Diodes Incorporated DZ23C43-7

Overview

DZ23C43-7 from Diodes Incorporated is a dual common-cathode 300mW surface-mount Zener diode with nominal zener voltage 43V (40–46V range), maximum zener impedance 100Ω at 5mA, temperature coefficient +0.110%/°C, and reverse leakage ≤0.1µA at 32V - used for precision voltage reference and overvoltage clamping in power supply feedback loops.

For engineers reviewing the DZ23C43-7 datasheet, DZ23C43-7 pinout, DZ23C43-7 application, or DZ23C43-7 equivalent, key selection criteria include matched dual-zener tracking (≤5% ΔV_Z), SOT23 package compatibility with automated assembly, thermal resistance of 417°C/W on FR4, and JEDEC-qualified reliability for industrial power management designs.

Technical Context

This dual-Zener device integrates two independent zener elements sharing a common cathode terminal, enabling symmetrical voltage referencing or bidirectional clamping configurations. Its matched V_Z tolerance (≤5% difference between diodes) supports differential sensing and rail-to-rail clamp circuits without external trimming.

The device operates across –65°C to +150°C, with power derating beginning above 50°C ambient, and exhibits predictable positive temperature coefficient behavior (+0.110%/°C) above 30V - critical for stable regulation in wide-temperature industrial environments.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic case with matte tin-plated alloy-42 leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈0.008g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C43 and DZ23C47-7, DZ23C43-7 uniquely delivers matched dual-zener functionality in SOT23, enabling space-constrained dual-reference or symmetrical clamp designs without performance trade-offs in tracking or thermal response.

Availability

DZ23C43-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, programmable logic controller I/O protection, and test equipment voltage references requiring stable component supply and JEDEC-qualified reliability.

Supply support for DZ23C43-7 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 industrial, computing, and consumer markets.

The DZ23 series targets cost-sensitive, space-constrained applications needing dual-zener functionality - designed specifically for automated SMT assembly and stable voltage referencing in power management and protection circuits.

FAQ

What is the maximum continuous reverse current this device can handle at 43V?

At 43V, the device operates within its specified zener region; maximum continuous current is limited by power dissipation. With 300mW rating and V_Z ≈43V, absolute max DC current is ~7mA - but derating applies above 50°C ambient per Fig.1. Pulse operation permits higher peak currents if duty cycle and thermal mass allow.

Can DZ23C43-7 be used as a single-ended 43V reference instead of dual-ended?

Yes - Pin 1 and Pin 2 form one functional Zener (Anode 1 → Cathode), while Pin 3 and Pin 2 form the second. Either pair may be used independently; unused anode must be left open or tied to cathode via high-value resistor to avoid unintended conduction paths.

Is the 5% ΔV_Z matching guaranteed across temperature or only at 25°C?

The ≤5% ΔV_Z specification applies at T_A = +25°C per the datasheet's Electrical Characteristics table. While both diodes track similarly over temperature due to monolithic construction, the matching tolerance is not guaranteed across the full –65°C to +150°C range - design margins should account for individual tempco effects.

Does this part meet automotive qualification requirements out-of-the-box?

No - DZ23C43-7 is commercial-grade. Automotive-qualified equivalents carry "Q" suffixes (e.g., DZ23C43Q-7-F) and require PPAP documentation, AEC-Q101 stress testing, and IATF 16949 manufacturing certification - available separately through Diodes' automotive product portal.