Diodes Incorporated S3B-13

Overview

S3B-13 from Diodes Incorporated is a 3.0A, 100V peak repetitive reverse voltage (V_RRM) surface-mount glass passivated silicon rectifier diode in SMB package, with 1.15V forward voltage at 3.0A, 100A non-repetitive surge capability, and −65°C to +150°C operating temperature range-used in AC/DC input stage rectification for industrial power supplies.

For engineers reviewing the S3B-13 datasheet, S3B-13 pinout, S3B-13 application, or S3B-13 equivalent, key selection criteria include V_RRM rating, thermal resistance (10°C/W), forward voltage drop, surge robustness (100A @ 8.3ms), and RoHS-compliant lead-free plating suitability for automated SMT assembly.

Technical Context

This device is a single-phase, half-wave silicon rectifier optimized for resistive or inductive loads at 60Hz line frequency. Its glass passivated die construction ensures stable reverse leakage (<10µA @ 25°C, <250µA @ 125°C) and high reliability under thermal cycling.

The SMB package provides low thermal resistance (10°C/W junction-to-terminal) when mounted on a 5.0 mm² copper pad, enabling sustained 3.0A average output current at terminal temperature ≤75°C per derating curve.

Key Specifications

Pinout & Package

SMB (DO-214AA) surface-mount package: molded plastic case, UL 94V-0 rated, cathode indicated by band marking, solderable matte tin terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB3100-E3/52, S3B-13 trades 0.3V higher V_F for broader global availability and lower unit cost; versus ES3B, it saves 30% board area at the expense of 2°C/W higher thermal resistance-making it optimal for cost-sensitive, space-constrained industrial SMT designs.

Availability

S3B-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver primary-side rectification, automotive body control modules, and appliance motor drive input stages requiring stable component supply and RoHS-compliant manufacturing.

Supply support for S3B-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 automotive markets.

The S3x-B series belongs to Diodes' general-purpose rectifier product line, engineered for high-volume, cost-sensitive power conversion applications where reliability, thermal performance, and automated assembly compatibility are essential.

FAQ

What is the maximum allowable PCB pad size for thermal performance validation?

The datasheet specifies thermal resistance (R_JT = 10°C/W) is measured with a 5.0 mm² copper pad, 0.013 mm thick. Using ≥5.0 mm² pad maintains rated 3.0A current; reducing pad area increases junction temperature proportionally-e.g., 2.5 mm² raises R_JT to ~14°C/W.

Can S3B-13 be used in full-wave bridge configurations?

Yes-S3B-13 is rated for single-phase, half-wave operation per datasheet test conditions, but its 100V V_RRM and 100A I_FSM make it suitable as one leg in discrete full-wave bridges for 100VAC systems; ensure matching diodes and balanced layout to avoid current imbalance.

Is the cathode band orientation standardized across SMB packages?

Yes-the cathode band on S3B-13 aligns with JEDEC DO-214AA standard: band is located at the end opposite the anode, visible on top surface, and corresponds to Pin 1 in IPC-7351 land pattern. Orientation is confirmed in Diodes' package drawing DS16005 Rev. 10.

Does the "-13" suffix indicate tape-and-reel packaging?

Yes-the "-13" suffix denotes 3,000-piece tape-and-reel packaging per Diodes' ordering information (DS16005 p.2). It is compatible with standard 8mm-width SMT feeders and meets EIA-481-D carrier tape specifications for automated placement.