Diodes Incorporated US1B-13-F

Overview

US1B-13-F from Diodes Incorporated is a 1.0A surface-mount ultra-fast rectifier diode in SMA package, rated for 100V peak repetitive reverse voltage (V_RRM), with 50ns reverse recovery time (t_rr) and 1.3V forward voltage drop at 1.0A (V_FM). It delivers high-efficiency AC/DC conversion in compact power supplies and DC-DC front-end stages.

For engineers reviewing the US1B-13-F datasheet, US1B-13-F pinout, US1B-13-F application, or US1B-13-F equivalent, key selection criteria include its 30A non-repetitive surge rating, 30°C/W junction-to-terminal thermal resistance, RoHS-compliant lead-free plating, and suitability for automated SMT assembly in industrial and consumer power converters.

Technical Context

This ultra-fast rectifier uses glass-passivated die construction to achieve stable switching performance under transient load conditions. Its 50ns reverse recovery time enables operation in high-frequency switch-mode topologies up to several hundred kHz without excessive switching loss.

The device supports 1.0A average rectified output current at terminal temperature of +75°C and derates linearly to zero at +150°C. Reverse leakage remains ≤5.0µA at 25°C and ≤100µA at 100°C under full-rated blocking voltage.

Key Specifications

Pinout & Package

SMA (DO-214AC) surface-mount package with molded plastic body (UL 94V-0), cathode band polarity marking, and matte tin-plated terminals solderable per MIL-STD-202, Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06U and MBR1100, US1B-13-F offers optimal balance of ultra-fast recovery (50ns), moderate forward drop (1.3V), and robust 30A surge tolerance-making it preferred for cost-sensitive, thermally constrained 1A AC-DC and DC-DC applications where Schottky leakage or higher-cost alternatives are unacceptable.

Availability

US1B-13-F is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converter input stages, and LED driver power supplies requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for US1B-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The US1x series belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in space-constrained consumer, industrial, and computing applications.

FAQ

What is the maximum junction temperature for US1B-13-F?

The absolute maximum junction temperature is +150°C, with continuous operation limited by thermal derating: average rectified current drops linearly from 1.0A at +75°C terminal temperature to zero at +150°C, as shown in Figure 1 of DS16008.

Is US1B-13-F compatible with lead-free reflow processes?

Yes-US1B-13-F features matte tin-plated terminals and meets JEDEC J-STD-020 moisture sensitivity Level 1, allowing standard Pb-free reflow profiles (peak 260°C) without preconditioning or special handling.

How does US1B-13-F differ from US1A-13-F?

US1B-13-F has a 100V V_RRM rating versus 50V for US1A-13-F; both share identical package, thermal specs, and 50ns t_rr, but US1B's higher blocking voltage allows use in 100–120VAC-input designs where US1A would avalanche.

Can US1B-13-F replace a standard FR107 diode?

Yes-US1B-13-F matches FR107's 1000V rating only in V_RRM class naming; actual US1B V_RRM is 100V. For true FR107 replacement (1000V), US1M-13-F is the correct variant in this family.