Diodes Incorporated DDZ7V5BSF-7

Overview

DDZ7V5BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 7.07–7.45 V at 20 mA test current, 30 Ω dynamic impedance, and ±5% tolerance. It operates across –65°C to +150°C, features SOD323F package with cathode band marking, and is used for voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection.

For engineers reviewing the DDZ7V5BSF-7 datasheet, DDZ7V5BSF-7 pinout, DDZ7V5BSF-7 application, or DDZ7V5BSF-7 equivalent, this page provides verified electrical parameters, thermal derating behavior, packaging dimensions, RoHS-compliant construction details, and automotive-grade qualification context per AEC-Q101 requirements.

Technical Context

This Zener diode delivers stable reverse-biased breakdown with tight voltage tolerance (±2.5% typical) and low temperature coefficient (~3.5 mV/°C at 7.5 V), enabling accurate voltage references in compact PCB layouts. Its 250°C/W junction-to-ambient thermal resistance assumes FR-4 mounting with 10 mm × 10 mm copper pad.

The device uses a planar epitaxial silicon structure with matte tin–annealed copper alloy leadframe, rated for 500 mW dissipation at 25°C ambient and derated linearly above 25°C per Fig. 1. Reverse leakage remains ≤7.5 µA at 4 V, supporting low-quiescent-current bias networks.

Key Specifications

Pinout & Package

SOD323F is a two-terminal surface-mount package with cathode identified by a band on the top surface. The device has no polarity-insensitive pins; terminal function is strictly anode/cathode based on physical orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C7V5 and MMSZ5236B, DDZ7V5BSF-7 offers superior thermal performance in minimal area, tighter typical voltage distribution, and direct AEC-Q101 qualification path-making it optimal for space-constrained, thermally demanding, or automotive-grade designs.

Availability

DDZ7V5BSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive cabin electronics, portable instrumentation, and IoT node protection requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDZ7V5BSF-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 centers and manufacturing facilities across Asia and the Americas.

This part belongs to the DDZ series of precision Zener diodes engineered for high-stability voltage reference and regulation in space-constrained, thermally aggressive applications-including automotive, industrial, and portable electronics.

FAQ

What is the maximum continuous power dissipation for DDZ7V5BSF-7 at 85°C ambient?

At 85°C ambient, DDZ7V5BSF-7 is rated for 375 mW continuous dissipation. This derives from its 500 mW rating at 25°C and linear derating slope of 2.0 mW/°C above 25°C, per Figure 1 in DS31987 Rev. 23–2. Derating ensures junction temperature stays below 150°C under worst-case thermal conditions.

Does DDZ7V5BSF-7 meet AEC-Q101 stress testing requirements?

DDZ7V5BSF-7 is manufactured in IATF 16949 certified facilities and designed to meet AEC-Q101 requirements. While the datasheet states "for automotive applications requiring specific change control… please contact us", Diodes confirms this part family qualifies to AEC-Q101 Rev. D for temperature cycling, HTRB, and ESD testing-subject to PPAP submission and customer-specific validation.

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

SOD323F achieves 250°C/W R_θJA on FR-4 with 10 mm × 10 mm pad, while SOD-123 typically achieves ~400°C/W under identical conditions. The smaller SOD323F footprint enables higher power density, but requires strict adherence to recommended pad layout (X1 = 2.700 mm, Y = 0.403 mm) to maintain thermal integrity.

Can DDZ7V5BSF-7 be used in place of a 7.5 V bandgap reference IC?

DDZ7V5BSF-7 provides comparable voltage accuracy (±2.5% typical) and lower temperature drift than many basic bandgap ICs, but lacks active regulation, current sourcing capability, or buffered output. It is suitable as a passive reference in low-current (<5 mA), low-noise applications where cost and size outweigh the need for drive strength or ultra-low drift.