Diodes Incorporated DDZ14-7

Overview

DDZ14-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 13.65–14.35 V at 10 mA test current, 16 Ω zener impedance at 1 kHz, and 0.05 µA maximum reverse leakage at 11.0 V. It delivers stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.

For engineers reviewing the DDZ14-7 datasheet, DDZ14-7 pinout, DDZ14-7 application, or DDZ14-7 equivalent, this device is selected for tight-tolerance voltage regulation where thermal stability (±0.08%/°C typical TC), SOD123 package compatibility, and AEC-Q200-adjacent reliability are required in industrial and automotive subsystems.

Technical Context

This Zener diode operates in reverse breakdown mode with specified zener voltage tolerance of ±2.5% at I_ZT = 10 mA and exhibits low dynamic impedance (16 Ω) to maintain regulation under varying load conditions. Its thermal resistance (R_θJA = 425 °C/W on minimal pad layout) defines derating behavior across ambient temperatures up to +150°C.

The device uses alloy 42 leadframe with matte tin annealed terminations, rated for solderability per MIL-STD-202 Method 208, and conforms to J-STD-020 moisture sensitivity Level 1. Cathode identification is marked by a band on the SOD123 body.

Key Specifications

Pinout & Package

DDZ14-7 is housed in the SOD123 plastic package: 2.55–2.85 mm wide, 1.00–1.35 mm height, 3.55–3.85 mm length, with cathode identified by a band on the body. Terminations are matte tin annealed over alloy 42 leadframe, solderable per MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C13LT1G and MMSZ4687T1G, DDZ14-7 offers superior voltage accuracy (±2.5% vs. ±5%), lower dynamic impedance (16 Ω vs. ≥30 Ω), and significantly reduced leakage (0.05 µA vs. ≥1 µA), making it optimal for precision reference and low-quiescent systems.

Availability

DDZ14-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive cabin controllers, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDZ14-7 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 automotive, industrial, and computing markets.

DDZ14-7 belongs to the DDZ series of precision Zener diodes designed specifically for stable voltage reference and clamping in space-constrained, thermally demanding applications where tight tolerance and low leakage are critical.

FAQ

What is the maximum continuous power dissipation for DDZ14-7 at 75°C ambient?

At T_L = +75°C, DDZ14-7 supports 500 mW continuous power dissipation per the datasheet's Note 6. This rating assumes proper thermal coupling to the PCB via recommended pad layout and applies only when lead temperature is monitored directly-not ambient temperature. Derating curves in Figure 1 must be followed for operation above 75°C.

Is DDZ14-7 qualified for automotive applications?

DDZ14-7 is the commercial-grade variant. The automotive-qualified version is DDZ14Q-7, which is AEC-Q101 certified, PPAP capable, and manufactured in IATF16949-certified facilities. DDZ14-7 itself is not AEC-Q101 qualified but shares identical electrical and mechanical specifications except for change control and traceability documentation.

How does the cathode band orientation relate to PCB layout in SOD123?

The cathode band on DDZ14-7 corresponds to Pin 1 in the SOD123 outline: it aligns with the larger copper pad (X1 = 4.05 mm) in the recommended footprint. During placement, the band must face the designated cathode net; misorientation causes forward conduction instead of Zener regulation, resulting in failed voltage clamping or reference function.

What is the typical junction-to-ambient thermal resistance when mounted on a 1-in² copper pad?

When mounted on an FR-4 board with a 1-in² copper pad (2 oz, single-sided), DDZ14-7 exhibits R_θJA = 266 °C/W per Note 7. This value enables calculation of junction temperature rise (ΔT_J = P_D × R_θJA) to verify safe operation within the −65 to +150°C range under actual power dissipation conditions.