Diodes Incorporated DZ23C3V3-7

Overview

DZ23C3V3-7 from Diodes Incorporated is a dual common-cathode 3.3 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with ±5% matching between zener voltages and typical temperature coefficient of –0.055 %/°C. It provides precision voltage reference and overvoltage clamping in space-constrained dual-rail biasing circuits.

For engineers reviewing the DZ23C3V3-7 datasheet, DZ23C3V3-7 pinout, DZ23C3V3-7 application, or DZ23C3V3-7 equivalent, this device supports matched dual-voltage regulation in analog sensor interfaces, low-power microcontroller reset supervision, and rail-to-rail voltage monitoring where tight V_Z tracking and thermal stability are required.

Technical Context

This dual Zener operates with both anodes independently connected and cathodes tied together - enabling simultaneous regulation of two separate 3.3 V rails or differential reference generation. Each diode is characterized at I_ZT = 5.0 mA with V_Z = 3.1–3.5 V and Z_ZT = 95 Ω.

Thermal resistance is 417 °C/W (junction-to-ambient, FR4 board), and it supports operation from –65 °C to +150 °C. The device exhibits a negative temperature coefficient (–0.055 %/°C), ensuring predictable drift under thermal variation in compact PCB layouts.

Key Specifications

Pinout & Package

Package: SOT23 - three-terminal plastic-molded case with matte tin-plated alloy 42 leads, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C3V3 and DZ23C3V3-7-F, the DZ23C3V3-7 offers integrated dual-Zener functionality in SOT23 with guaranteed ≤5% matching - reducing BOM count and layout complexity, while the "-F" variant adds certified green material compliance without altering electrical behavior.

Availability

DZ23C3V3-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller reset supervision, and USB-C power negotiation requiring stable component supply and JEDEC-reliable performance.

Supply support for DZ23C3V3-7 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, manufacturing, and sales operations across Asia, Europe, and the Americas.

The DZ23 series targets space-constrained dual-voltage reference needs in industrial, computing, and automotive electronics - emphasizing matched Zener performance, thermal stability, and high-reliability packaging in SOT23.

FAQ

What is the maximum continuous Zener current for each element in DZ23C3V3-7?

At 25 °C ambient and with recommended FR4 pad layout, the 300 mW total power rating allows up to ~45.5 mA per Zener at 3.3 V before reaching thermal limit. Derating begins above 25 °C per the 417 °C/W R_θJA curve - at 70 °C ambient, max per-Zener current drops to ~32 mA.

Can DZ23C3V3-7 be used as a single Zener by leaving one anode unconnected?

Yes - Pin 1 or Pin 3 may be left floating or grounded without affecting the other Zener's regulation. However, unused anode must not be biased positively relative to cathode, as that would forward-bias the junction and cause leakage. Thermal performance remains unchanged since power dissipation is shared across the same die.

Is DZ23C3V3-7 qualified for automotive applications?

The base DZ23C3V3-7 is commercial-grade. For automotive use, Diodes offers the Q-suffix variant (e.g., DZ23C3V3Q-7-F), qualified to AEC-Q200, manufactured in IATF 16949 facilities, and PPAP-capable - available separately with full change control and qualification documentation.

How does the –0.055 %/°C temperature coefficient impact circuit accuracy over temperature?

Over a 100 °C range (–40 °C to +60 °C), V_Z shifts by approximately –55 mV (–0.055 %/°C × 3.3 V × 100 °C). This predictable negative drift can be compensated in analog designs using complementary TC components or calibrated software offsets - unlike uncharacterized drift in non-TC Zeners.