Diodes Incorporated DDZ9703Q-7

Overview

DDZ9703Q-7 from Diodes Incorporated is a surface-mount, low-current, AEC-Q101 qualified Zener diode in SOD123 package, with nominal zener voltage of 16 V (min 15.2 V, max 16.8 V), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It delivers stable voltage reference in automotive body control modules, battery management sensing circuits, and low-power microcontroller reset supervision.

For engineers reviewing the DDZ9703Q-7 datasheet, DDZ9703Q-7 pinout, DDZ9703Q-7 application, or DDZ9703Q-7 equivalent, this part is selected for precision low-bias voltage regulation in space-constrained, thermally demanding automotive environments where leakage <0.05 µA at VR = 12.1 V and temperature coefficient stability across –65°C to +150°C are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5% at 16 V) and ultra-low reverse leakage (≤0.05 µA @ VR = 12.1 V), enabling accurate voltage clamping and reference generation in low-quiescent-current systems. Its thermal resistance junction-to-lead is 150°C/W, supporting reliable operation under transient thermal loads in automotive under-hood applications.

The device uses alloy 42 leadframe with matte tin annealed finish, rated for solderability per MIL-STD-202 Method 208, and features cathode band polarity marking. It is halogen- and antimony-free, meeting IATF 16949 manufacturing standards and RoHS 3 (2015/863/EU) compliance.

Key Specifications

Pinout & Package

Package: SOD123 - Surface-mount plastic case (UL 94V-0), 0.01 g weight, moisture sensitivity level 1, cathode band marked on top surface. Dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm, He = 3.55–3.85 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C16-7-F and MMSZ5245B-TP, DDZ9703Q-7 uniquely combines automotive qualification, sub-0.1 µA leakage, and 500 mW thermal capability-making it the sole choice for AEC-compliant 16 V reference designs requiring both longevity and robustness.

Availability

DDZ9703Q-7 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and portable medical device power supervision requiring stable component supply with full traceability and long-lifecycle support.

Supply support for DDZ9703Q-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 DDZ9xxxQ series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for automotive voltage reference and protection applications where reliability, low leakage, and thermal resilience are mandatory.

FAQ

What is the maximum reverse leakage current for DDZ9703Q-7, and at what voltage is it specified?

The maximum reverse leakage current is 0.05 µA, measured at VR = 12.1 V and TA = +25°C. This value is confirmed in the Electrical Characteristics table of DS30410 Rev. 17–2, and remains ≤0.5 µA up to +125°C per Fig. 21 leakage vs. temperature curves.

Is DDZ9703Q-7 compatible with lead-free reflow profiles, and what is its moisture sensitivity level?

Yes, DDZ9703Q-7 is fully compatible with IPC/JEDEC J-STD-020D.1 lead-free reflow profiles, with peak temperature up to 260°C. Its moisture sensitivity level is Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly.

Does DDZ9703Q-7 have a specified zener impedance, and how does it vary with current?

Yes-zener impedance is 50 Ω typical at IZT = 50 µA and decreases to ~25 Ω at IZ = 1 mA (per Fig. 13). This low dynamic impedance ensures minimal output voltage variation under load transients in precision reference applications.

Can DDZ9703Q-7 be used in place of a 1N4744A in an existing design?

No-while both regulate near 16 V, DDZ9703Q-7 has 50 µA test current and 0.05 µA leakage, whereas 1N4744A uses 17 mA IZT and 5 µA IR. Substituting requires redesigning bias networks to avoid insufficient Zener conduction or excessive standby current.