Diodes Incorporated DFLU1400-7

Overview

DFLU1400-7 from Diodes Incorporated is a 1.0A, 400V surface-mount super-fast rectifier diode in PowerDI®123 package, featuring 25ns reverse recovery time, 1.25V forward voltage at 1.0A, and 30A non-repetitive surge capability-designed for high-frequency switching power supplies and AC/DC adapters.

For engineers reviewing the DFLU1400-7 datasheet, DFLU1400-7 pinout, DFLU1400-7 application, or DFLU1400-7 equivalent, key selection criteria include fast recovery performance under high-frequency operation, thermal resistance (R_ΘJA = 117°C/W), low capacitance (14pF), and RoHS-compliant green packaging with matte tin annealed terminals.

Technical Context

This super-fast rectifier employs glass-passivated die construction and patented interlocking clip design to achieve high surge tolerance and stable junction-to-soldering-point thermal resistance of 6°C/W. Its 25ns trr enables efficient operation in PFC stages and secondary-side rectification above 100kHz.

Rated for 400V peak repetitive reverse voltage and 1.0A average forward current, it supports derated operation up to +150°C junction temperature with defined DC forward current derating curves and thermal impedance limits per JEDEC-standard mounting on 1"×1" 2oz Cu FR-4 PCB.

Key Specifications

Pinout & Package

DFLU1400-7 uses the PowerDI®123 surface-mount package: molded green plastic case (UL 94V-0), cathode band marking, and matte tin–annealed copper leadframe terminals. Dimensions: 3.70mm × 1.78mm × 1.00mm (L × W × H).

Key Features

Applications

Availability

DFLU1400-7 is available at Aetrix Electronics and suitable for AC/DC adapters, switch-mode power supplies, power factor correction circuits, and DC-DC converter inputs requiring stable component supply and RoHS-compliant green packaging.

Supply support for DFLU1400-7 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, serving industrial, computing, communications, and consumer markets with high-reliability components.

The DFLU1400-7 belongs to Diodes' PowerDI® super-fast rectifier product line, engineered specifically for high-efficiency, high-frequency AC/DC and DC/DC conversion where low recovery time and thermal robustness are critical.

FAQ

What is the maximum junction temperature rating for DFLU1400-7?

The DFLU1400-7 has an operating junction temperature range of –65°C to +150°C. This allows reliable operation in harsh environments such as enclosed industrial power supplies or automotive under-hood auxiliary converters when mounted per AP02001 pad layout and derated per Figure 4.

Is DFLU1400-7 compatible with lead-free reflow soldering processes?

Yes-DFLU1400-7 features matte tin–annealed terminals qualified to MIL-STD-202, Method 208, and is rated for standard Pb-free reflow profiles (peak ≤260°C). Its PowerDI®123 package meets J-STD-020C Level 1 moisture sensitivity, eliminating bake requirements before assembly.

How does the patented interlocking clip improve surge performance?

The US Patent #7,095,113 interlocking clip mechanically anchors the die to the leadframe, reducing bond wire stress and improving current distribution during 8.3ms half-sine surges. This enables the 30A I_FSM rating-3× higher than comparable SOD-123 devices-without delamination or thermal runaway.

Can DFLU1400-7 replace UF4007 in existing designs?

Yes-DFLU1400-7 matches UF4007's 400V V_RRM and 1.0A I_O, but offers faster t_rr (25ns vs. 75ns), lower V_FM (1.25V vs. 1.7V), and superior thermal resistance (R_ΘJA = 117°C/W vs. ~150°C/W). No layout change is needed due to identical PowerDI®123 footprint.