Diodes Incorporated B245BE-13

Overview

B245BE-13 from Diodes Incorporated is a 45 V, 2 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.5 V max forward voltage at 2 A and 0.2 mA max reverse leakage at 45 V/25°C. It delivers low conduction loss and stable high-temperature leakage for DC-DC boost stages, solar charge controllers, and 12 V/24 V automotive power supplies.

For engineers reviewing the B245BE-13 datasheet, B245BE-13 pinout, B245BE-13 application, or B245BE-13 equivalent, key selection criteria include its 45 V VRRM rating, SMB thermal resistance (RθJA = 90°C/W), 50 A IFSM surge capability, and RoHS-compliant matte tin finish on copper leadframe.

Technical Context

This Schottky rectifier uses a planar metal–semiconductor junction to achieve low VF and minimal minority-carrier storage, enabling zero-recovery switching in high-frequency rectification. Its junction capacitance is 93 pF at 4 V, supporting operation up to ~10 MHz in snubberless flyback or synchronous rectifier auxiliary paths.

The device is rated for continuous operation from –55°C to +150°C with derated current above 75°C (see Fig. 4), and exhibits <0.2 mA IR at 45 V/125°C - critical for thermal stability in enclosed industrial power modules.

Key Specifications

Pinout & Package

SMB (DO-214AA) surface-mount package: molded green plastic case, UL 94V-0 rated, cathode band marked on top surface. Dimensions: 4.06 × 4.57 × 2.21 mm (L × W × H). Matte tin-plated copper leadframe, polarity indicated by cathode band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS34 and SB240, B245BE-13 provides the highest VRRM (45 V) in SMB form factor while maintaining identical 2 A rating and superior high-temp IR stability - making it optimal for 48 V nominal automotive and industrial power rails.

Availability

B245BE-13 is available at Aetrix Electronics and suitable for automotive power management, solar energy harvesting, industrial DC-DC conversion, and 12 V/24 V embedded power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for B245BE-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, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The B220AE–B245BE series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, high-reliability rectification in cost-sensitive industrial and automotive power applications.

FAQ

What is the maximum junction temperature and how does it affect reliability?

The B245BE-13 has a rated operating junction temperature range of –55°C to +150°C. Its low IR drift with temperature-0.2 mA at 125°C-ensures stable blocking behavior and avoids thermal runaway in enclosed environments. Derating curves (Fig. 4) show usable current drops to ~1.3 A at 100°C ambient, directly impacting thermal design margin.

Is B245BE-13 compatible with lead-free reflow processes?

Yes. The device uses matte tin annealed over copper leadframe and meets J-STD-020 moisture sensitivity level 1. It is qualified for standard Pb-free reflow profiles (peak 260°C, 10 sec), with no special pre-bake required. UL 94V-0 mold compound ensures process compatibility and flame resistance.

How does the SMB package compare thermally to SMA for this part?

The SMB package offers lower thermal resistance than SMA: RθJA = 90°C/W vs. 95°C/W, and RθJC = 40°C/W vs. 45°C/W. This 5–6% improvement reduces junction temperature rise by ~1.2°C at 2 A, enhancing long-term reliability in compact layouts where airflow is limited.

Can B245BE-13 replace B240BE-13 in existing designs?

Yes, with full functional compatibility: both share SMB package, 2 A IO, and identical pinout/polarity. B245BE-13 adds 5 V higher VRRM (45 V vs. 40 V) and same 0.2 mA IR at rated voltage, providing increased voltage margin without layout or thermal changes-ideal for design refreshes targeting 48 V nominal systems.