B345AE-13 Equivalent & Substitute Parts

Part Overview

The B345AE-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 45 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 active equivalent parts for new designs and ongoing production requirements. The substitute part maintains functional compatibility within specified electrical and mechanical parameters while offering improved availability and active product status.

Substiute Parts

B345AE-13

Diodes IncorporatedIn Stock: 2847B345AE-13 Datasheet

Current PartRFQ

B350A-13-F

Diodes IncorporatedIn Stock: 35476B350A-13-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B345AE-13 with the B350A-13-F is permissible based on the following criteria:

Electrical Parameter Compatibility:

• Reverse voltage rating of B350A-13-F (50 V) exceeds the B345AE-13 requirement (45 V), providing margin for circuit protection
• Current rating of B350A-13-F (3 A) exceeds the B345AE-13 requirement (2 A), ensuring adequate current handling capacity
• Both devices employ identical Schottky technology with fast recovery characteristics (≤ 500ns, > 200mA)
• Operating temperature range is identical (-55°C to 150°C)

Mechanical Parameter Compatibility:

• Both devices use identical package type: DO-214AC, SMA surface mount
• Both devices are supplied in SMA package configuration
• Physical footprint and mounting requirements are identical

Regulatory Compliance:

• Both devices are ROHS3 compliant
• B350A-13-F includes AEC-Q101 automotive qualification and MSL 1 rating, providing enhanced reliability documentation

The B350A-13-F represents an uprated substitute with superior electrical ratings and active product status, suitable for direct replacement in applications designed for the B345AE-13.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The B345AE-13 is classified as obsolete. The B350A-13-F is an active product with current manufacturing support and 35,400 units in stock, compared to 2,780 units of the obsolete B345AE-13. For new designs and long-term production continuity, the B350A-13-F is the appropriate selection.

Compliance and Qualification: The B350A-13-F includes AEC-Q101 automotive qualification and MSL 1 rating, providing documented reliability and moisture sensitivity specifications. Both devices maintain ROHS3 compliance. The B350A-13-F offers enhanced qualification documentation suitable for regulated applications.

Electrical Performance: The B350A-13-F provides higher voltage and current ratings than required by the B345AE-13 specification. This uprating provides design margin and protection against transient overvoltage conditions. The forward voltage drop increases from 500 mV to 700 mV at higher current (3 A vs. 2 A), which is characteristic of higher-rated Schottky devices and does not preclude substitution in applications designed for the B345AE-13.

Packaging and Mounting: Both devices are identical in package type (DO-214AC, SMA) and mounting configuration (surface mount), requiring no PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the B350A-13-F directly replace the B345AE-13 in existing designs?

A: Yes. The B350A-13-F is electrically and mechanically compatible with the B345AE-13. The higher voltage rating (50 V vs. 45 V) and current rating (3 A vs. 2 A) provide design margin. The identical package type (DO-214AC, SMA) and mounting configuration require no PCB modifications.

Q: What is the significance of the higher forward voltage drop in the B350A-13-F?

A: The B350A-13-F exhibits 700 mV forward voltage drop at 3 A, compared to 500 mV at 2 A for the B345AE-13. This difference is due to the higher current rating and is typical for uprated Schottky diodes. Applications designed for the B345AE-13 operate at lower current levels, where the B350A-13-F forward voltage drop will be correspondingly lower than the specified 700 mV maximum.

Q: Are there any thermal considerations when substituting the B350A-13-F for the B345AE-13?

A: Both devices share identical operating temperature range (-55°C to 150°C). The B350A-13-F is qualified to AEC-Q101 automotive standards, indicating validated thermal performance. No additional thermal analysis is required for direct substitution.

Q: What is the difference in reverse leakage current between these devices?

A: The B345AE-13 specifies 300 µA reverse leakage at 45 V, while the B350A-13-F specifies 500 µA at 50 V. The higher leakage in the B350A-13-F is measured at a higher voltage and is characteristic of higher-rated Schottky devices. For applications operating at the B345AE-13 voltage level (45 V), the B350A-13-F leakage will be lower than the specified maximum.

Q: Does the B350A-13-F require different handling or storage procedures?

A: The B350A-13-F has MSL 1 (Unlimited) moisture sensitivity level, compared to unspecified MSL for the B345AE-13. MSL 1 indicates no moisture sensitivity restrictions. Standard surface mount component handling procedures apply to both devices.

Q: Are both devices RoHS compliant?

A: Yes. Both the B345AE-13 and B350A-13-F are ROHS3 compliant. The B350A-13-F is REACH Unaffected, while the B345AE-13 is REACH Affected. For new designs, the B350A-13-F provides clearer regulatory status.

Q: What is the availability difference between these parts?

A: The B345AE-13 (obsolete) has 2,780 units in stock. The B350A-13-F (active) has 35,400 units in stock with ongoing manufacturing support. For production continuity and new designs, the B350A-13-F is the recommended selection.