Diodes Incorporated DZ23C47-7

Overview

DZ23C47-7 from Diodes Incorporated is a dual common-cathode 300mW surface-mount Zener diode with nominal zener voltage 47V (44–50V range), maximum zener impedance 100Ω at 5mA, and temperature coefficient +0.110%/°C. It provides precision voltage reference and overvoltage clamping in compact SOT23 package for power supply regulation and signal conditioning circuits.

For engineers reviewing the DZ23C47-7 datasheet, DZ23C47-7 pinout, DZ23C47-7 application, or DZ23C47-7 equivalent, key selection criteria include dual-zener matching (ΔV_Z ≤ 5%), low thermal resistance (417°C/W), JEDEC-qualified reliability, and RoHS-compliant lead-free construction suitable for automated assembly.

Technical Context

This dual Zener operates in common-cathode configuration, enabling independent voltage regulation or differential reference generation from a single package. Each anode is electrically isolated, supporting two distinct breakdown paths sharing one cathode terminal.

It delivers stable 47V regulation at I_ZT = 5mA with typical zener impedance of 100Ω and reverse leakage <0.1µA at 35V. Its +0.110%/°C temperature coefficient ensures predictable drift across –65°C to +150°C operating range.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic package (2.9mm × 2.4mm × 1.1mm), UL 94V-0 rated, moisture sensitivity level 1, matte tin-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C47 and DZ23C47-7-F, the DZ23C47-7 offers integrated dual-Zener matching in SMT form factor-reducing PCB area by ~60% versus dual DO-35 placement and eliminating inter-device V_Z mismatch in critical reference designs.

Availability

DZ23C47-7 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive ECU reference design, and telecom surge protection requiring stable component supply and JEDEC-qualified reliability.

Supply support for DZ23C47-7 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 voltage reference and protection applications in space-constrained industrial, automotive, and telecom systems where dual-element matching and SMT compatibility are essential.

FAQ

What is the maximum continuous reverse current the DZ23C47-7 can handle at 47V?

At 47V, the device's 300mW power rating limits continuous reverse current to approximately 6.4mA (P = V × I → I = 300mW / 47V). Exceeding this risks thermal runaway; derating per Fig. 1 is required above 50°C ambient.

Can DZ23C47-7 be used in series or parallel configurations?

Yes - its common-cathode structure supports series connection of anodes for higher effective breakdown voltage, or parallel use of both Zeners (with current-sharing resistors) to improve power handling. Pin 2 must remain the shared return node in all configurations.

Is DZ23C47-7 qualified for automotive applications?

The base DZ23C47-7 is commercial-grade; automotive-qualified equivalents exist as DZ23C47Q-7-F (AEC-Q101 qualified, PPAP-capable, manufactured in IATF 16949 facilities), listed on Diodes' automotive products page.

How does the +0.110%/°C temperature coefficient affect circuit accuracy?

Over a 100°C range (e.g., –25°C to +75°C), V_Z shifts by ~11.5V (47V × 0.0011 × 100), or ±5.75V. This must be accounted for in precision references via compensation networks or calibration; it is acceptable for clamping where absolute accuracy is secondary to threshold consistency.