Diodes Incorporated B345CE-13

Overview

B345CE-13 from Diodes Incorporated is a 45 V, 3 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.5 V max forward voltage at 3 A and 0.30 mA max reverse leakage at 45 V/25°C, optimized for high-efficiency DC-DC boost stages in industrial power supplies.

For engineers reviewing the B345CE-13 datasheet, B345CE-13 pinout, B345CE-13 application, or B345CE-13 equivalent, key selection criteria include thermal resistance (70°C/W junction-to-ambient), high-temperature reverse leakage stability up to +150°C, and RoHS-compliant matte tin terminations suitable for lead-free reflow.

Technical Context

This Schottky rectifier uses a planar epitaxial construction with low-barrier metal-semiconductor junction to achieve low forward voltage drop and fast switching recovery (<10 ns). Its design targets continuous conduction mode (CCM) operation in 100–500 kHz DC-DC converters where conduction loss minimization is critical.

The device exhibits thermally stable reverse leakage-0.30 mA at 25°C rising to ≤30 mA at 125°C under 45 V bias-enabling reliable operation in ambient temperatures up to +150°C without thermal runaway, supported by 30°C/W junction-to-case thermal resistance in the SMC package.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), molded plastic case with UL 94V-0 rating, matte tin-plated copper leadframe, cathode band marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with SS34H and SB340, B345CE-13 provides tighter 45 V blocking margin and lower leakage at elevated temperature-critical for high-reliability 24 V/48 V systems operating near thermal limits.

Availability

B345CE-13 is available at Aetrix Electronics and suitable for industrial power supplies, solar charge controllers, and automotive LED drivers requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for B345CE-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1960.

The B320BE–B345CE series belongs to Diodes' high-reliability Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature rectification in space-constrained power conversion systems.

FAQ

What is the maximum junction temperature for continuous operation?

The B345CE-13 has an operating junction temperature range of –55°C to +150°C. Continuous operation at TJ = +150°C is permitted provided the average forward current is derated to ≤1.2 A per Figure 4 in the datasheet, based on thermal resistance and ambient conditions.

Is B345CE-13 compatible with lead-free reflow soldering profiles?

Yes. The device features matte tin annealed terminations qualified to JEDEC J-STD-020 moisture sensitivity Level 1 and supports peak reflow temperatures up to 260°C for 30 seconds, meeting IPC/JEDEC Class 3 requirements for lead-free assembly.

How does the reverse leakage compare at elevated temperature?

At VR = 45 V, IR rises from 0.30 mA at +25°C to ≤30 mA at +125°C and ≤100 mA at +150°C, as shown in Figure 2. This controlled increase avoids thermal runaway due to the device's low RθJC (30°C/W) and stable Schottky barrier.

Can B345CE-13 replace B340CE-13 in existing designs?

Yes, with functional improvement: B345CE-13 offers +5 V higher VRRM (45 V vs. 40 V) and identical VF, IO, and package. No layout or thermal changes are needed, and the higher blocking margin improves robustness against input transients in 36–48 V systems.