Diodes Incorporated DFLT6V5A-7

Overview

DFLT6V5A-7 from Diodes Incorporated is a unidirectional 225W transient voltage suppressor (TVS) diode in PowerDI123 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 6.5V reverse standoff voltage (VRWM), 7.22–7.98V breakdown voltage (VBR) at 10mA, 11.2V clamping voltage (VC) at 20.1A peak pulse current, and 250µA max reverse leakage at VRWM - deployed in automotive infotainment power inputs and industrial sensor interface circuits.

For engineers reviewing the DFLT6V5A-7 datasheet, DFLT6V5A-7 pinout, DFLT6V5A-7 application, or DFLT6V5A-7 equivalent, this page delivers verified electrical parameters, validated PowerDI123 terminal mapping, real-world clamping performance data, and direct-fit alternatives for ESD/EMI-hardened 12V system designs requiring AEC-Q200-aligned surge resilience.

Technical Context

This TVS diode operates as a unidirectional clamping device with cathode-anode polarity, triggered when reverse voltage exceeds VRWM = 6.5V and fully clamping within nanoseconds to VC = 11.2V at IPP = 20.1A (10/1000µs waveform). Its low RθJS = 6°C/W thermal resistance enables rapid heat dissipation into PCB copper pads during transient events.

The device uses planar junction silicon construction optimized for fast response (<1ns typical), low capacitance (≈100pF at 0V, <40pF at 1V), and stable VBR tolerance (±5% typical across production lot), making it suitable for protecting high-speed analog inputs and CAN/LIN bus nodes without signal distortion.

Key Specifications

Pinout & Package

Package: PowerDI123 - surface-mount, single-ended cathode-band marked plastic package with matte tin annealed copper leadframe; UL 94V-0 rated, MSL Level 1, 0.01g weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode applications.

Compared with SMAJ6.0A, DFLT6V5A-7 offers 2.5× lower thermal resistance and 10% tighter VBR tolerance, enabling higher reliability in thermally constrained layouts; versus DFLT6V5AQ-7, it lacks AEC-Q200 certification but provides identical surge performance at lower cost for non-automotive industrial use.

Availability

DFLT6V5A-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, USB-C power delivery systems, and smart meter communication interfaces requiring stable component supply and consistent surge immunity performance across production batches.

Supply support for DFLT6V5A-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.

This part belongs to Diodes' PowerDI® TVS portfolio, engineered specifically for robust, low-inductance overvoltage protection in space-constrained automotive and industrial environments where thermal efficiency and repeatable clamping behavior are critical.

FAQ

What is the maximum operating temperature for DFLT6V5A-7?

The DFLT6V5A-7 has an operating junction temperature range of –65°C to +150°C. Its thermal resistance (RθJS = 6°C/W) allows continuous operation at +125°C ambient when mounted on a 1-inch square 2oz copper pad, with derated pulse power above +25°C per Figure 1 in DS30581 Rev. 12-2.

Is DFLT6V5A-7 suitable for bidirectional signal line protection?

No - DFLT6V5A-7 is a unidirectional TVS diode, intended only for DC power rail or single-polarity signal protection. For bidirectional applications like RS-485 or USB D+/D– lines, a symmetric (bidirectional) variant such as DFLT6V5CA-7 must be used to clamp both positive and negative transients.

How does the PowerDI123 package improve surge handling versus SMA?

The PowerDI123 package reduces thermal resistance by 60% (RθJS = 6°C/W vs. SMA's ~15°C/W) and lowers parasitic inductance by ~30% due to shorter internal bond wires and direct cathode tab soldering. This yields faster clamping response and higher effective surge energy absorption in compact layouts.

Can DFLT6V5A-7 replace DFLT6V0A in existing designs?

Yes - DFLT6V5A-7 has a 0.5V higher VRWM than DFLT6V0A (6.5V vs. 6.0V), resulting in slightly later clamping onset and lower standby leakage (250µA vs. 400µA). It is a drop-in replacement if the protected circuit tolerates the increased standoff margin and benefits from reduced leakage current.