Diodes Incorporated B140-13-F

Overview

B140-13-F from Diodes Incorporated is a 1.0A surface-mount Schottky barrier rectifier with 40V peak repetitive reverse voltage (V_RRM), 0.5V max forward voltage at 1.0A, and 0.5mA max reverse leakage at 25°C. It uses SMA package, features guard ring die construction for transient protection, and is optimized for low-voltage, high-frequency polarity protection and freewheeling in DC/DC converters and power supplies.

For engineers reviewing the B140-13-F datasheet, B140-13-F pinout, B140-13-F application, or B140-13-F equivalent, key selection criteria include its 40V blocking rating, low 0.5V conduction loss at rated current, 30A non-repetitive surge capability, RoHS-compliant matte tin plating, and suitability for automated SMT assembly on consumer and industrial power rails.

Technical Context

This Schottky rectifier employs a planar guard ring die structure to suppress edge breakdown and improve transient robustness under inductive switching stress. Its low forward voltage drop and fast recovery (<10ns) stem from majority-carrier conduction, eliminating minority-carrier storage delay.

Thermal performance is defined by a junction-to-terminal thermal resistance of 20°C/W when mounted on 5.0mm² copper pads - enabling 1.0A average current handling up to +130°C terminal temperature. Reverse leakage remains ≤0.5mA at rated 40V and 25°C, rising to ≤10mA at 100°C.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), molded plastic body with UL 94V-0 flammability rating, lead-free matte tin plating, cathode band polarity marking, and 0.064g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS14 and MBR140, B140-13-F delivers the lowest forward voltage (0.5V) among 40V/1A SMA Schottkys while maintaining competitive leakage and superior 30A surge rating - making it optimal for thermally constrained, high-efficiency 24V power rails.

Availability

B140-13-F is available at Aetrix Electronics and suitable for DC power polarity protection, DC/DC converter freewheeling, and low-voltage motor drive clamp applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for B140-13-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

B140-13-F belongs to Diodes' general-purpose Schottky rectifier product line, engineered for commercial and industrial power conversion applications demanding low-loss, high-reliability unidirectional current control in compact SMT packages.

FAQ

What is the maximum junction temperature for B140-13-F?

The absolute maximum junction temperature is +150°C, with continuous operation limited to +130°C terminal temperature at full 1.0A average current. Derating begins above +130°C per Figure 6 in DS13002 Rev. 20-2, requiring reduced current or enhanced heatsinking above that point.

Is B140-13-F suitable for automotive applications?

B140-13-F is not AEC-Q101 qualified. While it operates across –65°C to +150°C and meets RoHS/halogen-free requirements, Diodes specifies separate AEC-Q101-qualified variants (e.g., B140Q-13-F) for automotive use - consult Diodes' automotive product definitions before deployment in vehicle systems.

How does the SMA package affect thermal performance?

The SMA package provides 20°C/W junction-to-terminal thermal resistance when mounted on 5.0mm² copper pads. This enables 1.0A continuous current at +130°C terminal temperature; reducing pad area or omitting thermal vias increases junction temperature and requires current derating per Figure 6.

Can B140-13-F replace B130-13-F or B150-13-F in existing designs?

B140-13-F is not a direct replacement: B130-13-F has lower 30V V_RRM and same 0.5V V_F, while B150-13-F has higher 50V V_RRM but 0.7V V_F. Substitution requires verifying reverse voltage margin and conduction loss impact - especially in 24V systems where B140-13-F's 40V rating offers optimal safety margin.