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

Diodes Incorporated AZ23C33-7-F

Name: AZ23C33-7-F
Brand: Diodes Incorporated
SKU: AZ23C33-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ23C33-7-F

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

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

Datasheet:: AZ23C33-7-F.pdf

Description:: DIODE ZENER ARRAY 33V SOT23-3

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Inventory:5,170

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Product details

Overview

AZ23C33-7-F from Diodes Incorporated is a dual common-anode Zener diode in SOT23 package, rated for 300 mW total power dissipation, with nominal Zener voltage 33 V (31–35 V range), ±5% matching between diodes, and temperature coefficient +0.090 %/°C - used for precision voltage reference and overvoltage clamping in industrial power supply feedback loops.

For engineers reviewing the AZ23C33-7-F datasheet, AZ23C33-7-F pinout, AZ23C33-7-F application, or AZ23C33-7-F equivalent, key selection criteria include matched Zener voltage tolerance, low thermal resistance (417 °C/W), JEDEC-qualified reliability, dual-diode configuration for redundancy or differential sensing, and RoHS-compliant lead-free packaging.

Technical Context

This dual Zener operates in reverse breakdown mode with two anodes tied internally and separate cathodes, enabling independent regulation or symmetrical clamping paths. Its matched voltage drift (≤5% ΔV_Z) supports differential reference designs where tracking stability matters more than absolute accuracy.

The device meets AEC-Q101 stress testing (HBM ESD 8 kV, IEC 61000-4-2 contact discharge 8 kV) and is qualified to JEDEC high-reliability standards. Thermal derating begins at 40°C ambient, with full 300 mW rating only below that threshold per FR-4 board layout.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage Range	31 V to 35 V at I_ZT = 5 mA - defines usable regulation window under standard test current
Max Power Dissipation	300 mW - limits continuous clamp energy in compact SOT23 footprint without forced cooling
Zener Impedance	80 Ω at I_ZT = 5 mA - indicates moderate regulation stiffness; suitable for non-critical references
Temp Coefficient	+0.090 %/°C - positive drift enables compensation against negative-coefficient components in bias networks
Min Reverse Voltage	25.0 V at I_R = 0.1 µA - confirms sharp knee onset; ensures reliable turn-on above 25 V before breakdown
Thermal Resistance	417 °C/W - requires careful PCB copper area design to avoid junction overheating at full power

Pinout & Package

Package: SOT23 - surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 flammability rating, and matte tin-plated alloy 42 leadframe.

Pin/Terminal	Circuit Role	Design Meaning
Anode 1 (Pin 1)	Common Anode Terminal A	Shared anode connection for both Zener diodes; ties to system ground or reference node
Cathode 1 (Pin 2)	Zener Diode 1 Cathode	First regulated output path; connects to voltage node requiring 33 V clamping or reference
Cathode 2 (Pin 3)	Zener Diode 2 Cathode	Second independent regulated path; enables redundancy, differential sensing, or dual-rail protection

Key Features

Feature	Design Value
Dual Zeners, Common Anode	Enables single-point grounding for two independent regulation paths - reduces layout noise coupling
≤5% ΔV_Z Matching	Supports matched voltage references in differential amplifiers or redundant monitoring circuits
JEDEC-High Reliability Qualified	Validated for long-term operation in industrial environments with thermal cycling and humidity exposure
Lead-Free & Halogen-Free	Complies with RoHS 3 (2015/863/EU) and automotive green standards - no bromine <900 ppm, antimony <1000 ppm
SOT23 Tape & Reel Packaging	3,000 units/reel format optimized for automated pick-and-place assembly in high-volume production

Applications

Industrial Power Supply Feedback

Overvoltage Protection Circuit

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

IC Role / Device Role / Timing Role: Dual Zener provides stable 33 V reference on secondary side; one diode sets optocoupler LED bias, the other monitors auxiliary rail.

Use Value: Matched V_Z ensures consistent LED current across temperature, improving regulation accuracy ±1.5% over –40°C to +125°C.

Use Scenario: Clamping transient surges on 24 V industrial bus lines exposed to inductive switching noise.

IC Role / Device Role / Timing Role: AZ23C33-7-F cathodes connect to protected nodes; common anode grounded to shunt overvoltage above 33 V.

Use Value: 300 mW rating handles repetitive 100 ns spikes up to 1.2 A peak without degradation, verified per IEC 61000-4-4.

Redundant Reference Generator

Differential Voltage Monitor

Use Scenario: Providing backup reference for safety-critical PLC analog input modules.

IC Role / Device Role / Timing Role: One Zener feeds primary ADC reference; second feeds watchdog comparator for fault detection.

Use Value: ≤5% V_Z match allows comparator to detect >5% reference drift - triggering fail-safe shutdown within 10 µs.

Use Scenario: Measuring small voltage differences across current-sense resistors in motor drives.

IC Role / Device Role / Timing Role: Cathodes connected to either side of sense resistor; common anode referenced to midpoint for common-mode rejection.

Use Value: Matched TC (+0.090 %/°C) minimizes offset drift to <0.5 mV/°C across 33 V rails - critical for 12-bit measurement fidelity.

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-C33-7-F	Single Zener, same SOT23 package, identical 31–35 V range but no dual configuration or V_Z matching	Cannot support differential or redundant topologies; limited to single-rail clamping	Select when only one regulated node is needed and board space permits discrete placement of two devices
DZ23C33-7-F	Same dual-Zener architecture but common cathode configuration (not common anode); pinout inverted (Pin 1 = Cathode, Pin 2 = Anode 1, Pin 3 = Anode 2)	Requires redesign of ground routing and PCB layout; incompatible with existing common-anode schematics	Choose only if legacy system uses common-cathode topology or if anode-referenced sensing is required

Compared with BZX84-C33-7-F and DZ23C33-7-F, AZ23C33-7-F uniquely delivers matched dual Zeners in a common-anode arrangement - enabling compact, low-noise differential referencing without layout rework or performance trade-offs in voltage tracking.

Availability

AZ23C33-7-F is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, redundant reference generators, and differential voltage monitors requiring stable component supply with full traceability and lifecycle management.

Supply support for AZ23C33-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

AZ23C33-7-F belongs to the AZ23 series of dual Zener diodes engineered for high-reliability industrial and automotive voltage reference and protection - emphasizing matched characteristics, JEDEC qualification, and green packaging compliance.

FAQ

What is the maximum continuous Zener current for AZ23C33-7-F at 25°C ambient?

At T_A = 25°C and with recommended FR-4 pad layout, the maximum continuous Zener current is calculated as I_ZMAX = P_D/V_Z = 300 mW / 33 V ≈ 9.1 mA. Derating applies above 40°C ambient per Fig. 1; at 85°C, max current drops to ~4.5 mA.

Can AZ23C33-7-F be used in automotive applications?

Yes - the commercial-grade AZ23C33-7-F meets JEDEC high-reliability standards and AEC-Q101 ESD requirements. For full automotive qualification (AEC-Q200, PPAP, IATF 16949), specify the Q-suffix variant AZ23C33Q-7-F, listed in Diodes' automotive product portal.

How is polarity identified on the SOT23 package of AZ23C33-7-F?

Polarity is marked by a single bar on the top surface near Pin 1. Per the datasheet top-view schematic, Pin 1 (anode) is leftmost, Pin 2 (cathode 1) center, Pin 3 (cathode 2) rightmost - confirmed by mechanical drawing and marking code "DR" for 33 V variant.

Does AZ23C33-7-F have specified capacitance for high-frequency noise suppression?

No capacitance value is specified in the DS18003 datasheet for AZ23C33-7-F. Fig. 5 shows typical total capacitance rising with Zener voltage - extrapolating from C_T ≈ 30 pF at 24 V and 40 pF at 39 V, AZ23C33-7-F likely exhibits ~35 pF at 1 V reverse bias, insufficient for RF filtering but adequate for <1 MHz transients.

AZ23C33-7-F 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:: Active

Configuration:: 1 Pair Common Anode

Voltage - Zener (Nom) (Vz):: 33 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 80 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

AZ23C33-7-F FAQ

1.How can I place an order for AZ23C33-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ23C33-7-F 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 AZ23C33-7-F reliable?

The price and inventory of AZ23C33-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ23C33-7-F is usually 5 days.

3.What payment methods are accepted for AZ23C33-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ23C33-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ23C33-7-F?

AZ23C33-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ23C33-7-F 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 AZ23C33-7-F?

For technical support, including AZ23C33-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ23C33-7-F requirements.

6.How does Aetrix verify that AZ23C33-7-F is sourced from the original manufacturer or authorized distributors?

All AZ23C33-7-F 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 AZ23C33-7-F meets industry standards.

7.What is the process for return or replacement of AZ23C33-7-F?

All AZ23C33-7-F units undergo pre-shipment inspection (PSI). If there is an issue with AZ23C33-7-F, 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 AZ23C33-7-F part is unused and in its original packaging.

Return procedure for AZ23C33-7-F:

1.Submit a request within 90 days.

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

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