Diodes Incorporated AZ23C9V1-7-F

Overview

AZ23C9V1-7-F from Diodes Incorporated is a dual common-anode 300 mW surface-mount Zener diode with nominal Zener voltage 9.1 V (8.5–9.6 V range), 10 Ω max Zener impedance at 5 mA, +0.065 %/°C temperature coefficient, and 7.0 V minimum reverse voltage at 0.1 µA leakage. It serves as precision voltage reference and overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the AZ23C9V1-7-F datasheet, AZ23C9V1-7-F pinout, AZ23C9V1-7-F application, or AZ23C9V1-7-F equivalent, this page delivers verified electrical parameters, SOT23 package layout, dual-Zener functional context, thermal derating behavior, and direct alternatives for voltage reference and clamping designs requiring tight V_Z matching and low TC.

Technical Context

This dual-Zener device integrates two identical Zener elements sharing a common anode terminal, enabling bidirectional clamping or dual-rail reference generation in compact space-constrained layouts. Its common-anode topology supports symmetrical voltage limiting across positive/negative signal excursions when paired with external biasing.

The device operates within –65 °C to +150 °C ambient range, with thermal resistance R_θJA = 417 °C/W on FR-4 board, and exhibits stable breakdown down to 1.0 mA knee current (Z_ZK = 50 Ω). Its ±5% V_Z matching between diodes ensures balanced performance in differential sensing paths.

Key Specifications

Pinout & Package

Package: SOT23 - 3-pin surface-mount plastic package with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 rated molding compound, and 0.008 g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C9V1,113 and DZ23C9V1-7-F, AZ23C9V1-7-F uniquely delivers matched dual-Zener performance in SOT23 with common-anode topology-enabling compact, thermally symmetric clamping essential for precision analog and automotive signal integrity.

Availability

AZ23C9V1-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, medical analog front-ends, and energy meter reference circuits requiring stable component supply, JEDEC-Q101 qualification, and RoHS-compliant packaging.

Supply support for AZ23C9V1-7-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 integrated circuits, specializing in high-performance, high-reliability components for industrial, automotive, computing, and consumer markets.

AZ23C9V1-7-F belongs to the AZ23C series of dual Zener diodes designed specifically for space-efficient voltage regulation and bidirectional transient suppression in automated SMT production environments.

FAQ

What is the maximum continuous Zener current for AZ23C9V1-7-F at 25°C?

The maximum continuous Zener current is derived from P_D = 300 mW and V_Z ≈ 9.1 V, yielding I_Z(max) ≈ 33 mA. However, thermal derating applies above 25°C: at 85°C ambient, allowable power drops to ~150 mW, limiting I_Z to ~16.5 mA. Operation must stay within the safe operating area defined by Fig. 1 in DS18003 Rev. 18-2.

Can AZ23C9V1-7-F be used for ESD protection in USB 2.0 data lines?

No - AZ23C9V1-7-F is not optimized for high-speed ESD clamping. Its capacitance is unspecified in the datasheet, and its 10 Ω Z_ZT and 9.1 V V_Z exceed USB 2.0 signal swing (0–3.6 V). Dedicated low-capacitance TVS arrays like D3V3F4U2UP-7 are recommended for data-line ESD compliance per IEC 61000-4-2 Level 4.

Is there a qualified automotive-grade version of AZ23C9V1-7-F?

Yes - the automotive-qualified variant is AZ23C9V1Q-7-F. It shares identical electrical characteristics but is manufactured in IATF 16949-certified facilities, qualified to AEC-Q101, and supported with PPAP documentation. The "Q" suffix denotes full automotive change control and traceability per Diodes' automotive product roadmap.

How does the common-anode configuration affect PCB layout compared to discrete Zeners?

The common-anode configuration reduces net count by one and eliminates mismatch from separate device placement. Pin 1 (anode) routes directly to ground or reference plane, while Pins 2 and 3 route independently to protected nodes. This simplifies thermal symmetry, minimizes parasitic inductance in clamping paths, and avoids layout-induced V_Z skew seen with discrete pairs placed >1 mm apart.