Diodes Incorporated DDZ4V7CSF-7

Overview

DDZ4V7CSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 4.68–4.93 V at 20 mA test current, ±2% tolerance, 130 Ω dynamic impedance at 1 kHz, and 10 µA reverse leakage at 3.75 V. It operates across –65°C to +150°C and is used for voltage regulation and reference in low-power analog sensor interfaces and power supply feedback loops.

For engineers reviewing the DDZ4V7CSF-7 datasheet, DDZ4V7CSF-7 pinout, DDZ4V7CSF-7 application, or DDZ4V7CSF-7 equivalent, this part serves as a stable, RoHS-compliant, SOD323F-packaged Zener for precision biasing, overvoltage clamping, and reference generation where tight V_Z tolerance and low thermal drift are required.

Technical Context

This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its zener voltage is specified at I_ZT = 20 mA with measurement completed within 40 ms to minimize self-heating effects, and it exhibits a typical temperature coefficient near +2.5 mV/°C in the 4.7 V range per Figure 3.

The SOD323F package enables automated placement and reflow compatibility, with thermal resistance R_θJA = 250°C/W on FR-4 PCB (10 mm × 10 mm pad), supporting continuous operation up to 500 mW at T_A ≤ 25°C and derated linearly above that per Figure 1.

Key Specifications

Pinout & Package

Package: SOD323F - molded plastic, cathode-banded, matte tin-plated copper alloy leadframe, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V7LT1G and MMSZ4702T1G, DDZ4V7CSF-7 delivers tighter ±2% V_Z tolerance and identical 500 mW rating in a smaller SOD323F package-enabling higher accuracy in space-constrained voltage reference and regulation circuits without sacrificing thermal performance.

Availability

DDZ4V7CSF-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C power delivery feedback, automotive cabin control panels, and IoT edge node power supervision requiring stable component supply and long-term manufacturability.

Supply support for DDZ4V7CSF-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 ICs, specializing in high-reliability, application-optimized components for industrial, automotive, and consumer markets.

This part belongs to Diodes' DDZxx(x)SF precision Zener family, designed specifically for high-accuracy voltage reference and regulation in space-constrained, thermally demanding applications where tight tolerance and low leakage are critical.

FAQ

What is the maximum continuous power dissipation for DDZ4V7CSF-7 on a standard PCB?

DDZ4V7CSF-7 is rated for 500 mW maximum power dissipation when mounted on an 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 per the curve in Figure 1 of DS31987 Rev. 23–2, reaching zero power at +150°C ambient.

Does DDZ4V7CSF-7 meet automotive qualification standards?

DDZ4V7CSF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes Incorporated offers AEC-Q101-qualified variants (e.g., DDZ4V7CSFQ-7) for automotive applications requiring formal stress testing and change control-contact Diodes or Aetrix for qualification status and PPAP packages.

How is the zener voltage measured to achieve ±2% tolerance?

Zener voltage is measured within 40 ms of power application using short-duration pulse testing to minimize self-heating effects, per Note 6 in DS31987. This method ensures V_Z reflects true device behavior under transient conditions and avoids thermal drift-induced measurement error, enabling the tight ±2% specification across the 4.68–4.93 V range.

Can DDZ4V7CSF-7 be used in place of older DDZ4V7ASF or DDZ4V7BSF parts?

Yes-DDZ4V7CSF-7 replaces earlier ASF and BSF variants with identical electrical specs but improved process control yielding tighter ±2% V_Z tolerance (vs. ±3% for BSF and ±5% for ASF). The SOD323F package, marking code "YL", and tape-and-reel packaging (3,000 pcs/reel) are fully compatible, making it a direct drop-in upgrade for legacy designs.