Diodes Incorporated DDZ12CSF-7

Overview

DDZ12CSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage 11.74–12.35 V at 10 mA test current, 35 Ω maximum zener impedance at 1 kHz, and 0.07 µA reverse leakage at 11.20 V. It operates across –65 °C to +150 °C and is used for voltage regulation and reference in power supply feedback loops.

For engineers reviewing the DDZ12CSF-7 datasheet, DDZ12CSF-7 pinout, DDZ12CSF-7 application, or DDZ12CSF-7 equivalent, key selection criteria include tight V_Z tolerance (±2.6% typical), low thermal resistance (250 °C/W), SOD323F package compatibility with automated assembly, and AEC-Q200 readiness for automotive-grade designs.

Technical Context

This Zener diode delivers stable voltage reference performance under regulated DC bias conditions, with temperature coefficient optimized near zero crossing (~0 mV/°C) for 12 V-class devices per Figure 3. Its low 35 Ω dynamic impedance ensures minimal output voltage variation under load transients.

The device uses a planar epitaxial construction on FR-4 PCBs with 10 mm × 10 mm copper pads, enabling reliable 500 mW power dissipation at +25 °C ambient. Reverse leakage remains ≤0.07 µA up to 90% of rated V_Z, supporting high-impedance sensing and low-power standby circuits.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact surface-mount plastic package (2.50 mm × 1.25 mm × 0.95 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-C12LT1G and MMSZ5242B-TP, DDZ12CSF-7 offers tighter V_Z tolerance and identical power rating in a smaller SOD323F footprint-critical for space-constrained automotive and industrial modules requiring long-term voltage stability.

Availability

DDZ12CSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, medical sensor interfaces, and telecom line card designs requiring stable component supply with full traceability and lifecycle management.

Supply support for DDZ12CSF-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 belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and regulation in automotive, industrial, and medical applications demanding AEC-Q200 alignment and green compliance.

FAQ

What is the maximum continuous power dissipation for DDZ12CSF-7 on standard FR-4 PCB?

DDZ12CSF-7 is rated for 500 mW continuous power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad and board dimensions of 35 mm × 25 mm. Derating begins above +25 °C ambient per the curve in Figure 1, reaching ~300 mW at +85 °C ambient.

Does DDZ12CSF-7 meet automotive qualification standards?

DDZ12CSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 in this specific revision, its construction, testing protocol, and operating temperature range (–65 °C to +150 °C) align with AEC-Q200 stress test requirements for passive components.

How does the SOD323F package affect thermal performance compared to SOD-123?

The SOD323F package has a smaller footprint (2.50 mm × 1.25 mm vs. 3.7 mm × 1.6 mm) and lower thermal resistance (250 °C/W vs. ~300–350 °C/W for SOD-123), enabling higher power density in space-constrained layouts while maintaining equivalent or better junction-to-ambient heat transfer on properly designed PCBs.

What is the significance of the 'C' suffix in DDZ12CSF-7?

The 'C' in DDZ12CSF-7 denotes the third tolerance grade within the 12 V family: ±2.6% (11.74–12.35 V), tighter than 'B' (±3.0%) and 'A' (±5.0%). This grading enables selective binning for applications requiring higher regulation accuracy without custom trimming or external compensation.