Diodes Incorporated S2M-13

Overview

S2M-13 from Diodes Incorporated is a glass passivated surface-mount silicon rectifier diode rated for 1000 V peak repetitive reverse voltage, 1.5 A average forward current at 100°C terminal temperature, and 50 A non-repetitive surge current (8.3 ms half-sine), used as a primary AC/DC input stage rectifier in offline power supplies.

For engineers reviewing the S2M-13 datasheet, S2M-13 pinout, S2M-13 application, or S2M-13 equivalent, key selection criteria include its 1.15 V forward voltage at 1.5 A, 5 µA max reverse leakage at 25°C, 20 pF junction capacitance, 20 °C/W thermal resistance (junction-to-terminal), and SMA package compatibility with automated assembly.

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. Its glass passivated die construction ensures stable reverse characteristics across -65°C to +150°C operating range.

The diode exhibits low forward voltage drop and high surge robustness-critical for input-stage reliability in industrial SMPS and AC-DC adapters. Thermal performance is defined with a standardized 5.0 mm² copper pad on PCB, enabling predictable junction temperature estimation during layout.

Key Specifications

Pinout & Package

Package: SMA (Surface Mount Axial), molded plastic case per UL 94V-0; cathode identified by band marking; polarity-critical for correct rectifier orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06S and MUR160, S2M-13 provides higher voltage blocking (1000 V), greater average current (1.5 A), and SMT-ready SMA packaging-making it optimal for modern, high-reliability, automated AC-DC front-ends where line voltage variation and surge immunity are critical.

Availability

S2M-13 is available at Aetrix Electronics and suitable for AC-DC power adapters, industrial control power supplies, LED driver input stages, and appliance mainboard power inputs requiring stable component supply and RoHS-compliant manufacturing.

Supply support for S2M-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, serving industrial, computing, consumer, and communications markets.

The S2x/A series belongs to Diodes' general-purpose rectifier product line, engineered for cost-sensitive, high-volume AC-DC conversion applications demanding reliability, thermal robustness, and automated assembly compatibility.

FAQ

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

The datasheet specifies thermal resistance R_JT = 20 °C/W measured with a 5.0 mm² (0.013 mm thick) copper pad. Larger pads improve heat dissipation, but the 5.0 mm² value is the reference condition for all published derating curves and ratings. Layouts exceeding this area yield lower effective R_JT, but no guaranteed improvement factor is provided.

Can S2M-13 be used in full-wave bridge configurations?

Yes-S2M-13 is a single diode and can be used in discrete full-wave bridge designs. However, it is not a monolithic bridge; four units are required per bridge. Its 1000 V rating supports use in 400 VDC bus applications, but ensure matching V_F and thermal layout across all four devices to avoid current imbalance.

Is the -13 suffix indicative of tape-and-reel packaging?

Yes-the "-13" suffix denotes 5000-piece tape-and-reel packaging in SMA format. This is confirmed in the Ordering Information section of DS16004 Rev. 9-2, which states "S2xA-13" for SMA packages shipped 5000/reel. The "-13" does not indicate date code or revision.

Does S2M-13 meet JEDEC JESD22-A110 for thermal shock?

No explicit thermal shock qualification data is published in DS16004. The device is qualified per JESD22-A104 (temperature cycling) and JESD22-A106 (highly accelerated temperature-humidity stress), but JESD22-A110 testing is not referenced. For thermal shock–critical applications, consult Diodes Incorporated's reliability report QZ-2023-017 for extended test results.