Diodes Incorporated DDZ11B-7

Overview

DDZ11B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 10.50–11.05 V at 10 mA test current, 10 Ω zener impedance at 1 kHz, and ±0.1 µA maximum reverse leakage at 8.4 V. It uses SOD123 package, operates from –65 °C to +150 °C, and serves as voltage reference or overvoltage clamp in power supply feedback loops.

For engineers reviewing the DDZ11B-7 datasheet, DDZ11B-7 pinout, DDZ11B-7 application, or DDZ11B-7 equivalent, key selection criteria include zener voltage tolerance (±2.5% at 10 mA), thermal resistance (425 °C/W on minimal pad layout), low capacitance (~10 pF), AEC-Q101 qualification status, and SOD123 footprint compatibility with automated placement.

Technical Context

This device functions as a two-terminal voltage reference where cathode-band polarity defines reverse-bias operation. Its tight 2.5% V_Z tolerance and low 10 Ω dynamic impedance ensure stable regulation under varying load currents up to 10 mA. Temperature coefficient is +0.06%/°C typical across its operating range.

The SOD123 package enables high-density PCB layouts while maintaining 294 mW power dissipation on minimal copper pads. Reverse leakage remains ≤0.1 µA at 8.4 V, supporting low-power biasing and precision sensing applications without significant error contribution.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.01 g; UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11LT1G and MMSZ4685T1G, DDZ11B-7 delivers superior initial accuracy and lower dynamic impedance in the identical SOD123 footprint-making it optimal for high-stability feedback and low-drift biasing where board space and thermal constraints are fixed.

Availability

DDZ11B-7 is available at Aetrix Electronics and suitable for switching power supplies, automotive sensor interfaces, industrial PLC inputs, and medical instrument references requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDZ11B-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.

DDZ11B-7 belongs to the DDZ series of precision Zener diodes engineered for high-accuracy voltage referencing in automotive, industrial, and computing power systems where tight tolerance and thermal stability are critical.

FAQ

What is the maximum continuous reverse current DDZ11B-7 can sustain without degradation?

DDZ11B-7 is rated for 10 mA zener test current (I_ZT) and supports continuous reverse current up to this level under derated power conditions. At 25 °C ambient on minimal pad layout, its 294 mW power limit corresponds to ~26.7 mA at 11 V, but sustained operation above 10 mA requires thermal verification due to rising junction temperature and potential V_Z drift.

Does DDZ11B-7 meet AEC-Q101 requirements for automotive use?

No-DDZ11B-7 is the commercial-grade variant. The automotive-qualified version is DDZ11BQ-7, which carries AEC-Q101 qualification, PPAP capability, and is manufactured in IATF16949-certified facilities. DDZ11B-7 shares identical electrical and mechanical specifications but lacks formal automotive change control documentation.

How does the SOD123 package affect thermal performance compared to larger packages?

The SOD123 package limits thermal dissipation: R_θJA is 425 °C/W on minimal pads versus 266 °C/W on 1-in² copper. This means a 100 mW power dissipation raises junction temperature by ~42.5 °C above ambient in compact layouts-requiring careful PCB copper area allocation or derating in high-temperature environments.

Can DDZ11B-7 be used in series or parallel configurations for higher voltage or current handling?

Series connection is viable for higher reference voltages (e.g., two DDZ11B-7 yield ~22 V), but matching V_Z tolerances compounds error. Parallel use is not recommended-minor V_Z mismatches cause current hogging and thermal instability. For higher current, select a single higher-power Zener or active reference IC instead.