Diodes Incorporated B245AE-13

Overview

B245AE-13 from Diodes Incorporated is a 2.0A, 45V Schottky barrier rectifier in SMA package, featuring 0.50V max forward voltage at 2A and 0.2mA max reverse leakage at 45V/25°C. It delivers low conduction loss and stable high-temperature leakage performance for DC-DC boost stages, solar charge controllers, and industrial power supplies.

For engineers reviewing the B245AE-13 datasheet, B245AE-13 pinout, B245AE-13 application, or B245AE-13 equivalent, key selection criteria include forward voltage at rated current, reverse leakage at operating temperature, thermal resistance (RθJA = 95°C/W), junction capacitance (93pF), and RoHS-compliant green packaging.

Technical Context

This Schottky rectifier uses a planar metal-semiconductor junction to achieve low VF and fast switching with no minority-carrier storage delay. Its 45V VRRM rating supports 36V nominal input systems with margin, and its 50A IFSM withstands transient surge events in automotive and industrial environments.

The device operates across –55°C to +150°C, with reverse leakage tightly controlled up to 125°C (IR ≤ 0.2mA at VR = 45V). Thermal resistance of 95°C/W (SMA, FR-4 board) enables reliable operation at full 2A load without forced airflow in compact enclosures.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin–annealed copper leadframe; cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS24-E3/57T and SB240-E3/57T, B245AE-13 provides superior thermal efficiency (lower VF) and system-level robustness (higher VRRM), making it optimal for 36V-input boost converters and industrial power supplies where margin and efficiency are critical.

Availability

B245AE-13 is available at Aetrix Electronics and suitable for boost diode, blocking diode, recirculating diode, and industrial power supply output rectifier applications requiring stable component supply and RoHS-compliant green packaging.

Supply support for B245AE-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, specializing in high-reliability power management and signal integrity solutions for industrial, computing, and consumer markets.

The B245AE-13 belongs to the B220AE–B245AE Schottky rectifier product line, engineered for high-efficiency, high-temperature-stable rectification in space-constrained power conversion stages.

FAQ

What is the maximum junction temperature for continuous operation of B245AE-13?

The B245AE-13 has an operating junction temperature range of –55°C to +150°C. At full 2A DC load on a standard FR-4 PCB (0.4" × 0.5", 2oz copper), junction temperature rise is approximately 190°C above ambient (95°C/W × 2A² × RDS(on) ≈ 190°C), so derating is required above ~–40°C ambient to stay within 150°C limit. Derating curves in Figure 4 confirm 2A is valid up to 70°C ambient.

Is B245AE-13 suitable for use in automotive under-hood applications?

B245AE-13 meets the –55°C to +150°C operating temperature range required for many automotive under-hood locations. However, it is not AEC-Q101 qualified. For production automotive use, Diodes Incorporated's AEC-Q101-certified equivalents (e.g., B245AERQ-13) should be selected instead; B245AE-13 is appropriate for prototyping and non-safety-critical aftermarket designs.

How does the SMA package of B245AE-13 compare thermally with SMB?

The SMA package has RθJA = 95°C/W versus SMB's 90°C/W on identical test boards, meaning SMB offers slightly better natural convection cooling. However, SMA's smaller footprint (2.29–2.92mm × 4.00–4.60mm) saves board area, and its RθJC = 45°C/W enables more effective heat transfer to internal copper layers than SMB's 40°C/W - making SMA preferable when PCB thermal vias are used.

Can B245AE-13 replace B240AE-13 in an existing design?

Yes - B245AE-13 is a direct upgrade from B240AE-13, sharing identical package (SMA), pinout, and electrical characteristics except for increased VRRM (45V vs. 40V). All other parameters (VF, IR, IFSM, thermal resistance) are unchanged. No layout or firmware changes are needed; the higher blocking voltage improves margin against input transients in 36V systems.