Diodes Incorporated AZ23C39-7-F

Overview

AZ23C39-7-F from Diodes Incorporated is a dual common-anode 39 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with ±5% matching between zener voltages (37–41 V), 90 Ω typical zener impedance at 5 mA, and +0.110 %/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in DC power rail supervision circuits.

For engineers reviewing the AZ23C39-7-F datasheet, AZ23C39-7-F pinout, AZ23C39-7-F application, or AZ23C39-7-F equivalent, this part supports dual-rail voltage regulation, matched reference generation, and ESD-robust transient suppression in space-constrained industrial and automotive control modules where thermal stability and unit-to-unit matching are critical.

Technical Context

This dual Zener operates in common-anode configuration: both cathodes are independent terminals, sharing one anode connection. It delivers matched breakdown behavior under 5 mA test current, with low thermal resistance (417 °C/W) on FR-4 PCBs and guaranteed operation from –65 °C to +150 °C.

The device exhibits +0.110 %/°C temperature coefficient above 30 V, enabling predictable drift compensation in reference circuits. Its 300 mW rating applies to the combined dissipation of both diodes, with derating starting at 40 °C ambient per the published curve.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C39T-7-F and DZ23C39-7-F, AZ23C39-7-F uniquely delivers matched dual 39 V references from a single common-anode node - reducing component count and improving thermal coupling for drift-sensitive applications.

Availability

AZ23C39-7-F is available at Aetrix Electronics and suitable for industrial power monitoring, automotive ECU reference design, and telecom DC-DC supervision requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AZ23C39-7-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 industrial, automotive, and computing markets.

AZ23C39-7-F belongs to the AZ23 series of dual Zener diodes designed specifically for space-constrained, thermally demanding applications requiring matched voltage references and robust ESD performance.

FAQ

What is the maximum continuous power each Zener can dissipate in AZ23C39-7-F?

The 300 mW rating applies to the total power dissipated by both Zeners combined. Neither diode is rated for 300 mW individually - simultaneous operation at full rating requires thermal derating per the datasheet curve, and peak per-diode dissipation must stay within the shared limit to avoid junction overheating.

Can AZ23C39-7-F replace a single 39 V Zener in existing designs?

Yes, but only if the circuit uses the common-anode configuration and connects only one cathode (Pin 2 or Pin 3) while leaving the other floating or unused. The unused cathode must not be shorted or loaded, as it remains electrically active and may affect leakage or thermal behavior.

Is AZ23C39-7-F qualified for automotive applications?

The commercial-grade AZ23C39-7-F is not AEC-Q200 qualified. For automotive use, Diodes offers the Q-suffix variant (e.g., AZ23C39Q-7-F), manufactured in IATF 16949-certified facilities and tested to AEC-Q101 stress requirements including HBM 8 kV ESD.

How does the +0.110 %/°C temperature coefficient impact accuracy over temperature?

At 39 V nominal, +0.110 %/°C translates to +42.9 mV/°C drift. Over a 100 °C range (–40 °C to +60 °C), this yields ~4.3 V total shift - making it suitable for applications where absolute accuracy is secondary to matched tracking between dual channels or where external compensation is applied.