B345BE-13 Equivalent & Substitute Parts

Part Overview

The B345BE-13 is a Schottky rectifier diode rated for 45 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMB package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing design and procurement requirements. The part is ROHS3 Compliant and REACH Affected.

Substiute Parts

B345BE-13

Diodes IncorporatedIn Stock: 30424B345BE-13 Datasheet

Current PartRFQ

B350B-13-F

Diodes IncorporatedIn Stock: 10449B350B-13-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The B350B-13-F qualifies as a direct substitute for the B345BE-13 based on the following allowed electrical and mechanical parameters:

Matching Parameters:

• Current - Average Rectified (Io): 3 A (identical)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (identical)
• Package / Case: DO-214AA, SMB (identical)
• Operating Temperature - Junction: -55°C ~ 150°C (identical)
• Technology: Schottky (identical)
• Mounting Type: Surface Mount (identical)

Differing Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V (substitute) vs. 45 V (main part)
• Voltage - Forward (Vf) (Max) @ If: 700 mV @ 3 A (substitute) vs. 500 mV @ 3 A (main part)
• Current - Reverse Leakage @ Vr: 500 µA @ 50 V (substitute) vs. 300 µA @ 45 V (main part)
• Capacitance @ Vr, F: 200pF @ 4V, 1MHz (substitute) vs. 140pF @ 4V, 1MHz (main part)

The B350B-13-F operates at a higher voltage rating and exhibits higher forward voltage drop and reverse leakage characteristics. These differences must be evaluated within the context of the specific application circuit.

Parameter Comparison

Engineering Selection Recommendations

The B350B-13-F is an Active product with REACH Unaffected status, providing regulatory advantage over the Obsolete B345BE-13. Both parts maintain ROHS3 Compliance and identical EAR99 and HTSUS classifications.

The B350B-13-F exhibits a higher voltage rating (50 V vs. 45 V), which provides additional design margin in applications where reverse voltage stress is a consideration. However, the increased forward voltage drop (700 mV vs. 500 mV at 3 A) results in higher power dissipation. The higher reverse leakage current (500 µA @ 50 V vs. 300 µA @ 45 V) and increased capacitance (200pF vs. 140pF) must be evaluated for applications sensitive to leakage or switching performance.

Selection of the B350B-13-F is appropriate for applications where the higher voltage rating and Active product status outweigh the increased forward voltage drop and leakage characteristics. Applications with strict power dissipation or leakage requirements may require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the B350B-13-F directly replace the B345BE-13 in all applications?

A: The B350B-13-F shares identical current rating, package, mounting type, and operating temperature range. However, the higher forward voltage drop (700 mV vs. 500 mV) and reverse leakage current (500 µA vs. 300 µA) must be evaluated within the specific circuit context. Applications with tight power budgets or leakage-sensitive designs require circuit analysis.

Q: What is the significance of the voltage rating difference?

A: The B350B-13-F operates at 50 V maximum reverse voltage compared to 45 V for the B345BE-13. This higher rating provides additional margin against reverse voltage stress but does not affect forward biased operation in standard rectification circuits.

Q: Are the SMB packages identical between these parts?

A: Both parts use the DO-214AA, SMB package designation. Mechanical compatibility and PCB footprint requirements are identical.

Q: What is the impact of the forward voltage difference on circuit performance?

A: The 200 mV increase in forward voltage drop (from 500 mV to 700 mV at 3 A) results in proportionally higher power dissipation. In a 3 A circuit, this represents an additional 600 mW of heat generation. Thermal management and efficiency calculations must account for this difference.

Q: Why is the B345BE-13 classified as Obsolete?

A: The B345BE-13 is listed as Obsolete, indicating discontinued manufacturing. The B350B-13-F, classified as Active, represents the current production equivalent from Diodes Incorporated.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 Compliant. The B350B-13-F is REACH Unaffected, while the B345BE-13 is REACH Affected. This provides regulatory advantage for the substitute part in applications subject to REACH restrictions.