Diodes Incorporated S2G-13

Overview

S2G-13 from Diodes Incorporated is a glass passivated surface-mount silicon rectifier diode rated for 400 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 a primary AC/DC conversion element in offline power supplies and DC link circuits.

For engineers reviewing the S2G-13 datasheet, S2G-13 pinout, S2G-13 application, or S2G-13 equivalent, key selection criteria include its 1.15 V forward voltage at 1.5 A, 20 pF junction capacitance, 20 °C/W thermal resistance (junction-to-terminal), RoHS-compliant lead-free finish, and SMA package compatibility with automated reflow assembly.

Technical Context

This device operates as a single-phase, half-wave rectifier under 60 Hz AC input with resistive or inductive loads; capacitive loads require 20% current derating. Its glass passivated die construction ensures stable reverse leakage (<5 µA at 25°C, <125 µA at 125°C) and robust surge immunity up to 50 A (8.3 ms half-sine).

The SMA package provides defined thermal pathing via 5.0 mm² copper pads (RJT = 20 °C/W), enabling reliable operation from –65°C to +150°C. Polarity is marked by cathode band; marking code "S2G" appears on the case per JEDEC-compliant labeling.

Key Specifications

Pinout & Package

Package: SMA (Surface Mount Adapter), molded plastic case, UL 94V-0 rated, moisture sensitivity level 1. Cathode identified by band marking; anode and cathode are the only two terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120 and 1N4007, the S2G-13 delivers optimal balance of SMT compatibility, thermal performance (20 °C/W), and 400 V/1.5 A rating for modern compact AC-DC converters-neither ultrafast nor legacy-standard, but purpose-fit for mainstream industrial and consumer power stages.

Availability

S2G-13 is available at Aetrix Electronics and suitable for AC-DC adapters, industrial power supplies, LED driver circuits, and automotive aftermarket electronics requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.

Supply support for S2G-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, manufacturing, and sales operations across Asia, Europe, and North America.

The S2x/A series belongs to Diodes' general-purpose rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in space-constrained, thermally demanding applications across consumer, industrial, and automotive markets.

FAQ

What is the maximum allowable junction temperature for S2G-13?

The S2G-13 has a maximum junction temperature (Tj) of +150°C, consistent with its specified operating range of –65°C to +150°C. This limit is enforced by thermal design using the 20 °C/W junction-to-terminal resistance and measured terminal temperature-not ambient-so heatsinking must be verified via copper pad area and layout per DS16004 Figure 1.

Can S2G-13 replace S2J-13 in a 600 V design?

No. S2G-13 has a 400 V VRRM rating, while S2J-13 is rated for 600 V. Substituting S2G-13 in a 600 V circuit risks premature reverse breakdown during line transients or peak voltage excursions. The 200 V shortfall exceeds standard safety margins (typically ≥1.5× peak line voltage), making it electrically non-interchangeable.

Is S2G-13 suitable for use in a capacitive-input filter configuration?

Yes, but with mandatory 20% current derating per the datasheet. In capacitive-input rectifiers, peak current is significantly higher than average current due to short conduction angles. For S2G-13, this reduces the usable I(AV) from 1.5 A to 1.2 A to prevent overheating and ensure long-term reliability under real-world ripple and surge conditions.

Does S2G-13 have a lead-free finish, and what is the plating specification?

Yes, S2G-13 is supplied with a matte tin (Sn) lead-free finish compliant with RoHS Directive 2011/65/EU, including exemptions for glass passivation and high-temperature solder per Annex Notes 5 and 7. The finish meets J-STD-020C Level 1 moisture sensitivity and supports standard Pb-free reflow profiles up to 260°C peak temperature.