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

Diodes Incorporated DZ23C18-7-F

Name: DZ23C18-7-F
Brand: Diodes Incorporated
SKU: DZ23C18-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DZ23C18-7-F

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

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

Datasheet:: DZ23C18-7-F.pdf

Description:: DIODE ZENER ARRAY 18V SOT23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DZ23C18-7-F from Diodes Incorporated is a dual common-cathode 18 V Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with matched zener voltage tolerance ≤5% between elements and ±0.09%/°C temperature coefficient. It provides precision voltage reference and overvoltage clamping in space-constrained dual-rail power monitoring circuits.

For engineers reviewing the DZ23C18-7-F datasheet, DZ23C18-7-F pinout, DZ23C18-7-F application, or DZ23C18-7-F equivalent, key selection criteria include dual-element matching, thermal resistance (417 °C/W), junction temperature range (–65 to +150 °C), and JEDEC-qualified reliability for industrial and automotive-grade designs.

Technical Context

This dual Zener operates in reverse breakdown mode with two independent anodes sharing one cathode terminal. Each element is characterized at I_ZT = 5.0 mA, with typical zener impedance of 50 Ω at I_ZK = 1.0 mA and 170 Ω at I_ZT.

The device exhibits a positive temperature coefficient of +0.090 %/°C across its operating range and maintains stable regulation down to 14.0 V minimum reverse voltage, enabling use in low-headroom biasing and dual-supply rail supervision.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage	16.8–19.1 V at 5.0 mA - defines nominal regulation point with ±5% matching between dual elements
Power Dissipation	300 mW - maximum total package power handling under FR4 board conditions with recommended pad layout
Zener Impedance	50 Ω @ I_ZT = 5 mA / 170 Ω @ I_ZK = 1 mA - determines output voltage stability under load transients
Temperature Coefficient	+0.090 %/°C - quantifies drift rate of zener voltage with ambient temperature change
Minimum Reverse Voltage	14.0 V @ I_R = 0.1 µA - ensures reliable turn-on margin before breakdown conduction begins
Thermal Resistance	417 °C/W - defines junction-to-ambient temperature rise per watt of dissipated power
Operating Temperature	–65 to +150 °C - supports extended-range industrial and under-hood automotive environments

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode 1 (Pin 1)	First Zener Anode	Reverse-biased input for first 18 V regulation path; connects to monitored rail or reference node
Cathode (Pin 2)	Common Cathode	Shared return node for both Zeners; ties to system ground or bias reference potential
Anode 2 (Pin 3)	Second Zener Anode	Reverse-biased input for second 18 V regulation path; enables dual-rail or redundancy monitoring

Key Features

Feature	Design Value
Dual Zener, Common Cathode	Enables compact dual-voltage reference or differential clamping without external node sharing
≤5% ΔV_Z Matching	Ensures consistent regulation thresholds across both elements for balanced sensing or redundancy
JEDEC High Reliability Qualification	Validated per AEC-Q stress standards for long-term stability in mission-critical applications
Lead-Free & Halogen-Free	Complies with RoHS 3 and "Green" definitions (<900 ppm Br/Cl, <1000 ppm Sb) for eco-sensitive designs
Automated Insertion Compatible	SOT23 footprint and marking support high-yield pick-and-place assembly in volume production

Applications

Industrial Power Monitoring

Automotive Battery Supervision

Use Scenario: Monitoring dual 18 V auxiliary rails in programmable logic controllers to detect undervoltage or overvoltage faults.

IC Role / Device Role / Timing Role: Dual Zener reference providing simultaneous threshold detection on separate supply lines.

Use Value: Eliminates need for two discrete SOT23 Zeners and reduces PCB area by 30% while maintaining matched regulation.

Use Scenario: Clamping transient spikes on 12 V battery-fed ECU inputs during load dump events in passenger vehicles.

IC Role / Device Role / Timing Role: Fast-response overvoltage protection element absorbing surge energy before downstream ICs.

Use Value: Withstands repetitive 300 mW pulses and operates reliably from –40 to +125 °C ambient.

Dual-Rail Sensor Biasing

Redundant Reference Generation

Use Scenario: Providing matched 18 V bias voltages for dual-channel analog front-ends in industrial current-sense amplifiers.

IC Role / Device Role / Timing Role: Precision voltage reference source with matched TC and V_Z for offset cancellation.

Use Value: ≤5% inter-element V_Z mismatch minimizes channel-to-channel gain error in differential systems.

Use Scenario: Generating redundant 18 V references in safety-critical medical power modules where single-point failure must be avoided.

IC Role / Device Role / Timing Role: Independent but identically specified Zener path supporting fault-tolerant monitoring architecture.

Use Value: Common-cathode topology allows shared thermal path and synchronized aging behavior between elements.

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-C18,113	Single 18 V Zener in DO-35; no dual-element matching or common cathode	Requires two devices and external node routing for dual-rail use; higher board area	Select when only one reference is needed or legacy through-hole assembly is required
DZ23C18Q-7-F	Automotive-qualified (AEC-Q101); identical electrical specs and SOT23 package	Qualified for PPAP and manufactured in IATF 16949 facilities; suitable for Tier-1 automotive programs	Select for automotive production where change control, traceability, and qualification documentation are mandatory

Compared with BZX79-C18,113 and DZ23C18Q-7-F, DZ23C18-7-F offers integrated dual-element matching in a compact SOT23 footprint for industrial designs, while DZ23C18Q-7-F adds automotive compliance without electrical trade-offs.

Availability

DZ23C18-7-F is available at Aetrix Electronics and suitable for industrial power monitoring, automotive battery supervision, dual-rail sensor biasing, and redundant reference generation requiring stable component supply across multi-year production cycles.

Supply support for DZ23C18-7-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.

The DZ23 series targets high-reliability voltage reference and protection applications in industrial, computing, and automotive systems, emphasizing matched dual-element performance and JEDEC-compliant robustness.

FAQ

What is the maximum continuous power dissipation for DZ23C18-7-F?

The device is rated for 300 mW total power dissipation under standard FR4 board mounting with Diodes' recommended pad layout. Derating begins above 25 °C ambient, reaching zero dissipation at 150 °C per the published derating curve. Exceeding this limit risks thermal runaway or parametric shift.

How is the "common cathode" configuration used in circuit design?

In the common cathode arrangement, Pin 2 serves as the shared cathode node tied to ground or reference potential, while Pins 1 and 3 act as independent anodes. This allows two separate reverse-biased paths-enabling dual-rail monitoring, differential clamping, or redundant reference generation without external node coupling.

Does DZ23C18-7-F meet automotive qualification requirements?

The DZ23C18-7-F is commercial-grade and not AEC-Q qualified. For automotive applications, Diodes specifies the DZ23C18Q-7-F variant, which undergoes AEC-Q101 stress testing, is PPAP-capable, and is produced in IATF 16949-certified facilities-identical in all electrical and mechanical specifications.

What does the "-7-F" suffix indicate in the part number?

The "-7-F" denotes tape-and-reel packaging: 3000 units per reel, with "7" indicating 7-inch reel diameter and "F" signifying Diodes' standard RoHS-compliant finish. This suffix is required for ordering and distinguishes the packaged product from bare die or alternative packaging formats.

DZ23C18-7-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 Cathode

Voltage - Zener (Nom) (Vz):: 18 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 50 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

DZ23C18-7-F FAQ

1.How can I place an order for DZ23C18-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DZ23C18-7-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 DZ23C18-7-F reliable?

The price and inventory of DZ23C18-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZ23C18-7-F is usually 5 days.

3.What payment methods are accepted for DZ23C18-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZ23C18-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DZ23C18-7-F?

DZ23C18-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DZ23C18-7-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 DZ23C18-7-F?

For technical support, including DZ23C18-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZ23C18-7-F requirements.

6.How does Aetrix verify that DZ23C18-7-F is sourced from the original manufacturer or authorized distributors?

All DZ23C18-7-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 DZ23C18-7-F meets industry standards.

7.What is the process for return or replacement of DZ23C18-7-F?

All DZ23C18-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DZ23C18-7-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 DZ23C18-7-F part is unused and in its original packaging.

Return procedure for DZ23C18-7-F:

1.Submit a request within 90 days.

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

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