Diodes Incorporated SK15-13

Overview

SK15-13 from Diodes Incorporated is a surface-mount Schottky barrier rectifier with 50 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, used in low-loss DC power supplies and high-frequency switching converters.

For engineers reviewing the SK15-13 datasheet, SK15-13 pinout, SK15-13 application, or SK15-13 equivalent, key selection factors include its SMB package thermal resistance (25°C/W), 25 A non-repetitive surge rating, and 110 pF junction capacitance at 1 MHz - critical for EMI-sensitive 5–24 V SMPS designs.

Technical Context

This Schottky diode employs a metallurgically bonded junction on a silicon die to achieve low forward voltage drop and fast recovery without minority-carrier storage delay. Its construction supports operation up to +125°C junction temperature and meets MIL-STD-19500 reliability standards.

The device is rated for single-phase, half-wave, 60 Hz resistive or inductive loads with 6.0 mm copper pads per JEDEC derating curves. It exhibits 5 mA full-cycle average reverse current at 75°C and 10 mA DC reverse leakage at 100°C under rated blocking voltage.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with UL 94V-0 flammability rating, moisture sensitivity level 1, and matte tin lead-free plating option (-F suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK15-13, B150B-13-F offers higher current capacity and lower VF at cost of slightly larger footprint tolerance, while SS15-E3/5AT delivers superior low-VF performance ideal for battery-fed systems but with reduced IFSM margin for surge-prone environments.

Availability

SK15-13 is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C power delivery sinks, and industrial PLC power input stages requiring stable component supply and RoHS-compliant sourcing.

Supply support for SK15-13 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 U.S.

The SKxx series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-effective, high-reliability replacement of older PN diodes in mid-power (<25 W) offline and DC-DC power conversion.

FAQ

Is SK15-13 lead-free and RoHS compliant?

Yes, SK15-13 is RoHS compliant per EU Directive Annex Notes 5 and 7, with glass and high-temperature solder exemptions applied. The standard version uses matte tin finish, and the lead-free variant is designated SK15-13-F per ordering information on page 3 of DS13003 Rev. 8.

What is the maximum allowable junction temperature for SK15-13?

The absolute maximum junction temperature (TJ) is +125°C, as specified in the Electrical Characteristics table. Operation beyond this limit risks irreversible degradation of the Schottky junction and increased reverse leakage current.

Can SK15-13 replace SK14-13 in an existing design?

Yes, SK15-13 is a direct upgrade from SK14-13 with identical SMB package and pinout, differing only in VRRM (50 V vs. 40 V) and VF (0.70 V vs. 0.55 V). No layout changes are needed, but verify reverse voltage margin in your application exceeds 50 V.

Does SK15-13 require a heatsink in standard operation?

No external heatsink is required at ≤1.0 A and ambient temperatures ≤75°C with 6.0 mm copper pads, per Figure 1 derating curve. At higher currents or ambient temperatures, thermal vias or extended copper pours are recommended to maintain TJ ≤125°C.