Diodes Incorporated DDZ11CQ-7

Overview

DDZ11CQ-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 11.1 V (min 10.82 V, max 11.38 V), 10 mA test current, 10 Ω maximum zener impedance at 1 kHz, and ±0.1 µA maximum reverse leakage at 8.4 V. It operates in SOD123 package and serves as voltage reference or overvoltage clamp in power supply feedback loops and analog signal conditioning circuits.

For engineers reviewing the DDZ11CQ-7 datasheet, DDZ11CQ-7 pinout, DDZ11CQ-7 application, or DDZ11CQ-7 equivalent, key selection criteria include tight zener voltage tolerance (±2.5% at 11.1 V), low dynamic impedance for stable regulation, AEC-Q101 qualification for automotive use, and SOD123 thermal performance under 294 mW derated power at +25°C ambient.

Technical Context

This device functions as a two-terminal voltage reference where reverse-biased operation establishes a stable breakdown voltage across its cathode–anode terminals. Its zener voltage exhibits a positive temperature coefficient of +0.05%/°C near 11 V, enabling predictable drift behavior in temperature-varying environments.

The SOD123 package supports automated placement and reflow soldering, with matte tin–annealed Alloy 42 leads ensuring MIL-STD-202-compliant solderability. Thermal resistance junction-to-ambient is 425 °C/W under minimal pad layout, limiting power handling to 294 mW at +25°C.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with cathode band marking; 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; weight ≈ 0.01 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11LT1G and MMSZ5240BT1G, DDZ11CQ-7 delivers superior voltage accuracy (±2.5% vs. ±5%) and lower dynamic impedance (10 Ω vs. ≥15 Ω), directly improving closed-loop regulation stability in feedback-critical applications like automotive power management.

Availability

DDZ11CQ-7 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and medical instrumentation requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDZ11CQ-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 DDZ series targets precision voltage reference needs in automotive, industrial, and medical systems, emphasizing tight tolerance, low impedance, and AEC-Q101 reliability for mission-critical analog functions.

FAQ

What is the maximum continuous power dissipation for DDZ11CQ-7 at +75°C ambient?

At +75°C ambient, DDZ11CQ-7 supports 500 mW continuous power dissipation when mounted with lead temperature controlled to +75°C (R_θJL = 132°C/W). This exceeds its 294 mW rating at +25°C ambient with minimal pad layout, enabling higher bias currents in thermally managed designs.

How does the cathode band marking align with SOD123 physical orientation?

The cathode band on DDZ11CQ-7 corresponds to the end of the SOD123 package with the larger molded edge (He dimension: 3.55–3.85 mm); it aligns with the "K" marking in top-view diagrams and must connect to the higher-potential node in reverse-bias operation.

Is DDZ11CQ-7 compatible with lead-free reflow profiles per J-STD-020?

Yes - DDZ11CQ-7 has Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. Its matte tin–annealed leads withstand peak temperatures up to 260°C in standard Pb-free reflow cycles.

What is the typical capacitance of DDZ11CQ-7 at 1 MHz and 2 V reverse bias?

At 1 MHz and 2 V reverse bias, DDZ11CQ-7 exhibits approximately 35 pF total capacitance, consistent with the 11 V nominal zener voltage curve in Figure 10 of DS30407 Rev. 21-2. This value remains stable across production lots due to controlled junction area and doping profile.