B345CE-13 Equivalent & Substitute Parts

Part Overview

The B345CE-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 45 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This component is classified as Obsolete, indicating discontinuation from active production. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode specification.

Substiute Parts

B345CE-13

Diodes IncorporatedIn Stock: 1075B345CE-13 Datasheet

Current PartRFQ

B350-13-F

Diodes IncorporatedIn Stock: 16404B350-13-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B345CE-13 is determined by electrical and mechanical compatibility within the Schottky rectifier diode category. The primary substitution candidate is the B350-13-F, manufactured by Diodes Incorporated. Substitution logic is based on the following criteria:

Electrical Compatibility Parameters:

• Technology: Both parts utilize Schottky rectifier technology
• Current Rating: Both parts support 3 A average rectified current (Io)
• Package Type: Both parts use DO-214AB SMC surface mount package
• Speed Classification: Both parts meet Fast Recovery ≤ 500ns specification for currents > 200mA
• Operating Temperature Range: Both parts operate within -55°C to 125°C minimum (B345CE-13 extends to 150°C)
• RoHS Compliance: Both parts are ROHS3 Compliant

Voltage Rating Consideration: The B350-13-F is rated for 50 V DC reverse voltage, which exceeds the 45 V specification of the B345CE-13. This higher voltage rating permits direct substitution in applications designed for 45 V operation, as the substitute part maintains backward compatibility with lower voltage requirements.

Differences Requiring Evaluation:

• Forward voltage drop increases from 500 mV to 700 mV at 3 A
• Reverse leakage current increases from 300 µA to 500 µA
• Capacitance increases from 140pF to 200pF
• Product status transitions from Obsolete to Active
• Maximum junction temperature reduces from 150°C to 125°C

Parameter Comparison

Engineering Selection Recommendations

B350-13-F as Primary Substitute:

The B350-13-F is the direct substitute for the B345CE-13 based on product status and compliance certifications. The B345CE-13 is classified as Obsolete, while the B350-13-F maintains Active product status with current manufacturing support and availability. Both parts are ROHS3 Compliant and carry identical ECCN and HTSUS classifications, ensuring regulatory and trade compliance equivalence.

Electrical Performance Considerations:

The B350-13-F operates at a higher reverse voltage rating (50 V versus 45 V), providing enhanced voltage margin for the application. However, the forward voltage drop increases by 200 mV at rated current (700 mV versus 500 mV at 3 A), which affects power dissipation and thermal performance. The reverse leakage current increases from 300 µA to 500 µA, and junction capacitance increases from 140pF to 200pF. These parameter shifts remain within the functional scope of Schottky rectifier technology and do not preclude substitution in standard rectification applications.

Thermal Operating Range:

The B350-13-F maximum junction temperature is 125°C, compared to 150°C for the B345CE-13. Applications operating near the upper thermal limit of the original design require thermal analysis to confirm compatibility with the reduced maximum junction temperature specification.

Supply Chain Status:

The B350-13-F is available in Tape & Reel packaging with 16,316 units in stock, providing reliable supply continuity for production requirements. The B345CE-13, while currently in stock (968 units), is discontinued and subject to depletion without replenishment.

Frequently Asked Questions (FAQ)

Q: Can the B350-13-F directly replace the B345CE-13 in existing designs?

A: The B350-13-F is electrically and mechanically compatible with the B345CE-13 for standard rectification applications. Both parts share identical current ratings (3 A), package type (DO-214AB SMC), and speed classification (Fast Recovery ≤ 500ns). The higher voltage rating of the B350-13-F (50 V versus 45 V) provides backward compatibility. However, the increased forward voltage drop (200 mV higher at 3 A) and reduced maximum junction temperature (125°C versus 150°C) require design verification for applications operating at thermal or power dissipation limits.

Q: What is the impact of the increased forward voltage drop?

A: The B350-13-F exhibits a forward voltage drop of 700 mV at 3 A, compared to 500 mV for the B345CE-13. This 200 mV increase results in higher power dissipation in the diode during conduction. For a 3 A load, the additional power dissipation is 0.6 W. Applications with thermal constraints or high-frequency switching must evaluate whether this additional dissipation remains within acceptable limits for the circuit design.

Q: Are there packaging differences between these parts?

A: Both parts use the DO-214AB SMC surface mount package and are compatible with identical PCB layouts and reflow soldering processes. The B345CE-13 is supplied in standard packaging, while the B350-13-F is available in Tape & Reel format for automated assembly. This packaging difference does not affect electrical or mechanical compatibility.

Q: What is the significance of the product status change from Obsolete to Active?

A: The B345CE-13 is classified as Obsolete, indicating discontinuation from active manufacturing. The B350-13-F maintains Active status with ongoing production support. Substitution to the B350-13-F ensures long-term supply availability and access to current manufacturing quality standards and certifications.

Q: How do the reverse leakage current specifications compare?

A: The B345CE-13 specifies 300 µA reverse leakage at 45 V, while the B350-13-F specifies 500 µA at 50 V. The higher leakage current in the substitute part is typical for higher voltage-rated Schottky diodes. For applications sensitive to reverse leakage (such as precision analog circuits), this parameter difference requires circuit-level analysis to confirm acceptable performance.

Q: Are both parts RoHS and REACH compliant?

A: Both parts are ROHS3 Compliant. The B345CE-13 is REACH Affected, while the B350-13-F is REACH Unaffected. Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, ensuring regulatory equivalence for export and trade compliance purposes.