Diodes Incorporated S1B-13

Overview

S1B-13 from Diodes Incorporated is a 1.0A surface-mount glass passivated silicon rectifier diode in SMA package, rated for 100V peak repetitive reverse voltage (VRRM), 1.1V forward voltage at 1.0A (VFM), and 30A non-repetitive surge current (IFSM). It serves as a primary AC/DC input rectifier in low-power offline power supplies, adapter circuits, and DC bias networks where compact size and thermal reliability are critical.

For engineers reviewing the S1B-13 datasheet, S1B-13 pinout, S1B-13 application, or S1B-13 equivalent, key selection criteria include its 100V blocking rating, 1.0A average output current at 100°C terminal temperature, 2.0µs reverse recovery time, RoHS-compliant lead-free finish, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

This single-phase, half-wave rectifier operates under 60Hz resistive or inductive loads without derating; for capacitive loads, current must be reduced by 20%. Its glass passivated die construction ensures stable junction behavior across -65°C to +150°C operating range.

Thermal performance is defined by 30°C/W junction-to-terminal resistance when mounted on 5.0 mm² copper pads, and reverse leakage remains ≤5.0 µA at 25°C and ≤100 µA at 125°C under rated DC blocking voltage.

Key Specifications

Pinout & Package

Package: SMA (Surface Mount Axial), molded plastic case with UL 94V-0 flammability rating, cathode marked by band, weight ≈ 0.064 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M100S1 and VS-1N4001HM3/54, S1B-13 delivers balanced performance: lower trr than Vishay's part improves EMI in compact designs, while its 1.1V VFM remains within 5% of ON Semi's optimized variant-making it ideal for general-purpose, thermally constrained SMT rectification where qualification effort must be minimized.

Availability

S1B-13 is available at Aetrix Electronics and suitable for AC-DC adapters, industrial sensor power supplies, USB-C auxiliary rails, and LED driver bias circuits requiring stable component supply across multi-year production cycles.

Supply support for S1B-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 S1x-B series belongs to Diodes' standard rectifier portfolio, engineered for cost-effective, high-yield SMT deployment in consumer, industrial, and computing power conversion systems where reliability and RoHS compliance are mandatory.

FAQ

What is the maximum allowable PCB copper pad area for optimal thermal performance of S1B-13?

The datasheet specifies thermal resistance RθJT = 30°C/W when mounted on 5.0 mm² of 0.013 mm thick copper pad. Increasing pad area beyond this yields diminishing returns; adding thermal vias to inner layers is more effective than oversized surface pads. Do not reduce pad area below 4.5 mm² to avoid exceeding 150°C junction temperature at full 1.0A load.

Can S1B-13 replace S1A-13 in an existing design without modification?

Yes-S1B-13 and S1A-13 share identical SMA package, pinout, and thermal characteristics, differing only in VRRM (100V vs. 50V) and corresponding IR leakage. If the circuit operates below 50V reverse stress, S1B-13 offers headroom; no layout or thermal changes are needed, but verify reverse voltage margins in worst-case transients.

Is S1B-13 suitable for use in a capacitive-input filter configuration?

No-per the datasheet, current must be derated by 20% for capacitive loads due to elevated peak currents. At 1.0A rated IO, this limits continuous operation to 0.8A. For such topologies, consider fast-recovery alternatives like ES1B or select higher-current variants (e.g., S2B-13) to maintain margin.

Does the "-13" suffix indicate RoHS compliance or a revision level?

The "-13" suffix denotes the revision level of the device's manufacturing process and test flow, aligned with Diodes Incorporated's internal DS16003 document revision 13. RoHS compliance is inherent in all "-13" parts per Note 3, which cites EU Directive Annex exemptions applied since 2003-no separate "-F" suffix is required unless explicitly ordered for matte tin plating.