Diodes Incorporated AZ23C27-7-F

Overview

AZ23C27-7-F from Diodes Incorporated is a dual common-anode 300 mW surface-mount Zener diode with nominal zener voltage 27 V (25.1–28.9 V range), 80 Ω maximum zener impedance at 5 mA, +0.090 %/°C temperature coefficient, and 20 V minimum reverse voltage - used for precision voltage reference and overvoltage protection in power supply feedback loops.

For engineers reviewing the AZ23C27-7-F datasheet, AZ23C27-7-F pinout, AZ23C27-7-F application, or AZ23C27-7-F equivalent, key selection criteria include dual-zener matching (≤5% ΔV_Z), SOT23 package thermal resistance (417 °C/W), JEDEC-qualified reliability, AEC-Q101 ESD rating (HBM 8 kV), and RoHS-compliant lead-free construction.

Technical Context

This dual Zener operates in common-anode configuration: both cathodes are electrically isolated, enabling independent regulation or bidirectional clamping when paired with external circuitry. Its matched breakdown voltages support differential reference generation and symmetrical voltage limiting.

Thermal derating begins above 25 °C ambient, with full 300 mW dissipation only at T_A ≤ 75 °C per the power derating curve. The device exhibits low capacitance (<10 pF at V_R = 1 V) and stable TC across its operating range (−65 to +150 °C).

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic, green compound (UL 94V-0), matte tin-plated terminals, 0.008 g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AZ23C27-7-F, BZX84-C27LT1G offers higher power but no dual-element matching, while DZ23C27-7-F provides identical specs in inverted topology - choice depends strictly on board-level anode/cathode routing constraints and whether matched pair behavior is essential.

Availability

AZ23C27-7-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AZ23C27-7-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, specializing in high-reliability components for automotive, industrial, and computing markets.

AZ23C27-7-F belongs to the AZ23 series of dual Zener diodes designed specifically for space-constrained, high-precision voltage regulation and protection in automotive-grade and industrial environments.

FAQ

What is the maximum continuous current this dual Zener can handle at 27 V?

The AZ23C27-7-F is rated for 300 mW total dissipation. At nominal 27 V, this corresponds to ~11.1 mA average current (P = V × I). Derating applies above 75 °C ambient; actual safe current depends on PCB thermal design and duty cycle of conduction.

Can AZ23C27-7-F replace a single 27 V Zener in a circuit?

No - it is a dual common-anode device. Using only one cathode leaves the second Zener unconnected, potentially causing leakage or instability. For single-Zener replacement, use BZX84-C27LT1G or MMBZ5256B instead.

Is the 5% ΔV_Z tolerance guaranteed per unit or across lot?

The ≤5% ΔV_Z between the two Zener elements is measured and guaranteed per individual device at 25 °C, as confirmed in Diodes' DS18003 Rev. 18-2 test methodology on page 1.

Does this part support PPAP documentation for automotive programs?

Yes - the automotive-grade variant AZ23C27Q-7-F is PPAP-capable and manufactured in IATF 16949-certified facilities. Commercial AZ23C27-7-F does not include PPAP support unless upgraded to Q-suffix version.