Diodes Incorporated B340-13-F

Overview

B340-13-F from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.50 V max forward voltage at 3.0 A and 0.1 mA max reverse leakage at rated VR, optimized for low-voltage, high-frequency polarity protection and freewheeling in DC/DC converters.

For engineers reviewing the B340-13-F datasheet, B340-13-F pinout, B340-13-F application, or B340-13-F equivalent, key selection criteria include peak repetitive reverse voltage (40 V), average rectified current (3.0 A), thermal resistance (20 °C/W junction-to-terminal), surge rating (100 A), and RoHS-compliant lead-free plating.

Technical Context

This Schottky diode employs guard ring die construction to enhance transient immunity and withstand non-repetitive forward surge currents up to 100 A (8.3 ms half-sine). Its low VF enables high-efficiency operation in low-voltage power rails.

Designed for surface-mount assembly on standard PCBs, it operates across –55 °C to +150 °C with junction-to-terminal thermal resistance of 20 °C/W and junction-to-ambient of 90 °C/W under defined pad conditions.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), molded plastic with matte tin-plated terminals, cathode band polarity marking, 0.21 g weight, UL 94V-0 rated compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS34 and MBR340, B340-13-F delivers lower VF, superior thermal resistance (20 °C/W vs. ≥75 °C/W), and automotive-grade qualification-making it optimal for thermally constrained, high-reliability 12–24 V systems.

Availability

B340-13-F is available at Aetrix Electronics and suitable for DC/DC converter freewheeling, polarity protection circuits, and automotive body control modules requiring stable component supply and long-term manufacturing continuity.

Supply support for B340-13-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.

The B320–B360 series targets cost-sensitive, high-volume commercial and automotive-qualified power rectification, emphasizing low VF, surge resilience, and green packaging for compact power supplies and protection circuits.

FAQ

What is the maximum junction temperature for B340-13-F?

The absolute maximum junction temperature is +150 °C, with continuous operation supported from –55 °C to +150 °C. Derating begins above +25 °C ambient per the forward current derating curve (Fig. 6), where IO drops linearly to zero at +125 °C terminal temperature.

Is B340-13-F suitable for automotive applications?

Yes-B340-13-F meets JEDEC reliability standards referenced in AEC-Q, and its automotive-qualified counterpart (B340Q) is documented separately. It supports under-hood environments with full –55 °C to +150 °C operation, 100 A surge rating, and halogen-free "Green" construction.

How does the SMC package compare to SMA in thermal performance?

SMC offers significantly lower thermal resistance: RθJT = 20 °C/W vs. ~35–45 °C/W for SMA. Its larger copper pad area (6.90 × 4.40 mm suggested layout) improves heat spreading, enabling 3 A operation without heatsinking where SMA would require derating to ≤2 A.

Can B340-13-F replace B320-13-F in an existing design?

Yes-both share identical SMC package, pinout, and thermal characteristics. B340-13-F offers higher VRRM (40 V vs. 20 V), making it a direct upgrade where reverse voltage margin is insufficient; no layout or soldering changes are needed.