Diodes Incorporated DDZX6V8C-13

Overview

DDZX6V8C-13 from Diodes Incorporated is a surface-mount precision Zener diode in SOT23 package, rated for 6.66–7.01 V nominal zener voltage at 20 mA test current, with 5 Ω maximum zener impedance at I_ZT, 0.5 μA maximum reverse leakage at 5.0 V, and 300 mW power dissipation on FR-4 PCB. It serves as a stable voltage reference in low-power analog sensing and regulator feedback paths.

For engineers reviewing the DDZX6V8C-13 datasheet, DDZX6V8C-13 pinout, DDZX6V8C-13 application, or DDZX6V8C-13 equivalent, key selection criteria include tight V_Z tolerance (±2.5%), low dynamic impedance, AEC-Q101 qualification, and SOT23 compatibility with automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode with sharp knee characteristics, enabling precise voltage regulation under low-current conditions (I_Z = 0.5–20 mA). Its thermal resistance of 417 °C/W (junction-to-ambient, FR-4) and operating temperature range of –65 to +150 °C support use in automotive and industrial environments.

The device exhibits a typical temperature coefficient of ~+0.04 %/°C near 6.8 V, confirmed by Figure 16 of DS30408 Rev. 13–2, and maintains <0.5 μA reverse leakage at VR = 5.0 V - critical for low-power biasing and reference stability.

Key Specifications

Pinout & Package

Package: SOT23 - three-terminal surface-mount plastic package with matte tin annealed terminals, UL 94V-0 rated molding compound, and 0.008 g typical weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision Zener reference applications.

Compared with BZX84-C6V8 and MMSZ4688, DDZX6V8C-13 delivers superior regulation accuracy (±2.5% vs. ±5%), lower dynamic impedance (5 Ω vs. ≥15 Ω), and verified AEC-Q101 compliance - making it the only choice for safety-critical automotive voltage references requiring long-term stability.

Availability

DDZX6V8C-13 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning circuits, and medical portable diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DDZX6V8C-13 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 components for automotive, industrial, and computing markets.

DDZX6V8C-13 belongs to the DDZX series of precision Zener diodes, designed specifically for applications demanding tight voltage tolerance, low dynamic impedance, and AEC-Q101 qualification in compact SOT23 packaging.

FAQ

What is the maximum power dissipation of DDZX6V8C-13 under standard PCB conditions?

DDZX6V8C-13 is rated for 300 mW power dissipation when mounted on an FR-4 PCB with Diodes Incorporated's recommended pad layout. Derating begins above +25 °C ambient, following the curve in Figure 1 of DS30408 - e.g., ~240 mW at +50 °C, ~180 mW at +75 °C.

Is DDZX6V8C-13 suitable for automotive applications?

Yes - DDZX6V8C-13 is explicitly qualified to AEC-Q101 standards for high-reliability automotive use. It undergoes stress testing including HTOL, temperature cycling, and ESD per AEC requirements, and is documented in Diodes' automotive-compliant product list.

How does the zener impedance affect regulation performance in feedback circuits?

Zener impedance (Z_ZT = 5 Ω max) directly determines output voltage deviation under changing load current: ΔV_Z ≈ I_Z × Z_ZT. At 1 mA current change, voltage shift is ≤5 mV - critical for maintaining ADC reference accuracy and op-amp common-mode stability.

What is the polarity marking convention for DDZX6V8C-13 in SOT23 package?

In top view, Pin 1 (anode) is identified by the device marking "YP" followed by date code; Pin 2 (cathode) is the center pin adjacent to the tab side; Pin 3 is non-connected. The cathode is the higher-potential terminal during reverse-bias operation, as shown in the SOT23 schematic on page 2 of DS30408.