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Diodes Incorporated DDZ9711Q-7
- Part No.:
- DDZ9711Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9711Q-7.pdf
- Description:
- DIODE ZENER 27V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,584
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Product details
Overview
DDZ9711Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode with a nominal zener voltage of 27 V (min 25.65 V, max 28.35 V), rated for 500 mW power dissipation on FR-4 PCB at TL = +75°C, specified at 50 µA test current, and housed in an AEC-Q101 qualified SOD123 package - used for precision voltage reference and overvoltage protection in automotive sensor signal conditioning circuits.
For engineers reviewing the DDZ9711Q-7 datasheet, DDZ9711Q-7 pinout, DDZ9711Q-7 application, or DDZ9711Q-7 equivalent, key selection criteria include its 27 V zener tolerance (±5%), ultra-low 50 µA test current suitability for battery-powered systems, AEC-Q101 qualification for automotive use, and SOD123 thermal resistance (RθJA = 340 °C/W) under standard mounting conditions.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents, with a typical zener impedance of ~120 Ω at IZT = 50 µA and 27 V nominal output. Its temperature coefficient is +0.07 %/°C near 27 V, enabling predictable drift compensation in analog front-ends.
The device features a cathode band marking for polarity identification, matte tin–annealed terminals solderable per MIL-STD-202 Method 208, and moisture sensitivity level 1 per J-STD-020 - confirming compatibility with standard reflow profiles and high-reliability automotive assembly lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 27 V - precise reference point for 24 V system overvoltage clamping and ADC reference stabilization |
| Zener Voltage Range | 25.65 V to 28.35 V - ±5% tolerance ensures consistent trip thresholds across production lots |
| Test Current (IZT) | 50 µA - enables low-power biasing in always-on sensor monitoring circuits without draining battery reserves |
| Max Reverse Leakage (IR) | 0.05 µA @ VR = 20.4 V - guarantees minimal quiescent current draw below breakdown, critical for energy harvesting nodes |
| Power Dissipation | 500 mW @ TL = +75°C - supports sustained regulation in engine control unit ambient environments with minimal heatsinking |
| Thermal Resistance (RθJA) | 340 °C/W - defines junction-to-ambient rise per watt on standard FR-4 layout; requires ≥1 in² copper pour for full rating |
| AEC-Q101 Qualified | Yes - validated for automotive applications including powertrain sensors and body electronics requiring PPAP documentation |
Pinout & Package
Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, 1.00–1.35 mm height (A), 2.55–2.85 mm width (E), 3.55–3.85 mm length (He). Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system GND or low-impedance return path; establishes reference potential for regulated output |
| Cathode | Reverse-biased Zener terminal / regulated output node | Supplies stable 27 V to downstream circuitry when reverse biased above breakdown; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | 50 µA IZT enables use in micropower sensor bias networks without compromising regulation accuracy |
| AEC-Q101 qualification | Validated for automotive under-hood applications including transmission position sensors and exhaust gas recirculation controllers |
| SOD123 footprint | Standardized 2-pin outline compatible with automated pick-and-place and reflow processes; no lead-free solder compatibility issues |
| Halogen & antimony free | Meets <900 ppm Br/Cl (<1500 ppm total) and <1000 ppm Sb - compliant with EU "Green" product directives for end-of-life recycling |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 24 V supply rail transients during load dump events in diesel ECU power management. IC Role / Device Role / Timing Role: Zener clamp protecting microcontroller I/O and CAN transceiver VCC pins from >40 V spikes. Use Value: Withstands 500 mW surge for 100 ms while holding voltage ≤28.35 V, preventing latch-up in 3.3 V logic domains. |
Use Scenario: Providing stable 27 V reference for 16-bit sigma-delta ADC measuring thermocouple outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and +0.07 %/°C TC for ratiometric measurement calibration. Use Value: Enables <0.1% full-scale error over –40°C to +125°C ambient, meeting IEC 61000-4-5 surge immunity requirements. |
| Portable Medical Vital Sign Monitor | Battery Management System (BMS) Cell Balancing |
Use Scenario: Biasing photodiode amplifier stages in handheld pulse oximeters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-current Zener reference generating stable 27 V for op-amp rail-splitting network. Use Value: Draws only 50 µA at regulation, extending battery life beyond 72 hours per charge while maintaining SNR >85 dB. |
Use Scenario: Overvoltage protection for passive cell-balancing FET gate drivers in 12S lithium iron phosphate battery packs. IC Role / Device Role / Timing Role: Clamp diode limiting gate drive voltage to 27 V during transient coupling from adjacent cells. Use Value: Prevents MOSFET gate oxide breakdown during 100 ns fast-rising common-mode noise, verified per ISO 16750-2 Pulse 5a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | Same 27 V nominal, but rated 300 mW (vs. 500 mW), SOT-23 package, RθJA = 375 °C/W | Limited to lower-power portable devices; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| MMSZ5256BT1G | 27 V nominal, 500 mW rating, SOD-123 package, but only industrial temp range (–65°C to +150°C vs. AEC-Q101 extended reliability screening) | Acceptable for non-automotive industrial controls, but lacks PPAP documentation support | Select for cost-sensitive industrial designs where AEC-Q101 traceability is not mandated |
Compared with BZX84-C27LT1G and MMSZ5256BT1G, DDZ9711Q-7 delivers higher power headroom, automotive-grade reliability validation, and tighter process control for safety-critical voltage clamping - making it the preferred choice for ECU, ADAS, and battery pack applications demanding zero field failures.
Availability
DDZ9711Q-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioners, portable medical monitors, and battery management systems requiring stable component supply with full AEC-Q101 compliance and traceable sourcing.
Supply support for DDZ9711Q-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.
The DDZ9xxxQ series belongs to Diodes' AEC-Q101 qualified Zener diode product line, engineered specifically for automotive voltage regulation, ESD protection, and precision reference applications where reliability under thermal and electrical stress is mandatory.
FAQ
What is the maximum continuous reverse voltage (VR) that DDZ9711Q-7 can withstand without breakdown?
DDZ9711Q-7 exhibits a maximum reverse leakage current of 0.05 µA at VR = 20.4 V, meaning it remains in high-impedance blocking mode up to this voltage. Breakdown begins near 25.65 V (minimum zener voltage), with full regulation established at 50 µA test current. Operation above 28.35 V risks exceeding power limits unless current is strictly limited.
Is DDZ9711Q-7 compatible with lead-free reflow soldering processes?
Yes - DDZ9711Q-7 uses matte tin–annealed terminals over Alloy 42 leadframe and is fully RoHS 3 compliant (2015/863/EU). It meets MIL-STD-202 Method 208 solderability requirements and is qualified for standard Pb-free reflow profiles (peak 260°C, 10-second dwell), with moisture sensitivity level 1 per J-STD-020.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
At 27 V nominal, DDZ9711Q-7 has a typical temperature coefficient of +0.07 %/°C (Fig. 19). Over –40°C to +125°C, this results in a total zener voltage shift of approximately ±1.16 V (±4.3%), which is factored into design margins for ECU overvoltage clamps and sensor reference circuits requiring worst-case tolerance analysis.
Can DDZ9711Q-7 be used in place of a 24 V Zener for 24 V system protection?
No - DDZ9711Q-7 is a 27 V device (25.65–28.35 V range), not 24 V. Substituting it for a 24 V Zener would raise clamping voltage by ~3 V, potentially exposing downstream 24 V-rated components to unsafe overvoltage. For 24 V systems, DDZ9702Q-7 (15 V) or DDZ9709Q-7 (24 V) are appropriate alternatives within the same family.
DDZ9711Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ9711Q-7 FAQ
1.How can I place an order for DDZ9711Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9711Q-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 DDZ9711Q-7 reliable?
The price and inventory of DDZ9711Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9711Q-7 is usually 5 days.
3.What payment methods are accepted for DDZ9711Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9711Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9711Q-7?
DDZ9711Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9711Q-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 DDZ9711Q-7?
For technical support, including DDZ9711Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9711Q-7 requirements.
6.How does Aetrix verify that DDZ9711Q-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9711Q-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 DDZ9711Q-7 meets industry standards.
7.What is the process for return or replacement of DDZ9711Q-7?
All DDZ9711Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9711Q-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 DDZ9711Q-7 part is unused and in its original packaging.
Return procedure for DDZ9711Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9711Q-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
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