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Diodes Incorporated DDZ9711T-7
- Part No.:
- DDZ9711T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
DDZ9711T-7.pdf
- Description:
- DIODE ZENER 27V 150MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,344
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Product details
Overview
DDZ9711T-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage of 27 V, ±5% tolerance (25.65–28.35 V), 150 mW power dissipation, 0.05 µA reverse leakage at 20.4 V, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for portable power management and sensor signal conditioning.
For engineers reviewing the DDZ9711T-7 datasheet, DDZ9711T-7 pinout, DDZ9711T-7 application, or DDZ9711T-7 equivalent, this page delivers verified electrical specs, thermal derating behavior, cathode-band polarity confirmation, SOD523 footprint compatibility, and direct alternatives with validated voltage/leakage trade-offs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current (IZT = 50 µA). Its sharp knee characteristic and low leakage (<0.05 µA at VR = 20.4 V) support high-accuracy analog references in space-constrained designs.
Thermal resistance is 833 °C/W on FR-4 PCB with recommended pad layout, requiring derating above +25°C ambient per Fig. 1. The device exhibits a positive temperature coefficient (~0.08 %/°C at 27 V, per Fig. 18), enabling predictable drift in temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 27 V - Stable regulation point at IZT = 50 µA, used for precision biasing and reference generation |
| Zener Voltage Range | 25.65–28.35 V - ±5% tolerance ensures predictable clamping across production lots |
| Power Dissipation | 150 mW - Maximum continuous power at TA = +25°C; derates linearly above that temperature |
| Reverse Leakage Current | 0.05 µA @ VR = 20.4 V - Enables ultra-low quiescent current in battery-powered voltage monitors |
| Forward Voltage | 0.9 V @ IF = 10 mA - Confirmed conduction threshold for polarity verification and ESD protection paths |
| Package | SOD523 - 1.2 mm × 0.8 mm footprint with 0.3 mm height; compatible with high-density automated placement |
| Operating Temp | −65 to +150 °C - Supports industrial and automotive under-hood applications without derating penalties |
Pinout & Package
Package: SOD523 - ultra-small plastic surface-mount case with cathode band marking; dimensions: 1.2 mm × 0.8 mm × 0.3 mm (L × W × H); weight ≈ 0.002 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during forward bias; used for polarity check and ESD path routing |
| Cathode (marked) | Zener breakdown terminal | Connected to higher-potential node during regulation; cathode band identifies orientation for automated optical inspection |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown knee | Enables clean voltage clamping with minimal current variation across operating range |
| Low leakage current | 0.05 µA max at 76% of VZ supports microamp-level standby circuits without regulation error |
| SOD523 footprint | Reduces board area by >50% vs. SOD-123; maintains solder joint reliability under thermal cycling |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC MSL Level 1 standards; eliminates post-solder cleaning and corrosion risk |
Applications
| Portable Battery Monitor | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearables using a 12-bit ADC with internal reference. IC Role / Device Role / Timing Role: Provides stable 27 V reference for external voltage divider scaling; acts as precision clamp on ADC input protection network. Use Value: Tight 5% VZ tolerance and sub-0.1 µA leakage prevent measurement offset drift and extend battery life beyond 3 years. |
Use Scenario: Supplying excitation voltage to a 4–20 mA pressure transducer in factory automation. IC Role / Device Role / Timing Role: Regulates 27 V rail for bridge sensor biasing; absorbs transient surges from solenoid switching noise. Use Value: 150 mW rating and 833 °C/W RθJA allow operation at +85°C ambient without thermal runaway in sealed enclosures. |
| USB-C Power Negotiation Clamp | Automotive Cabin Controller Bias |
Use Scenario: Protecting CC line voltage during USB PD communication handshake in docking stations. IC Role / Device Role / Timing Role: Clamps CC line to 27 V during 20 V PD negotiation; absorbs ESD pulses per IEC 61000-4-2 Level 4. Use Value: Sharp breakdown and cathode-band polarity ensure fast response (<1 ns) without false triggering during dynamic voltage transitions. |
Use Scenario: Generating stable bias for LIN bus transceiver in vehicle seat control modules. IC Role / Device Role / Timing Role: Supplies regulated 27 V to transceiver VCC; withstands load-dump transients up to 40 V for 100 ms. Use Value: −65 to +150 °C operating range and green molding compound meet AEC-Q200 stress requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C27LT1G | Same 27 V nominal, but ±5% tolerance and 200 mW rating; higher leakage (1.0 µA @ 21.6 V) | Higher power margin suits intermittent surge clamping; less suitable for always-on reference rails | Select when thermal headroom >50 mW is required and leakage <0.1 µA is not critical |
| MMSZ5256ET1G | 27 V nominal, ±5%, but SOD-123 package (2.7 × 1.4 mm); 500 mW rating; leakage 1.0 µA @ 21.6 V | Larger footprint enables better heat dissipation in high-reliability industrial controls | Choose when board space allows larger package and higher surge energy absorption is needed |
Compared with BZX584C27LT1G and MMSZ5256ET1G, DDZ9711T-7 offers the smallest footprint and lowest leakage-critical for miniaturized, battery-sensitive designs-while trading off absolute power handling and surge robustness.
Availability
DDZ9711T-7 is available at Aetrix Electronics and suitable for portable battery monitors, industrial sensor references, USB-C power negotiation clamps, and automotive cabin controller bias circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ9711T-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, industry-standard components for power management, signal integrity, and protection.
The DDZ9xxxT series was designed specifically for space-constrained, low-leakage voltage regulation in portable and industrial systems-emphasizing SOD523 scalability, tight VZ tolerance, and green compliance without performance compromise.
FAQ
What is the maximum reverse voltage before breakdown for DDZ9711T-7?
The guaranteed breakdown occurs between 25.65 V and 28.35 V at test current IZT = 50 µA. Below 20.4 V, reverse leakage remains ≤0.05 µA; no specified "maximum non-breakdown" voltage is defined-the device is intended for operation in controlled reverse-bias regulation mode only.
Can DDZ9711T-7 be used in place of a 24 V Zener diode?
No-DDZ9711T-7 is strictly a 27 V device (25.65–28.35 V range). Substituting it for a 24 V Zener would raise regulation voltage by ≥1.65 V, potentially overdriving downstream circuitry. For 24 V, use DDZ9709T (24 V, 22.8–25.2 V range) instead.
Does DDZ9711T-7 require heatsinking in standard PCB layouts?
No heatsink is required. With RθJA = 833 °C/W on FR-4 and PD = 150 mW, junction-to-ambient rise is ~125 °C at +25°C ambient-still within −65 to +150°C rating. Derating begins above +25°C per Fig. 1, but full power is usable up to +50°C with standard copper pads.
How is polarity identified on the DDZ9711T-7 package?
Polarity is marked by a visible cathode band at one end of the SOD523 body. Per Diodes Inc. documentation, the banded end is the cathode; the unmarked end is the anode. This matches standard SOD523 orientation and is verified in top-view marking diagrams on page 2 of DS30553 Rev. 8-2.
DDZ9711T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 20.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
DDZ9711T-7 FAQ
1.How can I place an order for DDZ9711T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9711T-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 DDZ9711T-7 reliable?
The price and inventory of DDZ9711T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9711T-7 is usually 5 days.
3.What payment methods are accepted for DDZ9711T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9711T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9711T-7?
DDZ9711T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9711T-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 DDZ9711T-7?
For technical support, including DDZ9711T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9711T-7 requirements.
6.How does Aetrix verify that DDZ9711T-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9711T-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 DDZ9711T-7 meets industry standards.
7.What is the process for return or replacement of DDZ9711T-7?
All DDZ9711T-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9711T-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 DDZ9711T-7 part is unused and in its original packaging.
Return procedure for DDZ9711T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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