Diodes Incorporated SK14-13

Overview

SK14-13 from Diodes Incorporated is a surface-mount Schottky barrier rectifier rated for 40 V maximum recurrent peak reverse voltage, 1.0 A average forward rectified current at 75°C, and 0.70 V maximum forward voltage at 1.0 A. It features low thermal resistance (25 °C/W), 110 pF typical junction capacitance, and operates from –65 °C to +125 °C - used in DC/DC converter output stages and low-voltage AC-DC adapters.

For engineers reviewing the SK14-13 datasheet, SK14-13 pinout, SK14-13 application, or SK14-13 equivalent, key selection criteria include its 40 V blocking capability, SMB package thermal performance, Schottky low VF advantage over PN diodes, and compatibility with lead-free reflow profiles per J-STD-020C Level 1.

Technical Context

This device implements a planar Schottky junction structure with high-temperature metallurgically bonded contacts, enabling fast switching (no minority-carrier storage) and low forward conduction loss. Its 0.70 V VF at 1.0 A and 25 °C/W junction-to-lead thermal resistance support efficient power conversion in compact layouts.

The SMB package provides mechanical robustness for surface-mount assembly, with 6.0 mm copper pads specified for thermal derating curves. Reverse leakage remains ≤5 mA at full load and 75 °C, and capacitance is characterized at 1.0 MHz and 4.0 V reverse bias.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case per JEDEC DO-214AA, UL 94V-0 rated, moisture sensitivity level 1. Dimensions: 3.30–3.94 mm (A), 4.00–4.65 mm (B), 1.95–2.21 mm (C), 0.15–0.40 mm (D), 5.00–6.00 mm (E), 0.10–0.20 mm (G), 0.76–1.52 mm (H), 2.00–2.62 mm (J). Weight: 0.093 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK14-13, B140B-13-F delivers lower VF for reduced conduction loss in high-duty-cycle applications, while SS14-E3/5AT trades thermal robustness for smaller size - making SK14-13 optimal where SMB's proven thermal path and reliability in industrial environments are required.

Availability

SK14-13 is available at Aetrix Electronics and suitable for AC-DC adapters, USB-C power delivery modules, and industrial sensor power supplies requiring stable component supply and long-term manufacturability.

Supply support for SK14-13 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 and manufacturing operations across Asia and the Americas.

The SK12–SK16 series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-sensitive, high-volume power conversion applications demanding reliable low-VF performance in standard surface-mount packages.

FAQ

Is SK14-13 suitable for synchronous rectification in a 500 kHz flyback converter?

Yes - its zero reverse recovery charge (Qrr ≈ 0) and 110 pF junction capacitance enable clean switching at 500 kHz without tail current or ringing. However, ensure gate drive timing accounts for forward voltage variation across temperature, as VF rises to ~0.85 V at 125 °C junction temperature.

What is the maximum allowable PCB copper area for thermal derating compliance?

The datasheet specifies 6.0 mm copper pads for the forward current derating curve. Using ≥6.0 mm² per pad (e.g., 2.0 × 3.0 mm) ensures adherence to the published I(AV) = 1.0 A at 75 °C rating. Smaller pads require linear derating per Figure 1.

Does SK14-13 meet AEC-Q200 for automotive use?

No - SK14-13 is not AEC-Q200 qualified. While it operates from –65 °C to +125 °C and survives 265 °C soldering, Diodes Incorporated positions the B1x0B series (e.g., B140B-13-F) for automotive applications with full qualification and enhanced robustness testing.

Can SK14-13 be paralleled for higher current handling?

Not recommended without external balancing - VF mismatch between units causes current hogging. The datasheet does not specify VF distribution or thermal coupling behavior for parallel operation. For >1.0 A, select a higher-current Schottky (e.g., SK24-13) or use active synchronous rectification.