Diodes Incorporated SK13-13

Overview

SK13-13 from Diodes Incorporated is a surface-mount Schottky barrier rectifier rated for 30 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 SK13-13 datasheet, SK13-13 pinout, SK13-13 application, or SK13-13 equivalent, key selection criteria include its SMB package thermal resistance (25°C/W), 25 A non-repetitive surge rating, 110 pF junction capacitance at 1 MHz, and suitability for compact 60 Hz rectification with minimal conduction loss.

Technical Context

This Schottky diode employs a high-temperature metallurgically bonded junction to achieve low forward voltage drop and fast switching response, enabling efficient operation in high-frequency SMPS and AC/DC adapters without reverse recovery delay.

Its SMB package provides mechanical robustness for reflow soldering up to 265°C for 10 seconds, with UL 94V-0 flammability rating and moisture sensitivity level 1 compliance-critical for automated assembly in industrial and consumer power modules.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Small Outline), molded plastic case, UL 94V-0 rated, cathode indicated by band or notch, polarity-sensitive mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK13-13, B130B-13-F delivers lower conduction loss at room temperature but exhibits greater reverse leakage above 85°C, while SS13-E3/5AT trades compactness for improved thermal margin and legacy assembly compatibility.

Availability

SK13-13 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 RoHS-compliant sourcing.

Supply support for SK13-13 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, specializing in high-efficiency power management and signal integrity solutions.

The SK12–SK16 series targets cost-sensitive, high-volume power conversion applications where low forward voltage and fast switching are essential-particularly in consumer adapters and industrial auxiliary supplies.

FAQ

Is SK13-13 suitable for synchronous rectification circuits?

No-SK13-13 is a passive Schottky diode, not a controlled switch. It lacks gate drive capability and cannot replace MOSFETs in actively synchronized topologies. Its role is limited to self-commutated rectification where timing is determined solely by voltage polarity.

What is the maximum allowable PCB copper pad size for SK13-13 thermal performance?

The datasheet specifies 6.0 mm copper pads for derating curves. Using pads larger than 6.0 mm does not improve thermal resistance beyond the specified RθJL = 25°C/W, as heat transfer is limited by junction-to-lead conduction-not pad-to-ambient convection.

Does SK13-13 have a qualified automotive grade variant?

No-SK13-13 is not AEC-Q101 qualified. Diodes Incorporated offers the B130BQ-13-F (automotive-grade Schottky) as a direct functional replacement with identical electrical specs and AEC-Q101 certification for under-hood applications.

Can SK13-13 be substituted with SK12-13 in a 20 V design?

Yes-SK12-13 has identical package, thermal, and surge ratings, differing only in VRRM (20 V vs. 30 V). In a 20 V design with ≤10% ripple and no transients exceeding 22 V, SK12-13 is electrically sufficient and may reduce cost.