Diodes Incorporated DDZ3V0BSF-7

Overview

DDZ3V0BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 3.01–3.22 V at 20 mA test current, 120 Ω dynamic impedance, and 50 µA maximum reverse leakage at 1 V reverse bias. It operates across –65°C to +150°C, features SOD323F package with cathode band marking, and is used for voltage reference and overvoltage protection in low-power analog sensor interfaces and power rail supervision circuits.

For engineers reviewing the DDZ3V0BSF-7 datasheet, DDZ3V0BSF-7 pinout, DDZ3V0BSF-7 application, or DDZ3V0BSF-7 equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and automotive-grade availability context - all critical for precision biasing, ADC reference stabilization, and compact board-level regulation design.

Technical Context

This Zener diode employs silicon planar epitaxial construction optimized for tight voltage tolerance (±3.4% at 3.115 V typical) and stable temperature coefficient near zero crossing (~0 mV/°C at ~3.3 V). Its 250°C/W junction-to-ambient thermal resistance is specified on FR-4 PCB with 10 mm × 10 mm copper pad, enabling predictable power derating above 25°C ambient.

The device exhibits 0.9 V forward voltage at 10 mA, supports automated reflow assembly per J-STD-020 Level 1 moisture sensitivity, and uses matte tin–annealed copper alloy leads for MIL-STD-202 compliant solderability. Cathode identification via molded band ensures unambiguous polarity during placement.

Key Specifications

Pinout & Package

SOD323F is a two-terminal surface-mount package with cathode identified by a molded band on the top surface. The device has no internal die attach pad or exposed thermal slug; thermal path relies entirely on leadframe conduction through printed circuit board copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B3V0 and MMSZ4684T1G, DDZ3V0BSF-7 offers superior voltage accuracy (±3.4% vs. ±5%), optimal SOD323F size for miniaturized layouts, and lower thermal resistance than SOD123 - making it preferred for high-density, temperature-stable reference designs.

Availability

DDZ3V0BSF-7 is available at Aetrix Electronics and suitable for precision voltage reference, low-power sensor biasing, and microcontroller reset supervision requiring stable component supply across industrial automation, medical instrumentation, and automotive subsystems.

Supply support for DDZ3V0BSF-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 device belongs to the DDZxx(x)SF precision Zener family, engineered for tight-tolerance voltage referencing in space-constrained, thermally demanding applications where stability and repeatability are critical.

FAQ

What is the maximum continuous power dissipation for DDZ3V0BSF-7 on standard FR-4?

The DDZ3V0BSF-7 is rated for 500 mW continuous power dissipation when mounted on FR-4 PCB with a 10 mm × 10 mm copper pad and board dimensions of 35 mm × 25 mm. Derating begins linearly above +25°C ambient, reaching zero power at +150°C per the published derating curve (Fig. 1).

Does DDZ3V0BSF-7 meet AEC-Q200 stress testing requirements?

DDZ3V0BSF-7 is not individually qualified to AEC-Q200. However, Diodes Incorporated manufactures it in IATF 16949 certified facilities and supports PPAP documentation upon request for automotive programs - qualification requires customer-specific testing per AEC-Q200 Rev. D.

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. This band aligns with the cathode terminal, which must connect to the higher-potential node (e.g., regulated voltage rail) during Zener operation - consistent with standard diode marking convention.

Can DDZ3V0BSF-7 replace DDZ3V0ASF-7 in existing designs?

Yes - DDZ3V0BSF-7 replaces DDZ3V0ASF-7 with improved voltage tolerance (±3.4% vs. ±4.0%) and identical SOD323F package, pinout, and thermal characteristics. The tighter spec enhances reference stability without layout or firmware changes, and both share the same tape-and-reel packing (3,000 pcs/reel).