Diodes Incorporated DDZ8V2BSF-7

Overview

DDZ8V2BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 7.78–8.19 V at 20 mA test current, ±5% tolerance, 30 Ω dynamic impedance, and 7.39 µA reverse leakage at 7.39 V. It operates from −65 °C to +150 °C and is used for voltage regulation and reference in power supply feedback loops, analog sensor biasing, and overvoltage protection circuits.

For engineers reviewing the DDZ8V2BSF-7 datasheet, DDZ8V2BSF-7 pinout, DDZ8V2BSF-7 application, or DDZ8V2BSF-7 equivalent, this part is selected for stable low-power voltage reference where tight V_Z tolerance, low Z_ZT, and AEC-Q200-compatible packaging are required in space-constrained PCB layouts.

Technical Context

This Zener diode employs silicon planar epitaxial construction optimized for stable breakdown characteristics under DC and low-frequency conditions. Its thermal resistance (R_θJA = 250 °C/W) is specified on FR-4 with 10 mm × 10 mm copper pad, enabling predictable derating above +25 °C ambient per Figure 1.

The device exhibits a temperature coefficient near zero at ~8.2 V (per Fig. 3), making DDZ8V2BSF-7 suitable for applications requiring minimal V_Z drift across industrial temperature ranges. Reverse leakage is measured using short-pulse testing to suppress self-heating artifacts.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact plastic-molded case with cathode band marking; dimensions: 1.25 mm × 1.70 mm × 0.75 mm (L × W × H); weight ≈ 0.004 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C8V2LT1G and MMSZ5236B-TP, DDZ8V2BSF-7 delivers identical V_Z accuracy and superior thermal performance in the smallest footprint (SOD323F), enabling higher power density in compact, thermally demanding designs.

Availability

DDZ8V2BSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive cabin electronics, IoT sensor nodes, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.

Supply support for DDZ8V2BSF-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.

This device belongs to Diodes' DDZ series of precision Zener diodes, engineered specifically for high-accuracy voltage reference and regulation in automotive, industrial, and medical applications where reliability and tight parametric control are critical.

FAQ

What is the maximum continuous Zener current for DDZ8V2BSF-7 at 25°C ambient?

The device is rated for 500 mW power dissipation on FR-4 with a 10 mm × 10 mm copper pad. At V_Z ≈ 8.0 V, this supports up to 62.5 mA continuous current. However, the datasheet specifies test conditions at I_ZT = 20 mA, and thermal derating begins above 25°C per Figure 1 - sustained operation above 20 mA requires careful thermal design.

Does DDZ8V2BSF-7 meet AEC-Q200 stress test requirements?

While the DDZ8V2BSF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation, it is not formally qualified to AEC-Q200. For automotive applications requiring AEC-Q200 certification, Diodes recommends contacting their automotive team to discuss qualified alternatives such as the AZ series.

How does the SOD323F package compare to SOD-123 in thermal performance?

SOD323F has R_θJA = 250 °C/W on FR-4 (10 mm × 10 mm pad), while typical SOD-123 devices exhibit R_θJA ≈ 300–350 °C/W under identical conditions. This 17–30% lower thermal resistance allows DDZ8V2BSF-7 to sustain higher power or operate at higher ambient temperatures before exceeding junction limits.

Can DDZ8V2BSF-7 be used in place of a 7.5 V Zener for improved regulation accuracy?

No - DDZ8V2BSF-7 is specified for 7.78–8.19 V, not 7.5 V. Using it as a 7.5 V reference would result in 3–10% over-regulation, potentially damaging downstream circuitry. For 7.5 V, select DDZ7V5BSF (7.07–7.45 V) or DDZ7V5CSF (7.29–7.67 V), both in the same SOD323F package.