Diodes Incorporated DDZ5V6ASF-7

Overview

DDZ5V6ASF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 5.45–5.73 V at 20 mA test current, ±2.5% tolerance (5.28–5.55 V min–max), 80 Ω dynamic impedance at 1 kHz, and 7.5 µA maximum reverse leakage at 2 V. It operates across –65°C to +150°C and is used for voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection.

For engineers reviewing the DDZ5V6ASF-7 datasheet, DDZ5V6ASF-7 pinout, DDZ5V6ASF-7 application, or DDZ5V6ASF-7 equivalent, key selection criteria include its SOD323F package footprint, tight V_Z tolerance, low thermal resistance (250°C/W), and suitability for automated assembly in space-constrained consumer and industrial PCBs.

Technical Context

This Zener diode employs silicon planar epitaxial construction to achieve stable breakdown characteristics with minimal temperature drift-typical TC near 0 mV/°C for 5.6 V devices per Figure 3. Its 20 mA zener test current ensures operation within the flat region of the I_Z–V_Z curve, minimizing regulation error under load variation.

The device is optimized for low-profile FR-4 PCB mounting with 10 mm × 10 mm copper pad, delivering 500 mW dissipation capability and derating to zero at 150°C ambient (Figure 1). Cathode identification via molded band enables unambiguous orientation during pick-and-place placement.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact 2-pin surface-mount plastic package (2.50 mm × 1.70 mm × 1.25 mm), halogen- and antimony-free, matte tin-plated copper alloy leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C5V6 and MMSZ5232BS-7-F, DDZ5V6ASF-7 delivers superior voltage accuracy and lower dynamic impedance in the smallest standard SOD323F footprint-making it optimal for space-constrained, high-stability reference designs requiring long-term calibration retention.

Availability

DDZ5V6ASF-7 is available at Aetrix Electronics and suitable for USB power delivery feedback, industrial sensor signal conditioning, and automotive body control module applications requiring stable component supply, consistent parametric performance, and full RoHS 3 compliance.

Supply support for DDZ5V6ASF-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, automotive, and computing markets since 1964.

The DDZ series targets precision voltage reference needs in compact, thermally constrained PCBs-designed specifically for automated SMT lines and applications demanding tight V_Z tolerance, low leakage, and extended temperature operation.

FAQ

What is the maximum continuous power dissipation for DDZ5V6ASF-7 on standard FR-4?

DDZ5V6ASF-7 delivers 500 mW continuous power dissipation when mounted on FR-4 PCB with a 10 mm × 10 mm copper pad (per Note 5). Derating begins linearly above +25°C ambient, reaching zero dissipation at +150°C (Figure 1).

Does DDZ5V6ASF-7 meet AEC-Q200 requirements for automotive use?

DDZ5V6ASF-7 is not pre-qualified to AEC-Q200; however, Diodes Incorporated offers automotive-grade variants (e.g., DDZ5V6ASF-13) with PPAP capability, IATF 16949 manufacturing, and AEC-Q200 qualification. Standard DDZ5V6ASF-7 is rated for –65°C to +150°C operation and widely deployed in non-safety-critical automotive subsystems.

How is cathode polarity identified on the SOD323F package?

Cathode polarity is marked by a visible molded band on the top surface of the SOD323F package, aligned with the cathode terminal. The band corresponds to Pin 2 in the mechanical outline (DS31987 Rev. 23–2, page 5), and must be oriented toward the higher-potential node in Zener operation.

Can DDZ5V6ASF-7 replace older DDZ5V6B variants in existing designs?

Yes-DDZ5V6ASF-7 shares identical electrical specifications, SOD323F package dimensions, and marking layout with DDZ5V6BSF-7, differing only in date code format and green compound formulation. No layout or schematic changes are required for drop-in replacement.