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Diodes Incorporated DDZ9683-7
- Part No.:
- DDZ9683-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9683-7.pdf
- Description:
- DIODE ZENER 3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,013
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Product details
Overview
DDZ9683-7 from Diodes Incorporated is a surface-mount low-current Zener diode with a nominal zener voltage of 3.0 V (min 2.85 V, max 3.15 V), rated for 500 mW power dissipation on FR-4 PCB at TL = +75°C, and specified at a low test current of 50 µA - ideal for low-bias, battery-powered voltage reference and regulation in portable electronics.
For engineers reviewing the DDZ9683-7 datasheet, DDZ9683-7 pinout, DDZ9683-7 application, or DDZ9683-7 equivalent, this device is selected for precision low-power voltage clamping, analog sensor biasing, and microcontroller reset circuitry where stable low-voltage reference under light load is required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable voltage across its terminals under controlled current conditions. Its 3.0 V nominal zener voltage exhibits a temperature coefficient near zero (≈0.02 %/°C per Fig. 17), minimizing drift over temperature in precision reference designs.
Designed for automated SMT assembly, it features a cathode band marking and matte tin–annealed terminals solderable per MIL-STD-202. The SOD123 package provides compact footprint (2.65 mm × 1.55 mm) and thermal resistance of 150 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal (2.85–3.15 V range at IZT = 50 µA); enables accurate 3.0 V rail clamping or reference generation in low-power circuits. |
| Power Dissipation (PD) | 500 mW on FR-4 PCB at TL = +75°C; supports sustained operation in thermally constrained consumer and IoT PCB layouts. |
| Reverse Leakage (IR) | ≤0.8 µA at VR = 1 V; ensures minimal quiescent current draw in battery-critical applications like wearables and remote sensors. |
| Thermal Resistance (RθJL) | 150 °C/W junction-to-lead; allows predictable thermal modeling when mounted on standard SOD123 pad layout per Diodes' recommended footprint. |
| Package | SOD123 plastic case (UL 94V-0); compatible with high-volume reflow processes and meets IPC-7351B land pattern standards. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA; confirms low-loss forward conduction for polarity-sensitive protection or dual-use configurations. |
Pinout & Package
SOD123 surface-mount package: anode and cathode terminals formed by a molded plastic body with cathode band marking; dimensions: L = 0.30 mm (lead length), D = 1.55 mm (width), E = 2.65 mm (length), A = 1.05 mm (height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener operation. | Provides current entry path during forward conduction; tied to ground or common return in shunt regulator topology. |
| Cathode | Negative terminal in forward bias; higher-potential node in Zener operation. | Connected to regulated voltage node; cathode band identifies polarity for correct PCB orientation and functional reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current (50 µA) | Enables stable regulation in ultra-low-power systems (e.g., coin-cell–powered sensors) without loading the source. |
| 500 mW power rating on FR-4 | Supports robust transient suppression and continuous reference duty in space-constrained industrial control modules. |
| SOD123 package with J-STD-020 Level 1 moisture sensitivity | Eliminates bake requirements before reflow, reducing manufacturing cost and cycle time in high-mix SMT lines. |
| Halogen- and antimony-free "Green" construction | Meets strict environmental compliance (RoHS 3, JEDEC J-STD-020) for global consumer and medical OEM deployments. |
Applications
| Portable Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 3.0 V reference to analog front-end of temperature/humidity sensors in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor supply rail and ADC reference input. Use Value: Low 50 µA test current minimizes battery drain while maintaining ±5% zener tolerance over -40°C to +85°C ambient. |
Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ MCUs during power-up and brown-out events. IC Role / Device Role / Timing Role: Precision voltage clamp defining reset threshold at 3.0 V ±0.15 V. Use Value: Sub-1 µA leakage at 1 V ensures no false triggering; 0.9 V forward drop enables bidirectional protection if needed. |
| Low-Power LED Current Control | USB-C Port Voltage Clamp |
|
Use Scenario: Setting constant current for indicator LEDs in hearing aids and smart pens using simple resistor-Zener bias network. IC Role / Device Role / Timing Role: Voltage reference establishing emitter-base bias point for current-regulating transistor. Use Value: Tight 2.85–3.15 V tolerance ensures consistent LED brightness across production lots and temperature ranges. |
Use Scenario: Clamping VBUS monitor line in USB-C PD sink applications to protect ADC input from overvoltage transients. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting sensed voltage to safe 3.0 V level before ADC sampling. Use Value: 150 °C/W RθJL enables rapid heat dissipation during 100 ms surge events without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V0 (ON Semiconductor) | Same 3.0 V nominal, but rated at 500 mW on larger DO-35 package; higher RθJA (500 °C/W) limits PCB-level power handling. | Requires larger board area; less suitable for ultra-thin wearable PCBs where SOD123 footprint is critical. | Select DDZ9683-7 for space-constrained SMT designs; choose BZX55C3V0 only if legacy through-hole compatibility is required. |
| MMSZ4683 (Diodes Inc.) | Identical 3.0 V rating and SOD123 package, but specified at IZT = 5 mA (not 50 µA); higher dynamic impedance above 100 µA. | Not optimized for sub-100 µA bias networks; exhibits greater voltage variation under light-load sensor reference conditions. | Prefer DDZ9683-7 for battery life–sensitive applications; use MMSZ4683 only in higher-current regulator feedback paths. |
Compared with BZX55C3V0 and MMSZ4683, DDZ9683-7 uniquely combines 50 µA test current, SOD123 footprint, and <0.8 µA leakage at 1 V - making it the optimal choice for energy-harvesting and coin-cell–powered systems requiring long-term voltage stability without load-induced drift.
Availability
DDZ9683-7 is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, low-power LED current control, and USB-C port voltage clamp applications requiring stable component supply and full RoHS/Green compliance.
Supply support for DDZ9683-7 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 DDZ9678–DDZ9717 series belongs to Diodes' precision low-current Zener diode product line, engineered specifically for voltage reference and clamping in battery-powered, space-constrained, and environmentally regulated electronic systems.
FAQ
What is the maximum reverse voltage (VR) at which DDZ9683-7 guarantees ≤0.8 µA leakage?
DDZ9683-7 guarantees ≤0.8 µA reverse leakage current at VR = 1 V, as specified in the Electrical Characteristics table (Note 7). This value is measured using short-duration pulse testing to minimize self-heating effects, ensuring reliable low-leakage performance in always-on sensor bias rails.
Can DDZ9683-7 be used in automotive applications?
Yes - the automotive-grade variant DDZ9683Q-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. The standard DDZ9683-7 is not automotive-qualified; for automotive designs, specify the Q-suffix version and confirm qualification status via Diodes' automotive product definitions page.
What is the thermal resistance from junction to ambient (RθJA) for DDZ9683-7 on a standard FR-4 PCB?
DDZ9683-7 has a thermal resistance of 340 °C/W junction-to-ambient when mounted on FR-4 PCB with Diodes' recommended minimum pad layout (documented in their Suggested Pad Layout guide). This value assumes TL = +75°C and defines safe derating curves for continuous operation up to +125°C ambient.
Does DDZ9683-7 have a defined zener impedance (ZZT) at 50 µA test current?
No - zener impedance is not specified at IZT = 50 µA in the datasheet. Typical zener impedance values are provided in Figures 11–16 for higher currents (1 mA to 100 mA), with DDZ9683 falling in the 3.0 V group (Fig. 11). At 50 µA, impedance is inherently high (>10 kΩ), consistent with low-current Zener behavior.
DDZ9683-7 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 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 800 nA @ 1 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-123
DDZ9683-7 FAQ
1.How can I place an order for DDZ9683-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9683-7 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 DDZ9683-7 reliable?
The price and inventory of DDZ9683-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9683-7 is usually 5 days.
3.What payment methods are accepted for DDZ9683-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9683-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9683-7?
DDZ9683-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9683-7 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 DDZ9683-7?
For technical support, including DDZ9683-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9683-7 requirements.
6.How does Aetrix verify that DDZ9683-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9683-7 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 DDZ9683-7 meets industry standards.
7.What is the process for return or replacement of DDZ9683-7?
All DDZ9683-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9683-7, 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 DDZ9683-7 part is unused and in its original packaging.
Return procedure for DDZ9683-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9683-7 Tags
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