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Diodes Incorporated DZ23C39-7
- Part No.:
- DZ23C39-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DZ23C39-7.pdf
- Description:
- DIODE ZENER ARRAY 39V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,558
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Product details
Overview
DZ23C39-7 from Diodes Incorporated is a dual common-cathode 300mW surface-mount Zener diode with nominal zener voltage 39V (37–41V range), ±5% matching between diodes, and 90Ω typical zener impedance at 5mA. It operates from −65°C to +150°C and is used for precision voltage reference and overvoltage protection in dual-rail power monitoring circuits.
For engineers reviewing the DZ23C39-7 datasheet, DZ23C39-7 pinout, DZ23C39-7 application, or DZ23C39-7 equivalent, key selection criteria include matched dual-zener tolerance, thermal resistance (417°C/W), SOT23 package compatibility, and temperature coefficient (+0.110%/°C) for stable biasing in industrial sensor interfaces.
Technical Context
This device integrates two discrete Zener diodes sharing a common cathode terminal in a single SOT23 package, enabling compact dual-reference generation without external interconnection. Its matched VZ deviation ≤5% supports differential sensing and rail-to-rail clamping where symmetry matters.
The +0.110%/°C temperature coefficient ensures predictable voltage drift across operating temperature, while 300mW power dissipation and 417°C/W junction-to-ambient thermal resistance define safe continuous operation on standard FR4 PCBs with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 37–41 V range at 5 mA test current - defines clamping threshold for 39 V nominal rail protection |
| Power Dissipation | 300 mW - sets maximum continuous DC or pulsed power handling on standard FR4 board |
| Zener Impedance | 90 Ω typical at IZT = 5 mA - determines regulation stiffness under load variation |
| Temperature Coefficient | +0.110 %/°C - quantifies positive VZ drift per degree Celsius for thermal design margining |
| Reverse Leakage | ≤0.1 µA at 29 V - ensures minimal quiescent current in high-impedance reference paths |
| Package | SOT23 - enables automated placement and reflow compatibility with 0.95 mm max height and 2.9 mm × 2.4 mm footprint |
Pinout & Package
Package: SOT23, 3-terminal plastic surface-mount case with matte tin-plated alloy 42 lead frame; UL 94V-0 rated molding compound; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | First Zener Anode | Connects to first Zener's P-side; reverse-biased to generate 39 V reference |
| 2 (Cathode) | Common Cathode | Shared N-side connection for both Zeners; ties to system ground or reference node |
| 3 (Anode B) | Second Zener Anode | Connects to second Zener's P-side; enables independent or complementary clamping |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zeners, Common Cathode | Enables space-efficient dual-voltage referencing or symmetrical overvoltage clamping in one footprint |
| VZ Matching ≤5% | Supports precision differential applications such as balanced supply monitoring or matched bias networks |
| 300 mW Power Rating | Allows direct use in low-power regulator feedback or transient suppression without derating below 85°C ambient |
| JEDEC-Q Qualified Reliability | Validated for high-reliability industrial environments per JEDEC standards referenced in AEC-Q |
Applications
| Industrial Sensor Signal Conditioning | Redundant Power Rail Monitoring |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Dual Zener provides matched 39 V references for differential ADC input scaling and fault-detection thresholds. Use Value: ≤5% VZ matching ensures <±0.5% gain error across dual signal paths, improving measurement repeatability. | Use Scenario: Simultaneous monitoring of primary and backup 36 V DC power rails in PLC backplanes. IC Role / Device Role / Timing Role: Each Zener anode independently clamps its rail; common cathode simplifies comparator interface to microcontroller. Use Value: Single-SOT23 footprint reduces PCB area by 40% vs. two discrete Zeners while maintaining isolation integrity. |
| Automotive Body Control Module (BCM) Protection | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Overvoltage clamp for LIN bus transceiver VCC supply in BCM modules exposed to load dump transients. IC Role / Device Role / Timing Role: One Zener absorbs 39 V surge energy; second serves as redundant reference for watchdog voltage supervisor. Use Value: Matched breakdown ensures coordinated response during fast transients, reducing false resets by >90% vs. unmatched pairs. | Use Scenario: Input stage protection for 24 V digital inputs in modular PLC I/O cards. IC Role / Device Role / Timing Role: Dual Zener shunts overvoltage on channel A and B simultaneously while sharing ground return path. Use Value: Common-cathode topology eliminates need for separate ground traces, lowering EMI susceptibility by 12 dB at 100 MHz. |
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 |
|---|---|---|---|
| BZX384-C39 | Single Zener, same 39 V rating, SOD323 package, 300 mW, but no dual configuration or VZ matching spec | Only suitable for single-rail reference; cannot replace dual-channel functionality | Select only when space allows two devices and matching is not required |
| DZ23C36-7 | Same dual-common-cathode SOT23 structure, 36 V nominal (34–38 V), identical thermal and matching specs | Used where lower clamping voltage is needed for 33 V systems or tighter tolerance margins | Drop-in replacement if 36 V threshold meets design requirements and 3 V headroom is acceptable |
Compared with BZX384-C39 and DZ23C36-7, DZ23C39-7 uniquely delivers matched dual 39 V references in one SOT23, enabling compact differential sensing and dual-rail protection unattainable with single-Zener alternatives or lower-voltage variants.
Availability
DZ23C39-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, redundant power rail monitoring, and automotive body control module protection requiring stable component supply and JEDEC-qualified reliability.
Supply support for DZ23C39-7 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 the Americas.
The DZ23 series targets cost-sensitive, high-volume applications needing matched dual Zener performance in ultra-small packages-designed specifically for automated assembly in industrial, automotive, and consumer power management systems.
FAQ
What is the maximum continuous reverse current the DZ23C39-7 can handle at 25°C?
The DZ23C39-7 is rated for 300 mW total power dissipation. At its nominal 39 V zener voltage, this corresponds to a maximum continuous reverse current of approximately 7.7 mA (300 mW ÷ 39 V). Exceeding this value risks thermal runaway unless board-level derating per the power derating curve is applied.
Does the DZ23C39-7 support automotive-grade qualification?
No-the DZ23C39-7 is a commercial-grade part. For automotive applications, Diodes offers the Q-suffix variant DZ23C39Q-7-F, qualified to AEC-Q101, manufactured in IATF 16949 certified facilities, and PPAP capable. The non-Q version lacks change control and automotive-specific reliability testing.
How is polarity identified on the DZ23C39-7 SOT23 package?
Polarity is marked by a molded cathode band near pin 2 (common cathode) on the top surface. Pin 1 is the leftmost terminal when the marking band is oriented at the top-left corner; pin 2 is center; pin 3 is rightmost. This matches standard SOT23 pinout orientation per JEDEC TO-236AB.
Can the DZ23C39-7 be used in place of two separate 1N4739A diodes?
No-1N4739A is a single 39 V, 1 W through-hole Zener in DO-41 package. DZ23C39-7 is a dual 39 V, 300 mW SOT23 device with common cathode. It cannot substitute for two independent 1N4739As due to shared cathode and lower power rating; it replaces two *matched* low-power SMD Zeners-not high-power through-hole parts.
DZ23C39-7 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):
- 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
DZ23C39-7 FAQ
1.How can I place an order for DZ23C39-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DZ23C39-7 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 DZ23C39-7 reliable?
The price and inventory of DZ23C39-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZ23C39-7 is usually 5 days.
3.What payment methods are accepted for DZ23C39-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZ23C39-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DZ23C39-7?
DZ23C39-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DZ23C39-7 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 DZ23C39-7?
For technical support, including DZ23C39-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZ23C39-7 requirements.
6.How does Aetrix verify that DZ23C39-7 is sourced from the original manufacturer or authorized distributors?
All DZ23C39-7 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 DZ23C39-7 meets industry standards.
7.What is the process for return or replacement of DZ23C39-7?
All DZ23C39-7 units undergo pre-shipment inspection (PSI). If there is an issue with DZ23C39-7, 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 DZ23C39-7 part is unused and in its original packaging.
Return procedure for DZ23C39-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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