Diodes Incorporated S1K-13

Overview

S1K-13 from Diodes Incorporated is a 1.0A, 800V peak repetitive reverse voltage (V_RRM) surface-mount glass passivated silicon rectifier diode in SMA package, with forward voltage drop of 1.1V at 1.0A, 30A non-repetitive surge rating, and reverse recovery time of 2.0µs - used in AC/DC input stage rectification for industrial power supplies.

For engineers reviewing the S1K-13 datasheet, S1K-13 pinout, S1K-13 application, or S1K-13 equivalent, key selection criteria include V_RRM derating for capacitive loads, thermal resistance (30°C/W) under PCB copper pad heatsinking, and RoHS-compliant lead-free plating per EU Directive Annex Notes 5 & 7.

Technical Context

This single-phase, half-wave rectifier operates at 60Hz with resistive or inductive loads; for capacitive loads, average output current must be derated by 20%. It uses glass passivated die construction to ensure stable reverse leakage performance up to 125°C (100µA max).

The device exhibits low thermal resistance (30°C/W junction-to-terminal) when mounted on 5.0 mm² × 0.013 mm thick copper pads, enabling reliable 1.0A continuous conduction at T_T = 100°C per the forward current derating curve.

Key Specifications

Pinout & Package

SMA package: molded plastic case, UL 94V-0 rated, cathode band polarity marking, solderable matte tin terminals, 0.064g weight. Dimensions: A=2.29–2.92mm, B=4.00–4.60mm, C=1.27–1.63mm, E=4.80–5.59mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S1K-13, MUR108 offers faster switching but demands thermal management and increases conduction loss, while VS-1N4007-M3/54 sacrifices speed and modern compliance for lowest unit cost in non-SMT contexts.

Availability

S1K-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input rectification, and embedded system auxiliary power requiring stable component supply, RoHS compliance, and automated SMT placement support.

Supply support for S1K-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 S1x series targets cost-sensitive, high-volume surface-mount rectification applications where reliability, thermal performance, and RoHS compliance are mandatory in industrial and consumer power stages.

FAQ

What is the maximum allowable operating temperature for S1K-13?

The S1K-13 has an operating junction temperature range of −65°C to +150°C. Its average rectified output current is rated at 1.0A only when terminal temperature (T_T) is maintained at 100°C, per the derating curve in Figure 1. Exceeding this terminal temperature reduces safe current handling linearly to zero at 150°C.

Is S1K-13 compatible with lead-free reflow soldering processes?

Yes - S1K-13 features matte tin lead-free plating compliant with RoHS Directive Annex Notes 5 and 7 (glass and high-temperature solder exemptions). It is qualified for standard Pb-free reflow profiles, including peak temperatures up to 260°C, and meets J-STD-020C moisture sensitivity Level 1.

How does capacitive load affect S1K-13 current rating?

For capacitive loads, the datasheet mandates a 20% reduction in average rectified output current (I_O). Thus, the 1.0A rating becomes 0.8A maximum under capacitive-input conditions - due to increased peak current stress during capacitor charging transients, which elevates junction temperature beyond steady-state assumptions.

What is the cathode identification method on S1K-13?

The cathode is marked by a distinct band (notch) on the SMA package body, aligned with the cathode terminal. Per mechanical drawings, the cathode terminal corresponds to the lead positioned at the "E" dimension side (5.00–5.59mm length), opposite the anode. Polarity is confirmed in the "Marking Information" section of DS16003 Rev. 13-2.