Diodes Incorporated S1A-13

Overview

S1A-13 from Diodes Incorporated is a 1.0A, 50V peak repetitive reverse voltage glass passivated surface-mount rectifier diode in SMA package, featuring 1.1V forward voltage at 1.0A, 30A non-repetitive surge rating, and 5.0µA reverse leakage at 25°C - used in AC/DC input stage rectification for low-power offline adapters and auxiliary power supplies.

For engineers reviewing the S1A-13 datasheet, S1A-13 pinout, S1A-13 application, or S1A-13 equivalent, key selection criteria include VRRM=50V, IO=1.0A@TT=100°C, VF=1.1V@IF=1.0A, trr=2.0µs, and RoHS-compliant lead-free plating per Rev. 13 specification.

Technical Context

This single-phase, half-wave silicon rectifier operates with glass passivated junction for enhanced reliability under thermal cycling and humidity stress. Its 30°C/W junction-to-terminal thermal resistance enables direct PCB copper pad heatsinking without additional thermal vias in space-constrained designs.

The device supports automated SMT assembly with UL 94V-0 molded plastic case and meets J-STD-020C Level 1 moisture sensitivity. Polarity is marked by cathode band; marking code "S1A" identifies SMA package variant per Diodes Inc. ordering convention.

Key Specifications

Pinout & Package

Package: SMA (Surface-Mount Axial), molded plastic case per JEDEC DO-214AC, UL 94V-0 rated, cathode identified by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4001-T and MBR140LSFT1G, S1A-13 delivers optimal balance of SMT compatibility, 50V robustness, and 1.1V/1.0A conduction performance for cost-sensitive, thermally constrained 50/60Hz rectification.

Availability

S1A-13 is available at Aetrix Electronics and suitable for AC-DC adapters, USB wall chargers, and industrial sensor power supplies requiring stable component supply and RoHS-compliant manufacturing.

Supply support for S1A-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 Europe.

S1A-13 belongs to the S1x/B series of general-purpose surface-mount rectifiers engineered for high-volume, cost-optimized AC/DC conversion in consumer and industrial power supplies.

FAQ

What is the maximum allowable junction temperature for S1A-13?

The absolute maximum junction temperature is +150°C, but continuous operation above +125°C requires derating IO below 1.0A per the forward current derating curve in Figure 1. At TT=100°C, IO remains rated at 1.0A with adequate PCB copper heatsinking.

Is S1A-13 suitable for capacitive-input filter applications?

No - the datasheet explicitly states that for capacitive loads, average current must be derated by 20%. This reflects increased RMS current and peak inverse voltage stress; use only with resistive or inductive loads unless external limiting is applied.

Does S1A-13 have a specified reverse recovery charge (Qrr)?

No - Qrr is not characterized or guaranteed in the DS16003 datasheet. Only trr=2.0µs is specified under defined test conditions (IF=0.5A, IR=1.0A, IRR=0.25A); Qrr must be measured or estimated from waveform analysis if critical for EMI design.

Can S1A-13 replace S1A-10 or S1A-11 in existing designs?

Yes - the "-13" suffix denotes RoHS-compliant lead-free plating per EU Directive Annex 5 & 7, with identical electrical and thermal specifications to earlier revisions. No layout or thermal redesign is required for drop-in replacement.