Diodes Incorporated DDZ2V7BSF-7

Overview

DDZ2V7BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode in SOD323F package, delivering tightly regulated 2.69–2.91 V zener voltage at 20 mA test current, with 110 Ω dynamic impedance and <120 µA reverse leakage at 1 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog sensing, power supply feedback, and battery monitoring circuits.

For engineers reviewing the DDZ2V7BSF-7 datasheet, DDZ2V7BSF-7 pinout, DDZ2V7BSF-7 application, or DDZ2V7BSF-7 equivalent, this part supports precision biasing, voltage regulation, and signal-level clamping where ±2.5% V_Z tolerance, low thermal resistance (250 °C/W), and AEC-Q200-compatible manufacturing are critical selection criteria.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 2.80 V (typical midpoint), specified at I_ZT = 20 mA and measured within 40 ms to minimize self-heating effects. Its temperature coefficient is approximately −3.5 mV/°C near 2.8 V, consistent with low-voltage Zener behavior.

The device uses a planar epitaxial construction on a copper alloy leadframe with matte tin annealed terminations, enabling reliable solderability per MIL-STD-202, Method 208. Its SOD323F package provides a compact 1.70 mm × 1.25 mm footprint with cathode band polarity marking and moisture sensitivity level 1 compliance.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-small plastic surface-mount package (1.70 mm × 1.25 mm × 0.95 mm), molded with halogen-free green compound, UL 94V-0 rated, cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B2V7 and MMSZ4678T1G, DDZ2V7BSF-7 offers superior V_Z tolerance, higher power capability, and lower thermal resistance in the same SOD323F footprint-making it optimal for space-constrained, high-stability 2.8 V reference designs requiring long-term calibration retention.

Availability

DDZ2V7BSF-7 is available at Aetrix Electronics and suitable for precision voltage reference, analog sensor biasing, and low-power power supply feedback applications requiring stable component supply and full RoHS 3 compliance.

Supply support for DDZ2V7BSF-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.

This part belongs to the DDZxx(x)SF precision Zener series, engineered for stable voltage referencing in automated SMT assembly environments with stringent environmental compliance requirements.

FAQ

What is the maximum continuous reverse current the DDZ2V7BSF-7 can sustain without degradation?

The device is rated for 20 mA zener test current (I_ZT) and 500 mW power dissipation. At 2.8 V, sustained operation above ~178 mA would exceed P_D, risking thermal runaway. For reliable long-term use, keep average reverse current ≤15 mA with adequate PCB copper area for heat spreading.

Does the DDZ2V7BSF-7 meet AEC-Q200 stress testing requirements?

While not individually qualified to AEC-Q200, this part is manufactured in IATF 16949-certified facilities using automotive-grade processes and materials. Diodes states that parts in this family are "for automotive applications requiring specific change control" and PPAP-capable-confirming suitability for automotive use with proper system-level validation.

How does the SOD323F package differ electrically from standard SOD323?

SOD323F features a modified leadframe geometry and green molding compound, resulting in identical electrical characteristics but improved moisture resistance (J-STD-020 Level 1) and enhanced thermal performance due to optimized die attach and mold compound thermal conductivity-verified in Diodes' thermal characterization data.

Can DDZ2V7BSF-7 be used in series to achieve higher reference voltages?

Yes-two units in series yield ~5.6 V with matched V_Z tolerance, but total dynamic impedance doubles (~220 Ω). Thermal tracking between devices is not guaranteed; for multi-Zener references, consider dedicated series-reference ICs like TL431 for better stability and temperature coefficient matching.