Diodes Incorporated DDZ24DSF-7

Overview

DDZ24DSF-7 from Diodes Incorporated is a precision 24 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±2.5% tolerance (23.63–24.85 V at 5 mA), 60 Ω dynamic impedance, and 0.07 µA reverse leakage at 22.4 V. It delivers stable reference performance in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.

For engineers reviewing the DDZ24DSF-7 datasheet, DDZ24DSF-7 pinout, DDZ24DSF-7 application, or DDZ24DSF-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (250 °C/W), low leakage current, and SOD323F footprint compatibility with high-density PCB layouts.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining a stable output by conducting reverse current above its specified breakdown threshold. Its 5 mA test current and tight 2.5% V_Z tolerance ensure predictable regulation across production batches.

The SOD323F package enables automated placement and reflow soldering, with a 0.004 g mass and UL 94V-0 molding compound. Thermal resistance of 250 °C/W (on FR-4) and operation from –65 °C to +150 °C support use in industrial and automotive-adjacent environments.

Key Specifications

Pinout & Package

Package: SOD323F - molded plastic, halogen/antimony-free "Green" compound, UL 94V-0 rated, moisture sensitivity level 1 per J-STD-020. Cathode identified by band marking; terminals feature matte tin annealed finish over copper alloy leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C24LT1G and MMSZ4686T1G, DDZ24DSF-7 offers tighter voltage tolerance and lower dynamic impedance in a smaller SOD323F package-critical for space-constrained, high-accuracy regulation where thermal management and long-term stability are prioritized.

Availability

DDZ24DSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, programmable logic controller input stages, and test equipment calibration references requiring stable component supply and consistent parametric performance across production lots.

Supply support for DDZ24DSF-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, specializing in high-reliability components for industrial, computing, and automotive markets with ISO/TS 16949-certified manufacturing.

The DDZ series targets precision voltage reference and regulation in space-constrained, thermally demanding applications-designed specifically for automated assembly and long-term parametric stability in harsh ambient conditions.

FAQ

What is the maximum continuous power dissipation for DDZ24DSF-7 on a standard FR-4 PCB?

The DDZ24DSF-7 is rated for 500 mW maximum power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad on a 35 mm × 25 mm board. This rating assumes natural convection cooling and must be derated linearly above +25 °C ambient per the published power derating curve (250 °C/W junction-to-ambient thermal resistance).

How does the 0.07 µA reverse leakage at 22.4 V impact its use in high-impedance voltage divider networks?

This ultra-low leakage ensures negligible current diversion from divider resistors ≥1 MΩ, preserving voltage division ratio accuracy. In a 1 MΩ–1 MΩ divider sourcing a 24 V reference, leakage contributes <0.007% error-well within typical 0.1% resistor tolerance bands and essential for precision ADC reference scaling.

Is DDZ24DSF-7 qualified for automotive applications per AEC-Q101?

No-DDZ24DSF-7 is not AEC-Q101 qualified. While manufactured in IATF 16949-certified facilities and meeting RoHS/halogen-free requirements, it lacks the extended temperature cycling, HTRB, and ESD validation required for automotive qualification. For AEC-Q101-compliant alternatives, contact Diodes Incorporated directly.

Can DDZ24DSF-7 replace older DDZ24ASF or DDZ24BSF variants in existing designs?

Yes-DDZ24DSF-7 shares identical electrical specifications (V_Z, Z_ZT, I_R) and SOD323F package with earlier DDZ24ASF/BSF variants, differing only in tighter process control and updated marking code (2L). No layout or schematic changes are required for drop-in replacement in legacy designs.