Diodes Incorporated S3A-13

Overview

S3A-13 from Diodes Incorporated is a 50 V peak repetitive reverse voltage, 3.0 A average rectified output current, surface-mount glass passivated silicon rectifier in SMC package, optimized for high-current AC/DC conversion in power supplies and DC motor drives.

For engineers reviewing the S3A-13 datasheet, S3A-13 pinout, S3A-13 application, or S3A-13 equivalent, key selection criteria include its 1.15 V forward voltage at 3.0 A, 100 A non-repetitive surge rating, 10 µA reverse leakage at 25°C, thermal resistance of 10 °C/W, and RoHS-compliant matte tin plating.

Technical Context

This device operates as a single-phase, half-wave rectifier under 60 Hz resistive or inductive loads, with derating required for capacitive loads (−20% current). Its glass passivated die construction ensures stable junction integrity and low leakage across −65°C to +150°C operating range.

The SMC package provides enhanced thermal dissipation versus SMB variants, supporting 3.0 A average current at terminal temperature ≤75°C per derating curve Fig. 1, with junction-to-terminal thermal resistance measured on a 5.0 mm² copper pad per JESD51-14.

Key Specifications

Pinout & Package

SMC (DO-214AB) surface-mount package: molded plastic case, UL 94V-0 rated, cathode marked by band or notch, solderable matte tin terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5401-TP and SB350-E3/5BT, S3A-13 delivers optimal balance of SMT footprint, 1.15 V forward drop, 10 µA leakage, and 150°C operation-making it preferred for modern compact, thermally demanding, and automotive-grade rectification.

Availability

S3A-13 is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial DC motor drives, and automotive auxiliary power supplies requiring stable component supply and RoHS-compliant manufacturing.

Supply support for S3A-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 US.

The S3x series targets cost-sensitive, high-volume power conversion applications where reliability, thermal performance, and SMT manufacturability are critical-especially in consumer power supplies and industrial controls.

FAQ

What is the maximum allowable terminal temperature for continuous operation?

The S3A-13 supports 3.0 A average forward current only when terminal temperature (T_T) is maintained at or below 75°C, as defined in Fig. 1 of DS16005. Exceeding this limit requires current derating per the published curve, with zero current allowed above 150°C terminal temperature.

Is S3A-13 suitable for capacitive-input filter applications?

No-capacitive loads require 20% derating of I_O per datasheet Note. For a 3.0 A rated device, this reduces usable current to 2.4 A in such configurations due to increased peak current stress and reduced conduction angle.

Does S3A-13 have a lead-free finish?

Yes, S3A-13 is supplied with matte tin plating compliant with RoHS Directive 2011/65/EU, including exemptions for glass and high-temperature solder per Annex III Notes 5 and 7 of EU Directive 2002/95/EC.

How is polarity identified on the SMC package?

Polarity is marked by a cathode band (visible ink stripe) or cathode notch (physical indentation) on the body end corresponding to the cathode terminal, consistent with industry-standard SMC orientation and PCB silkscreen conventions.