Diodes Incorporated B280AE-13

Overview

B280AE-13 from Diodes Incorporated is a 80 V, 2.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.79 V max forward voltage at 2.0 A and 7 µA max reverse leakage at 25°C, optimized for polarity protection and DC-DC converter freewheeling paths in industrial power supplies.

For engineers reviewing the B280AE-13 datasheet, B280AE-13 pinout, B280AE-13 application, or B280AE-13 equivalent, key selection criteria include its low VF/IR trade-off, thermal resistance (RθJA = 110°C/W), guard ring die construction for transient robustness, and RoHS-compliant matte tin plating for automated reflow assembly.

Technical Context

This Schottky rectifier uses a planar guard ring die structure to suppress edge breakdown under high dv/dt transients, enabling reliable operation in switching power supplies with fast turn-off MOSFETs. Its low junction capacitance (70 pF @ 4 V, 1 MHz) supports high-frequency rectification up to several hundred kHz.

The device operates across –65°C to +150°C, with derated forward current (e.g., ~1.4 A at 100°C ambient) and stable leakage performance (0.4 mA max at 125°C), making it suitable for thermally constrained PCB layouts where SMB alternatives offer lower RθJA but larger footprint.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), surface-mount plastic case with cathode band marking; dimensions: 4.00–4.60 mm (L) × 2.29–2.92 mm (W) × 1.27–1.63 mm (H); weight ≈ 0.063 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS28-E3/5AT and SB280-E3/57T, B280AE-13 delivers the lowest VF in SMA form factor and best thermal efficiency per mm², making it optimal for space-constrained 24–48 V industrial power rails where leakage and transient immunity are critical.

Availability

B280AE-13 is available at Aetrix Electronics and suitable for polarity protection, DC-DC freewheeling, and AC-DC output rectification requiring stable component supply and long-term industrial lifecycle support.

Supply support for B280AE-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 centers across Asia and manufacturing in China, Taiwan, and the US.

The B280AE-13 belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, low-noise power conversion in industrial, computing, and telecom power supplies.

FAQ

What is the maximum junction temperature and how is it calculated?

The B280AE-13 has an operating junction temperature range of –65°C to +150°C. TJ is calculated as TA + (Pd × RθJA), where Pd = VF × IO. At 2.0 A and 0.79 V, Pd = 1.58 W; with RθJA = 110°C/W, TJ rises 174°C above ambient-so derating is mandatory above 25°C. The datasheet provides derating curves (Fig. 4) showing usable IO drops to ~1.2 A at 100°C ambient.

Is B280AE-13 suitable for automotive applications?

B280AE-13 is not AEC-Q101 qualified and lacks automotive-specific qualification testing (e.g., HTOL, temperature cycling). While its –65°C to +150°C rating covers most under-hood environments, Diodes Incorporated does not guarantee automotive reliability or provide PPAP documentation for this part. It is approved for industrial and commercial use only.

How does the guard ring construction improve reliability?

The guard ring is a diffused p-type region surrounding the active Schottky junction, which equalizes electric field distribution at the die edge. This prevents premature avalanche breakdown during voltage transients (e.g., MOSFET turn-off spikes), extending lifetime in switching power supplies. Test data shows >2× improvement in surge survivability versus non-guard-ring Schottkys under IFSM = 50 A conditions.

Can B280AE-13 replace a 1N5822 in existing designs?

Yes-B280AE-13 matches 1N5822's 80 V VRRM and 3 A IO rating (though rated at 2.0 A average), shares SMA package and cathode-band polarity, and offers lower VF (0.79 V vs. 0.9 V typical). However, its lower IO rating requires verifying thermal margin; layout changes may be needed if original design relied on 1N5822's higher surge rating (60 A vs. 50 A).