Diodes Incorporated DDZ11ASF-7

Overview

DDZ11ASF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode in SOD323F package, delivering tightly regulated 10.18–10.71 V zener voltage at 10 mA test current, with 30 Ω dynamic impedance and only 0.07 µA reverse leakage at 9.67 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog sensing, power supply feedback, and automotive body electronics.

For engineers reviewing the DDZ11ASF-7 datasheet, DDZ11ASF-7 pinout, DDZ11ASF-7 application, or DDZ11ASF-7 equivalent, this page provides verified electrical parameters, thermal derating behavior, SOD323F terminal mapping, and direct alternatives for voltage reference design validation and BOM optimization.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 10.45 V (typical), specified at I_ZT = 10 mA and measured within 40 ms to minimize self-heating. Its temperature coefficient is +5.5 mV/°C (typical) near 10 V, enabling predictable drift compensation in ambient-variant circuits.

The device exhibits low dynamic impedance (Z_ZT ≤ 30 Ω @ 1 kHz), ensuring minimal output voltage variation under load transients, and maintains <0.07 µA reverse current at VR = 9.67 V - critical for high-impedance bias networks and battery-powered monitoring systems.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact plastic-molded case (2.50 mm × 1.70 mm × 1.25 mm), matte tin-plated copper alloy leadframe, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDZ11ASF-7, DDZ11BSF-7 offers higher nominal voltage but identical thermal and packaging performance, while BZX84-C10LT1G trades precision and power capability for lower cost and wider availability in legacy SOT-23 footprints.

Availability

DDZ11ASF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, USB-C power delivery monitors, and smart meter voltage supervisors requiring stable component supply and AEC-Q200-aligned manufacturing.

Supply support for DDZ11ASF-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US and manufacturing in IATF 16949-certified facilities.

The DDZxxASF/BSF/CSF/DSF series targets high-precision, low-power voltage reference needs in automotive, industrial, and consumer electronics - emphasizing tight V_Z tolerance, low leakage, and robust thermal performance in miniature packages.

FAQ

What is the maximum continuous reverse current DDZ11ASF-7 can sustain without degradation?

DDZ11ASF-7 is rated for 10 mA zener test current (I_ZT) and 500 mW power dissipation. At its nominal 10.45 V V_Z, sustained reverse current must remain ≤47.8 mA to stay within P_D limits. Derating applies above 25°C ambient per Fig. 1 - e.g., max I_Z drops to ~32 mA at 85°C ambient. Exceeding these values risks parametric shift or thermal runaway.

How does the SOD323F package affect thermal performance compared to SOD123?

SOD323F has higher thermal resistance (R_θJA = 250 °C/W) than SOD123 (typically ~200 °C/W) due to smaller pad area and thinner leads. To achieve full 500 mW rating, it requires a minimum 10 mm × 10 mm copper pour on FR-4 - unlike SOD123, which reaches 500 mW with 8 mm × 8 mm. This impacts layout density and heatsinking strategy in compact designs.

Can DDZ11ASF-7 be used in series to generate higher reference voltages?

Yes - two DDZ11ASF-7 diodes in series yield ~20.9 V nominal reference with matched V_Z tolerance (±2.5% each). However, dynamic impedance doubles to ~60 Ω, increasing output variation under load. For >15 V references, Diodes' DDZ20ASF-7 (19.5 V nominal) is preferred due to optimized Z_ZT and tighter matching across production lots.

Is DDZ11ASF-7 qualified for AEC-Q101 stress testing?

No - DDZ11ASF-7 is not AEC-Q101 qualified. While manufactured in IATF 16949 facilities and compliant with RoHS 3, halogen-free, and PPAP-capable processes, it lacks formal AEC-Q101 certification. For automotive applications requiring AEC-Q101, Diodes recommends the AZ-series (e.g., AZ11ASF-7), which undergoes full stress testing including HTGB, HTRB, and TCT.