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Diodes Incorporated DDZ9686Q-7
- Part No.:
- DDZ9686Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9686Q-7.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
DDZ9686Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode in SOD123 package, rated for 3.9 V nominal zener voltage (±5% tolerance), 500 mW power dissipation at TL = +75°C, and specified at 50 µA test current - optimized for low-bias voltage regulation in portable battery-powered systems such as wearable sensors and IoT endpoint regulators.
For engineers reviewing the DDZ9686Q-7 datasheet, DDZ9686Q-7 pinout, DDZ9686Q-7 application, or DDZ9686Q-7 equivalent, key selection criteria include its AEC-Q101 qualification, SOD123 thermal performance (RθJA = 340 °C/W), low leakage (5 µA @ VR = 2 V), and automotive-grade traceability for safety-critical embedded power rails.
Technical Context
This device operates as a precision shunt voltage reference with stable breakdown behavior across -65°C to +150°C ambient range. Its zener voltage exhibits a temperature coefficient of approximately +0.04 %/°C near 3.9 V, enabling predictable drift compensation in analog sensor biasing circuits.
The diode features a cathode-band polarity marking, matte tin–annealed terminals on Alloy 42 leadframe, and moisture sensitivity level 1 per J-STD-020 - supporting high-yield reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal (3.70–4.10 V range at IZT = 50 µA); enables accurate 3.3 V rail clamping with margin. |
| Power Dissipation | 500 mW on FR-4 PCB at TL = +75°C; supports continuous operation in compact, unheatsinked layouts. |
| Reverse Leakage Current | 5 µA max at VR = 2 V; minimizes quiescent current draw in always-on battery monitoring circuits. |
| Thermal Resistance (Junction-to-Ambient) | 340 °C/W; defines derating slope - e.g., usable up to ~360 mW at TA = +85°C. |
| Operating Temperature | -65°C to +150°C; qualified for under-hood automotive and industrial control environments. |
| AEC-Q101 Qualified | Yes - validated for automotive applications requiring PPAP documentation and IATF 16949 manufacturing controls. |
Pinout & Package
Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, 2.65 mm × 1.55 mm footprint, 0.30 mm typical lead length. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse breakdown | Connected to lower-potential node (e.g., ground or return path) when regulating higher-voltage rail. |
| Cathode | Current exit terminal during reverse breakdown | Connected to regulated node (e.g., 3.3 V supply) - marked by visible band; must be held ≥3.9 V above anode. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables regulation in micro-power systems where bias current <100 µA is mandatory. |
| AEC-Q101 qualification | Validated for automotive use with full PPAP support, change control, and IATF 16949 production traceability. |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates without performance trade-offs. |
| Solderable matte tin finish | Meets MIL-STD-202 Method 208 - ensures reliable reflow wetting and intermetallic formation on standard PCB finishes. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Regulating reference voltage for LIN bus transceiver bias in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.9 V to op-amp input stage and comparator threshold. Use Value: Low 5 µA leakage preserves battery standby life over 10-year vehicle service life; AEC-Q101 ensures field reliability. |
Use Scenario: Biasing thermistor bridge in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage clamp stabilizing excitation source for ratiometric ADC measurements. Use Value: ±5% VZ tolerance and +0.04 %/°C TC enable <0.5% total error over -40°C to +125°C operating range. |
| Portable Medical Glucose Monitor | Smart Home Smoke Detector MCU Supply |
|
Use Scenario: Providing regulated 3.3 V reference for electrochemical sensor amplifier in disposable test strip readers. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator replacing LDO in space-constrained, coin-cell–powered design. Use Value: 50 µA test current matches typical sensor bias requirement - eliminates need for external current source. |
Use Scenario: Clamping backup battery voltage to protect ESP32-based alarm controller during brownout events. IC Role / Device Role / Timing Role: Overvoltage protection element limiting VDD to 3.9 V during CR123A primary cell discharge. Use Value: 500 mW rating sustains 100 ms surge without degradation; SOD123 footprint fits 2-layer PCB cost targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 (Nexperia) | Same 3.9 V nominal, but rated 300 mW (SOT23), higher RθJA (~500 °C/W), no AEC-Q101 certification. | Limited to commercial-temperature consumer electronics; unsuitable for automotive or extended-temp industrial use. | Select only if cost is primary constraint and AEC-Q101/thermal performance are not required. |
| MMSZ4685 (ON Semiconductor) | 3.9 V nominal, 500 mW, SOD123, but IR = 10 µA @ VR = 2 V (double DDZ9686Q-7's leakage) and no AEC-Q101 listing. | Acceptable for non-automotive battery monitors where 10 µA leakage is tolerable and PPAP not mandated. | Prefer when sourcing legacy-compatible parts but verify leakage impact on battery runtime. |
Compared with BZX84-C3V9 and MMSZ4685, DDZ9686Q-7 delivers superior thermal robustness (340 vs. ≥500 °C/W), half the leakage current, and full automotive qualification - making it the only choice for AEC-compliant, long-life, low-power shunt regulation.
Availability
DDZ9686Q-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and portable medical glucose monitors requiring stable component supply with full traceability and lifecycle continuity.
Supply support for DDZ9686Q-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.
This part belongs to Diodes' automotive-qualified Zener diode family targeting low-power voltage reference and overvoltage protection in harsh-environment embedded systems - designed specifically for AEC-Q101 compliance and high-volume automated assembly.
FAQ
What is the maximum reverse voltage (VR) at which DDZ9686Q-7 guarantees ≤5 µA leakage?
DDZ9686Q-7 guarantees ≤5 µA reverse leakage current at VR = 2 V, per Electrical Characteristics Table in DS30410 Rev. 17-2. This value is measured at TA = +25°C using short-duration pulse testing to minimize self-heating effects. At VR = 3.0 V, leakage rises to ~15 µA - confirming tight regulation near nominal VZ.
Can DDZ9686Q-7 replace a 3.3 V Zener in a 3.3 V rail clamp circuit?
No - DDZ9686Q-7 has a nominal zener voltage of 3.9 V (min 3.70 V, max 4.10 V), making it unsuitable as a 3.3 V clamp. Using it would allow rail voltage to rise to ≥3.7 V before conduction, risking overvoltage stress on 3.3 V logic. For 3.3 V clamping, DDZ9684Q-7 (3.3 V nominal) is the correct variant in this series.
Is the SOD123 package of DDZ9686Q-7 compatible with standard reflow profiles for lead-free solder?
Yes - DDZ9686Q-7 uses matte tin–annealed terminals compliant with MIL-STD-202 Method 208 and is rated for standard IPC/JEDEC J-STD-020D Level 1 moisture sensitivity. It withstands peak reflow temperatures up to 260°C and is qualified for Pb-free SAC305 solder processes without delamination or voiding.
Does DDZ9686Q-7 have a specified zener impedance (ZZT) at 50 µA?
No - the datasheet does not list dynamic impedance at IZT = 50 µA. However, Figure 11 shows typical ZZT ≈ 900 Ω at 1 mA for DDZ9682–DDZ9692 devices; extrapolating conservatively, ZZT at 50 µA is >5 kΩ. For low-impedance regulation, higher-current Zeners or active references should be considered.
DDZ9686Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
DDZ9686Q-7 FAQ
1.How can I place an order for DDZ9686Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9686Q-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 DDZ9686Q-7 reliable?
The price and inventory of DDZ9686Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9686Q-7 is usually 5 days.
3.What payment methods are accepted for DDZ9686Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9686Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9686Q-7?
DDZ9686Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9686Q-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 DDZ9686Q-7?
For technical support, including DDZ9686Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9686Q-7 requirements.
6.How does Aetrix verify that DDZ9686Q-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9686Q-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 DDZ9686Q-7 meets industry standards.
7.What is the process for return or replacement of DDZ9686Q-7?
All DDZ9686Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9686Q-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 DDZ9686Q-7 part is unused and in its original packaging.
Return procedure for DDZ9686Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9686Q-7 Tags
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