Diodes Incorporated S2A-13

Overview

S2A-13 from Diodes Incorporated is a glass passivated surface-mount silicon rectifier diode in SMB package, rated for 50 V peak repetitive reverse voltage (VRRM), 1.5 A average forward current (I(AV)) at 100°C terminal temperature, and 50 A non-repetitive surge current (IFSM); used as primary AC/DC input rectifier in low-power offline power supplies and adapter circuits.

For engineers reviewing the S2A-13 datasheet, S2A-13 pinout, S2A-13 application, or S2A-13 equivalent, key selection criteria include forward voltage drop at 1.5 A (1.15 V), thermal resistance junction-to-terminal (20 °C/W), reverse leakage at 125°C (125 µA), and compatibility with automated SMT assembly on standard PCB copper pads.

Technical Context

This device operates as a single-phase, half-wave rectifier under 60 Hz AC line conditions with resistive or inductive loads; capacitive loads require 20% current derating per datasheet guidance. Its glass passivated die construction ensures stable reverse characteristics and high reliability in reflow-soldered applications.

Thermal performance is defined with the device mounted on a 5.0 mm² × 0.013 mm thick copper pad - the specified test condition for its 20 °C/W junction-to-terminal thermal resistance (RJT) and 1.5 A I(AV) rating. Reverse recovery behavior is not characterized; it is a standard recovery rectifier, not optimized for fast switching.

Key Specifications

Pinout & Package

SMB package (DO-214AA): molded plastic case, UL 94V-0 rated, cathode indicated by band or notch; polarity-critical for series/parallel rectifier configurations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4001-T and ES1D-E3/61T, S2A-13 delivers superior SMT manufacturability, higher continuous current, and lower conduction loss at 60 Hz - making it the optimal choice for modern compact AC/DC front-end designs requiring reliability and thermal efficiency.

Availability

S2A-13 is available at Aetrix Electronics and suitable for AC/DC wall adapters, industrial sensor power supplies, LED driver auxiliary rails, and IoT gateway AC detection circuits requiring stable component supply and RoHS-compliant sourcing.

Supply support for S2A-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 manufacturing in China, Taiwan, and the U.S.

The S2A/A–S2M/A series targets cost-sensitive, high-volume power conversion applications where reliability, thermal performance, and SMT compatibility are critical - especially in consumer, industrial, and lighting power supplies.

FAQ

Is S2A-13 suitable for full-wave bridge rectification?

No - S2A-13 is a single diode. A full-wave bridge requires four such diodes (e.g., GBU4A or DB107). Using one S2A-13 in a bridge configuration would result in open-circuit or short-circuit failure due to missing complementary devices and incorrect topology.

What is the maximum PCB copper area needed to sustain 1.5 A continuously?

The 1.5 A rating assumes a 5.0 mm² (≈2.2 mm × 2.2 mm) copper pad, 0.013 mm thick, per the JEDEC test condition. Reducing pad area increases thermal resistance and requires current derating - e.g., halving pad area raises junction temperature by ~10°C at full load.

Does S2A-13 have a specified reverse recovery time (trr)?

No - the datasheet does not specify trr. It is characterized as a standard recovery rectifier intended for 50/60 Hz line-frequency applications, not high-frequency switching. For trr-critical designs (>20 kHz), fast or ultrafast rectifiers like ES1D or MUR120 should be selected instead.

Can S2A-13 replace S2AA-13 in the same PCB footprint?

No - S2A-13 uses SMB (DO-214AA) package; S2AA-13 uses SMA (DO-214AC). Their footprints differ: SMB has larger body (3.30–3.94 mm length) and wider lead spacing (4.06–4.57 mm) than SMA (2.29–2.92 mm length, 4.00–4.60 mm spacing). Mechanical interference and solder joint reliability will be compromised if substituted without layout revision.