Diodes Incorporated US1D-13-F

Overview

US1D-13-F from Diodes Incorporated is a 1.0A surface-mount ultra-fast rectifier diode with 200V peak repetitive reverse voltage (V_RRM), 50ns reverse recovery time (t_rr), and 1.7V forward voltage drop at 1.0A (V_FM). It is used in high-frequency switching power supplies, AC/DC adapters, and DC/DC converter output rectification where fast recovery and low conduction loss are critical.

For engineers reviewing the US1D-13-F datasheet, US1D-13-F pinout, US1D-13-F application, or US1D-13-F equivalent, key selection criteria include its SMA package compatibility, 30A non-repetitive surge rating, thermal resistance of 30°C/W, RoHS-compliant matte tin plating, and cathode-band polarity marking for automated assembly verification.

Technical Context

This ultra-fast rectifier employs glass passivated die construction to ensure stable junction performance under transient stress and elevated temperature operation up to +150°C. Its 50ns reverse recovery time enables efficient operation in 100kHz–500kHz SMPS topologies without excessive switching loss or EMI generation.

The device supports 1.0A average rectified current at terminal temperature (T_T) of +75°C and exhibits only 5.0µA peak reverse current at 25°C - critical for maintaining low standby power in energy-efficient designs.

Key Specifications

Pinout & Package

SMA (DO-214AC) surface-mount package: molded plastic case rated UL 94V-0, 0.064g weight, cathode band polarity marking, matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Key Features

Applications

Availability

US1D-13-F is available at Aetrix Electronics and suitable for AC/DC adapters, industrial power supplies, and LED driver designs requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.

Supply support for US1D-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, application-optimized components for power management, signal integrity, and protection.

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

Equivalent & Alternatives

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

Compared with STTH1L06S and MBR120LSFT1G, US1D-13-F uniquely balances 200V blocking, 50ns speed, and 1.7V conduction loss - making it the optimal choice for mid-voltage, high-frequency rectification where both voltage headroom and switching efficiency matter.

FAQ

What is the maximum average rectified current for US1D-13-F at +75°C terminal temperature?

The US1D-13-F is rated for 1.0A average rectified output current (I_O) at a terminal temperature (T_T) of +75°C, as specified in the DS16008 datasheet. Derating is required above this temperature - e.g., ~0.7A at +100°C - per the forward current derating curve (Figure 1). PCB copper area and airflow directly impact achievable current in real-world layouts.

Does US1D-13-F have a defined cathode marking, and how is polarity verified on the SMA package?

Yes, US1D-13-F uses a visible cathode band on the body of the SMA package to indicate the cathode terminal. This band aligns with the cathode end of the internal die and matches the standardized DO-214AC polarity convention. Visual inspection or continuity testing with a multimeter (diode test mode) confirms polarity: forward bias conducts only when red probe contacts anode and black probe contacts cathode band.

Is US1D-13-F suitable for use in automotive applications per AEC-Q101?

No, US1D-13-F is not AEC-Q101 qualified. It is rated for industrial temperature range (–65°C to +150°C) and RoHS compliance, but Diodes Incorporated does not list it in their AEC-Q101 qualified portfolio. For automotive-grade ultra-fast rectifiers, consider the AEC-Q101-certified US1DQ-13-F variant, which shares identical electrical specs but undergoes additional stress testing and lot traceability.

Can US1D-13-F replace US1B-13-F in an existing design without layout changes?

Yes - US1D-13-F is footprint-compatible with US1B-13-F (both SMA package), and both share identical pinout, thermal characteristics, and mechanical dimensions. However, US1D has higher V_RRM (200V vs. 100V) and slightly higher V_FM (1.7V vs. 1.3V). Substitution is safe if the circuit's reverse voltage stress stays ≤200V and the 0.4V higher forward drop is acceptable for thermal budget.