Diodes Incorporated S3GB-13-F

Overview

S3GB-13-F from Diodes Incorporated is a 400 V, 3.0 A glass passivated surface-mount rectifier diode in SMB package, featuring 1.15 V forward voltage at 3.0 A, 100 A non-repetitive surge capability, and RoHS-compliant matte tin plating. It serves as a primary AC/DC input rectifier in offline power supplies for industrial control modules, LED drivers, and auxiliary power rails.

For engineers reviewing the S3GB-13-F datasheet, S3GB-13-F pinout, S3GB-13-F application, or S3GB-13-F equivalent, key selection criteria include peak repetitive reverse voltage (400 V), average forward current (3.0 A @ T_T = +75°C), thermal resistance (10 °C/W junction-to-terminal), and SMB package compatibility with automated SMT assembly.

Technical Context

This device operates as a single-phase, half-wave silicon rectifier optimized for resistive or inductive loads at 60 Hz. Its glass passivated die construction ensures stable reverse leakage (<10 µA @ 25°C, <250 µA @ 125°C) and robust surge tolerance (100 A, 8.3 ms sine wave).

The SMB package provides defined thermal performance (R_θJT = 10 °C/W with 5.0 mm² copper pad) and mechanical reliability (UL 94V-0 molding compound), enabling direct integration into compact, convection-cooled power stages without forced airflow.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case per JEDEC DO-214AA standard, UL 94V-0 rated, cathode indicated by band on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS340SB and MBR340G, S3GB-13-F uniquely delivers 400 V blocking in an SMB SMT package with proven surge robustness-making it irreplaceable for universal-input AC/DC front ends where voltage rating, package fit, and surge immunity are jointly critical.

Availability

S3GB-13-F is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input rectification, and consumer appliance power conversion requiring stable component supply and full RoHS/Green compliance.

Supply support for S3GB-13-F 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, specializing in high-reliability power management, signal integrity, and protection solutions.

The S3x/B series belongs to Diodes' general-purpose rectifier product line, engineered for cost-sensitive, high-volume AC/DC conversion applications where ruggedness, manufacturability, and regulatory compliance are essential.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The S3GB-13-F has an operating junction temperature range of –65°C to +150°C. For continuous operation at rated 3.0 A average current, the terminal temperature must be maintained at ≤+75°C per the derating curve. Exceeding this requires thermal design adjustments-such as increasing copper pad area-to keep T_J within limits.

Is S3GB-13-F compatible with lead-free reflow soldering processes?

Yes. S3GB-13-F features matte tin lead-free plating and meets JEDEC J-STD-020 Level 1 moisture sensitivity. It is qualified for standard Pb-free reflow profiles (peak temperature up to 260°C), with no pre-bake required prior to assembly.

How does the SMB package compare thermally to SMC for the same S3x-B part number?

The SMB package (S3GB-13-F) has higher thermal resistance than SMC variants (e.g., S3G-13-F): R_θJT is 10 °C/W for SMB vs. ~6.5 °C/W for SMC. This means SMB requires more aggressive PCB copper thermal relief or lower current derating to achieve equivalent junction temperatures under identical loading.

Can S3GB-13-F be used in full-wave bridge configurations?

Yes. S3GB-13-F is rated for single-phase, half-wave operation but is commonly used in discrete full-wave bridges. Four units can form a 400 V, 3.0 A bridge; however, each diode must be individually derated per thermal and surge constraints-especially under capacitive loads, where average current should be reduced by 20%.