Diodes Incorporated DZ23C33-7-F

Overview

DZ23C33-7-F from Diodes Incorporated is a dual common-cathode 33 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with ±5% matching between zener voltages and 80 Ω typical zener impedance at 5 mA. It provides precision voltage reference and overvoltage protection in compact dual-diode configuration for space-constrained power rail monitoring circuits.

For engineers reviewing the DZ23C33-7-F datasheet, DZ23C33-7-F pinout, DZ23C33-7-F application, or DZ23C33-7-F equivalent, this part supports dual-rail voltage clamping, matched reference generation, and low-profile ESD-tolerant biasing where tight V_Z tracking and thermal stability are required.

Technical Context

This dual Zener operates in common-cathode topology, enabling independent anode connections for two 33 V (31–35 V) breakdown paths sharing one cathode terminal. Each diode is characterized at I_ZT = 5.0 mA with TC = +0.090 %/°C and minimum reverse voltage V_R = 25.0 V at I_R = 0.1 µA.

Thermal resistance R_θJA is 417 °C/W on FR4 board with recommended pad layout; derating begins above 50 °C ambient. The device meets JEDEC high-reliability standards and is fully RoHS-compliant, halogen- and antimony-free.

Key Specifications

Pinout & Package

Package: SOT23 - 3-terminal plastic molded case, 0.008 g weight, UL 94V-0 rating, 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-C33,113 and DZ23C33-7, the DZ23C33-7-F delivers integrated dual-Zener functionality with guaranteed matching and full RoHS compliance-critical for compact, high-reliability, and environmentally regulated designs.

Availability

DZ23C33-7-F is available at Aetrix Electronics and suitable for industrial power monitoring, automotive body electronics, test equipment calibration, and medical sensor biasing requiring stable component supply and JEDEC-qualified reliability.

Supply support for DZ23C33-7-F 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-performance, high-reliability components for industrial, computing, consumer, and automotive markets.

The DZ23 series targets space-efficient, matched dual-Zener applications in power management and voltage reference systems-designed specifically for automated assembly and thermally stable operation in harsh environments.

FAQ

What is the maximum continuous current each Zener can handle at 25°C?

At T_A = 25°C, the total 300 mW power rating is shared between both diodes. With V_Z ≈ 33 V, maximum continuous current per diode is ~4.5 mA (300 mW ÷ 2 ÷ 33 V), assuming equal power split. Derating applies above 50°C ambient per Fig. 1.

Is DZ23C33-7-F qualified for automotive use?

No-DZ23C33-7-F is commercial-grade. For automotive applications, Diodes offers the Q-suffix variant DZ23C33Q-7-F, which is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949 certified facilities.

How is polarity identified on the SOT23 package?

Polarity is marked by a single bar on the top surface indicating Pin 1 (Anode 1). Pin 2 (Cathode) is center, Pin 3 (Anode 2) is rightmost-per standard SOT23 pinout and device schematic in DS18002 Rev. 22-2, page 2.

Does this device have specified capacitance or leakage at 33 V?

No specific capacitance value is given for DZ23C33-7-F in the datasheet. Reverse leakage is implied by V_R = 25.0 V @ I_R = 0.1 µA, meaning leakage remains ≤ 0.1 µA up to 25 V; at 33 V, it exceeds breakdown and enters conduction.