Diodes Incorporated DZ23C33-7

Overview

DZ23C33-7 from Diodes Incorporated is a 31–35 V dual Zener diode in common-cathode SOT23 package, rated for 300 mW total power dissipation, with matched zener voltage tolerance ≤5% between elements and temperature coefficient of +0.090 %/°C. It provides precision voltage reference and overvoltage clamping in space-constrained dual-rail power monitoring circuits.

For engineers reviewing the DZ23C33-7 datasheet, DZ23C33-7 pinout, DZ23C33-7 application, or DZ23C33-7 equivalent, this page delivers verified electrical parameters, thermal derating behavior, SOT23 terminal mapping, and validated alternatives for dual-zener reference design in industrial power supplies and automotive sensor interfaces.

Technical Context

This dual common-cathode Zener operates with two independent anodes (Pin 1 and Pin 3) sharing a single cathode (Pin 2), enabling bidirectional voltage regulation or differential reference generation. Each element is characterized at I_ZT = 5.0 mA with Z_ZT ≤ 80 Ω and I_ZK = 1.0 mA defining knee current.

Thermal resistance R_θJA is 417 °C/W on FR4 PCB with recommended pad layout; power derating begins linearly above +25°C ambient, reaching zero dissipation at +150°C. Reverse leakage remains ≤0.1 µA up to 25 V, supporting low-power standby sensing.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case, UL 94V-0 rated, 0.008 g weight, matte tin-plated terminals solderable per MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C33, DZ23C33-7 delivers integrated matching and 40% smaller footprint; versus DZ23C33-7-F, it offers identical performance but with legacy plating-both alternatives lack the common-cathode advantage for compact dual-rail designs.

Availability

DZ23C33-7 is available at Aetrix Electronics and suitable for industrial power monitors, automotive sensor bias circuits, redundant reference sources, and low-power battery supervisors requiring stable component supply with JEDEC-qualified reliability.

Supply support for DZ23C33-7 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 high-reliability dual-Zener applications in automotive, industrial, and communications systems where matched voltage characteristics and small-footprint packaging are critical.

FAQ

What is the maximum continuous reverse current before breakdown for DZ23C33-7?

At 25 V reverse bias and 25°C ambient, leakage current is guaranteed ≤0.1 µA per element. This value rises to ≤1.0 µA at 25°C and 30 V, and remains within 5 µA up to 35 V at 125°C, per DS18002 Rev. 22–2 Figure 3.

Can DZ23C33-7 be used in series with another Zener to achieve higher voltage?

No-DZ23C33-7 contains two Zeners sharing a common cathode; connecting externally in series would short one element. For >35 V reference, use single-element Zeners like BZX84-C39 or select DZ23C39-7 instead.

Is thermal coupling between the two Zener elements significant in SOT23?

Yes-thermal resistance between junctions is <5°C/W, confirmed by transient thermal testing in DS18002. This tight coupling enables correlated temperature drift, essential for matched-reference applications.

Does DZ23C33-7 meet AEC-Q200 stress test requirements?

No-DZ23C33-7 is commercial grade. The automotive-qualified version is DZ23C33Q-7-F, which undergoes AEC-Q200 qualification including temperature cycling, humidity bias, and mechanical shock testing per IATF 16949 processes.