Diodes Incorporated AZ23C3V3-7-F

Overview

AZ23C3V3-7-F from Diodes Incorporated is a dual common-anode 3.3 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with ±5% matching between the two Zeners and 95 Ω typical Zener impedance at 5 mA. It serves precision voltage reference and overvoltage clamping functions in low-power analog monitoring circuits, such as sensor biasing and ADC reference stabilization.

For engineers reviewing the AZ23C3V3-7-F datasheet, AZ23C3V3-7-F pinout, AZ23C3V3-7-F application, or AZ23C3V3-7-F equivalent, key selection considerations include matched Zener voltage tolerance, thermal resistance (417 °C/W), JEDEC-qualified reliability, dual-diode configuration for differential sensing, and RoHS-compliant lead-free plating.

Technical Context

This dual Zener operates in reverse breakdown mode with a nominal Zener voltage of 3.3 V (range: 3.1–3.5 V) at 5 mA test current, exhibiting a negative temperature coefficient of –0.055 %/°C. Its matched pair architecture enables balanced voltage referencing in rail-to-rail signal conditioning paths.

The device uses a common-anode topology with three terminals - anode (Pin 1), cathode A (Pin 2), and cathode B (Pin 3) - enabling independent or complementary clamping across two signal lines sharing a common return path, ideal for bidirectional ESD protection and dual-rail regulation.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 rating, and 0.008 g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C3V3-7-F and DZ23C3V3-7-F, AZ23C3V3-7-F uniquely delivers matched dual 3.3 V Zeners in a common-anode arrangement - reducing component count, eliminating inter-device drift, and simplifying layout for symmetric voltage referencing tasks.

Availability

AZ23C3V3-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, low-power data acquisition systems, and safety-critical voltage monitoring circuits requiring stable component supply and long-term obsolescence management.

Supply support for AZ23C3V3-7-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.

AZ23C3V3-7-F belongs to the AZ23 series of dual Zener diodes designed specifically for space-constrained, high-matching applications where precision voltage referencing and bidirectional clamping are required in a single SOT23 package.

FAQ

What is the maximum continuous Zener current for AZ23C3V3-7-F?

The device is rated for 300 mW total power dissipation. At nominal 3.3 V Zener voltage, this corresponds to a maximum average current of approximately 91 mA (300 mW ÷ 3.3 V). However, derating applies above 25°C ambient per the power derating curve - at 85°C, max current drops to ~55 mA. Operation must stay within the safe operating area defined by V_Z, I_Z, and thermal limits.

Can AZ23C3V3-7-F be used in automotive applications?

Yes - the commercial-grade AZ23C3V3-7-F meets JEDEC high-reliability standards and is AEC-Q101 qualified for HBM ESD (8 kV). For full automotive qualification (AEC-Q200 compliance, PPAP, IATF 16949 manufacturing), the Q-suffix variant AZ23C3V3Q-7-F is required and listed on Diodes' automotive products page.

How is the 5% matching between Zeners verified?

Matching is measured at I_ZT = 5 mA under controlled lab conditions per DS18003 Rev. 18–2. The absolute difference between the two measured V_Z values is guaranteed ≤ 5% of the nominal 3.3 V value (i.e., ≤ 0.165 V). This specification is tested and binned during final test, not inferred from process capability.

Does AZ23C3V3-7-F support reverse-bias capacitance-critical designs?

No - the datasheet does not specify junction capacitance for AZ23C3V3-7-F. While Figure 5 shows typical C_T trends across the AZ23 family (e.g., ~100 pF at 3.3 V), no guaranteed min/max C_J is provided for this specific part. For capacitance-sensitive applications like RF biasing or high-speed clamping, consult Diodes' application note AN-2001 or select a part with published C_J specs.