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Diodes Incorporated DDZ9712T-7
- Part No.:
- DDZ9712T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
DDZ9712T-7.pdf
- Description:
- DIODE ZENER 28V 150MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,024
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Product details
Overview
DDZ9712T-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 28 V, ±5% tolerance (26.6–29.4 V), 150 mW power rating, 0.05 µA max reverse leakage at 21.2 V, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for portable electronics and sensor signal conditioning.
For engineers reviewing the DDZ9712T-7 datasheet, DDZ9712T-7 pinout, DDZ9712T-7 application, or DDZ9712T-7 equivalent, key selection criteria include zener voltage accuracy, low leakage at rated VR, thermal resistance (833 °C/W), sharp breakdown characteristics, and compatibility with automated SMT assembly on space-constrained PCBs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable voltage across its terminals under controlled current (IZT = 5 mA). Its sharp knee and low dynamic impedance (<100 Ω typical at IZ = 5 mA) enable accurate regulation in low-current analog circuits.
The SOD523 package delivers minimal footprint (0.8 × 1.2 mm) and thermal performance suited for ambient temperatures from –65 °C to +150 °C. Power derating begins linearly above +25 °C per Fig. 1, reaching zero dissipation at +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 28 V - Stable regulation point at 5 mA test current |
| Zener Voltage Range | 26.6–29.4 V - ±5% tolerance ensures predictable clamping in production |
| Power Dissipation | 150 mW - Maximum continuous power at 25 °C ambient; derates to zero at 150 °C |
| Reverse Leakage Current | 0.05 µA max at 21.2 V - Enables ultra-low standby current in battery-powered references |
| Forward Voltage | 0.9 V at 10 mA - Low forward drop supports bidirectional protection or dual-use biasing |
| Thermal Resistance | 833 °C/W - Requires careful pad layout per Diodes' recommended footprint for thermal reliability |
| Operating Temperature | –65 to +150 °C - Suitable for industrial and automotive under-hood environments |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case (0.8 × 1.2 mm footprint, 0.6 mm height), cathode indicated by band marking, matte tin-plated alloy 42 leadframe, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to lower-potential side in zener configuration; used for forward-bias applications |
| Cathode | Reverse breakdown terminal / Regulated output node | Marked with band; connects to higher-potential rail to clamp or reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| Sharp Breakdown Knee | Enables precise voltage threshold detection without soft clipping in protection circuits |
| Low Leakage (0.05 µA) | Minimizes quiescent current draw in always-on voltage references and battery monitoring |
| SOD523 Footprint | Reduces board area by >50% vs. SOD-123; compatible with high-density 0201-class placement |
| Lead-Free & Green Construction | Fully compliant with RoHS 2 and halogen/antimony limits (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture Sensitivity Level 1 | Eliminates bake requirements before reflow; supports standard SMT line handling |
Applications
| Portable Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 28 V bias to MEMS pressure sensor front-end in handheld medical devices. IC Role / Device Role / Timing Role: Zener reference diode establishing fixed bias voltage for analog signal chain. Use Value: Tight 5% voltage tolerance and sub-0.1 µA leakage ensure sensor offset stability and multi-year battery life. |
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Reverse-biased overvoltage protection element shunting excess energy to ground. Use Value: Sharp breakdown at 28 V prevents damage to 5 V tolerant PHY while minimizing capacitance-induced signal distortion. |
| Industrial PLC Analog Input Protection | Low-Power IoT Node Reference |
Use Scenario: Protecting 24 V analog input channels against field-wiring faults and ESD in programmable logic controllers. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to safe range for downstream ADC driver op-amps. Use Value: 150 mW rating and 833 °C/W RθJA allow reliable operation without heatsinking in confined DIN-rail enclosures. |
Use Scenario: Generating precision 28 V reference for low-noise LDO feedback divider in NB-IoT cellular modules. IC Role / Device Role / Timing Role: Passive voltage reference source feeding resistive divider network. Use Value: Ultra-low leakage preserves divider ratio accuracy across temperature, enabling ±0.5% system voltage regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C27 | 27 V nominal, ±5%, 300 mW rating, SOD-523 package, higher leakage (1 µA @ 21.6 V) | Higher power margin but less precise low-current regulation due to elevated leakage | Select when higher surge energy absorption is required and leakage sensitivity is low |
| MMSZ4694T1G | 27 V nominal, ±5%, 500 mW rating, SOD-123 package, 1 µA leakage @ 21.6 V, larger footprint | Greater thermal mass and power headroom, but incompatible with ultra-dense layouts | Select when board space permits and long-term thermal cycling reliability is prioritized over size |
Compared with BZX584-C27 and MMSZ4694T1G, DDZ9712T-7 offers superior low-leakage performance and smallest footprint-critical for miniaturized battery-powered systems-while trading off absolute power handling for tighter integration and lower standby current.
Availability
DDZ9712T-7 is available at Aetrix Electronics and suitable for portable sensor biasing, USB port overvoltage clamp, and industrial PLC analog input protection requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for DDZ9712T-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 and manufacturing operations across Asia and the Americas.
The DDZ9689T–DDZ9717T series targets high-precision, low-power voltage reference and protection applications in space-constrained consumer, industrial, and computing systems-emphasizing sharp breakdown, low leakage, and full green compliance.
FAQ
What is the maximum zener test current (IZT) for DDZ9712T-7?
The datasheet specifies IZT = 5 mA for all devices in the DDZ9689T–DDZ9717T family, including DDZ9712T-7. This current defines the nominal zener voltage measurement condition and corresponds to the 150 mW power rating at 28 V (P = VZ × IZT = 28 V × 5 mA = 140 mW, within the 150 mW limit).
Is DDZ9712T-7 suitable for use in automotive applications?
Yes-DDZ9712T-7 is qualified for operation from –65 °C to +150 °C and meets AEC-Q200 stress test requirements for passive components. Its SOD523 package, low leakage, and stable TC characteristics make it appropriate for non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
How does the temperature coefficient behave for DDZ9712T-7?
Per Figure 18, DDZ9712T-7 (28 V type) exhibits a positive temperature coefficient of approximately +0.07 %/°C near 25 °C. This means its zener voltage increases by ~19.6 mV per °C rise-important for designs requiring temperature-stable references across wide ambient ranges.
Can DDZ9712T-7 be used in forward-bias configurations?
Yes-the device has a specified forward voltage of 0.9 V at 10 mA, confirming usable forward conduction. It is commonly employed in dual-role circuits, such as bidirectional ESD clamps or polarity-insensitive bias networks, where both forward and reverse characteristics are leveraged.
DDZ9712T-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):
- 28 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21.2 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
DDZ9712T-7 FAQ
1.How can I place an order for DDZ9712T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9712T-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 DDZ9712T-7 reliable?
The price and inventory of DDZ9712T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9712T-7 is usually 5 days.
3.What payment methods are accepted for DDZ9712T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9712T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9712T-7?
DDZ9712T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9712T-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 DDZ9712T-7?
For technical support, including DDZ9712T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9712T-7 requirements.
6.How does Aetrix verify that DDZ9712T-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9712T-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 DDZ9712T-7 meets industry standards.
7.What is the process for return or replacement of DDZ9712T-7?
All DDZ9712T-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9712T-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 DDZ9712T-7 part is unused and in its original packaging.
Return procedure for DDZ9712T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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