Diodes Incorporated DZ23C39-7-F

Overview

DZ23C39-7-F from Diodes Incorporated is a 300mW dual Zener diode in common-cathode SOT23 package, with nominal zener voltage 39V (37–41V range), ±5% matching between diodes, and temperature coefficient +0.110%/°C. It provides precision voltage reference and overvoltage clamping in space-constrained dual-rail power monitoring circuits.

For engineers reviewing the DZ23C39-7-F datasheet, DZ23C39-7-F pinout, DZ23C39-7-F application, or DZ23C39-7-F equivalent, key selection criteria include matched dual-zener tolerance, thermal resistance (417°C/W), reverse leakage (<0.1µA at 29V), zener impedance (90Ω @ 5mA), and JEDEC-qualified reliability for industrial power management designs.

Technical Context

This dual common-cathode Zener operates with two independent 39V breakdown junctions sharing one cathode terminal, enabling symmetrical voltage referencing or bidirectional transient suppression in low-power analog signal chains. Its matched V_Z deviation ≤5% supports differential reference stability without external trimming.

The device uses silicon planar epitaxial construction with matte tin-plated alloy 42 leads, rated for -65°C to +150°C operation and qualified to JEDEC high-reliability standards. Thermal derating begins at 40°C ambient, maintaining 300mW dissipation only below that threshold on FR4 PCB with recommended pad layout.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic case, 3-terminal, 0.008 g weight, UL 94V-0 rated molding compound, 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 BZX384-C39 and DZ23C36-7-F, DZ23C39-7-F uniquely delivers guaranteed 39V dual-junction matching in one SOT23 footprint-enabling compact, calibrated dual-rail monitoring without external trimming or layout duplication.

Availability

DZ23C39-7-F is available at Aetrix Electronics and suitable for industrial power supervision, low-power analog reference, automotive body control clamping, and test equipment protection requiring stable component supply and JEDEC-qualified reliability.

Supply support for DZ23C39-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The DZ23 series targets cost-sensitive, space-constrained applications needing matched dual-Zener performance-designed specifically for industrial power monitoring, analog reference, and automotive clamping where SOT23 integration and parametric consistency are critical.

FAQ

What is the maximum continuous power dissipation for DZ23C39-7-F?

The absolute maximum continuous power dissipation is 300 mW at TA = 25°C on FR4 PCB with Diodes' recommended pad layout. Derating begins linearly above 40°C ambient, reaching zero dissipation at 150°C. This limit assumes proper thermal land pattern per package outline DS18002 Rev. 22-2 page 6.

How is the common-cathode configuration used in circuit design?

In common-cathode configuration, Pin 2 (cathode) connects to the reference potential (e.g., ground or regulated rail), while Pins 1 and 3 serve as independent anodes. This allows simultaneous clamping of two signals to the same reference or creation of a differential reference pair with matched breakdown voltages.

Does DZ23C39-7-F meet automotive qualification requirements?

The base part DZ23C39-7-F is commercial-grade. For automotive use, Diodes offers the Q-suffix variant DZ23C39Q-7-F, qualified to AEC-Q101, PPAP-capable, and manufactured in IATF 16949-certified facilities. The commercial version is not approved for automotive safety-critical functions.

What is the significance of the +0.110%/°C temperature coefficient?

The +0.110%/°C coefficient means the zener voltage increases by 0.110% per degree Celsius rise in junction temperature. For a 39V nominal device, this equates to +42.9 mV/°C drift-critical for high-accuracy references where ambient or self-heating effects must be modeled or compensated.