Diodes Incorporated UF1005-T

Overview

UF1005-T from Diodes Incorporated is a 600 V, 1.0 A ultra-fast recovery rectifier diode in DO-41 package, featuring 50 ns reverse recovery time, 1.7 V forward voltage at 1.0 A, and 30 A non-repetitive surge capability - used in high-frequency switch-mode power supplies, AC/DC adapters, and DC-DC converter output stages.

For engineers reviewing the UF1005-T datasheet, UF1005-T pinout, UF1005-T application, or UF1005-T equivalent, key selection criteria include reverse recovery time under 75 ns, VRRM ≥ 600 V, IF(AV) = 1.0 A at 55°C, thermal resistance ≤ 95 K/W, and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

This diffused-junction silicon rectifier uses ultra-fast switching architecture to minimize switching losses in high-frequency (>20 kHz) power conversion topologies. Its 50 ns trr and low 20 pF junction capacitance enable efficient operation in flyback and forward converters where rapid turn-off reduces cross-conduction and EMI.

The device is rated for 600 V peak repetitive reverse voltage (VRRM) and supports single-phase half-wave rectification with derating for capacitive loads. Thermal design relies on its 95 K/W junction-to-ambient resistance and 0.35 g mass, requiring lead length control per Note 1 for full 1.0 A current rating.

Key Specifications

Pinout & Package

DO-41 axial-leaded plastic package with cathode band marking; leads are tin-plated, solderable per MIL-STD-202 Method 208. Mounting position unrestricted.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UF1005-T, STTH1R06 offers superior thermal handling but requires PCB redesign, while ES1J delivers faster recovery with identical package and forward characteristics - making it a direct layout-compatible upgrade for noise-critical applications.

Availability

UF1005-T is available at Aetrix Electronics and suitable for AC/DC adapters, offline flyback converters, and LED driver secondary rectification requiring stable component supply and consistent DO-41 mechanical fit.

Supply support for UF1005-T 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 UF100x series targets cost-sensitive, high-volume power conversion applications demanding reliable ultra-fast rectification in standard through-hole packages.

FAQ

What is the maximum operating temperature for UF1005-T?

The UF1005-T has a specified junction and storage temperature range of –65°C to +150°C. Its 1.0 A average current rating assumes ambient temperature ≤55°C with 9.5 mm lead length; derating curves show usable current drops to ~0.75 A at 75°C ambient.

Can UF1005-T replace UF1004 in a 400 V design?

Yes - UF1005-T (600 V VRRM) exceeds the 400 V rating of UF1004 and shares identical package, pinout, and thermal characteristics. Its slightly higher VFM (1.7 V vs. 1.3 V) increases conduction loss by ~0.4 W at 1.0 A, which must be verified in thermal design.

Is UF1005-T RoHS compliant and halogen-free?

Yes - Diodes Incorporated confirms UF1005-T meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with no brominated flame retardants in the UL 94V-0 molded package.

How does UF1005-T perform under capacitive load conditions?

Per datasheet Note 1, current must be derated by 20% for capacitive loads. At 55°C ambient, the usable average current drops from 1.0 A to 0.8 A to prevent excessive surge stress during capacitor charging transients.