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

Diodes Incorporated DZ23C51-7

Name: DZ23C51-7
Brand: Diodes Incorporated
SKU: DZ23C51-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DZ23C51-7

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

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

Datasheet:: DZ23C51-7.pdf

Description:: DIODE ZENER ARRAY 51V SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:9,535

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Product details

Overview

DZ23C51-7 from Diodes Incorporated is a dual common-cathode 300mW surface-mount Zener diode with nominal zener voltage 51V (48–54V range), maximum zener impedance 100Ω at 5mA, temperature coefficient +0.110%/°C, and SOT23 package - used for precision voltage reference and overvoltage protection in power supply feedback loops and sensor biasing circuits.

For engineers reviewing the DZ23C51-7 datasheet, DZ23C51-7 pinout, DZ23C51-7 application, or DZ23C51-7 equivalent, key selection criteria include dual-zener matching (≤5% ΔV_Z), low thermal resistance (417°C/W), JEDEC-qualified reliability, and compatibility with automated SMT assembly on FR4 PCBs.

Technical Context

This dual-Zener device integrates two independent zener elements sharing a common cathode terminal, enabling compact dual-reference or differential clamping topologies. Its matched breakdown voltages support ratiometric sensing and redundant voltage monitoring without external matching components.

The device operates across –65°C to +150°C, with power derating above 50°C per the defined curve. Reverse leakage remains ≤0.1µA at 38V minimum reverse voltage, ensuring stable regulation under light-load conditions in low-power systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage Range	48 V to 54 V - defines regulation window for feedback or clamp operation
Power Dissipation	300 mW - sets maximum continuous DC or pulsed power handling on standard FR4 layout
Zener Impedance	100 Ω @ I_ZT = 5 mA - determines output voltage stability under load variation
Temperature Coefficient	+0.110 %/°C - quantifies voltage drift magnitude per degree ambient change
Minimum Reverse Voltage	38 V - specifies lowest voltage at which device maintains specified leakage (0.1 µA)
Thermal Resistance	417 °C/W - links junction-to-ambient temperature rise to power dissipation

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated alloy 42 lead frame, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode 1)	First Zener Anode	Connects to first zener element's anode; enables independent forward/reverse bias control
Pin 2 (Cathode)	Common Cathode	Shared cathode node for both zeners; simplifies PCB routing in dual-reference designs
Pin 3 (Anode 2)	Second Zener Anode	Connects to second zener element's anode; allows differential or complementary clamping

Key Features

Feature	Design Value
Dual Zeners, Common Cathode	Enables space-efficient dual-voltage reference or bidirectional overvoltage protection in one footprint
ΔV_Z ≤ 5%	Ensures tight matching between two zener elements for ratiometric accuracy in sensing applications
JEDEC High Reliability Qualification	Validates robustness for industrial and automotive-adjacent environments without AEC-Q suffix
Lead-Free & Halogen-Free	Complies with RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb)

Applications

Industrial Power Supply Feedback

Automotive Sensor Biasing

Use Scenario: Regulating isolated flyback converter output via optocoupler feedback network.

IC Role / Device Role / Timing Role: Dual-Zener provides precise 51V reference for TL431-like comparator input and secondary-side overvoltage clamp.

Use Value: Matched V_Z ensures consistent trip point across temperature, reducing calibration drift in closed-loop control.

Use Scenario: Providing stable bias voltage to MEMS pressure sensor in engine control unit.

IC Role / Device Role / Timing Role: Supplies regulated 51V excitation while clamping transients induced by solenoid switching.

Use Value: Common-cathode configuration minimizes board area and eliminates discrete matching resistors.

Medical Instrumentation Reference

Telecom Line Interface Protection

Use Scenario: Generating dual-rail references for analog front-end of portable ECG amplifier.

IC Role / Device Role / Timing Role: One zener sets high-side reference; the other provides low-side clamp against ESD-induced overshoot.

Use Value: ≤5% ΔV_Z supports sub-0.5% absolute accuracy in calibrated measurement paths.

Use Scenario: Protecting RS-485 transceiver inputs from lightning-induced surges on outdoor cabling.

IC Role / Device Role / Timing Role: Acts as bidirectional transient voltage suppressor with fast response and low clamping variance.

Use Value: 300mW rating and 417°C/W R_θJA allow sustained surge absorption without thermal runaway on standard PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-C51	Single Zener, same 51V rating and SOT23 package, no dual-element matching	Lacks common-cathode dual functionality; suitable only for single-reference use	Select when only one regulated voltage is needed and board space permits separate devices
DZ23C47	Same dual-common-cathode structure, lower 47V nominal rating (44–50V), +0.110%/°C TC	Provides tighter regulation margin for 48V system rails; not interchangeable at 51V target	Choose for 48V nominal systems requiring identical dual-Zener topology and matching performance

Compared with BZX384-C51 and DZ23C47, DZ23C51-7 uniquely delivers matched 51V dual-zener regulation in one SOT23 footprint - critical for differential sensing, redundancy, or compact dual-rail feedback where voltage symmetry and thermal tracking matter.

Availability

DZ23C51-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, medical instrumentation, and telecom line interfaces requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DZ23C51-7 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

DZ23C51-7 belongs to the DZ23 series of dual common-cathode Zener diodes, engineered for high-reliability voltage reference and protection in space-constrained, thermally demanding applications such as power conversion and sensor conditioning.

FAQ

What is the maximum continuous power dissipation for DZ23C51-7 at 25°C ambient?

DZ23C51-7 has a rated power dissipation of 300 mW at TA = +25°C when mounted on an FR4 PCB with the recommended pad layout. Derating begins linearly above 50°C ambient, reaching zero dissipation at approximately 125°C per the published power derating curve.

Does DZ23C51-7 meet automotive qualification standards?

DZ23C51-7 is JEDEC-qualified for high reliability but is not AEC-Q101 qualified. For automotive applications, Diodes offers the Q-suffix variant DZ23C51Q-7-F, which is manufactured in IATF 16949-certified facilities and supports PPAP documentation.

How is polarity identified on the DZ23C51-7 SOT23 package?

Polarity is marked by a cathode band adjacent to Pin 2 (common cathode). Pin 1 is Anode 1, Pin 2 is common cathode, and Pin 3 is Anode 2 - confirmed by the top-view schematic in DS18002 Rev. 22-2, page 2.

Can DZ23C51-7 replace a single 51V Zener diode in a circuit?

Yes - Pin 1 and Pin 2 can be used as a standard 51V Zener (Anode–Cathode), while Pin 3 remains unconnected. However, doing so forfeits the dual-element advantage and may require layout revision to isolate the unused anode terminal.

DZ23C51-7 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 Cathode

Voltage - Zener (Nom) (Vz):: 51 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

DZ23C51-7 FAQ

1.How can I place an order for DZ23C51-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DZ23C51-7 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 DZ23C51-7 reliable?

The price and inventory of DZ23C51-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZ23C51-7 is usually 5 days.

3.What payment methods are accepted for DZ23C51-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZ23C51-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DZ23C51-7?

DZ23C51-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DZ23C51-7 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 DZ23C51-7?

For technical support, including DZ23C51-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZ23C51-7 requirements.

6.How does Aetrix verify that DZ23C51-7 is sourced from the original manufacturer or authorized distributors?

All DZ23C51-7 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 DZ23C51-7 meets industry standards.

7.What is the process for return or replacement of DZ23C51-7?

All DZ23C51-7 units undergo pre-shipment inspection (PSI). If there is an issue with DZ23C51-7, 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 DZ23C51-7 part is unused and in its original packaging.

Return procedure for DZ23C51-7:

1.Submit a request within 90 days.

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

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