Diodes Incorporated SK14-13-F

Overview

SK14-13-F from Diodes Incorporated is a surface-mount Schottky barrier rectifier with 40 V maximum recurrent peak reverse voltage (V_RRM), 1.0 A average forward rectified current at T_A = 75°C, and 0.70 V maximum instantaneous forward voltage at 1.0 A. It uses an SMB package with metallurgically bonded contacts and is rated for operation from –65°C to +125°C junction temperature, commonly used in low-loss DC power supplies and AC/DC adapters.

For engineers reviewing the SK14-13-F datasheet, SK14-13-F pinout, SK14-13-F application, or SK14-13-F equivalent, key selection criteria include its 40 V blocking capability, low 0.70 V forward drop at 1.0 A, 25 °C/W junction-to-lead thermal resistance, 110 pF typical capacitance at 1 MHz, and compatibility with high-reliability surface-mount assembly including 265°C solder bath immersion.

Technical Context

This Schottky rectifier employs a planar epitaxial construction with high-temperature metallurgical bonding to achieve low forward voltage and fast switching without minority-carrier storage delay. Its 40 V V_RRM rating targets secondary-side rectification in offline SMPS and isolated DC/DC converters where moderate voltage margin and efficiency are prioritized over ultra-high blocking capability.

The device exhibits 5 mA maximum full-cycle average reverse current at T_A = 75°C and 10 mA at T_A = 100°C, indicating thermally stable leakage behavior under sustained load. Its 25 °C/W junction-to-lead thermal resistance enables direct heat conduction through the leads when mounted on 6.0 mm copper pads, supporting reliable 1.0 A continuous operation within ambient limits.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case per JEDEC DO-214AA; UL 94V-0 rated; moisture sensitivity level 1; cathode indicated by band or notch; 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-F, B140B-13-F offers lower forward voltage but slightly higher reverse leakage, while SS14-E3/5AT matches electrical ratings but demands more careful thermal layout due to higher junction-to-ambient resistance-both are viable where V_F optimization or multi-source procurement is prioritized.

Availability

SK14-13-F is available at Aetrix Electronics and suitable for AC/DC adapter rectification, USB Power Delivery output stages, and industrial sensor power supplies requiring stable component supply and long-term manufacturability.

Supply support for SK14-13-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, specializing in high-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The SK12–SK16 series was designed for cost-effective, high-reliability surface-mount rectification in mainstream power conversion applications, emphasizing thermal robustness and process compatibility over ultra-low V_F or ultra-high V_RRM.

FAQ

Is SK14-13-F suitable for synchronous rectification circuits?

No. SK14-13-F is a passive Schottky rectifier and lacks gate control or drive interface required for synchronous rectification. It functions only as a unidirectional current valve and cannot replace MOSFET-based synchronous rectifiers that rely on external timing signals or integrated controllers.

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

The datasheet specifies 6.0 mm copper pads for the forward current derating curve. Larger pads improve heat spreading but do not reduce R_θJL (junction-to-lead); thermal performance beyond 1.0 A at 75°C ambient requires additional thermal vias or external heatsinking, as R_θJL remains fixed at 25 °C/W.

Does SK14-13-F meet automotive AEC-Q101 qualification?

No. SK14-13-F is not AEC-Q101 qualified. It is rated for industrial temperature range (–65°C to +125°C) and meets MIL-STD-19500 environmental stress standards, but lacks the specific qualification testing (e.g., HTOL, temperature cycling, ESD) required for automotive under-hood or safety-critical applications.

Can SK14-13-F be used in place of SK14-13 without modification?

Yes, SK14-13-F is the RoHS-compliant, lead-free version of SK14-13 with identical electrical, thermal, and mechanical specifications. The "-F" suffix denotes matte tin finish; no layout or schematic changes are needed, and it is fully compatible with both leaded and lead-free assembly processes.