 150°C), and fast recovery speed characteristics. The increased current rating (3 A versus 2 A) and higher forward voltage (700 mV @ 3 A versus 650 mV @ 2 A) are acceptable for applications designed around the B350AE-13, as the higher current capacity provides design margin. Both parts are ROHS3 compliant.

Secondary Substitute: SK35A-LTP

The SK35A-LTP manufactured by Micro Commercial Co is a functional substitute that meets the core electrical requirements: 50 V reverse voltage rating, 3 A current capacity, DO-214AC (SMA) package, and fast recovery Schottky technology. However, this part is classified as Not For New Designs, limiting its suitability for new product development. The operating temperature range (-50°C ~ 125°C) is narrower than the B350AE-13 (-55°C ~ 150°C), which may restrict application in extreme temperature environments. The forward voltage is higher (750 mV @ 3 A), and capacitance is increased (250pF @ 4V, 1MHz). This part is suitable only for legacy system maintenance or applications where the narrower temperature range is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the B350A-13-F directly replace the B350AE-13 in existing designs?

A: Yes. The B350A-13-F maintains identical voltage rating (50 V), package format (DO-214AC, SMA), operating temperature range (-55°C ~ 150°C), and fast recovery speed. The higher current rating (3 A) and slightly elevated forward voltage (700 mV @ 3 A) do not prevent direct substitution in applications designed for the 2 A B350AE-13, as the higher current capacity provides additional design margin.

Q: What is the difference between the B350A-13-F and SK35A-LTP?

A: Both parts share the same 50 V voltage rating, 3 A current capacity, and DO-214AC (SMA) package. The B350A-13-F is manufactured by Diodes Incorporated with Active product status and full -55°C ~ 150°C temperature range support. The SK35A-LTP is manufactured by Micro Commercial Co, classified as Not For New Designs, with a narrower operating temperature range (-50°C ~ 125°C) and higher forward voltage (750 mV @ 3 A). The B350A-13-F is the preferred choice for new designs.

Q: Are there any compliance or certification differences between these parts?

A: The B350A-13-F carries AEC-Q101 automotive qualification and Moisture Sensitivity Level 1 (Unlimited), providing enhanced reliability documentation suitable for automotive and high-reliability applications. The SK35A-LTP does not list automotive qualification. Both parts are ROHS3 compliant. The B350A-13-F is REACH Unaffected, while the B350AE-13 is REACH Affected.

Q: Can I use the SK35A-LTP in applications requiring the full -55°C ~ 150°C temperature range?

A: No. The SK35A-LTP operating temperature range is -50°C ~ 125°C, which does not cover the full -55°C ~ 150°C envelope of the B350AE-13. Applications requiring operation below -50°C or above 125°C must use the B350A-13-F or equivalent parts with the extended temperature range.

Q: What is the impact of higher forward voltage in substitute parts?

A: The B350A-13-F has forward voltage of 700 mV @ 3 A compared to 650 mV @ 2 A for the B350AE-13. The SK35A-LTP has 750 mV @ 3 A. Higher forward voltage results in increased power dissipation in the diode. For applications with tight thermal budgets, thermal analysis should confirm that the increased dissipation remains within acceptable limits. In most rectification applications, this difference is negligible.

Q: Does the increased capacitance in substitute parts affect circuit performance?

A: The B350A-13-F has capacitance of 200pF @ 4V, 1MHz compared to 125pF for the B350AE-13. The SK35A-LTP has 250pF @ 4V, 1MHz. Higher capacitance may affect high-frequency switching performance or introduce additional charge storage effects. For applications operating at frequencies below 1 MHz or in rectification circuits where switching speed is not critical, this difference is typically acceptable. High-frequency applications should evaluate the impact through circuit simulation or testing.

Q: What is the significance of reverse leakage current differences?

A: The B350AE-13 has reverse leakage of 100 µA @ 50 V, while both substitute parts have 500 µA @ 50 V. Higher reverse leakage increases standby power consumption and may affect precision analog circuits. For power rectification and switching applications, this difference is typically negligible. Precision analog applications should evaluate the impact on circuit performance.

Q: Are these parts pin-compatible?

A: Yes. All three parts use the DO-214AC (SMA) surface mount package, which has identical pin configuration and footprint. Direct PCB layout substitution is possible without modification to the circuit board.