Diodes Incorporated B320B-13-F

Overview

B320B-13-F from Diodes Incorporated is a 20 V, 3.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.50 V forward voltage at 3.0 A, 100 A non-repetitive surge rating, and AEC-Q101 qualification for automotive-grade reliability-used in low-voltage DC/DC converter output rectification and polarity protection circuits.

For engineers reviewing the B320B-13-F datasheet, B320B-13-F pinout, B320B-13-F application, or B320B-13-F equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (RθJT = 25 °C/W), peak reverse voltage (20 V), surge capability (100 A), and SMB package compatibility with automated SMT assembly.

Technical Context

This Schottky rectifier uses guard ring die construction to enhance transient immunity and suppress leakage under high dv/dt conditions. Its low VF enables high-efficiency operation in 3.3 V and 5 V power rails where conduction loss minimization is critical.

Designed for high-frequency switching applications, it exhibits 200 pF junction capacitance at 4 V reverse bias and maintains stable reverse leakage (<0.5 mA at 20 V, 25 °C), supporting fast recovery in flyback and synchronous rectifier topologies without external snubbers.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount plastic case with cathode band marking; dimensions: 4.3 mm × 2.5 mm × 2.3 mm (L × W × H); weight ≈ 0.093 g.

Key Features

Applications

Availability

B320B-13-F is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC I/O modules, and consumer USB-C PD adapter secondary-side rectification requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for B320B-13-F 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 automotive, industrial, and computing markets.

The B320B series belongs to Diodes' standard Schottky rectifier product line, engineered for cost-sensitive, high-volume applications demanding low VF, robust surge handling, and full RoHS/Green compliance without performance trade-offs.

FAQ

What is the maximum junction temperature for continuous operation?

The B320B-13-F has a specified operating junction temperature range of –55°C to +150°C. Continuous operation at rated 3.0 A average forward current requires terminal temperature (TT) ≤ +100°C per derating curve Figure 6; exceeding this necessitates thermal design mitigation such as increased copper area or forced airflow.

Is B320B-13-F pin-compatible with other SMB Schottky rectifiers?

Yes-B320B-13-F uses the standard SMB (DO-214AA) package with anode/cathode terminals in fixed orientation per JEDEC outline. It shares mechanical footprint and solder pad layout with industry-standard SMB Schottkys like SB320 or SS32, but electrical parameters (VF, IR, VRRM) must be verified for functional interchangeability.

Does this part require derating when used with capacitive loads?

Yes-the datasheet explicitly states that for capacitive loads, the average forward current must be derated by 20%. At 3.0 A rated current, this means limiting continuous conduction to 2.4 A to prevent excessive peak charging currents and localized heating at turn-on.

How does the guard ring construction improve reliability?

The guard ring die structure reduces electric field crowding at the PN junction periphery, suppressing avalanche breakdown initiation and lowering leakage current drift under thermal cycling. This extends operational life in automotive applications subject to repeated thermal stress and voltage transients.