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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Zener Diode Arrays

Diodes Incorporated AZ23C16-7

Name: AZ23C16-7
Brand: Diodes Incorporated
SKU: AZ23C16-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ23C16-7

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AZ23C16-7.pdf

Description:: DIODE ZENER ARRAY 16V SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,821

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Product details

Overview

AZ23C16-7 from Diodes Incorporated is a dual common-anode 16V Zener diode pair in SOT23 package, rated for 300mW total power dissipation, with ±5% matching between zener voltages (15.3–17.1V), 40Ω max zener impedance at 5mA, and +0.09%/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in power supply feedback loops.

For engineers reviewing the AZ23C16-7 datasheet, AZ23C16-7 pinout, AZ23C16-7 application, or AZ23C16-7 equivalent, key selection criteria include matched dual-zener tolerance, thermal resistance (417°C/W), JEDEC-qualified reliability, automotive-grade availability (Q-suffix), and SOT23 footprint compatibility with automated assembly.

Technical Context

This dual Zener operates in common-anode configuration: both cathodes are electrically isolated, sharing one anode terminal. It delivers stable 16V regulation under 5mA test current with ≤5% inter-diode V_Z mismatch, enabling balanced voltage referencing or differential clamping.

Thermal performance is defined for FR-4 PCB mounting per recommended pad layout (2.0mm × 0.9mm pads), with derating starting above 25°C ambient and full derating to zero at 150°C junction temperature - critical for compact power management designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage Range	15.3–17.1V at I_ZT = 5mA - defines usable regulation band for 16V nominal reference
Max Zener Impedance	40Ω at I_ZT = 5mA - ensures low dynamic resistance for stable output under load transients
Temperature Coefficient	+0.09%/°C - indicates positive drift; requires thermal compensation in high-precision references
Power Dissipation	300mW total - limits continuous current to ~18.75mA at 16V, constraining use in high-current shunt regulators
Min Reverse Voltage	12.0V at I_R = 0.1µA - guarantees reliable blocking below regulation threshold
Thermal Resistance	417°C/W junction-to-ambient - mandates careful PCB copper area planning for thermal management

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Common anode connection	Shared terminal for both Zener diodes; must be connected to lowest potential node in circuit
Cathode A (Pin 2)	Zener diode 1 cathode	Provides first 16V regulated output path; electrically isolated from Cathode B
Cathode B (Pin 3)	Zener diode 2 cathode	Provides second independent 16V regulated output; enables dual-rail or redundancy schemes

Key Features

Feature	Design Value
Dual Zeners, common anode	Enables compact dual-voltage reference or symmetrical clamping without discrete pairing
≤5% V_Z matching	Supports matched regulation paths in feedback networks or differential sensing circuits
JEDEC-qualified reliability	Validated to AEC-Q101 (HBM 8kV, MM 400V) and IEC 61000-4-2 (air 15kV/contact 8kV) ESD standards
Lead-free & halogen-free	Complies with RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb)

Applications

Switching Power Supply Feedback

Overvoltage Protection Circuit

Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback.

IC Role / Device Role / Timing Role: Dual-Zener provides precise 16V reference for TL431-like comparator input; common-anode simplifies bias network.

Use Value: Matched V_Z ensures consistent trip point across dual feedback paths, improving cross-regulation in multi-output supplies.

Use Scenario: Clamping transient surges on 12V automotive sensor lines exposed to load-dump events.

IC Role / Device Role / Timing Role: Acts as bidirectional shunt clamp: one Zener conducts positive spikes, the other handles negative transients relative to common anode.

Use Value: Single SOT23 replaces two discrete Zeners, reducing board space by 40% while maintaining ±16V clamping symmetry.

Industrial Analog Signal Conditioning

Redundant Reference Source

Use Scenario: Protecting ADC inputs from overvoltage in 4–20mA loop receivers operating in noisy factory environments.

IC Role / Device Role / Timing Role: Zener pair limits input swing to ±16V before protection diodes engage, extending front-end survival time.

Use Value: Low 40Ω Z_ZT minimizes voltage overshoot during fast transients, preserving signal integrity up to 1MHz.

Use Scenario: Providing backup voltage reference in safety-critical PLC modules requiring fault-tolerant design.

IC Role / Device Role / Timing Role: One Zener serves primary reference; second remains in standby, activated via external switch upon primary failure detection.

Use Value: Common-anode architecture allows seamless switchover with single control signal, eliminating reference glitch during transition.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX79-C16 (Nexperia)	Single 16V Zener, DO-35 through-hole, 400mW, ±5% tolerance, no dual-element matching	Lacks dual-Zener functionality; requires two devices for matched pairs, increasing footprint and mismatch risk	Select when board space permits through-hole mounting and dual-element matching is unnecessary
DZ23C16-7 (Diodes Inc.)	Common-cathode dual Zener, same V_Z range and SOT23 package, but inverted polarity configuration	Requires redesign of bias network polarity; incompatible with common-anode PCB layouts	Choose only if existing design uses common-cathode topology or needs reversed clamping direction

Compared with BZX79-C16 and DZ23C16-7, AZ23C16-7 uniquely delivers matched dual-Zener regulation in a single common-anode SOT23 device - essential for space-constrained, high-reliability feedback and clamping where inter-device V_Z tracking matters.

Availability

AZ23C16-7 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection circuits, and industrial analog signal conditioning requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant packaging.

Supply support for AZ23C16-7 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.

AZ23C16-7 belongs to the AZ23C series of dual Zener diodes designed specifically for automated SMT assembly, matched voltage referencing, and compact overvoltage protection in space-limited power systems.

FAQ

What is the maximum continuous Zener current for AZ23C16-7 at 25°C ambient?

At 25°C ambient and with recommended FR-4 pad layout, the maximum continuous Zener current is 18.75mA - calculated from 300mW / 16V. Exceeding this risks exceeding the 150°C maximum junction temperature, especially as ambient rises or PCB copper area is reduced.

Can AZ23C16-7 replace two separate 16V Zeners in a circuit?

Yes - its common-anode dual-Zener structure directly replaces two discrete 16V Zeners sharing a ground or low-side node. However, it cannot substitute for configurations requiring independent anodes or mixed voltage values, as both elements share identical V_Z range and polarity.

Is AZ23C16-7 qualified for automotive applications?

The commercial-grade AZ23C16-7 is not AEC-Q200 qualified. For automotive use, Diodes offers the Q-suffix variant AZ23C16Q-7-F, which is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949 certified facilities - verified in Diodes' Automotive Products portal.

How does the +0.09%/°C temperature coefficient affect long-term stability?

A +0.09%/°C TC means V_Z increases by ~14.4mV per °C rise at 16V. Over a 100°C range (−40°C to +125°C), this yields ~1.44V drift - significant for precision references. System-level compensation (e.g., thermistor networks or digital calibration) is required for sub-1% accuracy across temperature.

AZ23C16-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Configuration:: 1 Pair Common Anode

Voltage - Zener (Nom) (Vz):: 16 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

AZ23C16-7 FAQ

1.How can I place an order for AZ23C16-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ23C16-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AZ23C16-7 reliable?

The price and inventory of AZ23C16-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ23C16-7 is usually 5 days.

3.What payment methods are accepted for AZ23C16-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ23C16-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ23C16-7?

AZ23C16-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ23C16-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AZ23C16-7?

For technical support, including AZ23C16-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ23C16-7 requirements.

6.How does Aetrix verify that AZ23C16-7 is sourced from the original manufacturer or authorized distributors?

All AZ23C16-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AZ23C16-7 meets industry standards.

7.What is the process for return or replacement of AZ23C16-7?

All AZ23C16-7 units undergo pre-shipment inspection (PSI). If there is an issue with AZ23C16-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AZ23C16-7 part is unused and in its original packaging.

Return procedure for AZ23C16-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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