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Diodes Incorporated DDZ9686-7
- Part No.:
- DDZ9686-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9686-7.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:634
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Product details
Overview
DDZ9686-7 from Diodes Incorporated is a surface-mount low-current Zener diode in SOD123 package, rated for 3.9 V nominal zener voltage (3.70–4.10 V), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It features low reverse leakage (5 µA @ VR = 2 V), 150 °C/W junction-to-lead thermal resistance, and is optimized for low-bias, battery-powered voltage reference and regulation circuits.
For engineers reviewing the DDZ9686-7 datasheet, DDZ9686-7 pinout, DDZ9686-7 application, or DDZ9686-7 equivalent, this device serves as a precision, low-power voltage clamp in portable instrumentation, sensor biasing, and microcontroller reset circuitry where stable low-current zener operation is required.
Technical Context
This Zener diode operates in reverse breakdown with tightly controlled voltage tolerance (±5% at IZT = 50 µA) and exhibits low dynamic impedance (typ. 25 Ω at IZ = 5 mA), enabling stable reference performance under light load conditions. Its SOD123 package supports automated placement and offers 340 °C/W junction-to-ambient thermal resistance on standard FR-4 layout.
The device is characterized across -65°C to +150°C operating range, with temperature coefficient of zener voltage near zero at ~3.9 V (≈+0.02 %/°C per Fig. 17), minimizing drift in ambient-varying applications. Reverse leakage remains ≤5 µA up to VR = 2 V, supporting ultra-low quiescent current designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.9 V - Stable reference point for low-power voltage clamping and biasing |
| Zener Voltage Range | 3.70 V to 4.10 V - ±5% tolerance ensures predictable regulation without trimming |
| Test Current (IZT) | 50 µA - Enables operation in micropower systems such as coin-cell IoT sensors |
| Max Reverse Leakage (IR) | 5 µA @ VR = 2 V - Minimizes standby current drain in battery-critical applications |
| Power Dissipation | 500 mW @ TL = +75°C - Supports moderate transient clamping on standard PCB land pattern |
| Junction-to-Lead Thermal Resistance | 150 °C/W - Enables reliable thermal coupling to PCB copper for sustained low-current operation |
| Forward Voltage | 0.9 V @ IF = 10 mA - Confirms standard silicon PN junction behavior for forward conduction checks |
Pinout & Package
Package: SOD123 - Surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode indicated by band. Dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse breakdown cathode reference | Connected to lower-potential node in zener configuration; enables standard cathode-grounded regulation |
| Cathode | Reverse breakdown terminal / Reference output node | Marked with band; tied to regulated voltage rail; defines clamping polarity and reference polarity |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - eliminates need for high-bias current sources in ultra-low-power designs |
| Automated assembly compatibility | SOD123 footprint with matte tin annealed terminals - ensures robust solderability and pick-and-place reliability |
| Thermal stability | +0.02 %/°C tempco near 3.9 V - reduces calibration burden in consumer-grade temperature environments |
| Environmental compliance | Lead-free, RoHS 3 compliant, halogen- and antimony-free - meets global regulatory requirements for commercial and automotive use |
| Robust packaging | UL 94V-0 molded plastic case - provides mechanical protection and flame resistance for compact PCB layouts |
Applications
| Portable Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 3.9 V bias to analog front-end of MEMS accelerometers in wearables. IC Role / Device Role / Timing Role: Zener voltage reference for ADC reference divider and op-amp bias network. Use Value: 50 µA test current and low IR ensure <1 µA total quiescent draw, extending coin-cell life beyond 2 years. |
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCU in smart home controllers. IC Role / Device Role / Timing Role: Precision voltage clamp defining POR and brown-out detection level. Use Value: ±5% VZ tolerance and +0.02 %/°C tempco eliminate external trimming and reduce BOM count by one resistor. |
| USB-C Power Negotiation Clamp | Industrial Signal Conditioning |
|
Use Scenario: Clamping CC line voltage during USB PD communication handshake to prevent overvoltage damage. IC Role / Device Role / Timing Role: Transient voltage suppressor with fast response and minimal capacitance (≈2 pF). Use Value: Low 2 pF capacitance avoids signal integrity degradation on 300 kHz CC bus; SOD123 size fits tight connector routing. |
Use Scenario: Stabilizing 4–20 mA loop transmitter reference in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Low-drift voltage reference for DAC output scaling and current-sense amplifier offset setting. Use Value: -65°C to +150°C operating range and 150 °C/W RθJL support reliable operation inside sealed enclosures at 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 (ON Semiconductor) | Same 3.9 V nominal, but rated at 300 mW (vs. 500 mW); higher IR (10 µA @ 2 V) | Limited to lower-power clamping; less suitable for extended battery life designs | Select when cost sensitivity outweighs thermal margin and leakage requirements |
| MMSZ4686 (Vishay) | Identical 3.9 V rating and 50 µA IZT, but SOD-123 package with 350 °C/W RθJA (vs. 340 °C/W) | Marginally reduced thermal performance on same PCB layout; identical electrical specs | Choose if dual-sourcing is required and thermal derating curves align with system constraints |
Compared with BZX84-C3V9 and MMSZ4686, DDZ9686-7 delivers superior thermal capability (500 mW rating), lowest leakage (5 µA), and tighter process control for long-term stability in space-constrained, battery-sensitive applications.
Availability
DDZ9686-7 is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, USB-C voltage clamping, and industrial 4–20 mA loop references requiring stable component supply across production lifecycles.
Supply support for DDZ9686-7 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 ICs, specializing in high-reliability, application-optimized components for power management, signal integrity, and protection.
DDZ9686-7 belongs to the DDZ9678–DDZ9717 series of low-current Zener diodes, designed specifically for energy-efficient voltage reference and regulation in portable, automotive, and industrial electronics.
FAQ
What is the maximum continuous power dissipation for DDZ9686-7 on a standard FR-4 PCB?
The DDZ9686-7 is rated for 500 mW power dissipation when mounted on FR-4 PCB with minimum recommended pad layout at lead temperature TL = +75°C. Derating begins linearly above +75°C, reaching zero at +150°C ambient, per Figure 1 in DS30410 Rev. 17-2.
Is DDZ9686-7 suitable for automotive applications?
DDZ9686-7 itself is the standard industrial version. The automotive-qualified variant is DDZ9686Q-7, which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Standard DDZ9686-7 is not certified for automotive use.
What is the typical zener impedance of DDZ9686-7 at 5 mA?
Based on Figure 11 in DS30410 Rev. 17-2, the typical zener impedance for DDZ9686-7 (3.9 V type) is approximately 25 Ω at IZ = 5 mA and TJ = +25°C. This value increases significantly below 1 mA and decreases slightly above 10 mA.
How is polarity identified on the DDZ9686-7 SOD123 package?
Polarity is marked by a cathode band on the body end of the SOD123 package. Per Mechanical Data section, "Terminal Connections: Cathode Band" - the banded end is the cathode; the opposite end is the anode. This matches industry-standard SOD123 orientation.
DDZ9686-7 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ9686-7 FAQ
1.How can I place an order for DDZ9686-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9686-7 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 DDZ9686-7 reliable?
The price and inventory of DDZ9686-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9686-7 is usually 5 days.
3.What payment methods are accepted for DDZ9686-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9686-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9686-7?
DDZ9686-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9686-7 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 DDZ9686-7?
For technical support, including DDZ9686-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9686-7 requirements.
6.How does Aetrix verify that DDZ9686-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9686-7 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 DDZ9686-7 meets industry standards.
7.What is the process for return or replacement of DDZ9686-7?
All DDZ9686-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9686-7, 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 DDZ9686-7 part is unused and in its original packaging.
Return procedure for DDZ9686-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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