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Diodes Incorporated DDZ6V8ASF-7
- Part No.:
- DDZ6V8ASF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ6V8ASF-7.pdf
- Description:
- DIODE ZENER 6.46V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:8,244
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Product details
Overview
DDZ6V8ASF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage 6.49–6.83 V at 20 mA test current, ±5% tolerance, 30 Ω dynamic impedance at 1 kHz, and 7.5 µA maximum reverse leakage at 4 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog signal conditioning, power supply feedback loops, and sensor biasing circuits.
For engineers reviewing the DDZ6V8ASF-7 datasheet, DDZ6V8ASF-7 pinout, DDZ6V8ASF-7 application, or DDZ6V8ASF-7 equivalent, key selection criteria include its tight VZ tolerance, low ZZT, SOD323F package thermal performance (RθJA = 250°C/W), and AEC-Q200 readiness for automotive-grade designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across load variations and temperature shifts. Its 6.49–6.83 V nominal range targets mid-range voltage regulation where low noise and predictable TC are critical - such as in ADC reference buffers and op-amp feedback networks.
Designed for FR-4 PCB mounting with 10 mm × 10 mm copper pad, it delivers 500 mW power dissipation and exhibits a typical temperature coefficient near +2.5 mV/°C (inferred from Fig. 3 for ~6.8 V devices), enabling predictable drift compensation in precision circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.49–6.83 V @ IZT = 20 mA - defines stable regulation point for feedback or reference use |
| Zener Impedance (ZZT) | 30 Ω @ f = 1 kHz - ensures minimal output voltage variation under dynamic load changes |
| Power Dissipation (PD) | 500 mW on FR-4 - supports continuous operation in compact, thermally constrained layouts |
| Reverse Leakage (IR) | 7.5 µA @ VR = 4 V - guarantees low quiescent current in high-impedance sensing nodes |
| Thermal Resistance (RθJA) | 250 °C/W - enables accurate junction temperature estimation for reliability margining |
| Package | SOD323F - ultra-small 1.25 mm × 1.70 mm footprint ideal for space-constrained PCBs |
| Forward Voltage (VF) | 0.9 V @ IF = 10 mA - usable as low-drop rectifier or ESD protection element in dual-role designs |
Pinout & Package
Package: SOD323F - molded plastic, halogen- and antimony-free "Green" compound (UL 94V-0), cathode band marking, matte tin-plated copper alloy leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground when used in shunt regulation; determines polarity of breakdown voltage |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; supplies stable VZ relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±5% (6.49–6.83 V) - reduces calibration overhead in factory-trimmed systems |
| Low dynamic impedance | 30 Ω at 1 kHz - maintains regulation accuracy during transient load steps |
| Automated assembly compatibility | SOD323F package with J-STD-020 Level 1 moisture sensitivity - eliminates bake requirements pre-reflow |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free - meets automotive and industrial environmental mandates |
| Thermal performance | 250 °C/W RθJA on standard FR-4 - allows direct thermal modeling without derating assumptions |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Feedback |
|---|---|
|
Use Scenario: Stabilizing reference voltage for bridge sensor amplifiers in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing 6.8 V bias to instrumentation amplifier input stage. Use Value: Tight 6.49–6.83 V tolerance and 30 Ω ZZT ensure <±0.5% gain stability across –40°C to +85°C ambient. |
Use Scenario: Setting precise feedback threshold in secondary-side voltage regulation for USB PD 3.0 adapters. IC Role / Device Role / Timing Role: Zener clamping element in optocoupler feedback loop to define 6.8 V regulation setpoint. Use Value: Low 7.5 µA leakage at 4 V prevents false triggering during standby; SOD323F footprint fits high-density flyback transformer layouts. |
| Automotive Cabin Temperature Sensor | Medical Pulse Oximeter Bias Supply |
|
Use Scenario: Providing stable excitation voltage to NTC thermistor in HVAC control units. IC Role / Device Role / Timing Role: Precision shunt regulator establishing 6.8 V reference for ratiometric ADC measurement. Use Value: AEC-Q200 readiness and –65°C to +150°C operating range support under-hood deployment without external qualification. |
Use Scenario: Generating clean bias for red/IR LED drivers in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise voltage clamp ensuring consistent LED forward current despite battery voltage sag. Use Value: 30 Ω ZZT and <0.9 V VF enable stable LED current control while minimizing power loss in battery-operated devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B6V8,115 (Nexperia) | Same SOD323 package; 6.65–7.05 V range; 40 Ω ZZT; 3 µA IR @ 4 V | Lower leakage but higher impedance - better for ultra-low-IQ bias, less stable under load transients | Select if system prioritizes leakage-critical high-impedance nodes over regulation stiffness |
| MMSZ4687T1G (onsemi) | SOD123 package; 6.46–6.98 V; 30 Ω ZZT; 7.5 µA IR @ 4 V; RθJA = 350°C/W | Larger footprint and higher thermal resistance - requires larger copper area for same power handling | Select only if board layout already uses SOD123 or legacy design reuse outweighs thermal efficiency |
Compared with BZX384-B6V8 and MMSZ4687T1G, DDZ6V8ASF-7 offers optimal balance of low ZZT, industry-leading thermal performance on FR-4, and automotive-ready qualification - making it preferred for space- and stability-constrained designs.
Availability
DDZ6V8ASF-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery feedback circuits, and automotive cabin electronics requiring stable component supply and long-term lifecycle continuity.
Supply support for DDZ6V8ASF-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, specializing in high-reliability components for automotive, industrial, and consumer markets.
This device belongs to Diodes' DDZxASF/BSF/CSF series of precision Zener diodes, engineered specifically for applications demanding tight voltage tolerance, low impedance, and robust thermal behavior in miniature surface-mount packages.
FAQ
What is the maximum continuous power dissipation for DDZ6V8ASF-7 on standard FR-4 PCB?
The DDZ6V8ASF-7 is rated for 500 mW continuous power dissipation when mounted on FR-4 with a 10 mm × 10 mm copper pad (per DS31987 Rev. 23–2, Note 5). Derating begins above +25°C ambient per the published power derating curve (Fig. 1), reaching zero at +150°C.
Does DDZ6V8ASF-7 meet AEC-Q200 requirements for automotive use?
DDZ6V8ASF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 out-of-box, Diodes confirms it is suitable for automotive applications requiring specific change control - qualification can be initiated upon customer request with full test reports.
How does the SOD323F package affect thermal performance compared to SOD123?
The SOD323F package delivers RθJA = 250°C/W on FR-4 (vs. ~350°C/W for SOD123), due to optimized leadframe geometry and thermal path design. This 29% lower thermal resistance enables higher sustained power or tighter ambient temperature margins in dense layouts.
Can DDZ6V8ASF-7 be used in forward-bias applications?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, and it is fully characterized for forward conduction. It is commonly used in dual-role circuits, such as reverse-polarity protection combined with Zener clamping, leveraging its low VF and robust surge capability per JEDEC standards.
DDZ6V8ASF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.46 V
- Tolerance:
- ±2.63%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 4 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-323F
DDZ6V8ASF-7 FAQ
1.How can I place an order for DDZ6V8ASF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ6V8ASF-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 DDZ6V8ASF-7 reliable?
The price and inventory of DDZ6V8ASF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ6V8ASF-7 is usually 5 days.
3.What payment methods are accepted for DDZ6V8ASF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ6V8ASF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ6V8ASF-7?
DDZ6V8ASF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ6V8ASF-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 DDZ6V8ASF-7?
For technical support, including DDZ6V8ASF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ6V8ASF-7 requirements.
6.How does Aetrix verify that DDZ6V8ASF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ6V8ASF-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 DDZ6V8ASF-7 meets industry standards.
7.What is the process for return or replacement of DDZ6V8ASF-7?
All DDZ6V8ASF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ6V8ASF-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 DDZ6V8ASF-7 part is unused and in its original packaging.
Return procedure for DDZ6V8ASF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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