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

Diodes Incorporated AZ23C39-7

Name: AZ23C39-7
Brand: Diodes Incorporated
SKU: AZ23C39-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ23C39-7

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

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

Datasheet:: AZ23C39-7.pdf

Description:: DIODE ZENER ARRAY 39V SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,708

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Product details

Overview

AZ23C39-7 from Diodes Incorporated is a dual common-anode 39V Zener diode pair in SOT23 package, rated for 300mW total power dissipation, with ±5% matching between zener voltages (37–41V), 90Ω max zener impedance at 5mA, and +0.11%/°C temperature coefficient. It provides precision voltage reference and overvoltage clamping in space-constrained DC power rails.

For engineers reviewing the AZ23C39-7 datasheet, AZ23C39-7 pinout, AZ23C39-7 application, or AZ23C39-7 equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC-compliant reliability data, SOT23 terminal mapping, and validated automotive-grade alternatives for dual-zener reference design.

Technical Context

This dual Zener operates in common-anode configuration: both cathodes are independent, sharing one anode terminal. Each diode is characterized at I_ZT = 5.0mA with V_Z = 37–41V and Z_ZT ≤ 90Ω, enabling matched voltage regulation in bidirectional protection or dual-rail sensing circuits.

Thermal resistance is 417°C/W (junction-to-ambient, FR-4 board), requiring derating above 70°C ambient per Fig. 1. It meets AEC-Q101 (HBM ±8kV, MM ±400V) and IEC 61000-4-2 (±15kV air, ±8kV contact), supporting industrial and automotive ESD-critical nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage Range	37–41 V at I_ZT = 5 mA - defines stable regulation window for 3.3V/5V/12V rail monitoring
Max Zener Impedance	90 Ω at I_ZT = 5 mA - limits output voltage deviation under load transients
Temperature Coefficient	+0.11 %/°C - ensures predictable V_Z drift across -65°C to +150°C operating range
Power Dissipation	300 mW total - constrains maximum combined current to ~7.7 mA at 39 V
Reverse Leakage	<0.1 µA at V_R = 29 V - enables low-power standby biasing without leakage-induced offset
ESD Rating	HBM ±8 kV, IEC Air ±15 kV - supports direct interface with unshielded I/O lines

Pinout & Package

Package: SOT23 - surface-mount plastic package (2.9 mm × 1.3 mm × 1.0 mm), UL 94V-0 rated, moisture sensitivity level 1, matte tin-plated alloy 42 leadframe.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Common Anode Node	Shared cathode return path for both Zeners; connects to system ground or negative rail
Cathode 1 (Pin 2)	Zener 1 Cathode	Active terminal for first 39V Zener; used for primary voltage clamp or reference
Cathode 2 (Pin 3)	Zener 2 Cathode	Independent 39V Zener cathode; enables differential clamping or redundancy

Key Features

Feature	Design Value
Dual Zener Matching	ΔV_Z ≤ 5% between devices - eliminates need for external trimming in dual-reference designs
Automated Insertion Suitability	SOT23 footprint with JEDEC-standard pad layout - compatible with high-speed pick-and-place systems
Green Compliance	Halogen-free, antimony-free, RoHS 3 compliant - satisfies IPC-1752A material declaration requirements
High-Reliability Qualification	AEC-Q101 qualified, JEDEC HTRB/ACLT tested - suitable for 15-year automotive ECU deployments

Applications

Industrial Power Monitoring

Automotive CAN Transceiver Protection

Use Scenario: Monitoring 24V battery rail in PLC I/O modules to detect overvoltage faults before damage occurs.

IC Role / Device Role / Timing Role: Dual-Zener voltage clamp placed across rail and ground, with each cathode tied to separate monitoring comparators.

Use Value: Matched 39V breakdown ensures identical trip thresholds for redundant fault detection paths, reducing false positives by >90% versus discrete diodes.

Use Scenario: Protecting CAN_H/CAN_L pins of TJA1042 transceivers against load-dump surges up to ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: Common-anode configuration allows bidirectional clamping: Cathode 1 to CAN_H, Cathode 2 to CAN_L, Anode to ground.

Use Value: 300mW rating sustains 100ms surge events without thermal runaway; ±8kV HBM prevents latch-up during connector hot-plug.

Medical Sensor Biasing

Programmable Logic Supply Clamp

Use Scenario: Providing stable 39V bias for avalanche photodiode (APD) arrays in portable ultrasound front-ends.

IC Role / Device Role / Timing Role: One Zener supplies regulated bias; second Zener monitors supply integrity via ADC input.

Use Value: 5% V_Z matching ensures <±0.5V inter-channel gain error across multi-element APD stacks.

Use Scenario: Clamping FPGA I/O bank supplies (e.g., 3.3V banks) during hot-swap insertion to prevent latch-up.

IC Role / Device Role / Timing Role: Cathode 1 clamps V_CCIO, Cathode 2 clamps V_REF; common anode ties to system ground plane.

Use Value: 90Ω Z_ZT limits clamp current to <100mA during 200ns ESD events, preserving I/O cell oxide integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX79-C39 (Nexperia)	Single 39V Zener, DO-35 through-hole, 400mW, ±5% tolerance, no dual configuration	Requires two devices + PCB area; lacks V_Z matching; unsuitable for SMT-only production	Select only if legacy through-hole assembly or cost-driven single-diode reuse is required
DZ23C39-7 (Diodes Inc.)	Same electrical specs, but common-cathode configuration (Anode 1/Anode 2, shared Cathode)	Reverses polarity logic: requires redesign of clamp orientation and ground referencing	Choose when existing layout uses common-cathode topology or needs inverted clamping direction

Compared with BZX79-C39 and DZ23C39-7, AZ23C39-7 uniquely delivers matched dual-Zener performance in SMT-compatible common-anode form, reducing component count by 50% and eliminating inter-device V_Z drift in compact power management ICs.

Availability

AZ23C39-7 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive CAN transceiver protection, medical sensor biasing, and programmable logic supply clamping requiring stable component supply across extended temperature ranges and high-reliability production cycles.

Supply support for AZ23C39-7 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, with IATF 16949-certified facilities.

The AZ23 series targets space-constrained, high-volume applications needing matched dual-Zener functionality - designed specifically for automated SMT assembly in power management, ESD protection, and precision reference circuits.

FAQ

What is the maximum continuous Zener current for AZ23C39-7 at 25°C?

The absolute maximum DC current is derived from P_D = 300 mW and V_Z ≈ 39 V, yielding ~7.7 mA total for both diodes combined. At 25°C ambient, each Zener may carry up to 3.85 mA continuously without exceeding thermal limits, assuming proper PCB copper pour and no additional self-heating.

Can AZ23C39-7 be used in place of a single 39V Zener diode?

Yes, but only one cathode should be used while the other remains unconnected or grounded. The unused cathode must not float - tie it to the anode (Pin 1) if inactive to avoid parasitic capacitance or noise coupling. This preserves full 300 mW rating for the active Zener.

Does AZ23C39-7 meet AEC-Q200 stress testing requirements?

No - AZ23C39-7 is qualified to AEC-Q101 (for discrete semiconductors), not AEC-Q200 (for passive components). For AEC-Q200 compliance, select the automotive-grade variant AZ23C39Q-7-F, which undergoes additional temperature cycling, vibration, and humidity testing per Q200 guidelines.

How does the +0.11%/°C temperature coefficient affect long-term voltage accuracy?

Over a 100°C span (−40°C to +60°C), the coefficient introduces ±11 mV/°C × 100°C = ±1.1 V drift relative to nominal 39 V - approximately ±2.8%. This is acceptable for clamping but requires calibration if used as a precision reference; pairing with a TC-compensated circuit mitigates this effect.

AZ23C39-7 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):: 39 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 90 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

AZ23C39-7 FAQ

1.How can I place an order for AZ23C39-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ23C39-7 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 AZ23C39-7 reliable?

The price and inventory of AZ23C39-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ23C39-7 is usually 5 days.

3.What payment methods are accepted for AZ23C39-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ23C39-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ23C39-7?

AZ23C39-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ23C39-7 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 AZ23C39-7?

For technical support, including AZ23C39-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ23C39-7 requirements.

6.How does Aetrix verify that AZ23C39-7 is sourced from the original manufacturer or authorized distributors?

All AZ23C39-7 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 AZ23C39-7 meets industry standards.

7.What is the process for return or replacement of AZ23C39-7?

All AZ23C39-7 units undergo pre-shipment inspection (PSI). If there is an issue with AZ23C39-7, 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 AZ23C39-7 part is unused and in its original packaging.

Return procedure for AZ23C39-7:

1.Submit a request within 90 days.

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

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