Diodes Incorporated DZ23C20-7-F

Overview

DZ23C20-7-F from Diodes Incorporated is a dual common-cathode 20 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with matched zener voltage tolerance ≤5% between elements and ±0.09%/°C temperature coefficient. It provides precision voltage reference and overvoltage clamping in space-constrained dual-rail power monitoring circuits.

For engineers reviewing the DZ23C20-7-F datasheet, DZ23C20-7-F pinout, DZ23C20-7-F application, or DZ23C20-7-F equivalent, this device serves as a compact, RoHS-compliant dual-zener solution for bidirectional voltage regulation, rail-to-rail clamping, and matched reference generation in industrial sensor signal conditioning and automotive body control modules.

Technical Context

This dual zener operates in common-cathode configuration, enabling independent anode connections for asymmetric clamping or differential reference use. Each element exhibits 18.8–21.2 V nominal zener voltage at 5 mA test current, with typical zener impedance of 50 Ω at I_ZT and 220 Ω at I_ZK.

Thermal resistance is 417 °C/W (junction-to-ambient, FR4 board), supporting operation from –65 °C to +150 °C. The device uses matte tin-plated alloy 42 lead frame and green molding compound compliant with UL 94V-0 and J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case, 0.008 g weight, UL 94V-0 rated, JEDEC-compliant outline with 0.95 mm max height and 2.9 mm × 2.4 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C20,113 and DZ23C22-7-F, DZ23C20-7-F uniquely delivers matched dual 20 V regulation in a single SOT23 footprint-reducing PCB area by 60% versus dual DO-35s and offering tighter voltage tracking than discrete alternatives.

Availability

DZ23C20-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, USB-C power delivery protection, and programmable logic controller input stages requiring stable component supply and long-term lifecycle support.

Supply support for DZ23C20-7-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

DZ23C20-7-F belongs to the DZ23C series of dual common-cathode Zener diodes engineered for high-reliability voltage reference and clamping in space-constrained industrial and automotive applications.

FAQ

What is the maximum continuous zener current per element at 25°C?

At 25°C ambient and with proper PCB thermal relief, each zener element supports up to 15 mA continuous current before exceeding its 300 mW total package power limit-calculated as 300 mW ÷ 20 V ≈ 15 mA. Derating is required above 25°C per the 417 °C/W thermal resistance curve.

Can DZ23C20-7-F be used for reverse-polarity protection?

No-it lacks integrated series blocking elements. However, its common-cathode structure allows Anode 2 to clamp negative transients to ground when Anode 1 is tied to a positive rail, providing limited reverse-voltage suppression up to –20 V, provided current is externally limited to <1 mA.

Is there a recommended pad layout for SOT23 reflow soldering?

Yes-Diodes specifies a 2.0 mm × 0.8 mm copper pad with 1.35 mm X1 offset and 0.9 mm Y dimension. This layout optimizes thermal transfer and minimizes tombstoning. Full dimensions are published in Diodes' SOT23 package outline document (PN: SOT23-3-1).

Does DZ23C20-7-F meet AEC-Q200 requirements?

The commercial-grade DZ23C20-7-F is qualified to JEDEC standards referenced in AEC-Q200 but is not AEC-Q200 certified. For automotive applications, the Q-suffix variant DZ23C20Q-7-F is required-it undergoes full PPAP, temperature cycling, and humidity testing per AEC-Q200 Rev D.