Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated AZ23C43-7

Name: AZ23C43-7
Brand: Diodes Incorporated
SKU: AZ23C43-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AZ23C43-7

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

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

Datasheet:: AZ23C43-7.pdf

Description:: DIODE ZENER ARRAY 43V SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,426

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AZ23C43-7 from Diodes Incorporated is a dual common-anode 300 mW surface-mount Zener diode with nominal Zener voltage 43 V (40–46 V range), ±5% matching between diodes, and 100 Ω typical Zener impedance at 5 mA. It operates from −65 °C to +150 °C and is used for precision voltage reference and overvoltage clamping in power supply feedback loops.

For engineers reviewing the AZ23C43-7 datasheet, AZ23C43-7 pinout, AZ23C43-7 application, or AZ23C43-7 equivalent, key selection criteria include matched dual-Zener tolerance, thermal resistance (417 °C/W), JEDEC-qualified reliability, SOT23 package compatibility, and automotive-grade qualification path via Q-suffix variants.

Technical Context

This dual Zener diode integrates two identical Zener elements sharing a common anode terminal, enabling symmetrical clamping or dual-reference generation in compact space-constrained designs. Its 300 mW power rating and 417 °C/W junction-to-ambient thermal resistance require careful PCB pad layout per Diodes' recommended footprint.

The device exhibits a +0.110 %/°C temperature coefficient and maintains ≤5% ΔV_Z between diodes in one package - critical for differential sensing and matched biasing applications where tracking stability matters more than absolute voltage accuracy.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage Range	40–46 V at I_ZT = 5 mA; defines usable regulation window under standard test conditions
Power Dissipation	300 mW maximum; limits continuous clamping current to ~7 mA at 43 V without derating
Zener Impedance	100 Ω typical at 5 mA; determines output voltage variation under load transients
Temperature Coefficient	+0.110 %/°C; indicates positive drift with temperature - critical for high-temp stability design
Max ΔV_Z	≤5% between diodes; enables matched dual-reference use without external trimming
Operating Temperature	−65 °C to +150 °C; supports industrial and under-hood automotive environments
ESD Rating	HBM 8 kV / IEC 61000-4-2 Air 15 kV; reduces need for external ESD protection in board-level design

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.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Common anode connection for both Zener diodes	Single input node for dual-clamp configuration; requires external current limiting resistor
Cathode A (Pin 2)	Zener diode A cathode	First regulated output node; reverse-biased to conduct at 40–46 V
Cathode B (Pin 3)	Zener diode B cathode	Second regulated output node; electrically matched to Cathode A within 5%

Key Features

Feature	Design Value
Dual Zeners, common anode	Enables single-resistor biasing of two matched reference nodes - reduces component count in feedback networks
≤5% ΔV_Z matching	Supports differential voltage monitoring and ratiometric sensing without calibration
JEDEC-qualified reliability	Validated to AEC-Q101 stress standards - suitable for automotive power management modules
SOT23 footprint	Compatible with automated pick-and-place and reflow processes; occupies <1.5 mm² board area
Lead-free & halogen-free	Fully RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental compliance mandates

Applications

Industrial Power Supply Feedback

Automotive Load Dump Protection

Use Scenario: Regulating isolated DC-DC converter output via optocoupler feedback loop.

IC Role / Device Role / Timing Role: Dual Zener provides stable 43 V reference for TL431-like comparator function and redundancy path.

Use Value: Matched V_Z ensures consistent trip point across temperature, improving output regulation accuracy to ±1.5% over −40 °C to +125 °C.

Use Scenario: Clamping transient spikes on 24 V vehicle battery rail during alternator load dump events.

IC Role / Device Role / Timing Role: Common-anode dual Zener absorbs bidirectional surges up to ISO 7637-2 Pulse 5a (110 V/100 ms).

Use Value: 300 mW rating and 150 °C max T_J allow sustained clamping without thermal runaway in engine bay environments.

Redundant Reference Generator

High-Voltage Sensor Biasing

Use Scenario: Providing backup voltage reference for analog-to-digital conversion in safety-critical PLC I/O modules.

IC Role / Device Role / Timing Role: Two independent 43 V references feed separate ADC reference inputs for cross-checking.

Use Value: ≤5% inter-diode V_Z mismatch enables fault detection when deviation exceeds threshold - supports SIL2 diagnostics.

Use Scenario: Biasing high-impedance voltage dividers in HV battery monitoring systems (e.g., 400–800 V EV packs).

IC Role / Device Role / Timing Role: Stabilizes divider node at 43 V to prevent op-amp saturation during fast transients.

Use Value: +0.110 %/°C TC and low capacitance (<2 pF) minimize measurement drift and phase error in precision HV sensing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C43-7-F	Single Zener in SOT23; no dual-element or matching spec	Lacks matched dual-output capability; requires two devices for same function	Select only if discrete reference nodes suffice and board area allows duplication
DZ23C43-7-F	Common-cathode dual Zener; same V_Z range but inverted polarity	Requires redesign of bias network - anode becomes output, cathodes grounded	Choose when existing schematic uses common-cathode topology or needs ground-referenced clamping

Compared with BZX84-C43-7-F and DZ23C43-7-F, AZ23C43-7 uniquely delivers matched dual-Zener regulation from a single common-anode node - reducing bill-of-materials count and improving thermal tracking in compact power management circuits.

Availability

AZ23C43-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive load-dump protection circuits, redundant reference generators, and high-voltage sensor biasing requiring stable component supply and JEDEC-qualified reliability.

Supply support for AZ23C43-7 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 industrial, automotive, and computing markets.

AZ23C43-7 belongs to the AZ23 series of dual Zener diodes designed specifically for space-constrained voltage regulation and matched clamping applications where thermal tracking and process-matched performance are essential.

FAQ

What is the maximum continuous Zener current for AZ23C43-7 at 25°C?

The maximum continuous Zener current is calculated from P_D = 300 mW and V_Z ≈ 43 V, yielding ~7.0 mA. Derating begins above 25°C per the power derating curve - at 100°C ambient, max current drops to ~4.2 mA to maintain safe junction temperature.

Does AZ23C43-7 meet AEC-Q101 requirements?

AZ23C43-7 is qualified to JEDEC standards referenced in AEC-Q101 and carries HBM ESD rating of 8 kV. For full AEC-Q101 certification including PPAP documentation and IATF 16949 manufacturing, the automotive-grade variant AZ23C43Q-7-F must be selected.

How is polarity identified on the SOT23 package?

Polarity is marked by a bar on the top surface near Pin 1 (anode). The standard SOT23 pinout is: Pin 1 = Anode, Pin 2 = Cathode A, Pin 3 = Cathode B. This matches the top-view schematic in DS18003 Rev. 18-2, page 2.

Can AZ23C43-7 replace single-Zener diodes in existing designs?

Yes - with circuit modification. Its common-anode configuration requires relocating the current-limiting resistor to the anode side and routing each cathode independently. Direct replacement of a single Zener is not possible without rewiring, but it enables new dual-reference functionality in the same footprint.

AZ23C43-7 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):: 43 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 100 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

AZ23C43-7 FAQ

1.How can I place an order for AZ23C43-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ23C43-7 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 AZ23C43-7 reliable?

The price and inventory of AZ23C43-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ23C43-7 is usually 5 days.

3.What payment methods are accepted for AZ23C43-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ23C43-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ23C43-7?

AZ23C43-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ23C43-7 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 AZ23C43-7?

For technical support, including AZ23C43-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ23C43-7 requirements.

6.How does Aetrix verify that AZ23C43-7 is sourced from the original manufacturer or authorized distributors?

All AZ23C43-7 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 AZ23C43-7 meets industry standards.

7.What is the process for return or replacement of AZ23C43-7?

All AZ23C43-7 units undergo pre-shipment inspection (PSI). If there is an issue with AZ23C43-7, 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 AZ23C43-7 part is unused and in its original packaging.

Return procedure for AZ23C43-7:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…