Diodes Incorporated DDZX7V5C-7

Overview

DDZX7V5C-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 7.5 V (min 7.29 V, max 7.67 V), 300 mW power dissipation on FR-4 PCB, and tight 5% tolerance at I_ZT = 20 mA. It delivers low dynamic impedance (6 Ω at 20 mA), ultra-low reverse leakage (0.5 μA at 6.0 V), and AEC-Q101 qualification for automotive-grade reliability in voltage reference and regulation circuits.

For engineers reviewing the DDZX7V5C-7 datasheet, DDZX7V5C-7 pinout, DDZX7V5C-7 application, or DDZX7V5C-7 equivalent, this part is selected for stable low-voltage reference design, ESD-protected analog sensing nodes, and compact power rail clamping where SOT23 footprint, thermal performance, and ±2% typical V_Z accuracy are critical.

Technical Context

This Zener operates in reverse breakdown mode with sharp knee characteristics and minimal temperature drift-its TC_VZ is approximately +0.04%/°C near 7.5 V, enabling stable reference generation across -65°C to +150°C ambient range. It uses alloy-42 leadframe with matte tin annealing for robust solderability and RoHS/Green compliance.

The device is rated for 300 mW dissipation on standard FR-4 PCB with recommended pad layout, derating linearly above +25°C per Fig. 1 (R_θJA = 417°C/W). Its low capacitance (~15 pF at V_R = 2 V) supports high-frequency noise suppression without signal distortion.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic case with 3-terminal configuration, UL 94V-0 rating, and 0.008 g mass. Moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C7V5 and MMSZ5235B, DDZX7V5C-7 uniquely balances AEC-Q101 reliability, SOT23 miniaturization, and 6 Ω low-impedance regulation-making it optimal for space-constrained, high-stability automotive and industrial reference designs.

Availability

DDZX7V5C-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 4–20 mA transmitters, and portable medical sensor systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DDZX7V5C-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 automotive, industrial, and computing markets.

DDZX7V5C-7 belongs to the DDZX series of precision Zener diodes engineered for stable voltage reference and regulation in harsh-environment applications demanding AEC-Q101 qualification and tight parametric control.

FAQ

What is the maximum reverse voltage (V_R) before significant leakage occurs in DDZX7V5C-7?

At V_R = 6.0 V, reverse leakage is specified at 0.5 μA maximum. Leakage rises sharply beyond this point-by 5 μA at V_R = 7.0 V and exceeds 100 μA near 7.29 V, confirming onset of breakdown. Operation below 6.0 V ensures negligible current draw in standby.

Can DDZX7V5C-7 be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficient mismatch; paralleling causes current hogging and thermal runaway. For >300 mW needs, use a single higher-rated device (e.g., MMSZ5235B) or add external series resistance to balance current sharing.

Is the SOT23 pinout compatible with JEDEC TO-236AB standard?

Yes-DDZX7V5C-7 follows JEDEC TO-236AB pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC. This matches industry-standard SOT23 layouts used by Diodes Inc., ON Semiconductor, and Vishay, enabling direct PCB footprint reuse.

Does DDZX7V5C-7 require derating at elevated ambient temperatures?

Yes-per Fig. 1, power must be linearly derated above +25°C: at +85°C ambient, max dissipation drops to 180 mW (60% of 300 mW). Derating ensures junction temperature remains within -65°C to +150°C limit under worst-case convection conditions.