Diodes Incorporated DFLS240-7

Overview

DFLS240-7 from Diodes Incorporated is a 2.0A surface-mount Schottky barrier rectifier in PowerDI123 package, rated for 40V peak repetitive reverse voltage and 0.52V forward voltage at 1.0A. It features guard ring die construction for transient protection, patented interlocking clip design for 40A non-repetitive surge current, and is RoHS-compliant with halogen/antimony-free "Green" molding compound. Used in DC-DC converter output rectification and low-voltage power supplies.

For engineers reviewing the DFLS240-7 datasheet, DFLS240-7 pinout, DFLS240-7 application, or DFLS240-7 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance to solder point (13°C/W), leakage current at 40V (≤20µA @ 25°C), surge current capability (40A), and automotive-qualified variant availability (DFLS240Q).

Technical Context

This Schottky rectifier employs a guard ring die structure to suppress edge breakdown and improve transient robustness under fast-rising reverse voltage conditions. Its interlocking clip leadframe design enhances mechanical bond integrity and thermal path efficiency from junction to cathode tab.

Optimized for low-loss operation in high-frequency switching topologies, it delivers 0.58V typical VF at 2.0A and exhibits only 28pF total capacitance at 10V reverse bias-enabling minimal switching loss and reduced EMI in buck converter outputs and OR-ing circuits.

Key Specifications

Pinout & Package

Package: PowerDI123 - Surface-mount, single-ended, 2-terminal plastic package with exposed cathode tab for thermal and electrical connection. Dimensions: 3.70mm × 1.78mm × 1.00mm (L × W × H), weight ≈ 0.01g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB240-E3/54 and SS24, DFLS240-7 uniquely combines SMT compatibility, 13°C/W RθJS, AEC-Q-aligned qualification, and 40A surge rating-making it optimal for compact, thermally constrained, and reliability-critical 2A power paths.

Availability

DFLS240-7 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, USB PD OR-ing, low-voltage battery charging circuits, and industrial sensor node power management requiring stable component supply across production lifecycles.

Supply support for DFLS240-7 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, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The PowerDI® rectifier product line targets high-efficiency, high-reliability power conversion in space-constrained applications-emphasizing low VF, robust surge capability, and automotive/industrial qualification.

FAQ

What is the maximum junction temperature for continuous operation?

The DFLS240-7 has an operating junction temperature range of –65°C to +125°C. For reliable long-term operation at 2.0A average current, PCB thermal design must limit TJ to ≤125°C-achievable with ≥74 mm² 2oz copper pad and ambient ≤85°C per the derating curve in Figure 4.

Is DFLS240-7 suitable for automotive applications?

DFLS240-7 itself is not automotive-qualified, but its automotive-compliant variant DFLS240Q is available under a separate datasheet and qualified to AEC-Q200. The -7 version meets JEDEC high-reliability standards and shares identical electrical specs, making it suitable for industrial and commercial automotive-adjacent systems where full AEC-Q is not mandated.

How does the interlocking clip design improve surge performance?

The patented interlocking clip leadframe increases mechanical bond strength between the die and cathode tab while reducing thermal resistance. This allows the device to absorb 40A of 8.3ms surge current without bond wire lift-off or solder joint fracture-verified per JESD22-A112 test conditions.

Can DFLS240-7 replace a standard PN rectifier in existing designs?

Yes-DFLS240-7 can directly replace PN rectifiers like 1N5819 in SMT layouts using the same PowerDI123 footprint. Its lower VF (0.58V vs. ~0.75V) reduces conduction loss, but designers must verify reverse leakage impact in high-impedance bias networks due to Schottky's inherently higher IR than PN devices.